QtWidgets: use _L1 for for creating Latin-1 string literals

Task-number: QTBUG-98434
Change-Id: I310ea8f19d73a79d985ebfb8bfbff7a02c424360
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

56 files changed, 810 insertions, 723 deletions

diff --git a/src/widgets/accessible/complexwidgets.cpp b/src/widgets/accessible/complexwidgets.cpp
index ab543a79df..3030208c89 100644
--- a/src/widgets/accessible/complexwidgets.cpp
+++ b/src/widgets/accessible/complexwidgets.cpp
@@ -76,6 +76,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QString qt_accStripAmp(const QString &text);
 QString qt_accHotKey(const QString &text);
 
@@ -517,9 +519,9 @@ QAccessibleAbstractScrollArea::elementType(QWidget *widget) const
         return Self;
     if (widget == abstractScrollArea()->viewport())
         return Viewport;
-    if (widget->objectName() == QLatin1String("qt_scrollarea_hcontainer"))
+    if (widget->objectName() == "qt_scrollarea_hcontainer"_L1)
         return HorizontalContainer;
-    if (widget->objectName() == QLatin1String("qt_scrollarea_vcontainer"))
+    if (widget->objectName() == "qt_scrollarea_vcontainer"_L1)
         return VerticalContainer;
     if (widget == abstractScrollArea()->cornerWidget())
         return CornerWidget;
diff --git a/src/widgets/accessible/qaccessiblewidget.cpp b/src/widgets/accessible/qaccessiblewidget.cpp
index 1a8d2febec..28583f9872 100644
--- a/src/widgets/accessible/qaccessiblewidget.cpp
+++ b/src/widgets/accessible/qaccessiblewidget.cpp
@@ -68,6 +68,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 static QList<QWidget*> childWidgets(const QWidget *widget)
 {
     QList<QWidget*> widgets;
@@ -78,8 +80,8 @@ static QList<QWidget*> childWidgets(const QWidget *widget)
 #if QT_CONFIG(menu)
             && !qobject_cast<QMenu*>(w)
 #endif
-            && w->objectName() != QLatin1String("qt_rubberband")
-            && w->objectName() != QLatin1String("qt_spinbox_lineedit"))
+            && w->objectName() != "qt_rubberband"_L1
+            && w->objectName() != "qt_spinbox_lineedit"_L1)
             widgets.append(w);
     }
     return widgets;
@@ -148,7 +150,7 @@ QString qt_accStripAmp(const QString &text)
     if (ampIndex != -1)
         newText.remove(ampIndex, 1);
 
-    return newText.replace(QLatin1String("&&"), QLatin1String("&"));
+    return newText.replace("&&"_L1, "&"_L1);
 }
 
 QString qt_accHotKey(const QString &text)
diff --git a/src/widgets/accessible/qaccessiblewidgetfactory.cpp b/src/widgets/accessible/qaccessiblewidgetfactory.cpp
index 4c6a6fdecb..dc1569cd95 100644
--- a/src/widgets/accessible/qaccessiblewidgetfactory.cpp
+++ b/src/widgets/accessible/qaccessiblewidgetfactory.cpp
@@ -60,6 +60,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QAccessibleInterface *qAccessibleFactory(const QString &classname, QObject *object)
 {
     QAccessibleInterface *iface = nullptr;
@@ -77,154 +79,154 @@ QAccessibleInterface *qAccessibleFactory(const QString &classname, QObject *obje
 
     if (false) {
 #if QT_CONFIG(lineedit)
-    } else if (classname == QLatin1String("QLineEdit")) {
-        if (widget->objectName() == QLatin1String("qt_spinbox_lineedit"))
+    } else if (classname == "QLineEdit"_L1) {
+        if (widget->objectName() == "qt_spinbox_lineedit"_L1)
             iface = nullptr;
         else
             iface = new QAccessibleLineEdit(widget);
 #endif
 #if QT_CONFIG(combobox)
-    } else if (classname == QLatin1String("QComboBox")) {
+    } else if (classname == "QComboBox"_L1) {
         iface = new QAccessibleComboBox(widget);
 #endif
 #if QT_CONFIG(spinbox)
-    } else if (classname == QLatin1String("QAbstractSpinBox")) {
+    } else if (classname == "QAbstractSpinBox"_L1) {
         iface = new QAccessibleAbstractSpinBox(widget);
-    } else if (classname == QLatin1String("QSpinBox")) {
+    } else if (classname == "QSpinBox"_L1) {
         iface = new QAccessibleSpinBox(widget);
-    } else if (classname == QLatin1String("QDoubleSpinBox")) {
+    } else if (classname == "QDoubleSpinBox"_L1) {
         iface = new QAccessibleDoubleSpinBox(widget);
 #endif
 #if QT_CONFIG(scrollbar)
-    } else if (classname == QLatin1String("QScrollBar")) {
+    } else if (classname == "QScrollBar"_L1) {
         iface = new QAccessibleScrollBar(widget);
 #endif
 #if QT_CONFIG(slider)
-    } else if (classname == QLatin1String("QAbstractSlider")) {
+    } else if (classname == "QAbstractSlider"_L1) {
         iface = new QAccessibleAbstractSlider(widget);
-    } else if (classname == QLatin1String("QSlider")) {
+    } else if (classname == "QSlider"_L1) {
         iface = new QAccessibleSlider(widget);
 #endif
 #if QT_CONFIG(toolbutton)
-    } else if (classname == QLatin1String("QToolButton")) {
+    } else if (classname == "QToolButton"_L1) {
         iface = new QAccessibleToolButton(widget);
 #endif // QT_CONFIG(toolbutton)
 #if QT_CONFIG(abstractbutton)
-    } else if (classname == QLatin1String("QCheckBox")
-            || classname == QLatin1String("QRadioButton")
-            || classname == QLatin1String("QPushButton")
-            || classname == QLatin1String("QAbstractButton")) {
+    } else if (classname == "QCheckBox"_L1
+            || classname == "QRadioButton"_L1
+            || classname == "QPushButton"_L1
+            || classname == "QAbstractButton"_L1) {
         iface = new QAccessibleButton(widget);
 #endif
-    } else if (classname == QLatin1String("QDialog")) {
+    } else if (classname == "QDialog"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::Dialog);
-    } else if (classname == QLatin1String("QMessageBox")) {
+    } else if (classname == "QMessageBox"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::AlertMessage);
 #if QT_CONFIG(mainwindow)
-    } else if (classname == QLatin1String("QMainWindow")) {
+    } else if (classname == "QMainWindow"_L1) {
         iface = new QAccessibleMainWindow(widget);
 #endif
-    } else if (classname == QLatin1String("QLabel") || classname == QLatin1String("QLCDNumber")) {
+    } else if (classname == "QLabel"_L1 || classname == "QLCDNumber"_L1) {
         iface = new QAccessibleDisplay(widget);
 #if QT_CONFIG(groupbox)
-    } else if (classname == QLatin1String("QGroupBox")) {
+    } else if (classname == "QGroupBox"_L1) {
         iface = new QAccessibleGroupBox(widget);
 #endif
-    } else if (classname == QLatin1String("QStatusBar")) {
+    } else if (classname == "QStatusBar"_L1) {
         iface = new QAccessibleDisplay(widget);
 #if QT_CONFIG(progressbar)
-    } else if (classname == QLatin1String("QProgressBar")) {
+    } else if (classname == "QProgressBar"_L1) {
         iface = new QAccessibleProgressBar(widget);
 #endif
-    } else if (classname == QLatin1String("QToolBar")) {
+    } else if (classname == "QToolBar"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::ToolBar, widget->windowTitle());
 #if QT_CONFIG(menubar)
-    } else if (classname == QLatin1String("QMenuBar")) {
+    } else if (classname == "QMenuBar"_L1) {
         iface = new QAccessibleMenuBar(widget);
 #endif
 #if QT_CONFIG(menu)
-    } else if (classname == QLatin1String("QMenu")) {
+    } else if (classname == "QMenu"_L1) {
         iface = new QAccessibleMenu(widget);
 #endif
 #if QT_CONFIG(treeview)
-    } else if (classname == QLatin1String("QTreeView")) {
+    } else if (classname == "QTreeView"_L1) {
         iface = new QAccessibleTree(widget);
 #endif // QT_CONFIG(treeview)
 #if QT_CONFIG(itemviews)
-    } else if (classname == QLatin1String("QTableView") || classname == QLatin1String("QListView")) {
+    } else if (classname == "QTableView"_L1 || classname == "QListView"_L1) {
         iface = new QAccessibleTable(widget);
     // ### This should be cleaned up. We return the parent for the scrollarea to hide it.
 #endif // QT_CONFIG(itemviews)
 #if QT_CONFIG(tabbar)
-    } else if (classname == QLatin1String("QTabBar")) {
+    } else if (classname == "QTabBar"_L1) {
         iface = new QAccessibleTabBar(widget);
 #endif
-    } else if (classname == QLatin1String("QSizeGrip")) {
+    } else if (classname == "QSizeGrip"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::Grip);
 #if QT_CONFIG(splitter)
-    } else if (classname == QLatin1String("QSplitter")) {
+    } else if (classname == "QSplitter"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::Splitter);
-    } else if (classname == QLatin1String("QSplitterHandle")) {
+    } else if (classname == "QSplitterHandle"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::Grip);
 #endif
 #if QT_CONFIG(textedit) && !defined(QT_NO_CURSOR)
-    } else if (classname == QLatin1String("QTextEdit")) {
+    } else if (classname == "QTextEdit"_L1) {
         iface = new QAccessibleTextEdit(widget);
-    } else if (classname == QLatin1String("QPlainTextEdit")) {
+    } else if (classname == "QPlainTextEdit"_L1) {
         iface = new QAccessiblePlainTextEdit(widget);
 #endif
-    } else if (classname == QLatin1String("QTipLabel")) {
+    } else if (classname == "QTipLabel"_L1) {
         iface = new QAccessibleDisplay(widget, QAccessible::ToolTip);
-    } else if (classname == QLatin1String("QFrame")) {
+    } else if (classname == "QFrame"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::Border);
 #if QT_CONFIG(stackedwidget)
-    } else if (classname == QLatin1String("QStackedWidget")) {
+    } else if (classname == "QStackedWidget"_L1) {
         iface = new QAccessibleStackedWidget(widget);
 #endif
 #if QT_CONFIG(toolbox)
-    } else if (classname == QLatin1String("QToolBox")) {
+    } else if (classname == "QToolBox"_L1) {
         iface = new QAccessibleToolBox(widget);
 #endif
 #if QT_CONFIG(mdiarea)
-    } else if (classname == QLatin1String("QMdiArea")) {
+    } else if (classname == "QMdiArea"_L1) {
         iface = new QAccessibleMdiArea(widget);
-    } else if (classname == QLatin1String("QMdiSubWindow")) {
+    } else if (classname == "QMdiSubWindow"_L1) {
         iface = new QAccessibleMdiSubWindow(widget);
 #endif
 #if QT_CONFIG(dialogbuttonbox)
-    } else if (classname == QLatin1String("QDialogButtonBox")) {
+    } else if (classname == "QDialogButtonBox"_L1) {
         iface = new QAccessibleDialogButtonBox(widget);
 #endif
 #if QT_CONFIG(dial)
-    } else if (classname == QLatin1String("QDial")) {
+    } else if (classname == "QDial"_L1) {
         iface = new QAccessibleDial(widget);
 #endif
 #if QT_CONFIG(rubberband)
-    } else if (classname == QLatin1String("QRubberBand")) {
+    } else if (classname == "QRubberBand"_L1) {
         iface = new QAccessibleWidget(widget, QAccessible::Border);
 #endif
 #if QT_CONFIG(textbrowser) && !defined(QT_NO_CURSOR)
-    } else if (classname == QLatin1String("QTextBrowser")) {
+    } else if (classname == "QTextBrowser"_L1) {
         iface = new QAccessibleTextBrowser(widget);
 #endif
 #if QT_CONFIG(scrollarea)
-    } else if (classname == QLatin1String("QAbstractScrollArea")) {
+    } else if (classname == "QAbstractScrollArea"_L1) {
         iface = new QAccessibleAbstractScrollArea(widget);
-    } else if (classname == QLatin1String("QScrollArea")) {
+    } else if (classname == "QScrollArea"_L1) {
         iface = new QAccessibleScrollArea(widget);
 #endif
 #if QT_CONFIG(calendarwidget)
-    } else if (classname == QLatin1String("QCalendarWidget")) {
+    } else if (classname == "QCalendarWidget"_L1) {
         iface = new QAccessibleCalendarWidget(widget);
 #endif
 #if QT_CONFIG(dockwidget)
-    } else if (classname == QLatin1String("QDockWidget")) {
+    } else if (classname == "QDockWidget"_L1) {
         iface = new QAccessibleDockWidget(widget);
 #endif
 
-    } else if (classname == QLatin1String("QWidget")) {
+    } else if (classname == "QWidget"_L1) {
         iface = new QAccessibleWidget(widget);
-    } else if (classname == QLatin1String("QWindowContainer")) {
+    } else if (classname == "QWindowContainer"_L1) {
         iface = new QAccessibleWindowContainer(widget);
     }
 
diff --git a/src/widgets/accessible/qaccessiblewidgets.cpp b/src/widgets/accessible/qaccessiblewidgets.cpp
index fdabc051c8..7a3a387a87 100644
--- a/src/widgets/accessible/qaccessiblewidgets.cpp
+++ b/src/widgets/accessible/qaccessiblewidgets.cpp
@@ -96,6 +96,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QString qt_accStripAmp(const QString &text);
 QString qt_accHotKey(const QString &text);
 
@@ -114,8 +116,8 @@ QList<QWidget*> childWidgets(const QWidget *widget)
 #if QT_CONFIG(menu)
               && !qobject_cast<QMenu*>(w)
 #endif
-              && objectName != QLatin1String("qt_rubberband")
-              && objectName != QLatin1String("qt_qmainwindow_extended_splitter")) {
+              && objectName != "qt_rubberband"_L1
+              && objectName != "qt_qmainwindow_extended_splitter"_L1) {
             widgets.append(w);
         }
     }
@@ -432,7 +434,7 @@ QString QAccessibleMdiSubWindow::text(QAccessible::Text textType) const
 {
     if (textType == QAccessible::Name) {
         QString title = mdiSubWindow()->windowTitle();
-        title.replace(QLatin1String("[*]"), QLatin1String(""));
+        title.replace("[*]"_L1, ""_L1);
         return title;
     }
     return QAccessibleWidget::text(textType);
@@ -570,7 +572,7 @@ QCalendarWidget *QAccessibleCalendarWidget::calendarWidget() const
 QAbstractItemView *QAccessibleCalendarWidget::calendarView() const
 {
     for (QObject *child : calendarWidget()->children()) {
-        if (child->objectName() == QLatin1String("qt_calendar_calendarview"))
+        if (child->objectName() == "qt_calendar_calendarview"_L1)
             return static_cast<QAbstractItemView *>(child);
     }
     return nullptr;
@@ -579,7 +581,7 @@ QAbstractItemView *QAccessibleCalendarWidget::calendarView() const
 QWidget *QAccessibleCalendarWidget::navigationBar() const
 {
     for (QObject *child : calendarWidget()->children()) {
-        if (child->objectName() == QLatin1String("qt_calendar_navigationbar"))
+        if (child->objectName() == "qt_calendar_navigationbar"_L1)
             return static_cast<QWidget *>(child);
     }
     return nullptr;
@@ -852,12 +854,12 @@ QString QAccessibleTextWidget::attributes(int offset, int *startOffset, int *end
     AttributeFormatter attrs;
     QString family = charFormatFont.families().value(0, QString());
     if (!family.isEmpty()) {
-        family = family.replace(u'\\', QLatin1String("\\\\"));
-        family = family.replace(u':', QLatin1String("\\:"));
-        family = family.replace(u',', QLatin1String("\\,"));
-        family = family.replace(u'=', QLatin1String("\\="));
-        family = family.replace(u';', QLatin1String("\\;"));
-        family = family.replace(u'\"', QLatin1String("\\\""));
+        family = family.replace(u'\\', "\\\\"_L1);
+        family = family.replace(u':', "\\:"_L1);
+        family = family.replace(u',', "\\,"_L1);
+        family = family.replace(u'=', "\\="_L1);
+        family = family.replace(u';', "\\;"_L1);
+        family = family.replace(u'\"', "\\\""_L1);
         attrs["font-family"] = u'"' + family + u'"';
     }
 
diff --git a/src/widgets/accessible/rangecontrols.cpp b/src/widgets/accessible/rangecontrols.cpp
index 6c12b553b4..a6a91aa245 100644
--- a/src/widgets/accessible/rangecontrols.cpp
+++ b/src/widgets/accessible/rangecontrols.cpp
@@ -65,6 +65,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #ifndef QT_NO_ACCESSIBILITY
 
 #if QT_CONFIG(spinbox)
@@ -253,7 +255,7 @@ QAccessibleSpinBox::QAccessibleSpinBox(QWidget *w)
 : QAccessibleAbstractSpinBox(w)
 {
     Q_ASSERT(spinBox());
-    addControllingSignal(QLatin1String("valueChanged(int)"));
+    addControllingSignal("valueChanged(int)"_L1);
 }
 
 /*!
@@ -270,7 +272,7 @@ QAccessibleDoubleSpinBox::QAccessibleDoubleSpinBox(QWidget *widget)
     : QAccessibleAbstractSpinBox(widget)
 {
     Q_ASSERT(qobject_cast<QDoubleSpinBox *>(widget));
-    addControllingSignal(QLatin1String("valueChanged(double)"));
+    addControllingSignal("valueChanged(double)"_L1);
 }
 
 /*!
@@ -307,7 +309,7 @@ QAccessibleScrollBar::QAccessibleScrollBar(QWidget *w)
 : QAccessibleAbstractSlider(w, QAccessible::ScrollBar)
 {
     Q_ASSERT(scrollBar());
-    addControllingSignal(QLatin1String("valueChanged(int)"));
+    addControllingSignal("valueChanged(int)"_L1);
 }
 
 /*! Returns the scroll bar. */
@@ -342,7 +344,7 @@ QAccessibleSlider::QAccessibleSlider(QWidget *w)
 : QAccessibleAbstractSlider(w)
 {
     Q_ASSERT(slider());
-    addControllingSignal(QLatin1String("valueChanged(int)"));
+    addControllingSignal("valueChanged(int)"_L1);
 }
 
 /*! Returns the slider. */
@@ -410,7 +412,7 @@ QAccessibleDial::QAccessibleDial(QWidget *widget)
     : QAccessibleAbstractSlider(widget, QAccessible::Dial)
 {
     Q_ASSERT(qobject_cast<QDial *>(widget));
-    addControllingSignal(QLatin1String("valueChanged(int)"));
+    addControllingSignal("valueChanged(int)"_L1);
 }
 
 QString QAccessibleDial::text(QAccessible::Text textType) const
diff --git a/src/widgets/accessible/simplewidgets.cpp b/src/widgets/accessible/simplewidgets.cpp
index 0d4556adc5..3aab843f64 100644
--- a/src/widgets/accessible/simplewidgets.cpp
+++ b/src/widgets/accessible/simplewidgets.cpp
@@ -93,6 +93,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #ifndef QT_NO_ACCESSIBILITY
 
 extern QList<QWidget*> childWidgets(const QWidget *widget);
@@ -120,9 +122,9 @@ QAccessibleButton::QAccessibleButton(QWidget *w)
     // FIXME: The checkable state of the button is dynamic,
     // while we only update the controlling signal once :(
     if (button()->isCheckable())
-        addControllingSignal(QLatin1String("toggled(bool)"));
+        addControllingSignal("toggled(bool)"_L1);
     else
-        addControllingSignal(QLatin1String("clicked()"));
+        addControllingSignal("clicked()"_L1);
 }
 
 /*! Returns the button. */
@@ -687,8 +689,8 @@ QStringList QAccessibleGroupBox::keyBindingsForAction(const QString &) const
 QAccessibleLineEdit::QAccessibleLineEdit(QWidget *w, const QString &name)
 : QAccessibleWidget(w, QAccessible::EditableText, name)
 {
-    addControllingSignal(QLatin1String("textChanged(const QString&)"));
-    addControllingSignal(QLatin1String("returnPressed()"));
+    addControllingSignal("textChanged(const QString&)"_L1);
+    addControllingSignal("returnPressed()"_L1);
 }
 
 /*! Returns the line edit. */
diff --git a/src/widgets/dialogs/qcolordialog.cpp b/src/widgets/dialogs/qcolordialog.cpp
index 6e39f76215..1e9147574f 100644
--- a/src/widgets/dialogs/qcolordialog.cpp
+++ b/src/widgets/dialogs/qcolordialog.cpp
@@ -82,6 +82,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 namespace {
 class QColorLuminancePicker;
 class QColorPicker;
@@ -1666,7 +1668,7 @@ void QColorDialogPrivate::releaseColorPicking()
 #endif
     q->releaseKeyboard();
     q->setMouseTracking(false);
-    lblScreenColorInfo->setText(QLatin1String("\n"));
+    lblScreenColorInfo->setText("\n"_L1);
     addCusBt->setDisabled(false);
     buttons->setDisabled(false);
     screenColorPickerButton->setDisabled(false);
@@ -1734,7 +1736,7 @@ void QColorDialogPrivate::initWidgets()
         if (supportsColorPicking()) {
             screenColorPickerButton = new QPushButton();
             leftLay->addWidget(screenColorPickerButton);
-            lblScreenColorInfo = new QLabel(QLatin1String("\n"));
+            lblScreenColorInfo = new QLabel("\n"_L1);
             leftLay->addWidget(lblScreenColorInfo);
             q->connect(screenColorPickerButton, SIGNAL(clicked()), SLOT(_q_pickScreenColor()));
         } else {
diff --git a/src/widgets/dialogs/qerrormessage.cpp b/src/widgets/dialogs/qerrormessage.cpp
index e95c92e0aa..8178b873b1 100644
--- a/src/widgets/dialogs/qerrormessage.cpp
+++ b/src/widgets/dialogs/qerrormessage.cpp
@@ -62,6 +62,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 namespace {
 struct Message {
     QString content;
@@ -188,11 +190,11 @@ static void jump(QtMsgType t, const QMessageLogContext & /*context*/, const QStr
     if (!qtMessageHandler)
         return;
 
-    QString rich = QLatin1String("<p><b>") + msgType2i18nString(t) + QLatin1String("</b></p>")
+    QString rich = "<p><b>"_L1 + msgType2i18nString(t) + "</b></p>"_L1
                    + Qt::convertFromPlainText(m, Qt::WhiteSpaceNormal);
 
     // ### work around text engine quirk
-    if (rich.endsWith(QLatin1String("</p>")))
+    if (rich.endsWith("</p>"_L1))
         rich.chop(4);
 
     if (!metFatal) {
diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index c045513341..fde7104740 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -88,6 +88,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 Q_GLOBAL_STATIC(QUrl, lastVisitedDir)
 
 /*!
@@ -1351,7 +1353,7 @@ QStringList qt_make_filter_list(const QString &filter)
     if (filter.isEmpty())
         return QStringList();
 
-    QString sep(QLatin1String(";;"));
+    QString sep(";;"_L1);
     if (!filter.contains(sep) && filter.contains(u'\n'))
         sep = u'\n';
 
@@ -1555,7 +1557,7 @@ static QString nameFilterForMime(const QString &mimeType)
             return QFileDialog::tr("All files (*)");
         } else {
             const QString patterns = mime.globPatterns().join(u' ');
-            return mime.comment() + QLatin1String(" (") + patterns + u')';
+            return mime.comment() + " ("_L1 + patterns + u')';
         }
     }
     return QString();
@@ -1898,7 +1900,7 @@ void QFileDialogComboBox::setHistory(const QStringList &paths)
     //On windows the popup display the "C:\", convert to nativeSeparators
     const QUrl url = idx.isValid()
                    ? QUrl::fromLocalFile(QDir::toNativeSeparators(idx.data(QFileSystemModel::FilePathRole).toString()))
-                   : QUrl(QLatin1String("file:"));
+                   : QUrl("file:"_L1);
     if (url.isValid())
         list.append(url);
     urlModel->setUrls(list);
@@ -2730,7 +2732,7 @@ void QFileDialog::accept()
     QString lineEditText = d->lineEdit()->text();
     // "hidden feature" type .. and then enter, and it will move up a dir
     // special case for ".."
-    if (lineEditText == QLatin1String("..")) {
+    if (lineEditText == ".."_L1) {
         d->_q_navigateToParent();
         const QSignalBlocker blocker(d->qFileDialogUi->fileNameEdit);
         d->lineEdit()->selectAll();
@@ -2821,37 +2823,37 @@ void QFileDialog::accept()
 void QFileDialogPrivate::saveSettings()
 {
     Q_Q(QFileDialog);
-    QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
-    settings.beginGroup(QLatin1String("FileDialog"));
+    QSettings settings(QSettings::UserScope, "QtProject"_L1);
+    settings.beginGroup("FileDialog"_L1);
 
     if (usingWidgets()) {
-        settings.setValue(QLatin1String("sidebarWidth"), qFileDialogUi->splitter->sizes().constFirst());
-        settings.setValue(QLatin1String("shortcuts"), QUrl::toStringList(qFileDialogUi->sidebar->urls()));
-        settings.setValue(QLatin1String("treeViewHeader"), qFileDialogUi->treeView->header()->saveState());
+        settings.setValue("sidebarWidth"_L1, qFileDialogUi->splitter->sizes().constFirst());
+        settings.setValue("shortcuts"_L1, QUrl::toStringList(qFileDialogUi->sidebar->urls()));
+        settings.setValue("treeViewHeader"_L1, qFileDialogUi->treeView->header()->saveState());
     }
     QStringList historyUrls;
     const QStringList history = q->history();
     historyUrls.reserve(history.size());
     for (const QString &path : history)
         historyUrls << QUrl::fromLocalFile(path).toString();
-    settings.setValue(QLatin1String("history"), historyUrls);
-    settings.setValue(QLatin1String("lastVisited"), lastVisitedDir()->toString());
+    settings.setValue("history"_L1, historyUrls);
+    settings.setValue("lastVisited"_L1, lastVisitedDir()->toString());
     const QMetaEnum &viewModeMeta = q->metaObject()->enumerator(q->metaObject()->indexOfEnumerator("ViewMode"));
-    settings.setValue(QLatin1String("viewMode"), QLatin1String(viewModeMeta.key(q->viewMode())));
-    settings.setValue(QLatin1String("qtVersion"), QLatin1String(QT_VERSION_STR));
+    settings.setValue("viewMode"_L1, QLatin1String(viewModeMeta.key(q->viewMode())));
+    settings.setValue("qtVersion"_L1, QT_VERSION_STR ""_L1);
 }
 
 bool QFileDialogPrivate::restoreFromSettings()
 {
     Q_Q(QFileDialog);
-    QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
-    if (!settings.childGroups().contains(QLatin1String("FileDialog")))
+    QSettings settings(QSettings::UserScope, "QtProject"_L1);
+    if (!settings.childGroups().contains("FileDialog"_L1))
         return false;
-    settings.beginGroup(QLatin1String("FileDialog"));
+    settings.beginGroup("FileDialog"_L1);
 
-    q->setDirectoryUrl(lastVisitedDir()->isEmpty() ? settings.value(QLatin1String("lastVisited")).toUrl() : *lastVisitedDir());
+    q->setDirectoryUrl(lastVisitedDir()->isEmpty() ? settings.value("lastVisited"_L1).toUrl() : *lastVisitedDir());
 
-    QByteArray viewModeStr = settings.value(QLatin1String("viewMode")).toString().toLatin1();
+    QByteArray viewModeStr = settings.value("viewMode"_L1).toString().toLatin1();
     const QMetaEnum &viewModeMeta = q->metaObject()->enumerator(q->metaObject()->indexOfEnumerator("ViewMode"));
     bool ok = false;
     int viewMode = viewModeMeta.keyToValue(viewModeStr.constData(), &ok);
@@ -2859,21 +2861,21 @@ bool QFileDialogPrivate::restoreFromSettings()
         viewMode = QFileDialog::List;
     q->setViewMode(static_cast<QFileDialog::ViewMode>(viewMode));
 
-    sidebarUrls = QUrl::fromStringList(settings.value(QLatin1String("shortcuts")).toStringList());
-    headerData = settings.value(QLatin1String("treeViewHeader")).toByteArray();
+    sidebarUrls = QUrl::fromStringList(settings.value("shortcuts"_L1).toStringList());
+    headerData = settings.value("treeViewHeader"_L1).toByteArray();
 
     if (!usingWidgets())
         return true;
 
     QStringList history;
-    const auto urlStrings = settings.value(QLatin1String("history")).toStringList();
+    const auto urlStrings = settings.value("history"_L1).toStringList();
     for (const QString &urlStr : urlStrings) {
         QUrl url(urlStr);
         if (url.isLocalFile())
             history << url.toLocalFile();
     }
 
-    return restoreWidgetState(history, settings.value(QLatin1String("sidebarWidth"), -1).toInt());
+    return restoreWidgetState(history, settings.value("sidebarWidth"_L1, -1).toInt());
 }
 #endif // settings
 
@@ -2955,8 +2957,8 @@ void QFileDialogPrivate::init(const QFileDialogArgs &args)
     // Try to restore from the FileDialog settings group; if it fails, fall back
     // to the pre-5.5 QByteArray serialized settings.
     if (!restoreFromSettings()) {
-        const QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
-        q->restoreState(settings.value(QLatin1String("Qt/filedialog")).toByteArray());
+        const QSettings settings(QSettings::UserScope, "QtProject"_L1);
+        q->restoreState(settings.value("Qt/filedialog"_L1).toByteArray());
     }
 #endif
 
@@ -2992,7 +2994,7 @@ void QFileDialogPrivate::createWidgets()
     model = new QFileSystemModel(q);
     model->setIconProvider(&defaultIconProvider);
     model->setFilter(options->filter());
-    model->setObjectName(QLatin1String("qt_filesystem_model"));
+    model->setObjectName("qt_filesystem_model"_L1);
     if (QPlatformFileDialogHelper *helper = platformFileDialogHelper())
         model->setNameFilterDisables(helper->defaultNameFilterDisables());
     else
@@ -3011,7 +3013,7 @@ void QFileDialogPrivate::createWidgets()
     qFileDialogUi->setupUi(q);
 
     QList<QUrl> initialBookmarks;
-    initialBookmarks << QUrl(QLatin1String("file:"))
+    initialBookmarks << QUrl("file:"_L1)
                      << QUrl::fromLocalFile(QDir::homePath());
     qFileDialogUi->sidebar->setModelAndUrls(model, initialBookmarks);
     QFileDialog::connect(qFileDialogUi->sidebar, SIGNAL(goToUrl(QUrl)),
@@ -3069,10 +3071,10 @@ void QFileDialogPrivate::createWidgets()
     qFileDialogUi->treeView->setModel(model);
     QHeaderView *treeHeader = qFileDialogUi->treeView->header();
     QFontMetrics fm(q->font());
-    treeHeader->resizeSection(0, fm.horizontalAdvance(QLatin1String("wwwwwwwwwwwwwwwwwwwwwwwwww")));
-    treeHeader->resizeSection(1, fm.horizontalAdvance(QLatin1String("128.88 GB")));
-    treeHeader->resizeSection(2, fm.horizontalAdvance(QLatin1String("mp3Folder")));
-    treeHeader->resizeSection(3, fm.horizontalAdvance(QLatin1String("10/29/81 02:02PM")));
+    treeHeader->resizeSection(0, fm.horizontalAdvance("wwwwwwwwwwwwwwwwwwwwwwwwww"_L1));
+    treeHeader->resizeSection(1, fm.horizontalAdvance("128.88 GB"_L1));
+    treeHeader->resizeSection(2, fm.horizontalAdvance("mp3Folder"_L1));
+    treeHeader->resizeSection(3, fm.horizontalAdvance("10/29/81 02:02PM"_L1));
     treeHeader->setContextMenuPolicy(Qt::ActionsContextMenu);
 
     QActionGroup *showActionGroup = new QActionGroup(q);
@@ -3119,8 +3121,8 @@ void QFileDialogPrivate::createWidgets()
     // Try to restore from the FileDialog settings group; if it fails, fall back
     // to the pre-5.5 QByteArray serialized settings.
     if (!restoreFromSettings()) {
-        const QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
-        q->restoreState(settings.value(QLatin1String("Qt/filedialog")).toByteArray());
+        const QSettings settings(QSettings::UserScope, "QtProject"_L1);
+        q->restoreState(settings.value("Qt/filedialog"_L1).toByteArray());
     }
 #endif
 
@@ -3306,7 +3308,7 @@ void QFileDialogPrivate::createMenuActions()
     // ### TODO add Desktop & Computer actions
 
     QAction *goToParent =  new QAction(q);
-    goToParent->setObjectName(QLatin1String("qt_goto_parent_action"));
+    goToParent->setObjectName("qt_goto_parent_action"_L1);
 #ifndef QT_NO_SHORTCUT
     goToParent->setShortcut(Qt::CTRL | Qt::Key_Up);
 #endif
@@ -3315,21 +3317,21 @@ void QFileDialogPrivate::createMenuActions()
 
     renameAction = new QAction(q);
     renameAction->setEnabled(false);
-    renameAction->setObjectName(QLatin1String("qt_rename_action"));
+    renameAction->setObjectName("qt_rename_action"_L1);
     QObject::connect(renameAction, SIGNAL(triggered()), q, SLOT(_q_renameCurrent()));
 
     deleteAction = new QAction(q);
     deleteAction->setEnabled(false);
-    deleteAction->setObjectName(QLatin1String("qt_delete_action"));
+    deleteAction->setObjectName("qt_delete_action"_L1);
     QObject::connect(deleteAction, SIGNAL(triggered()), q, SLOT(_q_deleteCurrent()));
 
     showHiddenAction = new QAction(q);
-    showHiddenAction->setObjectName(QLatin1String("qt_show_hidden_action"));
+    showHiddenAction->setObjectName("qt_show_hidden_action"_L1);
     showHiddenAction->setCheckable(true);
     QObject::connect(showHiddenAction, SIGNAL(triggered()), q, SLOT(_q_showHidden()));
 
     newFolderAction = new QAction(q);
-    newFolderAction->setObjectName(QLatin1String("qt_new_folder_action"));
+    newFolderAction->setObjectName("qt_new_folder_action"_L1);
     QObject::connect(newFolderAction, SIGNAL(triggered()), q, SLOT(_q_createDirectory()));
 }
 
@@ -3625,7 +3627,7 @@ void QFileDialogPrivate::_q_deleteCurrent()
 
 void QFileDialogPrivate::_q_autoCompleteFileName(const QString &text)
 {
-    if (text.startsWith(QLatin1String("//")) || text.startsWith(u'\\')) {
+    if (text.startsWith("//"_L1) || text.startsWith(u'\\')) {
         qFileDialogUi->listView->selectionModel()->clearSelection();
         return;
     }
@@ -3667,7 +3669,7 @@ void QFileDialogPrivate::_q_updateOkButton()
     const QStringList files = q->selectedFiles();
     QString lineEditText = lineEdit()->text();
 
-    if (lineEditText.startsWith(QLatin1String("//")) || lineEditText.startsWith(u'\\')) {
+    if (lineEditText.startsWith("//"_L1) || lineEditText.startsWith(u'\\')) {
         button->setEnabled(true);
         updateOkButtonText();
         return;
@@ -3675,7 +3677,7 @@ void QFileDialogPrivate::_q_updateOkButton()
 
     if (files.isEmpty()) {
         enableButton = false;
-    } else if (lineEditText == QLatin1String("..")) {
+    } else if (lineEditText == ".."_L1) {
         isOpenDirectory = true;
     } else {
         switch (fileMode) {
@@ -3700,7 +3702,7 @@ void QFileDialogPrivate::_q_updateOkButton()
                 fileDir = fn.mid(0, fn.lastIndexOf(u'/'));
                 fileName = fn.mid(fileDir.length() + 1);
             }
-            if (lineEditText.contains(QLatin1String(".."))) {
+            if (lineEditText.contains(".."_L1)) {
                 fileDir = info.canonicalFilePath();
                 fileName = info.fileName();
             }
@@ -4037,7 +4039,7 @@ void QFileDialogComboBox::showPopup()
         idx = idx.parent();
     }
     // add "my computer"
-    list.append(QUrl(QLatin1String("file:")));
+    list.append(QUrl("file:"_L1));
     urlModel->addUrls(list, 0);
     idx = model()->index(model()->rowCount() - 1, 0);
 
@@ -4212,9 +4214,9 @@ QStringList QFSCompleter::splitPath(const QString &path) const
     QString pathCopy = QDir::toNativeSeparators(path);
     QChar sep = QDir::separator();
 #if defined(Q_OS_WIN)
-    if (pathCopy == QLatin1String("\\") || pathCopy == QLatin1String("\\\\"))
+    if (pathCopy == "\\"_L1 || pathCopy == "\\\\"_L1)
         return QStringList(pathCopy);
-    QString doubleSlash(QLatin1String("\\\\"));
+    QString doubleSlash("\\\\"_L1);
     if (pathCopy.startsWith(doubleSlash))
         pathCopy = pathCopy.mid(2);
     else
@@ -4264,9 +4266,7 @@ QStringList QFSCompleter::splitPath(const QString &path) const
 #endif
         if (currentLocation.contains(sep) && path != currentLocation) {
             QStringList currentLocationList = splitPath(currentLocation);
-            while (!currentLocationList.isEmpty()
-                   && parts.count() > 0
-                   && parts.at(0) == QLatin1String("..")) {
+            while (!currentLocationList.isEmpty() && parts.count() > 0 && parts.at(0) == ".."_L1) {
                 parts.removeFirst();
                 currentLocationList.removeLast();
             }
diff --git a/src/widgets/dialogs/qfontdialog.cpp b/src/widgets/dialogs/qfontdialog.cpp
index f1c844df5e..21055cb886 100644
--- a/src/widgets/dialogs/qfontdialog.cpp
+++ b/src/widgets/dialogs/qfontdialog.cpp
@@ -63,6 +63,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QFontListView : public QListView
 {
     Q_OBJECT
@@ -228,7 +230,7 @@ void QFontDialogPrivate::init()
     sampleEdit->setAlignment(Qt::AlignCenter);
     // Note that the sample text is *not* translated with tr(), as the
     // characters used depend on the charset encoding.
-    sampleEdit->setText(QLatin1String("AaBbYyZz"));
+    sampleEdit->setText("AaBbYyZz"_L1);
     hbox->addWidget(sampleEdit);
 
     writingSystemCombo = new QComboBox(q);
@@ -326,7 +328,7 @@ void QFontDialogPrivate::init()
 
     familyList->setFocus();
     retranslateStrings();
-    sampleEdit->setObjectName(QLatin1String("qt_fontDialog_sampleEdit"));
+    sampleEdit->setObjectName("qt_fontDialog_sampleEdit"_L1);
 }
 
 /*!
@@ -583,20 +585,20 @@ void QFontDialogPrivate::updateStyles()
                  }
             }
             if (!found && first) {
-                if (cstyle.contains(QLatin1String("Italic"))) {
-                    cstyle.replace(QLatin1String("Italic"), QLatin1String("Oblique"));
+                if (cstyle.contains("Italic"_L1)) {
+                    cstyle.replace("Italic"_L1, "Oblique"_L1);
                     first = false;
                     goto redo;
-                } else if (cstyle.contains(QLatin1String("Oblique"))) {
-                    cstyle.replace(QLatin1String("Oblique"), QLatin1String("Italic"));
+                } else if (cstyle.contains("Oblique"_L1)) {
+                    cstyle.replace("Oblique"_L1, "Italic"_L1);
                     first = false;
                     goto redo;
-                } else if (cstyle.contains(QLatin1String("Regular"))) {
-                    cstyle.replace(QLatin1String("Regular"), QLatin1String("Normal"));
+                } else if (cstyle.contains("Regular"_L1)) {
+                    cstyle.replace("Regular"_L1, "Normal"_L1);
                     first = false;
                     goto redo;
-                } else if (cstyle.contains(QLatin1String("Normal"))) {
-                    cstyle.replace(QLatin1String("Normal"), QLatin1String("Regular"));
+                } else if (cstyle.contains("Normal"_L1)) {
+                    cstyle.replace("Normal"_L1, "Regular"_L1);
                     first = false;
                     goto redo;
                 }
diff --git a/src/widgets/dialogs/qmessagebox.cpp b/src/widgets/dialogs/qmessagebox.cpp
index ab12a9b2ee..a6707fa0d5 100644
--- a/src/widgets/dialogs/qmessagebox.cpp
+++ b/src/widgets/dialogs/qmessagebox.cpp
@@ -72,6 +72,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #if defined(Q_OS_WIN)
 HMENU qt_getWindowsSystemMenu(const QWidget *w)
 {
@@ -270,16 +272,16 @@ void QMessageBoxPrivate::init(const QString &title, const QString &text)
     Q_Q(QMessageBox);
 
     label = new QLabel;
-    label->setObjectName(QLatin1String("qt_msgbox_label"));
+    label->setObjectName("qt_msgbox_label"_L1);
     label->setTextInteractionFlags(Qt::TextInteractionFlags(q->style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, nullptr, q)));
     label->setAlignment(Qt::AlignVCenter | Qt::AlignLeft);
     label->setOpenExternalLinks(true);
     iconLabel = new QLabel(q);
-    iconLabel->setObjectName(QLatin1String("qt_msgboxex_icon_label"));
+    iconLabel->setObjectName("qt_msgboxex_icon_label"_L1);
     iconLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 
     buttonBox = new QDialogButtonBox;
-    buttonBox->setObjectName(QLatin1String("qt_msgbox_buttonbox"));
+    buttonBox->setObjectName("qt_msgbox_buttonbox"_L1);
     buttonBox->setCenterButtons(q->style()->styleHint(QStyle::SH_MessageBox_CenterButtons, nullptr, q));
     QObject::connect(buttonBox, SIGNAL(clicked(QAbstractButton*)),
                      q, SLOT(_q_buttonClicked(QAbstractButton*)));
@@ -1495,7 +1497,7 @@ void QMessageBox::keyPressEvent(QKeyEvent *e)
 
 #if defined(Q_OS_WIN)
         if (e == QKeySequence::Copy) {
-            const QLatin1String separator("---------------------------\n");
+            const auto separator = "---------------------------\n"_L1;
             QString textToCopy;
             textToCopy += separator + windowTitle() + u'\n' + separator // title
                           + d->label->text() + u'\n' + separator;       // text
@@ -1505,7 +1507,7 @@ void QMessageBox::keyPressEvent(QKeyEvent *e)
 
             const QList<QAbstractButton *> buttons = d->buttonBox->buttons();
             for (const auto *button : buttons)
-                textToCopy += button->text() + QLatin1String("   ");
+                textToCopy += button->text() + "   "_L1;
             textToCopy += u'\n' + separator;
 #if QT_CONFIG(textedit)
             if (d->detailsText)
@@ -1870,7 +1872,7 @@ void QMessageBox::aboutQt(QWidget *parent, const QString &title)
     translatedTextAboutQtCaption = QMessageBox::tr(
         "<h3>About Qt</h3>"
         "<p>This program uses Qt version %1.</p>"
-        ).arg(QLatin1String(QT_VERSION_STR));
+        ).arg(QT_VERSION_STR ""_L1);
     //: Leave this text untranslated or include a verbatim copy of it below
     //: and note that it is the authoritative version in case of doubt.
     const QString translatedTextAboutQtText = QMessageBox::tr(
@@ -1904,7 +1906,7 @@ void QMessageBox::aboutQt(QWidget *parent, const QString &title)
     msgBox->setText(translatedTextAboutQtCaption);
     msgBox->setInformativeText(translatedTextAboutQtText);
 
-    QPixmap pm(QLatin1String(":/qt-project.org/qmessagebox/images/qtlogo-64.png"));
+    QPixmap pm(":/qt-project.org/qmessagebox/images/qtlogo-64.png"_L1);
     if (!pm.isNull())
         msgBox->setIconPixmap(pm);
 
@@ -2565,7 +2567,7 @@ void QMessageBox::setInformativeText(const QString &text)
     } else {
         if (!d->informativeLabel) {
             QLabel *label = new QLabel;
-            label->setObjectName(QLatin1String("qt_msgbox_informativelabel"));
+            label->setObjectName("qt_msgbox_informativelabel"_L1);
             label->setTextInteractionFlags(Qt::TextInteractionFlags(style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, nullptr, this)));
             label->setAlignment(Qt::AlignTop | Qt::AlignLeft);
             label->setOpenExternalLinks(true);
diff --git a/src/widgets/dialogs/qsidebar.cpp b/src/widgets/dialogs/qsidebar.cpp
index 296542a187..788b1fb6cf 100644
--- a/src/widgets/dialogs/qsidebar.cpp
+++ b/src/widgets/dialogs/qsidebar.cpp
@@ -53,6 +53,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 void QSideBarDelegate::initStyleOption(QStyleOptionViewItem *option,
                                          const QModelIndex &index) const
 {
@@ -82,7 +84,7 @@ QUrlModel::QUrlModel(QObject *parent) : QStandardItemModel(parent), showFullPath
 */
 QStringList QUrlModel::mimeTypes() const
 {
-    return QStringList(QLatin1String("text/uri-list"));
+    return QStringList("text/uri-list"_L1);
 }
 
 /*!
@@ -247,7 +249,7 @@ void QUrlModel::addUrls(const QList<QUrl> &list, int row, bool move)
     row = qMin(row, rowCount());
     for (int i = list.count() - 1; i >= 0; --i) {
         QUrl url = list.at(i);
-        if (!url.isValid() || url.scheme() != QLatin1String("file"))
+        if (!url.isValid() || url.scheme() != "file"_L1)
             continue;
         //this makes sure the url is clean
         const QString cleanUrl = QDir::cleanPath(url.toLocalFile());
diff --git a/src/widgets/dialogs/qwizard.cpp b/src/widgets/dialogs/qwizard.cpp
index 7e476eb4ec..2d5ae19742 100644
--- a/src/widgets/dialogs/qwizard.cpp
+++ b/src/widgets/dialogs/qwizard.cpp
@@ -81,6 +81,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 // These fudge terms were needed a few places to obtain pixel-perfect results
 const int GapBetweenLogoAndRightEdge = 5;
 const int ModernHeaderTopMargin = 2;
@@ -383,7 +385,7 @@ void QWizardHeader::setup(const QWizardLayoutInfo &info, const QString &title,
     logoLabel->setPixmap(logo);
 
     subTitleLabel->setTextFormat(subTitleFormat);
-    subTitleLabel->setText(QLatin1String("Pq\nPq"));
+    subTitleLabel->setText("Pq\nPq"_L1);
     int desiredSubTitleHeight = subTitleLabel->sizeHint().height();
     subTitleLabel->setText(subTitle);
 
@@ -1049,7 +1051,7 @@ void QWizardPrivate::recreateLayout(const QWizardLayoutInfo &info)
 
         if (aero) {
             // ### hardcoded for now:
-            titleFont = QFont(QLatin1String("Segoe UI"), 12);
+            titleFont = QFont("Segoe UI"_L1, 12);
             QPalette pal(titleLabel->palette());
             pal.setColor(QPalette::Text, QColor(0x00, 0x33, 0x99));
             titleLabel->setPalette(pal);
@@ -1365,11 +1367,11 @@ static QString object_name_for_button(QWizard::WizardButton which)
 {
     switch (which) {
     case QWizard::CommitButton:
-        return QLatin1String("qt_wizard_") + QLatin1String("commit");
+        return "qt_wizard_commit"_L1;
     case QWizard::FinishButton:
-        return QLatin1String("qt_wizard_") + QLatin1String("finish");
+        return "qt_wizard_finish"_L1;
     case QWizard::CancelButton:
-        return QLatin1String("qt_wizard_") + QLatin1String("cancel");
+        return "qt_wizard_cancel"_L1;
     case QWizard::BackButton:
     case QWizard::NextButton:
     case QWizard::HelpButton:
@@ -1377,7 +1379,7 @@ static QString object_name_for_button(QWizard::WizardButton which)
     case QWizard::CustomButton2:
     case QWizard::CustomButton3:
         // Make navigation buttons detectable as passive interactor in designer
-        return QLatin1String("__qt__passive_wizardbutton") + QString::number(which);
+        return "__qt__passive_wizardbutton"_L1 + QString::number(which);
     case QWizard::Stretch:
     case QWizard::NoButton:
     //case QWizard::NStandardButtons:
diff --git a/src/widgets/doc/snippets/styles/qcustompixmapstyle.cpp b/src/widgets/doc/snippets/styles/qcustompixmapstyle.cpp
index e1233a3afd..1fff87f8f2 100644
--- a/src/widgets/doc/snippets/styles/qcustompixmapstyle.cpp
+++ b/src/widgets/doc/snippets/styles/qcustompixmapstyle.cpp
@@ -41,42 +41,44 @@
 
 #include <QtGui>
 
+using namespace Qt::StringLiterals;
+
 //! [0]
 QCustomPixmapStyle::QCustomPixmapStyle() :
     QPixmapStyle()
 {
 //! [1]
     addDescriptor(PB_Enabled,
-                  QLatin1String("://button/core_button_inactive.png"),
+                  "://button/core_button_inactive.png"_L1,
                   QMargins(13, 13, 13, 13),
                   QTileRules(Qt::RepeatTile, Qt::StretchTile));
 //! [1]
     addDescriptor(PB_Checked,
-                  QLatin1String("://button/core_button_enabled_selected.png"),
+                  "://button/core_button_enabled_selected.png"_L1,
                   QMargins(13, 13, 13, 13),
                   QTileRules(Qt::RepeatTile, Qt::StretchTile));
     addDescriptor(PB_Pressed,
-                  QLatin1String("://button/core_button_pressed.png"),
+                  "://button/core_button_pressed.png"_L1,
                   QMargins(13, 13, 13, 13),
                   QTileRules(Qt::RepeatTile, Qt::StretchTile));
     addDescriptor(PB_Disabled,
-                  QLatin1String("://button/core_button_disabled.png"),
+                  "://button/core_button_disabled.png"_L1,
                   QMargins(13, 13, 13, 13),
                   QTileRules(Qt::RepeatTile, Qt::StretchTile));
     addDescriptor(PB_PressedDisabled,
-                  QLatin1String("://button/core_button_disabled_selected.png"),
+                  "://button/core_button_disabled_selected.png"_L1,
                   QMargins(13, 13, 13, 13),
                   QTileRules(Qt::RepeatTile, Qt::StretchTile));
 
 //! [2]
     addDescriptor(LE_Enabled,
-                  QLatin1String("://lineedit/core_textinput_bg.png"),
+                  "://lineedit/core_textinput_bg.png"_L1,
                   QMargins(8, 8, 8, 8));
     addDescriptor(LE_Disabled,
-                  QLatin1String("://lineedit/core_textinput_bg_disabled.png"),
+                  "://lineedit/core_textinput_bg_disabled.png"_L1,
                   QMargins(8, 8, 8, 8));
     addDescriptor(LE_Focused,
-                  QLatin1String("://lineedit/core_textinput_bg_highlight.png"),
+                  "://lineedit/core_textinput_bg_highlight.png"_L1,
                   QMargins(8, 8, 8, 8));
 
     copyDescriptor(LE_Enabled, TE_Enabled);
diff --git a/src/widgets/graphicsview/qgraphicsanchorlayout_p.cpp b/src/widgets/graphicsview/qgraphicsanchorlayout_p.cpp
index 232599c561..9e4a7d4041 100644
--- a/src/widgets/graphicsview/qgraphicsanchorlayout_p.cpp
+++ b/src/widgets/graphicsview/qgraphicsanchorlayout_p.cpp
@@ -51,6 +51,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 // To ensure that all variables inside the simplex solver are non-negative,
 // we limit the size of anchors in the interval [-limit, limit]. Then before
 // sending them to the simplex solver we add "limit" as an offset, so that
@@ -609,7 +611,7 @@ QSimplexConstraint *GraphPath::constraint(const GraphPath &path) const
 #ifdef QT_DEBUG
 QString GraphPath::toString() const
 {
-    QString string(QLatin1String("Path: "));
+    QString string("Path: "_L1);
     for (AnchorData *edge : positives)
         string += QString::fromLatin1(" (+++) %1").arg(edge->toString());
 
diff --git a/src/widgets/graphicsview/qgraphicsanchorlayout_p.h b/src/widgets/graphicsview/qgraphicsanchorlayout_p.h
index 9fa14a3f90..f6373aad12 100644
--- a/src/widgets/graphicsview/qgraphicsanchorlayout_p.h
+++ b/src/widgets/graphicsview/qgraphicsanchorlayout_p.h
@@ -269,42 +269,44 @@ struct AnchorVertexPair : public AnchorVertex {
 #ifdef QT_DEBUG
 inline QString AnchorVertex::toString() const
 {
+    using namespace Qt::StringLiterals;
+
     if (!m_item)
         return QString::fromLatin1("NULL_%1").arg(quintptr(this));
 
     QString edge;
     switch (m_edge) {
     case Qt::AnchorLeft:
-        edge = QLatin1String("Left");
+        edge = "Left"_L1;
         break;
     case Qt::AnchorHorizontalCenter:
-        edge = QLatin1String("HorizontalCenter");
+        edge = "HorizontalCenter"_L1;
         break;
     case Qt::AnchorRight:
-        edge = QLatin1String("Right");
+        edge = "Right"_L1;
         break;
     case Qt::AnchorTop:
-        edge = QLatin1String("Top");
+        edge = "Top"_L1;
         break;
     case Qt::AnchorVerticalCenter:
-        edge = QLatin1String("VerticalCenter");
+        edge = "VerticalCenter"_L1;
         break;
     case Qt::AnchorBottom:
-        edge = QLatin1String("Bottom");
+        edge = "Bottom"_L1;
         break;
     default:
-        edge = QLatin1String("None");
+        edge = "None"_L1;
         break;
     }
     QString itemName;
     if (m_item->isLayout()) {
-        itemName = QLatin1String("layout");
+        itemName = "layout"_L1;
     } else {
         if (QGraphicsItem *item = m_item->graphicsItem()) {
             itemName = item->data(0).toString();
         }
     }
-    edge.insert(0, QLatin1String("%1_"));
+    edge.insert(0, "%1_"_L1);
     return edge.arg(itemName);
 }
 #endif
diff --git a/src/widgets/graphicsview/qgraphicswidget.cpp b/src/widgets/graphicsview/qgraphicswidget.cpp
index c857d5dc5a..e7b41fed50 100644
--- a/src/widgets/graphicsview/qgraphicswidget.cpp
+++ b/src/widgets/graphicsview/qgraphicswidget.cpp
@@ -67,6 +67,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     \class QGraphicsWidget
     \brief The QGraphicsWidget class is the base class for all widget
@@ -2401,7 +2403,7 @@ void QGraphicsWidget::dumpFocusChain()
             qWarning("Found a focus chain that is not circular, (next == 0)");
             break;
         }
-        qDebug() << i++ << QString::number(uint(next), 16) << next->className() << next->data(0) << QString::fromLatin1("focusItem:%1").arg(next->hasFocus() ? '1' : '0') << QLatin1String("next:") << next->d_func()->focusNext->data(0) << QLatin1String("prev:") << next->d_func()->focusPrev->data(0);
+        qDebug() << i++ << QString::number(uint(next), 16) << next->className() << next->data(0) << QString::fromLatin1("focusItem:%1").arg(next->hasFocus() ? '1' : '0') << "next:"_L1 << next->d_func()->focusNext->data(0) << "prev:"_L1 << next->d_func()->focusPrev->data(0);
         if (visited.contains(next)) {
             qWarning("Already visited this node. However, I expected to dump until I found myself.");
             break;
diff --git a/src/widgets/graphicsview/qsimplex_p.cpp b/src/widgets/graphicsview/qsimplex_p.cpp
index b9f7275d00..b2a2fad697 100644
--- a/src/widgets/graphicsview/qsimplex_p.cpp
+++ b/src/widgets/graphicsview/qsimplex_p.cpp
@@ -46,6 +46,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
   \internal
   \class QSimplex
@@ -354,7 +356,7 @@ void QSimplex::dumpMatrix()
 {
     qDebug("---- Simplex Matrix ----\n");
 
-    QString str(QLatin1String("       "));
+    QString str("       "_L1);
     for (int j = 0; j < columns; ++j)
         str += QString::fromLatin1("  <%1 >").arg(j, 2);
     qDebug("%s", qPrintable(str));
diff --git a/src/widgets/kernel/qapplication.cpp b/src/widgets/kernel/qapplication.cpp
index 91c08de41f..9cc7cccdcf 100644
--- a/src/widgets/kernel/qapplication.cpp
+++ b/src/widgets/kernel/qapplication.cpp
@@ -132,6 +132,8 @@ static void initResources()
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 // Helper macro for static functions to check on the existence of the application class.
 #define CHECK_QAPP_INSTANCE(...) \
     if (Q_LIKELY(QCoreApplication::instance())) { \
@@ -411,10 +413,10 @@ void QApplicationPrivate::process_cmdline()
             // obsolete argument
 #ifndef QT_NO_STYLE_STYLESHEET
         } else if (strcmp(arg, "-stylesheet") == 0 && i < argc -1) {
-            styleSheet = QLatin1String("file:///");
+            styleSheet = "file:///"_L1;
             styleSheet.append(QString::fromLocal8Bit(argv[++i]));
         } else if (strncmp(arg, "-stylesheet=", 12) == 0) {
-            styleSheet = QLatin1String("file:///");
+            styleSheet = "file:///"_L1;
             styleSheet.append(QString::fromLocal8Bit(arg + 12));
 #endif
         } else if (qstrcmp(arg, "-widgetcount") == 0) {
@@ -551,7 +553,7 @@ void QApplicationPrivate::initialize()
             } else {
                 qWarning("QApplication: invalid style override '%s' passed, ignoring it.\n"
                     "\tAvailable styles: %s", qPrintable(styleOverride),
-                    qPrintable(QStyleFactory::keys().join(QLatin1String(", "))));
+                    qPrintable(QStyleFactory::keys().join(", "_L1)));
             }
         }
 
diff --git a/src/widgets/kernel/qtooltip.cpp b/src/widgets/kernel/qtooltip.cpp
index 49de9e0c6a..3cfd7aa68c 100644
--- a/src/widgets/kernel/qtooltip.cpp
+++ b/src/widgets/kernel/qtooltip.cpp
@@ -62,6 +62,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     \class QToolTip
 
@@ -372,7 +374,7 @@ void QTipLabel::placeTip(const QPoint &pos, QWidget *w)
         //the stylesheet need to know the real parent
         QTipLabel::instance->setProperty("_q_stylesheet_parent", QVariant::fromValue(w));
         //we force the style to be the QStyleSheetStyle, and force to clear the cache as well.
-        QTipLabel::instance->setStyleSheet(QLatin1String("/* */"));
+        QTipLabel::instance->setStyleSheet("/* */"_L1);
 
         // Set up for cleaning up this later...
         QTipLabel::instance->styleSheetParent = w;
@@ -492,7 +494,7 @@ void QToolTip::showText(const QPoint &pos, const QString &text, QWidget *w, cons
         QWidgetPrivate::get(QTipLabel::instance)->setScreen(QTipLabel::getTipScreen(pos, w));
         QTipLabel::instance->setTipRect(w, rect);
         QTipLabel::instance->placeTip(pos, w);
-        QTipLabel::instance->setObjectName(QLatin1String("qtooltip_label"));
+        QTipLabel::instance->setObjectName("qtooltip_label"_L1);
 
 #if QT_CONFIG(effects)
         if (QApplication::isEffectEnabled(Qt::UI_FadeTooltip))
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 2adbffa99b..d3a742acea 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -119,6 +119,7 @@
 QT_BEGIN_NAMESPACE
 
 using namespace QNativeInterface::Private;
+using namespace Qt::StringLiterals;
 
 Q_LOGGING_CATEGORY(lcWidgetPainting, "qt.widgets.painting", QtWarningMsg);
 
@@ -6021,7 +6022,7 @@ QString QWidget::windowTitle() const
         if (!d->extra->topextra->caption.isEmpty())
             return d->extra->topextra->caption;
         if (!d->extra->topextra->filePath.isEmpty())
-            return QFileInfo(d->extra->topextra->filePath).fileName() + QLatin1String("[*]");
+            return QFileInfo(d->extra->topextra->filePath).fileName() + "[*]"_L1;
     }
     return QString();
 }
@@ -6045,7 +6046,7 @@ QString qt_setWindowTitle_helperHelper(const QString &title, const QWidget *widg
     if (cap.isEmpty())
         return cap;
 
-    QLatin1String placeHolder("[*]");
+    const auto placeHolder = "[*]"_L1;
     int index = cap.indexOf(placeHolder);
 
     // here the magic begins
@@ -6069,7 +6070,7 @@ QString qt_setWindowTitle_helperHelper(const QString &title, const QWidget *widg
         index = cap.indexOf(placeHolder, index);
     }
 
-    cap.replace(QLatin1String("[*][*]"), placeHolder);
+    cap.replace("[*][*]"_L1, placeHolder);
 
     return cap;
 }
@@ -11456,7 +11457,7 @@ void QWidgetPrivate::setWindowModified_helper()
         return;
     bool on = q->testAttribute(Qt::WA_WindowModified);
     if (!platformWindow->setWindowModified(on)) {
-        if (Q_UNLIKELY(on && !q->windowTitle().contains(QLatin1String("[*]"))))
+        if (Q_UNLIKELY(on && !q->windowTitle().contains("[*]"_L1)))
             qWarning("QWidget::setWindowModified: The window title does not contain a '[*]' placeholder");
         setWindowTitle_helper(q->windowTitle());
         setWindowIconText_helper(q->windowIconText());
diff --git a/src/widgets/kernel/qwidgetwindow.cpp b/src/widgets/kernel/qwidgetwindow.cpp
index 6524393ee1..3b32268c06 100644
--- a/src/widgets/kernel/qwidgetwindow.cpp
+++ b/src/widgets/kernel/qwidgetwindow.cpp
@@ -55,6 +55,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 Q_WIDGETS_EXPORT extern bool qt_tab_all_widgets();
 
 Q_WIDGETS_EXPORT QWidget *qt_button_down = nullptr; // widget got last button-down
@@ -1159,8 +1161,8 @@ void QWidgetWindow::updateObjectName()
 {
     QString name = m_widget->objectName();
     if (name.isEmpty())
-        name = QString::fromUtf8(m_widget->metaObject()->className()) + QLatin1String("Class");
-    name += QLatin1String("Window");
+        name = QString::fromUtf8(m_widget->metaObject()->className()) + "Class"_L1;
+    name += "Window"_L1;
     setObjectName(name);
 }
 
diff --git a/src/widgets/kernel/qwindowcontainer.cpp b/src/widgets/kernel/qwindowcontainer.cpp
index b26bc68d19..adeebc52dc 100644
--- a/src/widgets/kernel/qwindowcontainer.cpp
+++ b/src/widgets/kernel/qwindowcontainer.cpp
@@ -52,6 +52,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QWindowContainerPrivate : public QWidgetPrivate
 {
 public:
@@ -222,7 +224,7 @@ QWindowContainer::QWindowContainer(QWindow *embeddedWindow, QWidget *parent, Qt:
     QString windowName = d->window->objectName();
     if (windowName.isEmpty())
         windowName = QString::fromUtf8(d->window->metaObject()->className());
-    d->fakeParent.setObjectName(windowName + QLatin1String("ContainerFakeParent"));
+    d->fakeParent.setObjectName(windowName + "ContainerFakeParent"_L1);
 
     d->window->setParent(&d->fakeParent);
     d->window->setFlag(Qt::SubWindow);
diff --git a/src/widgets/styles/qcommonstyle.cpp b/src/widgets/styles/qcommonstyle.cpp
index 22f7746c93..e286895b59 100644
--- a/src/widgets/styles/qcommonstyle.cpp
+++ b/src/widgets/styles/qcommonstyle.cpp
@@ -121,6 +121,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 static qreal qt_getDevicePixelRatio(const QWidget *widget)
 {
     return widget ? widget->devicePixelRatio() : qApp->devicePixelRatio();
@@ -732,7 +734,7 @@ void QCommonStyle::drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, Q
             QRect r = opt->rect;
             int size = qMin(r.height(), r.width());
             QPixmap pixmap;
-            QString pixmapName = QStyleHelper::uniqueName(QLatin1String("$qt_ia-")
+            QString pixmapName = QStyleHelper::uniqueName("$qt_ia-"_L1
                                                           % QLatin1String(metaObject()->className()), opt, QSize(size, size))
                                  % HexString<uint>(pe);
             if (!QPixmapCache::find(pixmapName, &pixmap)) {
@@ -2586,7 +2588,7 @@ QRect QCommonStyle::subElementRect(SubElement sr, const QStyleOption *opt,
             const bool vertical = !(pb->state & QStyle::State_Horizontal);
             if (!vertical) {
                 if (pb->textVisible)
-                    textw = qMax(pb->fontMetrics.horizontalAdvance(pb->text), pb->fontMetrics.horizontalAdvance(QLatin1String("100%"))) + 6;
+                    textw = qMax(pb->fontMetrics.horizontalAdvance(pb->text), pb->fontMetrics.horizontalAdvance("100%"_L1)) + 6;
             }
 
             if ((pb->textAlignment & Qt::AlignCenter) == 0) {
@@ -5468,145 +5470,139 @@ QPixmap QCommonStyle::standardPixmap(StandardPixmap sp, const QStyleOption *opti
         switch (sp) {
         case SP_DialogYesButton:
         case SP_DialogOkButton:
-            pixmap = QIcon::fromTheme(QLatin1String("dialog-ok")).pixmap(16);
+            pixmap = QIcon::fromTheme("dialog-ok"_L1).pixmap(16);
             break;
         case SP_DialogApplyButton:
-            pixmap = QIcon::fromTheme(QLatin1String("dialog-ok-apply")).pixmap(16);
+            pixmap = QIcon::fromTheme("dialog-ok-apply"_L1).pixmap(16);
             break;
         case SP_DialogDiscardButton:
-            pixmap = QIcon::fromTheme(QLatin1String("edit-delete")).pixmap(16);
+            pixmap = QIcon::fromTheme("edit-delete"_L1).pixmap(16);
             break;
         case SP_DialogCloseButton:
-            pixmap = QIcon::fromTheme(QLatin1String("dialog-close")).pixmap(16);
+            pixmap = QIcon::fromTheme("dialog-close"_L1).pixmap(16);
             break;
         case SP_DirHomeIcon:
-            pixmap = QIcon::fromTheme(QLatin1String("user-home")).pixmap(16);
+            pixmap = QIcon::fromTheme("user-home"_L1).pixmap(16);
             break;
         case SP_MessageBoxInformation:
-            pixmap = QIcon::fromTheme(QLatin1String("messagebox_info")).pixmap(16);
+            pixmap = QIcon::fromTheme("messagebox_info"_L1).pixmap(16);
             break;
         case SP_MessageBoxWarning:
-            pixmap = QIcon::fromTheme(QLatin1String("messagebox_warning")).pixmap(16);
+            pixmap = QIcon::fromTheme("messagebox_warning"_L1).pixmap(16);
             break;
         case SP_MessageBoxCritical:
-            pixmap = QIcon::fromTheme(QLatin1String("messagebox_critical")).pixmap(16);
+            pixmap = QIcon::fromTheme("messagebox_critical"_L1).pixmap(16);
             break;
         case SP_MessageBoxQuestion:
-            pixmap = QIcon::fromTheme(QLatin1String("help")).pixmap(16);
+            pixmap = QIcon::fromTheme("help"_L1).pixmap(16);
             break;
         case SP_DialogOpenButton:
         case SP_DirOpenIcon:
-            pixmap = QIcon::fromTheme(QLatin1String("folder-open")).pixmap(16);
+            pixmap = QIcon::fromTheme("folder-open"_L1).pixmap(16);
             break;
         case SP_FileIcon:
-            pixmap = QIcon::fromTheme(QLatin1String("text-x-generic"),
-                                      QIcon::fromTheme(QLatin1String("empty"))).pixmap(16);
+            pixmap = QIcon::fromTheme("text-x-generic"_L1, QIcon::fromTheme("empty"_L1)).pixmap(16);
             break;
         case SP_DirClosedIcon:
         case SP_DirIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("folder")).pixmap(16);
+                pixmap = QIcon::fromTheme("folder"_L1).pixmap(16);
                 break;
         case SP_DriveFDIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("media-floppy"),
-                                          QIcon::fromTheme(QLatin1String("3floppy_unmount"))).pixmap(16);
+                pixmap = QIcon::fromTheme("media-floppy"_L1,
+                                          QIcon::fromTheme("3floppy_unmount"_L1)).pixmap(16);
                 break;
         case SP_ComputerIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("computer"),
-                                          QIcon::fromTheme(QLatin1String("system"))).pixmap(16);
+                pixmap = QIcon::fromTheme("computer"_L1, QIcon::fromTheme("system"_L1)).pixmap(16);
                 break;
         case SP_DesktopIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("user-desktop"),
-                                          QIcon::fromTheme(QLatin1String("desktop"))).pixmap(16);
+                pixmap = QIcon::fromTheme("user-desktop"_L1,
+                                          QIcon::fromTheme("desktop"_L1)).pixmap(16);
                 break;
         case SP_TrashIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("user-trash"),
-                                          QIcon::fromTheme(QLatin1String("trashcan_empty"))).pixmap(16);
+                pixmap = QIcon::fromTheme("user-trash"_L1,
+                                          QIcon::fromTheme("trashcan_empty"_L1)).pixmap(16);
                 break;
         case SP_DriveCDIcon:
         case SP_DriveDVDIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("media-optical"),
-                                          QIcon::fromTheme(QLatin1String("cdrom_unmount"))).pixmap(16);
+                pixmap = QIcon::fromTheme("media-optical"_L1,
+                                          QIcon::fromTheme("cdrom_unmount"_L1)).pixmap(16);
                 break;
         case SP_DriveHDIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("drive-harddisk"),
-                                          QIcon::fromTheme(QLatin1String("hdd_unmount"))).pixmap(16);
+                pixmap = QIcon::fromTheme("drive-harddisk"_L1,
+                                          QIcon::fromTheme("hdd_unmount"_L1)).pixmap(16);
                 break;
         case SP_FileDialogToParent:
-                pixmap = QIcon::fromTheme(QLatin1String("go-up"),
-                                          QIcon::fromTheme(QLatin1String("up"))).pixmap(16);
+                pixmap = QIcon::fromTheme("go-up"_L1, QIcon::fromTheme("up"_L1)).pixmap(16);
                 break;
         case SP_FileDialogNewFolder:
-                pixmap = QIcon::fromTheme(QLatin1String("folder_new")).pixmap(16);
+                pixmap = QIcon::fromTheme("folder_new"_L1).pixmap(16);
                 break;
         case SP_ArrowUp:
-                pixmap = QIcon::fromTheme(QLatin1String("go-up"),
-                                          QIcon::fromTheme(QLatin1String("up"))).pixmap(16);
+                pixmap = QIcon::fromTheme("go-up"_L1,
+                                          QIcon::fromTheme("up"_L1)).pixmap(16);
                 break;
         case SP_ArrowDown:
-                pixmap = QIcon::fromTheme(QLatin1String("go-down"),
-                                          QIcon::fromTheme(QLatin1String("down"))).pixmap(16);
+                pixmap = QIcon::fromTheme("go-down"_L1, QIcon::fromTheme("down"_L1)).pixmap(16);
                 break;
         case SP_ArrowRight:
-                pixmap = QIcon::fromTheme(QLatin1String("go-next"),
-                                          QIcon::fromTheme(QLatin1String("forward"))).pixmap(16);
+                pixmap = QIcon::fromTheme("go-next"_L1, QIcon::fromTheme("forward"_L1)).pixmap(16);
                 break;
         case SP_ArrowLeft:
-                pixmap = QIcon::fromTheme(QLatin1String("go-previous"),
-                                          QIcon::fromTheme(QLatin1String("back"))).pixmap(16);
+                pixmap = QIcon::fromTheme("go-previous"_L1, QIcon::fromTheme("back"_L1)).pixmap(16);
                 break;
         case SP_FileDialogDetailedView:
-                pixmap = QIcon::fromTheme(QLatin1String("view_detailed")).pixmap(16);
+                pixmap = QIcon::fromTheme("view_detailed"_L1).pixmap(16);
                 break;
         case SP_FileDialogListView:
-                pixmap = QIcon::fromTheme(QLatin1String("view_icon")).pixmap(16);
+                pixmap = QIcon::fromTheme("view_icon"_L1).pixmap(16);
                 break;
         case SP_BrowserReload:
-                pixmap = QIcon::fromTheme(QLatin1String("reload")).pixmap(16);
+                pixmap = QIcon::fromTheme("reload"_L1).pixmap(16);
                 break;
         case SP_BrowserStop:
-                pixmap = QIcon::fromTheme(QLatin1String("process-stop")).pixmap(16);
+                pixmap = QIcon::fromTheme("process-stop"_L1).pixmap(16);
                 break;
         case SP_MediaPlay:
-                pixmap = QIcon::fromTheme(QLatin1String("media-playback-start")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-playback-start"_L1).pixmap(16);
                 break;
         case SP_MediaPause:
-                pixmap = QIcon::fromTheme(QLatin1String("media-playback-pause")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-playback-pause"_L1).pixmap(16);
                 break;
         case SP_MediaStop:
-                pixmap = QIcon::fromTheme(QLatin1String("media-playback-stop")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-playback-stop"_L1).pixmap(16);
                 break;
         case SP_MediaSeekForward:
-                pixmap = QIcon::fromTheme(QLatin1String("media-seek-forward")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-seek-forward"_L1).pixmap(16);
                 break;
         case SP_MediaSeekBackward:
-                pixmap = QIcon::fromTheme(QLatin1String("media-seek-backward")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-seek-backward"_L1).pixmap(16);
                 break;
         case SP_MediaSkipForward:
-                pixmap = QIcon::fromTheme(QLatin1String("media-skip-forward")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-skip-forward"_L1).pixmap(16);
                 break;
         case SP_MediaSkipBackward:
-                pixmap = QIcon::fromTheme(QLatin1String("media-skip-backward")).pixmap(16);
+                pixmap = QIcon::fromTheme("media-skip-backward"_L1).pixmap(16);
                 break;
         case SP_DialogResetButton:
-                pixmap = QIcon::fromTheme(QLatin1String("edit-clear")).pixmap(24);
+                pixmap = QIcon::fromTheme("edit-clear"_L1).pixmap(24);
                 break;
         case SP_DialogHelpButton:
-                pixmap = QIcon::fromTheme(QLatin1String("help-contents")).pixmap(24);
+                pixmap = QIcon::fromTheme("help-contents"_L1).pixmap(24);
                 break;
         case SP_DialogNoButton:
         case SP_DialogCancelButton:
-                pixmap = QIcon::fromTheme(QLatin1String("dialog-cancel"),
-                                         QIcon::fromTheme(QLatin1String("process-stop"))).pixmap(24);
+                pixmap = QIcon::fromTheme("dialog-cancel"_L1,
+                                         QIcon::fromTheme("process-stop"_L1)).pixmap(24);
                 break;
         case SP_DialogSaveButton:
-                pixmap = QIcon::fromTheme(QLatin1String("document-save")).pixmap(24);
+                pixmap = QIcon::fromTheme("document-save"_L1).pixmap(24);
                 break;
         case SP_FileLinkIcon:
-            pixmap = QIcon::fromTheme(QLatin1String("emblem-symbolic-link")).pixmap(16);
+            pixmap = QIcon::fromTheme("emblem-symbolic-link"_L1).pixmap(16);
             if (!pixmap.isNull()) {
-                QPixmap fileIcon = QIcon::fromTheme(QLatin1String("text-x-generic")).pixmap(16);
+                QPixmap fileIcon = QIcon::fromTheme("text-x-generic"_L1).pixmap(16);
                 if (fileIcon.isNull())
-                    fileIcon = QIcon::fromTheme(QLatin1String("empty")).pixmap(16);
+                    fileIcon = QIcon::fromTheme("empty"_L1).pixmap(16);
                 if (!fileIcon.isNull()) {
                     QPainter painter(&fileIcon);
                     painter.drawPixmap(0, 0, 16, 16, pixmap);
@@ -5615,9 +5611,9 @@ QPixmap QCommonStyle::standardPixmap(StandardPixmap sp, const QStyleOption *opti
             }
             break;
         case SP_DirLinkIcon:
-                pixmap = QIcon::fromTheme(QLatin1String("emblem-symbolic-link")).pixmap(16);
+                pixmap = QIcon::fromTheme("emblem-symbolic-link"_L1).pixmap(16);
                 if (!pixmap.isNull()) {
-                    QPixmap dirIcon = QIcon::fromTheme(QLatin1String("folder")).pixmap(16);
+                    QPixmap dirIcon = QIcon::fromTheme("folder"_L1).pixmap(16);
                     if (!dirIcon.isNull()) {
                         QPainter painter(&dirIcon);
                         painter.drawPixmap(0, 0, 16, 16, pixmap);
@@ -5663,103 +5659,103 @@ QPixmap QCommonStyle::standardPixmap(StandardPixmap sp, const QStyleOption *opti
             return proxy()->standardPixmap(SP_ArrowRight, option, widget);
         return proxy()->standardPixmap(SP_ArrowLeft, option, widget);
     case SP_ArrowLeft:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/left-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/left-16.png"_L1);
     case SP_ArrowRight:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/right-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/right-16.png"_L1);
     case SP_ArrowUp:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/up-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/up-16.png"_L1);
     case SP_ArrowDown:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/down-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/down-16.png"_L1);
     case SP_FileDialogToParent:
         return proxy()->standardPixmap(SP_ArrowUp, option, widget);
     case SP_FileDialogNewFolder:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/newdirectory-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/newdirectory-16.png"_L1);
     case SP_FileDialogDetailedView:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewdetailed-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/viewdetailed-16.png"_L1);
     case SP_FileDialogInfoView:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/fileinfo-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/fileinfo-16.png"_L1);
     case SP_FileDialogContentsView:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/filecontents-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/filecontents-16.png"_L1);
     case SP_FileDialogListView:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewlist-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/viewlist-16.png"_L1);
     case SP_FileDialogBack:
         return proxy()->standardPixmap(SP_ArrowBack, option, widget);
     case SP_DriveHDIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/harddrive-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/harddrive-16.png"_L1);
     case SP_TrashIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/trash-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/trash-16.png"_L1);
     case SP_DriveFDIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/floppy-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/floppy-16.png"_L1);
     case SP_DriveNetIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/networkdrive-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/networkdrive-16.png"_L1);
     case SP_DesktopIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/desktop-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/desktop-16.png"_L1);
     case SP_ComputerIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/computer-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/computer-16.png"_L1);
     case SP_DriveCDIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/cdr-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/cdr-16.png"_L1);
     case SP_DriveDVDIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/dvd-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/dvd-16.png"_L1);
     case SP_DirHomeIcon:
     case SP_DirOpenIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/diropen-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/diropen-16.png"_L1);
     case SP_DirIcon:
     case SP_DirClosedIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/dirclosed-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/dirclosed-16.png"_L1);
     case SP_DirLinkIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/dirlink-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/dirlink-16.png"_L1);
     case SP_FileIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/file-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/file-16.png"_L1);
     case SP_FileLinkIcon:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/filelink-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/filelink-16.png"_L1);
     case SP_DialogOkButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-16.png"_L1);
     case SP_DialogCancelButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-16.png"_L1);
     case SP_DialogHelpButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-help-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-help-16.png"_L1);
     case SP_DialogOpenButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-open-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-open-16.png"_L1);
     case SP_DialogSaveButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-save-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-save-16.png"_L1);
     case SP_DialogCloseButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-close-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-close-16.png"_L1);
     case SP_DialogApplyButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-16.png"_L1);
     case SP_DialogResetButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-16.png"_L1);
     case SP_DialogDiscardButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-16.png"_L1);
     case SP_DialogYesButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-16.png"_L1);
     case SP_DialogNoButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-no-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-no-16.png"_L1);
     case SP_BrowserReload:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/refresh-24.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/refresh-24.png"_L1);
     case SP_BrowserStop:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/stop-24.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/stop-24.png"_L1);
     case SP_MediaPlay:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-play-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-play-32.png"_L1);
     case SP_MediaPause:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-pause-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-pause-32.png"_L1);
     case SP_MediaStop:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-stop-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-stop-32.png"_L1);
     case SP_MediaSeekForward:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-seek-forward-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-seek-forward-32.png"_L1);
     case SP_MediaSeekBackward:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-seek-backward-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-seek-backward-32.png"_L1);
     case SP_MediaSkipForward:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-skip-forward-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-skip-forward-32.png"_L1);
     case SP_MediaSkipBackward:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-skip-backward-32.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-skip-backward-32.png"_L1);
     case SP_MediaVolume:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-volume-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-volume-16.png"_L1);
     case SP_MediaVolumeMuted:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-volume-muted-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/media-volume-muted-16.png"_L1);
     case SP_LineEditClearButton:
         return QPixmap(clearText16IconPath());
     case SP_TabCloseButton:
-        return QPixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-closetab-16.png"));
+        return QPixmap(":/qt-project.org/styles/commonstyle/images/standardbutton-closetab-16.png"_L1);
 #endif // QT_NO_IMAGEFORMAT_PNG
     default:
         break;
@@ -5883,134 +5879,132 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
     if (QGuiApplication::desktopSettingsAware() && !QIcon::themeName().isEmpty()) {
         switch (standardIcon) {
         case SP_DirHomeIcon:
-                icon = QIcon::fromTheme(QLatin1String("user-home"));
+                icon = QIcon::fromTheme("user-home"_L1);
                 break;
         case SP_MessageBoxInformation:
-                icon = QIcon::fromTheme(QLatin1String("dialog-information"));
+                icon = QIcon::fromTheme("dialog-information"_L1);
                 break;
         case SP_MessageBoxWarning:
-                icon = QIcon::fromTheme(QLatin1String("dialog-warning"));
+                icon = QIcon::fromTheme("dialog-warning"_L1);
                 break;
         case SP_MessageBoxCritical:
-                icon = QIcon::fromTheme(QLatin1String("dialog-error"));
+                icon = QIcon::fromTheme("dialog-error"_L1);
                 break;
         case SP_MessageBoxQuestion:
-                icon = QIcon::fromTheme(QLatin1String("dialog-question"));
+                icon = QIcon::fromTheme("dialog-question"_L1);
                 break;
         case SP_DialogOpenButton:
         case SP_DirOpenIcon:
-                icon = QIcon::fromTheme(QLatin1String("folder-open"));
+                icon = QIcon::fromTheme("folder-open"_L1);
                 break;
         case SP_DialogSaveButton:
-                icon = QIcon::fromTheme(QLatin1String("document-save"));
+                icon = QIcon::fromTheme("document-save"_L1);
                 break;
         case SP_DialogApplyButton:
-                icon = QIcon::fromTheme(QLatin1String("dialog-ok-apply"));
+                icon = QIcon::fromTheme("dialog-ok-apply"_L1);
                 break;
         case SP_DialogYesButton:
         case SP_DialogOkButton:
-                icon = QIcon::fromTheme(QLatin1String("dialog-ok"));
+                icon = QIcon::fromTheme("dialog-ok"_L1);
                 break;
         case SP_DialogDiscardButton:
-                icon = QIcon::fromTheme(QLatin1String("edit-delete"));
+                icon = QIcon::fromTheme("edit-delete"_L1);
                 break;
         case SP_DialogResetButton:
-                icon = QIcon::fromTheme(QLatin1String("edit-clear"));
+                icon = QIcon::fromTheme("edit-clear"_L1);
                 break;
         case SP_DialogHelpButton:
-                icon = QIcon::fromTheme(QLatin1String("help-contents"));
+                icon = QIcon::fromTheme("help-contents"_L1);
                 break;
         case SP_FileIcon:
-                icon = QIcon::fromTheme(QLatin1String("text-x-generic"));
+                icon = QIcon::fromTheme("text-x-generic"_L1);
                 break;
         case SP_DirClosedIcon:
         case SP_DirIcon:
-                icon = QIcon::fromTheme(QLatin1String("folder"));
+                icon = QIcon::fromTheme("folder"_L1);
                 break;
         case SP_DriveFDIcon:
-                icon = QIcon::fromTheme(QLatin1String("floppy_unmount"));
+                icon = QIcon::fromTheme("floppy_unmount"_L1);
                 break;
         case SP_ComputerIcon:
-                icon = QIcon::fromTheme(QLatin1String("computer"),
-                                        QIcon::fromTheme(QLatin1String("system")));
+                icon = QIcon::fromTheme("computer"_L1, QIcon::fromTheme("system"_L1));
                 break;
         case SP_DesktopIcon:
-                icon = QIcon::fromTheme(QLatin1String("user-desktop"));
+                icon = QIcon::fromTheme("user-desktop"_L1);
                 break;
         case SP_TrashIcon:
-                icon = QIcon::fromTheme(QLatin1String("user-trash"));
+                icon = QIcon::fromTheme("user-trash"_L1);
                 break;
         case SP_DriveCDIcon:
         case SP_DriveDVDIcon:
-                icon = QIcon::fromTheme(QLatin1String("media-optical"));
+                icon = QIcon::fromTheme("media-optical"_L1);
                 break;
         case SP_DriveHDIcon:
-                icon = QIcon::fromTheme(QLatin1String("drive-harddisk"));
+                icon = QIcon::fromTheme("drive-harddisk"_L1);
                 break;
         case SP_FileDialogToParent:
-                icon = QIcon::fromTheme(QLatin1String("go-up"));
+                icon = QIcon::fromTheme("go-up"_L1);
                 break;
         case SP_FileDialogNewFolder:
-                icon = QIcon::fromTheme(QLatin1String("folder-new"));
+                icon = QIcon::fromTheme("folder-new"_L1);
                 break;
         case SP_ArrowUp:
-                icon = QIcon::fromTheme(QLatin1String("go-up"));
+                icon = QIcon::fromTheme("go-up"_L1);
                 break;
         case SP_ArrowDown:
-                icon = QIcon::fromTheme(QLatin1String("go-down"));
+                icon = QIcon::fromTheme("go-down"_L1);
                 break;
         case SP_ArrowRight:
-                icon = QIcon::fromTheme(QLatin1String("go-next"));
+                icon = QIcon::fromTheme("go-next"_L1);
                 break;
         case SP_ArrowLeft:
-                icon = QIcon::fromTheme(QLatin1String("go-previous"));
+                icon = QIcon::fromTheme("go-previous"_L1);
                 break;
         case SP_DialogNoButton:
         case SP_DialogCancelButton:
-                icon = QIcon::fromTheme(QLatin1String("dialog-cancel"),
-                                        QIcon::fromTheme(QLatin1String("process-stop")));
+                icon = QIcon::fromTheme("dialog-cancel"_L1, QIcon::fromTheme("process-stop"_L1));
                 break;
         case SP_DialogCloseButton:
-                icon = QIcon::fromTheme(QLatin1String("window-close"));
+                icon = QIcon::fromTheme("window-close"_L1);
                 break;
         case SP_FileDialogDetailedView:
-                icon = QIcon::fromTheme(QLatin1String("view-list-details"));
+                icon = QIcon::fromTheme("view-list-details"_L1);
                 break;
         case SP_FileDialogListView:
-                icon = QIcon::fromTheme(QLatin1String("view-list-icons"));
+                icon = QIcon::fromTheme("view-list-icons"_L1);
                 break;
         case SP_BrowserReload:
-                icon = QIcon::fromTheme(QLatin1String("view-refresh"));
+                icon = QIcon::fromTheme("view-refresh"_L1);
                 break;
         case SP_BrowserStop:
-                icon = QIcon::fromTheme(QLatin1String("process-stop"));
+                icon = QIcon::fromTheme("process-stop"_L1);
                 break;
         case SP_MediaPlay:
-                icon = QIcon::fromTheme(QLatin1String("media-playback-start"));
+                icon = QIcon::fromTheme("media-playback-start"_L1);
                 break;
         case SP_MediaPause:
-                icon = QIcon::fromTheme(QLatin1String("media-playback-pause"));
+                icon = QIcon::fromTheme("media-playback-pause"_L1);
                 break;
         case SP_MediaStop:
-                icon = QIcon::fromTheme(QLatin1String("media-playback-stop"));
+                icon = QIcon::fromTheme("media-playback-stop"_L1);
                 break;
         case SP_MediaSeekForward:
-                icon = QIcon::fromTheme(QLatin1String("media-seek-forward"));
+                icon = QIcon::fromTheme("media-seek-forward"_L1);
                 break;
         case SP_MediaSeekBackward:
-                icon = QIcon::fromTheme(QLatin1String("media-seek-backward"));
+                icon = QIcon::fromTheme("media-seek-backward"_L1);
                 break;
         case SP_MediaSkipForward:
-                icon = QIcon::fromTheme(QLatin1String("media-skip-forward"));
+                icon = QIcon::fromTheme("media-skip-forward"_L1);
                 break;
         case SP_MediaSkipBackward:
-                icon = QIcon::fromTheme(QLatin1String("media-skip-backward"));
+                icon = QIcon::fromTheme("media-skip-backward"_L1);
                 break;
         case SP_MediaVolume:
-                icon = QIcon::fromTheme(QLatin1String("audio-volume-medium"));
+                icon = QIcon::fromTheme("audio-volume-medium"_L1);
                 break;
         case SP_MediaVolumeMuted:
-                icon = QIcon::fromTheme(QLatin1String("audio-volume-muted"));
+                icon = QIcon::fromTheme("audio-volume-muted"_L1);
                 break;
         case SP_ArrowForward:
             if (rtl)
@@ -6022,7 +6016,7 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
             return QCommonStyle::standardIcon(SP_ArrowLeft, option, widget);
         case SP_FileLinkIcon:
             {
-                QIcon linkIcon = QIcon::fromTheme(QLatin1String("emblem-symbolic-link"));
+                QIcon linkIcon = QIcon::fromTheme("emblem-symbolic-link"_L1);
                 if (!linkIcon.isNull()) {
                     QIcon baseIcon = QCommonStyle::standardIcon(SP_FileIcon, option, widget);
                     const QList<QSize> sizes = baseIcon.availableSizes(QIcon::Normal, QIcon::Off);
@@ -6039,7 +6033,7 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
             break;
         case SP_DirLinkIcon:
             {
-                QIcon linkIcon = QIcon::fromTheme(QLatin1String("emblem-symbolic-link"));
+                QIcon linkIcon = QIcon::fromTheme("emblem-symbolic-link"_L1);
                 if (!linkIcon.isNull()) {
                     QIcon baseIcon = QCommonStyle::standardIcon(SP_DirIcon, option, widget);
                     const QList<QSize> sizes = baseIcon.availableSizes(QIcon::Normal, QIcon::Off);
@@ -6114,7 +6108,7 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
                 const QList<QSize> sizes = theme->themeHint(QPlatformTheme::IconPixmapSizes).value<QList<QSize> >();
                 for (const QSize &size : sizes) {
                     QPixmap mainIcon;
-                    const QString cacheKey = QLatin1String("qt_mac_constructQIconFromIconRef") + QString::number(standardIcon) + QString::number(size.width());
+                    const QString cacheKey = "qt_mac_constructQIconFromIconRef"_L1 + QString::number(standardIcon) + QString::number(size.width());
                     if (standardIcon >= QStyle::SP_CustomBase) {
                         mainIcon = theme->standardPixmap(sp, QSizeF(size));
                     } else if (QPixmapCache::find(cacheKey, &mainIcon) == false) {
@@ -6158,88 +6152,88 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
                      titleBarSizes, sizeof(titleBarSizes)/sizeof(titleBarSizes[0]), icon);
         break;
      case SP_FileDialogNewFolder:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/newdirectory-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/newdirectory-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/newdirectory-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/newdirectory-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/newdirectory-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/newdirectory-128.png"_L1, QSize(128, 128));
         break;
     case SP_FileDialogBack:
         return QCommonStyle::standardIcon(SP_ArrowBack, option, widget);
     case SP_FileDialogToParent:
         return QCommonStyle::standardIcon(SP_ArrowUp, option, widget);
     case SP_FileDialogDetailedView:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewdetailed-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewdetailed-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewdetailed-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/viewdetailed-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/viewdetailed-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/viewdetailed-128.png"_L1, QSize(128, 128));
         break;
     case SP_FileDialogInfoView:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/fileinfo-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/fileinfo-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/fileinfo-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/fileinfo-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/fileinfo-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/fileinfo-128.png"_L1, QSize(128, 128));
         break;
     case SP_FileDialogContentsView:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/filecontents-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/filecontents-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/filecontents-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/filecontents-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/filecontents-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/filecontents-128.png"_L1, QSize(128, 128));
         break;
     case SP_FileDialogListView:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewlist-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewlist-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/viewlist-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/viewlist-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/viewlist-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/viewlist-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogOkButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-ok-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogCancelButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-cancel-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogHelpButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-help-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-help-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-help-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-help-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-help-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-help-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogOpenButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-open-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-open-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-open-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-open-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-open-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-open-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogSaveButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-save-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-save-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-save-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-save-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-save-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-save-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogCloseButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-close-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-close-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-close-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-close-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-close-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-close-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogApplyButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-apply-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogResetButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-clear-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogDiscardButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-delete-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogYesButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-yes-128.png"_L1, QSize(128, 128));
         break;
     case SP_DialogNoButton:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-no-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-no-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/standardbutton-no-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-no-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-no-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/standardbutton-no-128.png"_L1, QSize(128, 128));
         break;
     case SP_ArrowForward:
         if (rtl)
@@ -6250,106 +6244,106 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
             return QCommonStyle::standardIcon(SP_ArrowRight, option, widget);
         return QCommonStyle::standardIcon(SP_ArrowLeft, option, widget);
     case SP_ArrowLeft:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/left-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/left-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/left-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/left-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/left-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/left-128.png"_L1, QSize(128, 128));
         break;
     case SP_ArrowRight:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/right-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/right-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/right-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/right-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/right-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/right-128.png"_L1, QSize(128, 128));
         break;
     case SP_ArrowUp:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/up-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/up-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/up-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/up-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/up-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/up-128.png"_L1, QSize(128, 128));
         break;
     case SP_ArrowDown:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/down-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/down-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/down-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/down-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/down-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/down-128.png"_L1, QSize(128, 128));
         break;
    case SP_DirHomeIcon:
    case SP_DirIcon:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/dirclosed-16.png"),
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/dirclosed-16.png"_L1,
                      QSize(), QIcon::Normal, QIcon::Off);
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/diropen-16.png"),
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/diropen-16.png"_L1,
                      QSize(), QIcon::Normal, QIcon::On);
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/dirclosed-32.png"),
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/dirclosed-32.png"_L1,
                      QSize(32, 32), QIcon::Normal, QIcon::Off);
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/diropen-32.png"),
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/diropen-32.png"_L1,
                      QSize(32, 32), QIcon::Normal, QIcon::On);
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/dirclosed-128.png"),
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/dirclosed-128.png"_L1,
                      QSize(128, 128), QIcon::Normal, QIcon::Off);
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/diropen-128.png"),
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/diropen-128.png"_L1,
                      QSize(128, 128), QIcon::Normal, QIcon::On);
         break;
     case SP_DriveCDIcon:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/cdr-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/cdr-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/cdr-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/cdr-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/cdr-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/cdr-128.png"_L1, QSize(128, 128));
         break;
     case SP_DriveDVDIcon:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/dvd-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/dvd-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/dvd-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/dvd-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/dvd-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/dvd-128.png"_L1, QSize(128, 128));
         break;
     case SP_FileIcon:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/file-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/file-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/file-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/file-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/file-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/file-128.png"_L1, QSize(128, 128));
         break;
     case SP_FileLinkIcon:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/filelink-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/filelink-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/filelink-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/filelink-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/filelink-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/filelink-128.png"_L1, QSize(128, 128));
         break;
     case SP_TrashIcon:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/trash-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/trash-32.png"), QSize(32, 32));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/trash-128.png"), QSize(128, 128));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/trash-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/trash-32.png"_L1, QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/trash-128.png"_L1, QSize(128, 128));
         break;
     case SP_BrowserReload:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/refresh-24.png"), QSize(24, 24));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/refresh-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/refresh-24.png"_L1, QSize(24, 24));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/refresh-32.png"_L1, QSize(32, 32));
         break;
     case SP_BrowserStop:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/stop-24.png"), QSize(24, 24));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/stop-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/stop-24.png"_L1, QSize(24, 24));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/stop-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaPlay:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-play-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-play-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-play-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-play-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaPause:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-pause-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-pause-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-pause-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-pause-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaStop:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-stop-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-stop-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-stop-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-stop-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaSeekForward:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-seek-forward-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-seek-forward-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-seek-forward-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-seek-forward-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaSeekBackward:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-seek-backward-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-seek-backward-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-seek-backward-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-seek-backward-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaSkipForward:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-skip-forward-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-skip-forward-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-skip-forward-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-skip-forward-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaSkipBackward:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-skip-backward-16.png"), QSize(16, 16));
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-skip-backward-32.png"), QSize(32, 32));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-skip-backward-16.png"_L1, QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-skip-backward-32.png"_L1, QSize(32, 32));
         break;
     case SP_MediaVolume:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-volume-16.png"), QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-volume-16.png"_L1, QSize(16, 16));
         break;
     case SP_MediaVolumeMuted:
-        icon.addFile(QLatin1String(":/qt-project.org/styles/commonstyle/images/media-volume-muted-16.png"), QSize(16, 16));
+        icon.addFile(":/qt-project.org/styles/commonstyle/images/media-volume-muted-16.png"_L1, QSize(16, 16));
         break;
     case SP_TitleBarCloseButton:
         addIconFiles(iconResourcePrefix() + QStringLiteral("closedock-"),
@@ -6359,7 +6353,7 @@ QIcon QCommonStyle::standardIcon(StandardPixmap standardIcon, const QStyleOption
 #  ifndef QT_NO_IMAGEFORMAT_XPM
         icon.addPixmap(titleBarMenuCachedPixmapFromXPM());
 #  endif
-        icon.addFile(QLatin1String(":/qt-project.org/qmessagebox/images/qtlogo-64.png"));
+        icon.addFile(":/qt-project.org/qmessagebox/images/qtlogo-64.png"_L1);
         break;
     case SP_TitleBarNormalButton:
         addIconFiles(iconResourcePrefix() + QStringLiteral("normalizedockup-"),
diff --git a/src/widgets/styles/qfusionstyle.cpp b/src/widgets/styles/qfusionstyle.cpp
index 396f5626fa..0473351f89 100644
--- a/src/widgets/styles/qfusionstyle.cpp
+++ b/src/widgets/styles/qfusionstyle.cpp
@@ -93,6 +93,7 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
 using namespace QStyleHelper;
 
 enum Direction {
@@ -259,7 +260,7 @@ static void qt_fusion_draw_arrow(Qt::ArrowType type, QPainter *painter, const QS
     const int size = qMin(arrowMax, rectMax);
 
     QPixmap cachePixmap;
-    QString cacheKey = QStyleHelper::uniqueName(QLatin1String("fusion-arrow"), option, rect.size())
+    QString cacheKey = QStyleHelper::uniqueName("fusion-arrow"_L1, option, rect.size())
             % HexString<uint>(type)
             % HexString<uint>(color.rgba());
     if (!QPixmapCache::find(cacheKey, &cachePixmap)) {
@@ -390,7 +391,7 @@ QFusionStylePrivate::QFusionStylePrivate()
 */
 QFusionStyle::QFusionStyle() : QCommonStyle(*new QFusionStylePrivate)
 {
-    setObjectName(QLatin1String("Fusion"));
+    setObjectName("Fusion"_L1);
 }
 
 /*!
@@ -470,7 +471,7 @@ void QFusionStyle::drawPrimitive(PrimitiveElement elem,
     // No frame drawn
     case PE_FrameGroupBox:
     {
-        QPixmap pixmap(QLatin1String(":/qt-project.org/styles/commonstyle/images/fusion_groupbox.png"));
+        QPixmap pixmap(":/qt-project.org/styles/commonstyle/images/fusion_groupbox.png"_L1);
         int topMargin = 0;
         auto control = qobject_cast<const QGroupBox *>(widget);
         if (control && !control->isCheckable() && control->title().isEmpty()) {
@@ -1271,7 +1272,7 @@ void QFusionStyle::drawControl(ControlElement element, const QStyleOption *optio
         // Draws the header in tables.
         if (const QStyleOptionHeader *header = qstyleoption_cast<const QStyleOptionHeader *>(option)) {
             const QStyleOptionHeaderV2 *headerV2 = qstyleoption_cast<const QStyleOptionHeaderV2 *>(option);
-            QString pixmapName = QStyleHelper::uniqueName(QLatin1String("headersection"), option, option->rect.size());
+            QString pixmapName = QStyleHelper::uniqueName("headersection"_L1, option, option->rect.size());
             pixmapName += QString::number(- int(header->position));
             pixmapName += QString::number(- int(header->orientation));
             if (headerV2)
@@ -1988,7 +1989,7 @@ void QFusionStyle::drawComplexControl(ComplexControl control, const QStyleOption
     case CC_SpinBox:
         if (const QStyleOptionSpinBox *spinBox = qstyleoption_cast<const QStyleOptionSpinBox *>(option)) {
             QPixmap cache;
-            QString pixmapName = QStyleHelper::uniqueName(QLatin1String("spinbox"), spinBox, spinBox->rect.size());
+            QString pixmapName = QStyleHelper::uniqueName("spinbox"_L1, spinBox, spinBox->rect.size());
             if (!QPixmapCache::find(pixmapName, &cache)) {
 
                 cache = styleCachePixmap(spinBox->rect.size());
@@ -2698,15 +2699,15 @@ void QFusionStyle::drawComplexControl(ComplexControl control, const QStyleOption
             bool sunken = comboBox->state & State_On; // play dead, if combobox has no items
             bool isEnabled = (comboBox->state & State_Enabled);
             QPixmap cache;
-            QString pixmapName = QStyleHelper::uniqueName(QLatin1String("combobox"), option, comboBox->rect.size());
+            QString pixmapName = QStyleHelper::uniqueName("combobox"_L1, option, comboBox->rect.size());
             if (sunken)
-                pixmapName += QLatin1String("-sunken");
+                pixmapName += "-sunken"_L1;
             if (comboBox->editable)
-                pixmapName += QLatin1String("-editable");
+                pixmapName += "-editable"_L1;
             if (isEnabled)
-                pixmapName += QLatin1String("-enabled");
+                pixmapName += "-enabled"_L1;
             if (!comboBox->frame)
-                pixmapName += QLatin1String("-frameless");
+                pixmapName += "-frameless"_L1;
 
             if (!QPixmapCache::find(pixmapName, &cache)) {
                 cache = styleCachePixmap(comboBox->rect.size());
@@ -2819,7 +2820,7 @@ void QFusionStyle::drawComplexControl(ComplexControl control, const QStyleOption
                 grooveColor.setHsv(buttonColor.hue(),
                                    qMin(255, (int)(buttonColor.saturation())),
                                    qMin(255, (int)(buttonColor.value()*0.9)));
-                QString groovePixmapName = QStyleHelper::uniqueName(QLatin1String("slider_groove"), option, groove.size());
+                QString groovePixmapName = QStyleHelper::uniqueName("slider_groove"_L1, option, groove.size());
                 QRect pixmapRect(0, 0, groove.width(), groove.height());
 
                 // draw background groove
@@ -2850,7 +2851,7 @@ void QFusionStyle::drawComplexControl(ComplexControl control, const QStyleOption
 
                 // draw blue groove highlight
                 QRect clipRect;
-                groovePixmapName += QLatin1String("_blue");
+                groovePixmapName += "_blue"_L1;
                 if (!QPixmapCache::find(groovePixmapName, &cache)) {
                     cache = styleCachePixmap(pixmapRect.size());
                     cache.fill(Qt::transparent);
@@ -2957,7 +2958,7 @@ void QFusionStyle::drawComplexControl(ComplexControl control, const QStyleOption
             }
             // draw handle
             if ((option->subControls & SC_SliderHandle) ) {
-                QString handlePixmapName = QStyleHelper::uniqueName(QLatin1String("slider_handle"), option, handle.size());
+                QString handlePixmapName = QStyleHelper::uniqueName("slider_handle"_L1, option, handle.size());
                 if (!QPixmapCache::find(handlePixmapName, &cache)) {
                     cache = styleCachePixmap(handle.size());
                     cache.fill(Qt::transparent);
diff --git a/src/widgets/styles/qproxystyle.cpp b/src/widgets/styles/qproxystyle.cpp
index 585177c30d..67dcc97f54 100644
--- a/src/widgets/styles/qproxystyle.cpp
+++ b/src/widgets/styles/qproxystyle.cpp
@@ -48,6 +48,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     \class QProxyStyle
 
@@ -106,7 +108,7 @@ void QProxyStylePrivate::ensureBaseStyle() const
         baseStyle = QStyleFactory::create(QApplicationPrivate::desktopStyleKey());
 
     if (!baseStyle) // Fallback to windows style
-        baseStyle = QStyleFactory::create(QLatin1String("windows"));
+        baseStyle = QStyleFactory::create("windows"_L1);
 
     baseStyle->setProxy(const_cast<QProxyStyle*>(q));
     baseStyle->setParent(const_cast<QProxyStyle*>(q)); // Take ownership
diff --git a/src/widgets/styles/qstylefactory.cpp b/src/widgets/styles/qstylefactory.cpp
index 70d08468ca..d415e49ec8 100644
--- a/src/widgets/styles/qstylefactory.cpp
+++ b/src/widgets/styles/qstylefactory.cpp
@@ -50,8 +50,10 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
-    (QStyleFactoryInterface_iid, QLatin1String("/styles"), Qt::CaseInsensitive))
+    (QStyleFactoryInterface_iid, "/styles"_L1, Qt::CaseInsensitive))
 
 /*!
     \class QStyleFactory
@@ -91,17 +93,17 @@ QStyle *QStyleFactory::create(const QString& key)
     QStyle *ret = nullptr;
     QString style = key.toLower();
 #if QT_CONFIG(style_windows)
-    if (style == QLatin1String("windows"))
+    if (style == "windows"_L1)
         ret = new QWindowsStyle;
     else
 #endif
 #if QT_CONFIG(style_fusion)
-    if (style == QLatin1String("fusion"))
+    if (style == "fusion"_L1)
         ret = new QFusionStyle;
     else
 #endif
 #if defined(Q_OS_MACOS) && QT_DEPRECATED_SINCE(6, 0)
-    if (style == QLatin1String("macintosh")) {
+    if (style == "macintosh"_L1) {
         qWarning() << "The style key 'macintosh' is deprecated. Please use 'macos' instead.";
         style = QStringLiteral("macos");
     } else
@@ -132,12 +134,12 @@ QStringList QStyleFactory::keys()
     for (PluginKeyMap::const_iterator it = keyMap.constBegin(); it != cend; ++it)
         list.append(it.value());
 #if QT_CONFIG(style_windows)
-    if (!list.contains(QLatin1String("Windows")))
-        list << QLatin1String("Windows");
+    if (!list.contains("Windows"_L1))
+        list << "Windows"_L1;
 #endif
 #if QT_CONFIG(style_fusion)
-    if (!list.contains(QLatin1String("Fusion")))
-        list << QLatin1String("Fusion");
+    if (!list.contains("Fusion"_L1))
+        list << "Fusion"_L1;
 #endif
     return list;
 }
diff --git a/src/widgets/styles/qstylesheetstyle.cpp b/src/widgets/styles/qstylesheetstyle.cpp
index 4575d5a299..c7e77a2d56 100644
--- a/src/widgets/styles/qstylesheetstyle.cpp
+++ b/src/widgets/styles/qstylesheetstyle.cpp
@@ -806,9 +806,9 @@ QHash<QStyle::SubControl, QRect> QStyleSheetStyle::titleBarLayout(const QWidget
     const bool isMaximized = tb->titleBarState & Qt::WindowMaximized;
     QRenderRule subRule = renderRule(w, tb);
     QRect cr = subRule.contentsRect(tb->rect);
-    QList<QVariant> layout = subRule.styleHint(QLatin1String("button-layout")).toList();
+    QList<QVariant> layout = subRule.styleHint("button-layout"_L1).toList();
     if (layout.isEmpty())
-        layout = subControlLayout(QLatin1String("I(T)HSmMX"));
+        layout = subControlLayout("I(T)HSmMX"_L1);
 
     int offsets[3] = { 0, 0, 0 };
     enum Where { Left, Right, Center, NoWhere } where = Left;
@@ -1024,7 +1024,7 @@ QRenderRule::QRenderRule(const QList<Declaration> &declarations, const QObject *
             int cuts[4];
 
             decl.borderImageValue(&uri, cuts, &horizStretch, &vertStretch);
-            if (uri.isEmpty() || uri == QLatin1String("none")) {
+            if (uri.isEmpty() || uri == "none"_L1) {
                 if (bd && bd->bi)
                     bd->bi->pixmap = QPixmap();
             } else {
@@ -1046,7 +1046,7 @@ QRenderRule::QRenderRule(const QList<Declaration> &declarations, const QObject *
             int role = decl.d->values.at(0).variant.toInt();
             if (role >= Value_FirstColorRole && role <= Value_LastColorRole)
                 defaultBackground = palette.color((QPalette::ColorRole)(role-Value_FirstColorRole));
-        } else if (decl.d->property.startsWith(QLatin1String("qproperty-"), Qt::CaseInsensitive)) {
+        } else if (decl.d->property.startsWith("qproperty-"_L1, Qt::CaseInsensitive)) {
             // intentionally left blank...
         } else if (decl.d->propertyId == UnknownProperty) {
             bool knownStyleHint = false;
@@ -1055,11 +1055,11 @@ QRenderRule::QRenderRule(const QList<Declaration> &declarations, const QObject *
                 if (decl.d->property.compare(styleHint) == 0) {
                     QString hintName = QString(styleHint);
                     QVariant hintValue;
-                    if (hintName.endsWith(QLatin1String("alignment"))) {
+                    if (hintName.endsWith("alignment"_L1)) {
                         hintValue = (int) decl.alignmentValue();
-                    } else if (hintName.endsWith(QLatin1String("color"))) {
+                    } else if (hintName.endsWith("color"_L1)) {
                         hintValue = (int) decl.colorValue().rgba();
-                    } else if (hintName.endsWith(QLatin1String("size"))) {
+                    } else if (hintName.endsWith("size"_L1)) {
                         // Check only for the 'em' case
                         const QString valueString = decl.d->values.at(0).variant.toString();
                         const bool isEmSize = valueString.endsWith(u"em", Qt::CaseInsensitive);
@@ -1089,9 +1089,9 @@ QRenderRule::QRenderRule(const QList<Declaration> &declarations, const QObject *
                             // Normal case where we receive a 'px' or 'pt' unit
                             hintValue = decl.sizeValue();
                         }
-                    } else if (hintName.endsWith(QLatin1String("icon"))) {
+                    } else if (hintName.endsWith("icon"_L1)) {
                         hintValue = decl.iconValue();
-                    } else if (hintName == QLatin1String("button-layout")
+                    } else if (hintName == "button-layout"_L1
                                 && decl.d->values.count() != 0 && decl.d->values.at(0).type == Value::String) {
                         hintValue = subControlLayout(decl.d->values.at(0).variant.toString());
                     } else {
@@ -1563,7 +1563,7 @@ public:
         const QMetaObject *metaObject = OBJECT_PTR(node)->metaObject();
 #if QT_CONFIG(tooltip)
         if (qstrcmp(metaObject->className(), "QTipLabel") == 0)
-            return QStringList(QLatin1String("QToolTip"));
+            return QStringList("QToolTip"_L1);
 #endif
         QStringList result;
         do {
@@ -1629,7 +1629,7 @@ public:
         const QMetaObject *metaObject = OBJECT_PTR(node)->metaObject();
 #if QT_CONFIG(tooltip)
         if (qstrcmp(metaObject->className(), "QTipLabel") == 0)
-            return nodeName == QLatin1String("QToolTip");
+            return nodeName == "QToolTip"_L1;
 #endif
         do {
             const ushort *uc = (const ushort *)nodeName.constData();
@@ -1694,7 +1694,7 @@ QList<QCss::StyleRule> QStyleSheetStyle::styleRules(const QObject *obj) const
         QHash<const void *, StyleSheet>::const_iterator appCacheIt = styleSheetCaches->styleSheetCache.constFind(qApp);
         if (appCacheIt == styleSheetCaches->styleSheetCache.constEnd()) {
             QString ss = qApp->styleSheet();
-            if (ss.startsWith(QLatin1String("file:///")))
+            if (ss.startsWith("file:///"_L1))
                 ss.remove(0, 8);
             parser.init(ss, qApp->styleSheet() != ss);
             if (Q_UNLIKELY(!parser.parse(&appSs)))
@@ -1718,7 +1718,7 @@ QList<QCss::StyleRule> QStyleSheetStyle::styleRules(const QObject *obj) const
         if (objCacheIt == styleSheetCaches->styleSheetCache.constEnd()) {
             parser.init(styleSheet);
             if (!parser.parse(&ss)) {
-                parser.init(QLatin1String("* {") + styleSheet + u'}');
+                parser.init("* {"_L1 + styleSheet + u'}');
                 if (Q_UNLIKELY(!parser.parse(&ss)))
                    qWarning() << "Could not parse stylesheet of object" << o;
             }
@@ -1855,9 +1855,9 @@ static void qt_check_if_internal_object(const QObject **obj, int *element)
     Q_UNUSED(element);
 #else
     if (*obj && qstrcmp((*obj)->metaObject()->className(), "QDockWidgetTitleButton") == 0) {
-        if ((*obj)->objectName() == QLatin1String("qt_dockwidget_closebutton")) {
+        if ((*obj)->objectName() == "qt_dockwidget_closebutton"_L1) {
             *element = PseudoElement_DockWidgetCloseButton;
-        } else if ((*obj)->objectName() == QLatin1String("qt_dockwidget_floatbutton")) {
+        } else if ((*obj)->objectName() == "qt_dockwidget_floatbutton"_L1) {
             *element = PseudoElement_DockWidgetFloatButton;
         }
         *obj = (*obj)->parent();
@@ -2673,7 +2673,7 @@ void QStyleSheetStyle::setProperties(QWidget *w)
         QDuplicateTracker<QString> propertySet(decls.size());
         for (int i = decls.count() - 1; i >= 0; --i) {
             const QString property = decls.at(i).d->property;
-            if (!property.startsWith(QLatin1String("qproperty-"), Qt::CaseInsensitive))
+            if (!property.startsWith("qproperty-"_L1, Qt::CaseInsensitive))
                 continue;
             if (!propertySet.hasSeen(property))
                 finals.append(i);
@@ -3510,9 +3510,9 @@ void QStyleSheetStyle::drawComplexControl(ComplexControl cc, const QStyleOptionC
         if (hasStyleRule(w, PseudoElement_MdiCloseButton)
             || hasStyleRule(w, PseudoElement_MdiNormalButton)
             || hasStyleRule(w, PseudoElement_MdiMinButton)) {
-            QList<QVariant> layout = rule.styleHint(QLatin1String("button-layout")).toList();
+            QList<QVariant> layout = rule.styleHint("button-layout"_L1).toList();
             if (layout.isEmpty())
-                layout = subControlLayout(QLatin1String("mNX"));
+                layout = subControlLayout("mNX"_L1);
 
             QStyleOptionComplex optCopy(*opt);
             optCopy.subControls = { };
@@ -5170,9 +5170,8 @@ int QStyleSheetStyle::pixelMetric(PixelMetric m, const QStyleOption *opt, const
     case PM_MessageBoxIconSize:
     case PM_ButtonIconSize:
     case PM_SmallIconSize:
-        if (rule.hasStyleHint(QLatin1String("icon-size"))) {
-            return rule.styleHint(QLatin1String("icon-size")).toSize().width();
-        }
+        if (rule.hasStyleHint("icon-size"_L1))
+            return rule.styleHint("icon-size"_L1).toSize().width();
         break;
 
     case PM_DockWidgetTitleMargin: {
@@ -5458,9 +5457,9 @@ QSize QStyleSheetStyle::sizeFromContents(ContentsType ct, const QStyleOption *op
                 && !hasStyleRule(w, PseudoElement_MdiMinButton))
                 break;
 
-            QList<QVariant> layout = rule.styleHint(QLatin1String("button-layout")).toList();
+            QList<QVariant> layout = rule.styleHint("button-layout"_L1).toList();
             if (layout.isEmpty())
-                layout = subControlLayout(QLatin1String("mNX"));
+                layout = subControlLayout("mNX"_L1);
 
             int width = 0, height = 0;
             for (int i = 0; i < layout.count(); i++) {
@@ -5505,62 +5504,62 @@ QSize QStyleSheetStyle::sizeFromContents(ContentsType ct, const QStyleOption *op
 static QLatin1String propertyNameForStandardPixmap(QStyle::StandardPixmap sp)
 {
     switch (sp) {
-        case QStyle::SP_TitleBarMenuButton: return QLatin1String("titlebar-menu-icon");
-        case QStyle::SP_TitleBarMinButton: return QLatin1String("titlebar-minimize-icon");
-        case QStyle::SP_TitleBarMaxButton: return QLatin1String("titlebar-maximize-icon");
-        case QStyle::SP_TitleBarCloseButton: return QLatin1String("titlebar-close-icon");
-        case QStyle::SP_TitleBarNormalButton: return QLatin1String("titlebar-normal-icon");
-        case QStyle::SP_TitleBarShadeButton: return QLatin1String("titlebar-shade-icon");
-        case QStyle::SP_TitleBarUnshadeButton: return QLatin1String("titlebar-unshade-icon");
-        case QStyle::SP_TitleBarContextHelpButton: return QLatin1String("titlebar-contexthelp-icon");
-        case QStyle::SP_DockWidgetCloseButton: return QLatin1String("dockwidget-close-icon");
-        case QStyle::SP_MessageBoxInformation: return QLatin1String("messagebox-information-icon");
-        case QStyle::SP_MessageBoxWarning: return QLatin1String("messagebox-warning-icon");
-        case QStyle::SP_MessageBoxCritical: return QLatin1String("messagebox-critical-icon");
-        case QStyle::SP_MessageBoxQuestion: return QLatin1String("messagebox-question-icon");
-        case QStyle::SP_DesktopIcon: return QLatin1String("desktop-icon");
-        case QStyle::SP_TrashIcon: return QLatin1String("trash-icon");
-        case QStyle::SP_ComputerIcon: return QLatin1String("computer-icon");
-        case QStyle::SP_DriveFDIcon: return QLatin1String("floppy-icon");
-        case QStyle::SP_DriveHDIcon: return QLatin1String("harddisk-icon");
-        case QStyle::SP_DriveCDIcon: return QLatin1String("cd-icon");
-        case QStyle::SP_DriveDVDIcon: return QLatin1String("dvd-icon");
-        case QStyle::SP_DriveNetIcon: return QLatin1String("network-icon");
-        case QStyle::SP_DirOpenIcon: return QLatin1String("directory-open-icon");
-        case QStyle::SP_DirClosedIcon: return QLatin1String("directory-closed-icon");
-        case QStyle::SP_DirLinkIcon: return QLatin1String("directory-link-icon");
-        case QStyle::SP_FileIcon: return QLatin1String("file-icon");
-        case QStyle::SP_FileLinkIcon: return QLatin1String("file-link-icon");
-        case QStyle::SP_FileDialogStart: return QLatin1String("filedialog-start-icon");
-        case QStyle::SP_FileDialogEnd: return QLatin1String("filedialog-end-icon");
-        case QStyle::SP_FileDialogToParent: return QLatin1String("filedialog-parent-directory-icon");
-        case QStyle::SP_FileDialogNewFolder: return QLatin1String("filedialog-new-directory-icon");
-        case QStyle::SP_FileDialogDetailedView: return QLatin1String("filedialog-detailedview-icon");
-        case QStyle::SP_FileDialogInfoView: return QLatin1String("filedialog-infoview-icon");
-        case QStyle::SP_FileDialogContentsView: return QLatin1String("filedialog-contentsview-icon");
-        case QStyle::SP_FileDialogListView: return QLatin1String("filedialog-listview-icon");
-        case QStyle::SP_FileDialogBack: return QLatin1String("filedialog-backward-icon");
-        case QStyle::SP_DirIcon: return QLatin1String("directory-icon");
-        case QStyle::SP_DialogOkButton: return QLatin1String("dialog-ok-icon");
-        case QStyle::SP_DialogCancelButton: return QLatin1String("dialog-cancel-icon");
-        case QStyle::SP_DialogHelpButton: return QLatin1String("dialog-help-icon");
-        case QStyle::SP_DialogOpenButton: return QLatin1String("dialog-open-icon");
-        case QStyle::SP_DialogSaveButton: return QLatin1String("dialog-save-icon");
-        case QStyle::SP_DialogCloseButton: return QLatin1String("dialog-close-icon");
-        case QStyle::SP_DialogApplyButton: return QLatin1String("dialog-apply-icon");
-        case QStyle::SP_DialogResetButton: return QLatin1String("dialog-reset-icon");
-        case QStyle::SP_DialogDiscardButton: return QLatin1String("dialog-discard-icon");
-        case QStyle::SP_DialogYesButton: return QLatin1String("dialog-yes-icon");
-        case QStyle::SP_DialogNoButton: return QLatin1String("dialog-no-icon");
-        case QStyle::SP_ArrowUp: return QLatin1String("uparrow-icon");
-        case QStyle::SP_ArrowDown: return QLatin1String("downarrow-icon");
-        case QStyle::SP_ArrowLeft: return QLatin1String("leftarrow-icon");
-        case QStyle::SP_ArrowRight: return QLatin1String("rightarrow-icon");
-        case QStyle::SP_ArrowBack: return QLatin1String("backward-icon");
-        case QStyle::SP_ArrowForward: return QLatin1String("forward-icon");
-        case QStyle::SP_DirHomeIcon: return QLatin1String("home-icon");
-        case QStyle::SP_LineEditClearButton: return QLatin1String("lineedit-clear-button-icon");
-        default: return QLatin1String("");
+        case QStyle::SP_TitleBarMenuButton: return "titlebar-menu-icon"_L1;
+        case QStyle::SP_TitleBarMinButton: return "titlebar-minimize-icon"_L1;
+        case QStyle::SP_TitleBarMaxButton: return "titlebar-maximize-icon"_L1;
+        case QStyle::SP_TitleBarCloseButton: return "titlebar-close-icon"_L1;
+        case QStyle::SP_TitleBarNormalButton: return "titlebar-normal-icon"_L1;
+        case QStyle::SP_TitleBarShadeButton: return "titlebar-shade-icon"_L1;
+        case QStyle::SP_TitleBarUnshadeButton: return "titlebar-unshade-icon"_L1;
+        case QStyle::SP_TitleBarContextHelpButton: return "titlebar-contexthelp-icon"_L1;
+        case QStyle::SP_DockWidgetCloseButton: return "dockwidget-close-icon"_L1;
+        case QStyle::SP_MessageBoxInformation: return "messagebox-information-icon"_L1;
+        case QStyle::SP_MessageBoxWarning: return "messagebox-warning-icon"_L1;
+        case QStyle::SP_MessageBoxCritical: return "messagebox-critical-icon"_L1;
+        case QStyle::SP_MessageBoxQuestion: return "messagebox-question-icon"_L1;
+        case QStyle::SP_DesktopIcon: return "desktop-icon"_L1;
+        case QStyle::SP_TrashIcon: return "trash-icon"_L1;
+        case QStyle::SP_ComputerIcon: return "computer-icon"_L1;
+        case QStyle::SP_DriveFDIcon: return "floppy-icon"_L1;
+        case QStyle::SP_DriveHDIcon: return "harddisk-icon"_L1;
+        case QStyle::SP_DriveCDIcon: return "cd-icon"_L1;
+        case QStyle::SP_DriveDVDIcon: return "dvd-icon"_L1;
+        case QStyle::SP_DriveNetIcon: return "network-icon"_L1;
+        case QStyle::SP_DirOpenIcon: return "directory-open-icon"_L1;
+        case QStyle::SP_DirClosedIcon: return "directory-closed-icon"_L1;
+        case QStyle::SP_DirLinkIcon: return "directory-link-icon"_L1;
+        case QStyle::SP_FileIcon: return "file-icon"_L1;
+        case QStyle::SP_FileLinkIcon: return "file-link-icon"_L1;
+        case QStyle::SP_FileDialogStart: return "filedialog-start-icon"_L1;
+        case QStyle::SP_FileDialogEnd: return "filedialog-end-icon"_L1;
+        case QStyle::SP_FileDialogToParent: return "filedialog-parent-directory-icon"_L1;
+        case QStyle::SP_FileDialogNewFolder: return "filedialog-new-directory-icon"_L1;
+        case QStyle::SP_FileDialogDetailedView: return "filedialog-detailedview-icon"_L1;
+        case QStyle::SP_FileDialogInfoView: return "filedialog-infoview-icon"_L1;
+        case QStyle::SP_FileDialogContentsView: return "filedialog-contentsview-icon"_L1;
+        case QStyle::SP_FileDialogListView: return "filedialog-listview-icon"_L1;
+        case QStyle::SP_FileDialogBack: return "filedialog-backward-icon"_L1;
+        case QStyle::SP_DirIcon: return "directory-icon"_L1;
+        case QStyle::SP_DialogOkButton: return "dialog-ok-icon"_L1;
+        case QStyle::SP_DialogCancelButton: return "dialog-cancel-icon"_L1;
+        case QStyle::SP_DialogHelpButton: return "dialog-help-icon"_L1;
+        case QStyle::SP_DialogOpenButton: return "dialog-open-icon"_L1;
+        case QStyle::SP_DialogSaveButton: return "dialog-save-icon"_L1;
+        case QStyle::SP_DialogCloseButton: return "dialog-close-icon"_L1;
+        case QStyle::SP_DialogApplyButton: return "dialog-apply-icon"_L1;
+        case QStyle::SP_DialogResetButton: return "dialog-reset-icon"_L1;
+        case QStyle::SP_DialogDiscardButton: return "dialog-discard-icon"_L1;
+        case QStyle::SP_DialogYesButton: return "dialog-yes-icon"_L1;
+        case QStyle::SP_DialogNoButton: return "dialog-no-icon"_L1;
+        case QStyle::SP_ArrowUp: return "uparrow-icon"_L1;
+        case QStyle::SP_ArrowDown: return "downarrow-icon"_L1;
+        case QStyle::SP_ArrowLeft: return "leftarrow-icon"_L1;
+        case QStyle::SP_ArrowRight: return "rightarrow-icon"_L1;
+        case QStyle::SP_ArrowBack: return "backward-icon"_L1;
+        case QStyle::SP_ArrowForward: return "forward-icon"_L1;
+        case QStyle::SP_DirHomeIcon: return "home-icon"_L1;
+        case QStyle::SP_LineEditClearButton: return "lineedit-clear-button-icon"_L1;
+        default: return ""_L1;
     }
 }
 
@@ -5616,25 +5615,25 @@ int QStyleSheetStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWi
     QRenderRule rule = renderRule(w, opt);
     QString s;
     switch (sh) {
-        case SH_LineEdit_PasswordCharacter: s = QLatin1String("lineedit-password-character"); break;
-        case SH_LineEdit_PasswordMaskDelay: s = QLatin1String("lineedit-password-mask-delay"); break;
-        case SH_DitherDisabledText: s = QLatin1String("dither-disabled-text"); break;
-        case SH_EtchDisabledText: s = QLatin1String("etch-disabled-text"); break;
-        case SH_ItemView_ActivateItemOnSingleClick: s = QLatin1String("activate-on-singleclick"); break;
-        case SH_ItemView_ShowDecorationSelected: s = QLatin1String("show-decoration-selected"); break;
-        case SH_Table_GridLineColor: s = QLatin1String("gridline-color"); break;
-        case SH_DialogButtonLayout: s = QLatin1String("button-layout"); break;
-        case SH_ToolTipLabel_Opacity: s = QLatin1String("opacity"); break;
-        case SH_ComboBox_Popup: s = QLatin1String("combobox-popup"); break;
-        case SH_ComboBox_ListMouseTracking: s = QLatin1String("combobox-list-mousetracking"); break;
-        case SH_MenuBar_AltKeyNavigation: s = QLatin1String("menubar-altkey-navigation"); break;
-        case SH_Menu_Scrollable: s = QLatin1String("menu-scrollable"); break;
-        case SH_DrawMenuBarSeparator: s = QLatin1String("menubar-separator"); break;
-        case SH_MenuBar_MouseTracking: s = QLatin1String("mouse-tracking"); break;
-        case SH_SpinBox_ClickAutoRepeatRate: s = QLatin1String("spinbox-click-autorepeat-rate"); break;
-        case SH_SpinControls_DisableOnBounds: s = QLatin1String("spincontrol-disable-on-bounds"); break;
-        case SH_MessageBox_TextInteractionFlags: s = QLatin1String("messagebox-text-interaction-flags"); break;
-        case SH_ToolButton_PopupDelay: s = QLatin1String("toolbutton-popup-delay"); break;
+        case SH_LineEdit_PasswordCharacter: s = "lineedit-password-character"_L1; break;
+        case SH_LineEdit_PasswordMaskDelay: s = "lineedit-password-mask-delay"_L1; break;
+        case SH_DitherDisabledText: s = "dither-disabled-text"_L1; break;
+        case SH_EtchDisabledText: s = "etch-disabled-text"_L1; break;
+        case SH_ItemView_ActivateItemOnSingleClick: s = "activate-on-singleclick"_L1; break;
+        case SH_ItemView_ShowDecorationSelected: s = "show-decoration-selected"_L1; break;
+        case SH_Table_GridLineColor: s = "gridline-color"_L1; break;
+        case SH_DialogButtonLayout: s = "button-layout"_L1; break;
+        case SH_ToolTipLabel_Opacity: s = "opacity"_L1; break;
+        case SH_ComboBox_Popup: s = "combobox-popup"_L1; break;
+        case SH_ComboBox_ListMouseTracking: s = "combobox-list-mousetracking"_L1; break;
+        case SH_MenuBar_AltKeyNavigation: s = "menubar-altkey-navigation"_L1; break;
+        case SH_Menu_Scrollable: s = "menu-scrollable"_L1; break;
+        case SH_DrawMenuBarSeparator: s = "menubar-separator"_L1; break;
+        case SH_MenuBar_MouseTracking: s = "mouse-tracking"_L1; break;
+        case SH_SpinBox_ClickAutoRepeatRate: s = "spinbox-click-autorepeat-rate"_L1; break;
+        case SH_SpinControls_DisableOnBounds: s = "spincontrol-disable-on-bounds"_L1; break;
+        case SH_MessageBox_TextInteractionFlags: s = "messagebox-text-interaction-flags"_L1; break;
+        case SH_ToolButton_PopupDelay: s = "toolbutton-popup-delay"_L1; break;
         case SH_ToolBox_SelectedPageTitleBold:
             if (renderRule(w, opt, PseudoElement_ToolBoxTab).hasFont)
                 return 0;
@@ -5643,12 +5642,12 @@ int QStyleSheetStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWi
             if (rule.hasPalette() && rule.palette()->foreground.style() != Qt::NoBrush)
                 return rule.palette()->foreground.color().rgba();
             break;
-        case SH_ScrollView_FrameOnlyAroundContents: s = QLatin1String("scrollview-frame-around-contents"); break;
-        case SH_ScrollBar_ContextMenu: s = QLatin1String("scrollbar-contextmenu"); break;
-        case SH_ScrollBar_LeftClickAbsolutePosition: s = QLatin1String("scrollbar-leftclick-absolute-position"); break;
-        case SH_ScrollBar_MiddleClickAbsolutePosition: s = QLatin1String("scrollbar-middleclick-absolute-position"); break;
-        case SH_ScrollBar_RollBetweenButtons: s = QLatin1String("scrollbar-roll-between-buttons"); break;
-        case SH_ScrollBar_ScrollWhenPointerLeavesControl: s = QLatin1String("scrollbar-scroll-when-pointer-leaves-control"); break;
+        case SH_ScrollView_FrameOnlyAroundContents: s = "scrollview-frame-around-contents"_L1; break;
+        case SH_ScrollBar_ContextMenu: s = "scrollbar-contextmenu"_L1; break;
+        case SH_ScrollBar_LeftClickAbsolutePosition: s = "scrollbar-leftclick-absolute-position"_L1; break;
+        case SH_ScrollBar_MiddleClickAbsolutePosition: s = "scrollbar-middleclick-absolute-position"_L1; break;
+        case SH_ScrollBar_RollBetweenButtons: s = "scrollbar-roll-between-buttons"_L1; break;
+        case SH_ScrollBar_ScrollWhenPointerLeavesControl: s = "scrollbar-scroll-when-pointer-leaves-control"_L1; break;
         case SH_TabBar_Alignment:
 #if QT_CONFIG(tabwidget)
             if (qobject_cast<const QTabWidget *>(w)) {
@@ -5657,7 +5656,7 @@ int QStyleSheetStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWi
                     return rule.position()->position;
             }
 #endif // QT_CONFIG(tabwidget)
-            s = QLatin1String("alignment");
+            s = "alignment"_L1;
             break;
 #if QT_CONFIG(tabbar)
         case SH_TabBar_CloseButtonPosition:
@@ -5671,8 +5670,8 @@ int QStyleSheetStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWi
             }
             break;
 #endif
-        case SH_TabBar_ElideMode: s = QLatin1String("tabbar-elide-mode"); break;
-        case SH_TabBar_PreferNoArrows: s = QLatin1String("tabbar-prefer-no-arrows"); break;
+        case SH_TabBar_ElideMode: s = "tabbar-elide-mode"_L1; break;
+        case SH_TabBar_PreferNoArrows: s = "tabbar-prefer-no-arrows"_L1; break;
         case SH_ComboBox_PopupFrameStyle:
 #if QT_CONFIG(combobox)
             if (qobject_cast<const QComboBox *>(w)) {
@@ -5686,8 +5685,8 @@ int QStyleSheetStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWi
             }
 #endif // QT_CONFIG(combobox)
             break;
-        case SH_DialogButtonBox_ButtonsHaveIcons: s = QLatin1String("dialogbuttonbox-buttons-have-icons"); break;
-        case SH_Workspace_FillSpaceOnMaximize: s = QLatin1String("mdi-fill-space-on-maximize"); break;
+        case SH_DialogButtonBox_ButtonsHaveIcons: s = "dialogbuttonbox-buttons-have-icons"_L1; break;
+        case SH_Workspace_FillSpaceOnMaximize: s = "mdi-fill-space-on-maximize"_L1; break;
         case SH_TitleBar_NoBorder:
             if (rule.hasBorder())
                 return !rule.border()->borders[LeftEdge];
@@ -5698,10 +5697,10 @@ int QStyleSheetStyle::styleHint(StyleHint sh, const QStyleOption *opt, const QWi
                 return 1;
             break;
                                    }
-        case SH_ItemView_ArrowKeysNavigateIntoChildren: s = QLatin1String("arrow-keys-navigate-into-children"); break;
-        case SH_ItemView_PaintAlternatingRowColorsForEmptyArea: s = QLatin1String("paint-alternating-row-colors-for-empty-area"); break;
-        case SH_TitleBar_ShowToolTipsOnButtons: s = QLatin1String("titlebar-show-tooltips-on-buttons"); break;
-        case SH_Widget_Animation_Duration: s = QLatin1String("widget-animation-duration"); break;
+        case SH_ItemView_ArrowKeysNavigateIntoChildren: s = "arrow-keys-navigate-into-children"_L1; break;
+        case SH_ItemView_PaintAlternatingRowColorsForEmptyArea: s = "paint-alternating-row-colors-for-empty-area"_L1; break;
+        case SH_TitleBar_ShowToolTipsOnButtons: s = "titlebar-show-tooltips-on-buttons"_L1; break;
+        case SH_Widget_Animation_Duration: s = "widget-animation-duration"_L1; break;
         case SH_ScrollBar_Transient:
             if (!rule.hasNativeBorder() || rule.hasBox())
                 return 0;
@@ -6024,9 +6023,9 @@ QRect QStyleSheetStyle::subControlRect(ComplexControl cc, const QStyleOptionComp
         if (hasStyleRule(w, PseudoElement_MdiCloseButton)
             || hasStyleRule(w, PseudoElement_MdiNormalButton)
             || hasStyleRule(w, PseudoElement_MdiMinButton)) {
-            QList<QVariant> layout = rule.styleHint(QLatin1String("button-layout")).toList();
+            QList<QVariant> layout = rule.styleHint("button-layout"_L1).toList();
             if (layout.isEmpty())
-                layout = subControlLayout(QLatin1String("mNX"));
+                layout = subControlLayout("mNX"_L1);
 
             int x = 0, width = 0;
             QRenderRule subRule;
@@ -6350,7 +6349,7 @@ void QStyleSheetStyle::updateStyleSheetFont(QWidget* w) const
 {
     // Qt's fontDialog relies on the font of the sample edit for its selection,
     // we should never override it.
-    if (w->objectName() == QLatin1String("qt_fontDialog_sampleEdit"))
+    if (w->objectName() == "qt_fontDialog_sampleEdit"_L1)
         return;
 
     QWidget *container = containerWidget(w);
@@ -6448,7 +6447,7 @@ Qt::Alignment QStyleSheetStyle::resolveAlignment(Qt::LayoutDirection layDir, Qt:
 // (and hence has the correct object name).
 bool QStyleSheetStyle::isNaturalChild(const QObject *obj)
 {
-    if (obj->objectName().startsWith(QLatin1String("qt_")))
+    if (obj->objectName().startsWith("qt_"_L1))
         return true;
 
     return false;
diff --git a/src/widgets/styles/qstylesheetstyle_default.cpp b/src/widgets/styles/qstylesheetstyle_default.cpp
index 25a00e1852..d9405c3a7b 100644
--- a/src/widgets/styles/qstylesheetstyle_default.cpp
+++ b/src/widgets/styles/qstylesheetstyle_default.cpp
@@ -54,6 +54,7 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
 using namespace QCss;
 
 // This is the class name of the selector.
@@ -164,19 +165,19 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-style-features: background-color;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QLineEdit"));
+        SET_ELEMENT_NAME("QLineEdit"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Base);
         ADD_DECLARATION;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
-        SET_PROPERTY(QLatin1String("-qt-style-features"), QtStyleFeatures);
+        SET_PROPERTY("-qt-style-features"_L1, QtStyleFeatures);
         ADD_VALUE(Value::Identifier, QString::fromLatin1("background-color"));
         ADD_DECLARATION;
 
@@ -187,12 +188,12 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border: none;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QLineEdit"));
-        ADD_PSEUDO(QLatin1String("no-frame"), PseudoClass_Frameless);
+        SET_ELEMENT_NAME("QLineEdit"_L1);
+        ADD_PSEUDO("no-frame"_L1, PseudoClass_Frameless);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_None);
         ADD_DECLARATION;
 
@@ -203,11 +204,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border: native;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QFrame"));
+        SET_ELEMENT_NAME("QFrame"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
@@ -219,19 +220,19 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border-image: none;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QLabel"));
+        SET_ELEMENT_NAME("QLabel"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_ELEMENT_NAME(QLatin1String("QToolBox"));
+        SET_ELEMENT_NAME("QToolBox"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("background"), Background);
+        SET_PROPERTY("background"_L1, Background);
         ADD_VALUE(Value::KnownIdentifier, Value_None);
         ADD_DECLARATION;
 
-        SET_PROPERTY(QLatin1String("border-image"), BorderImage);
+        SET_PROPERTY("border-image"_L1, BorderImage);
         ADD_VALUE(Value::KnownIdentifier, Value_None);
         ADD_DECLARATION;
 
@@ -242,11 +243,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border: native;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QGroupBox"));
+        SET_ELEMENT_NAME("QGroupBox"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
@@ -259,15 +260,15 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border: native;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QToolTip"));
+        SET_ELEMENT_NAME("QToolTip"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Window);
         ADD_DECLARATION;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
@@ -279,20 +280,20 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-style-features: background-color;  //only for not pixmap based styles
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QPushButton"));
+        SET_ELEMENT_NAME("QPushButton"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_ELEMENT_NAME(QLatin1String("QToolButton"));
+        SET_ELEMENT_NAME("QToolButton"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border-style"), BorderStyles);
+        SET_PROPERTY("border-style"_L1, BorderStyles);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
         if (!styleIsPixmapBased) {
-            SET_PROPERTY(QLatin1String("-qt-style-features"), QtStyleFeatures);
+            SET_PROPERTY("-qt-style-features"_L1, QtStyleFeatures);
             ADD_VALUE(Value::Identifier, QString::fromLatin1("background-color"));
             ADD_DECLARATION;
         }
@@ -309,22 +310,22 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
     }*/
 
     {
-        SET_ELEMENT_NAME(QLatin1String("QComboBox"));
+        SET_ELEMENT_NAME("QComboBox"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
         if (!styleIsPixmapBased) {
-            SET_PROPERTY(QLatin1String("-qt-style-features"), QtStyleFeatures);
+            SET_PROPERTY("-qt-style-features"_L1, QtStyleFeatures);
             ADD_VALUE(Value::Identifier, QString::fromLatin1("background-color"));
             ADD_VALUE(Value::Identifier, QString::fromLatin1("background-gradient"));
             ADD_DECLARATION;
         }
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Base);
         ADD_DECLARATION;
 
@@ -339,12 +340,12 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
     }*/
     if (baseStyle()->inherits("QPlastiqueStyle")  || baseStyle()->inherits("QCleanlooksStyle") || baseStyle()->inherits("QFusionStyle"))
     {
-        SET_ELEMENT_NAME(QLatin1String("QComboBox"));
-        ADD_ATTRIBUTE_SELECTOR(QLatin1String("readOnly"), QLatin1String("true"), AttributeSelector::MatchEqual);
+        SET_ELEMENT_NAME("QComboBox"_L1);
+        ADD_ATTRIBUTE_SELECTOR("readOnly"_L1, "true"_L1, AttributeSelector::MatchEqual);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Button);
         ADD_DECLARATION;
 
@@ -357,19 +358,19 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-background-role: base;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QAbstractSpinBox"));
+        SET_ELEMENT_NAME("QAbstractSpinBox"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
-        SET_PROPERTY(QLatin1String("-qt-style-features"), QtStyleFeatures);
+        SET_PROPERTY("-qt-style-features"_L1, QtStyleFeatures);
         ADD_VALUE(Value::Identifier, QString::fromLatin1("background-color"));
         ADD_DECLARATION;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Base);
         ADD_DECLARATION;
 
@@ -380,11 +381,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-background-role: window;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QMenu"));
+        SET_ELEMENT_NAME("QMenu"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Window);
         ADD_DECLARATION;
 
@@ -394,12 +395,12 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-style-features: background-color;
     }*/
     if (!styleIsPixmapBased) {
-        SET_ELEMENT_NAME(QLatin1String("QMenu"));
-        ADD_PSEUDO(QLatin1String("item"), PseudoClass_Unknown);
+        SET_ELEMENT_NAME("QMenu"_L1);
+        ADD_PSEUDO("item"_L1, PseudoClass_Unknown);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-style-features"), QtStyleFeatures);
+        SET_PROPERTY("-qt-style-features"_L1, QtStyleFeatures);
         ADD_VALUE(Value::Identifier, QString::fromLatin1("background-color"));
         ADD_DECLARATION;
 
@@ -410,11 +411,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-background-role: window;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QHeaderView"));
+        SET_ELEMENT_NAME("QHeaderView"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Window);
         ADD_DECLARATION;
 
@@ -427,27 +428,27 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border: native;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QTableCornerButton"));
-        ADD_PSEUDO(QLatin1String("section"), PseudoClass_Unknown);
+        SET_ELEMENT_NAME("QTableCornerButton"_L1);
+        ADD_PSEUDO("section"_L1, PseudoClass_Unknown);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_ELEMENT_NAME(QLatin1String("QHeaderView"));
-        ADD_PSEUDO(QLatin1String("section"), PseudoClass_Unknown);
+        SET_ELEMENT_NAME("QHeaderView"_L1);
+        ADD_PSEUDO("section"_L1, PseudoClass_Unknown);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Button);
         ADD_DECLARATION;
 
         if (!styleIsPixmapBased) {
-            SET_PROPERTY(QLatin1String("-qt-style-features"), QtStyleFeatures);
+            SET_PROPERTY("-qt-style-features"_L1, QtStyleFeatures);
             ADD_VALUE(Value::Identifier, QString::fromLatin1("background-color"));
             ADD_DECLARATION;
         }
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
@@ -458,11 +459,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-background-role: base;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QProgressBar"));
+        SET_ELEMENT_NAME("QProgressBar"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Base);
         ADD_DECLARATION;
 
@@ -473,11 +474,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         -qt-background-role: window;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QScrollBar"));
+        SET_ELEMENT_NAME("QScrollBar"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("-qt-background-role"), QtBackgroundRole);
+        SET_PROPERTY("-qt-background-role"_L1, QtBackgroundRole);
         ADD_VALUE(Value::KnownIdentifier, Value_Window);
         ADD_DECLARATION;
 
@@ -488,11 +489,11 @@ StyleSheet QStyleSheetStyle::getDefaultStyleSheet() const
         border: native;
     }*/
     {
-        SET_ELEMENT_NAME(QLatin1String("QDockWidget"));
+        SET_ELEMENT_NAME("QDockWidget"_L1);
         ADD_BASIC_SELECTOR;
         ADD_SELECTOR;
 
-        SET_PROPERTY(QLatin1String("border"), Border);
+        SET_PROPERTY("border"_L1, Border);
         ADD_VALUE(Value::KnownIdentifier, Value_Native);
         ADD_DECLARATION;
 
diff --git a/src/widgets/util/qcompleter.cpp b/src/widgets/util/qcompleter.cpp
index d4911912d0..6ef0791ce1 100644
--- a/src/widgets/util/qcompleter.cpp
+++ b/src/widgets/util/qcompleter.cpp
@@ -166,6 +166,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QCompletionModel::QCompletionModel(QCompleterPrivate *c, QObject *parent)
     : QAbstractProxyModel(*new QCompletionModelPrivate, parent),
       c(c), showAll(false)
@@ -1878,9 +1880,9 @@ QStringList QCompleter::splitPath(const QString& path) const
 
     QString pathCopy = QDir::toNativeSeparators(path);
 #if defined(Q_OS_WIN)
-    if (pathCopy == QLatin1String("\\") || pathCopy == QLatin1String("\\\\"))
+    if (pathCopy == "\\"_L1 || pathCopy == "\\\\"_L1)
         return QStringList(pathCopy);
-    const bool startsWithDoubleSlash = pathCopy.startsWith(QLatin1String("\\\\"));
+    const bool startsWithDoubleSlash = pathCopy.startsWith("\\\\"_L1);
     if (startsWithDoubleSlash)
         pathCopy = pathCopy.mid(2);
 #endif
@@ -1890,7 +1892,7 @@ QStringList QCompleter::splitPath(const QString& path) const
 
 #if defined(Q_OS_WIN)
     if (startsWithDoubleSlash)
-        parts[0].prepend(QLatin1String("\\\\"));
+        parts[0].prepend("\\\\"_L1);
 #else
     if (pathCopy[0] == sep) // readd the "/" at the beginning as the split removed it
         parts[0] = u'/';
diff --git a/src/widgets/util/qsystemtrayicon_x11.cpp b/src/widgets/util/qsystemtrayicon_x11.cpp
index 3099b0b3e7..c4da56a08c 100644
--- a/src/widgets/util/qsystemtrayicon_x11.cpp
+++ b/src/widgets/util/qsystemtrayicon_x11.cpp
@@ -66,6 +66,8 @@
 #ifndef QT_NO_SYSTEMTRAYICON
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 static inline unsigned long locateSystemTray()
 {
     return (unsigned long)QGuiApplication::platformNativeInterface()->nativeResourceForScreen(QByteArrayLiteral("traywindow"), QGuiApplication::primaryScreen());
@@ -321,7 +323,7 @@ bool QSystemTrayIconPrivate::isSystemTrayAvailable_sys()
 
     // no QPlatformSystemTrayIcon so fall back to default xcb platform behavior
     const QString platform = QGuiApplication::platformName();
-    if (platform.compare(QLatin1String("xcb"), Qt::CaseInsensitive) == 0)
+    if (platform.compare("xcb"_L1, Qt::CaseInsensitive) == 0)
        return locateSystemTray();
     return false;
 }
diff --git a/src/widgets/widgets/qabstractscrollarea.cpp b/src/widgets/widgets/qabstractscrollarea.cpp
index 627dbaa1d6..5ac9988a36 100644
--- a/src/widgets/widgets/qabstractscrollarea.cpp
+++ b/src/widgets/widgets/qabstractscrollarea.cpp
@@ -68,6 +68,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     \class QAbstractScrollArea
     \brief The QAbstractScrollArea widget provides a scrolling area with
@@ -282,11 +284,11 @@ void QAbstractScrollAreaPrivate::init()
 {
     Q_Q(QAbstractScrollArea);
     viewport = new QWidget(q);
-    viewport->setObjectName(QLatin1String("qt_scrollarea_viewport"));
+    viewport->setObjectName("qt_scrollarea_viewport"_L1);
     viewport->setBackgroundRole(QPalette::Base);
     viewport->setAutoFillBackground(true);
     scrollBarContainers[Qt::Horizontal] = new QAbstractScrollAreaScrollBarContainer(Qt::Horizontal, q);
-    scrollBarContainers[Qt::Horizontal]->setObjectName(QLatin1String("qt_scrollarea_hcontainer"));
+    scrollBarContainers[Qt::Horizontal]->setObjectName("qt_scrollarea_hcontainer"_L1);
     hbar = scrollBarContainers[Qt::Horizontal]->scrollBar;
     hbar->setRange(0,0);
     scrollBarContainers[Qt::Horizontal]->setVisible(false);
@@ -294,7 +296,7 @@ void QAbstractScrollAreaPrivate::init()
     QObject::connect(hbar, SIGNAL(valueChanged(int)), q, SLOT(_q_hslide(int)));
     QObject::connect(hbar, SIGNAL(rangeChanged(int,int)), q, SLOT(_q_showOrHideScrollBars()), Qt::QueuedConnection);
     scrollBarContainers[Qt::Vertical] = new QAbstractScrollAreaScrollBarContainer(Qt::Vertical, q);
-    scrollBarContainers[Qt::Vertical]->setObjectName(QLatin1String("qt_scrollarea_vcontainer"));
+    scrollBarContainers[Qt::Vertical]->setObjectName("qt_scrollarea_vcontainer"_L1);
     vbar = scrollBarContainers[Qt::Vertical]->scrollBar;
     vbar->setRange(0,0);
     scrollBarContainers[Qt::Vertical]->setVisible(false);
diff --git a/src/widgets/widgets/qabstractspinbox.cpp b/src/widgets/widgets/qabstractspinbox.cpp
index 1850487a8a..09d4c0de35 100644
--- a/src/widgets/widgets/qabstractspinbox.cpp
+++ b/src/widgets/widgets/qabstractspinbox.cpp
@@ -72,6 +72,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     \class QAbstractSpinBox
     \brief The QAbstractSpinBox class provides a spinbox and a line edit to
@@ -1096,7 +1098,7 @@ void QAbstractSpinBox::keyPressEvent(QKeyEvent *event)
 
     case Qt::Key_U:
         if (event->modifiers() & Qt::ControlModifier
-            && QGuiApplication::platformName() == QLatin1String("xcb")) { // only X11
+            && QGuiApplication::platformName() == "xcb"_L1) { // only X11
             event->accept();
             if (!isReadOnly())
                 clear();
@@ -1625,7 +1627,7 @@ void QAbstractSpinBoxPrivate::init()
     Q_Q(QAbstractSpinBox);
 
     q->setLineEdit(new QLineEdit(q));
-    edit->setObjectName(QLatin1String("qt_spinbox_lineedit"));
+    edit->setObjectName("qt_spinbox_lineedit"_L1);
     validator = new QSpinBoxValidator(q, this);
     edit->setValidator(validator);
 
@@ -1969,7 +1971,7 @@ QVariant QAbstractSpinBoxPrivate::calculateAdaptiveDecimalStep(int steps) const
 QSpinBoxValidator::QSpinBoxValidator(QAbstractSpinBox *qp, QAbstractSpinBoxPrivate *dp)
     : QValidator(qp), qptr(qp), dptr(dp)
 {
-    setObjectName(QLatin1String("qt_spinboxvalidator"));
+    setObjectName("qt_spinboxvalidator"_L1);
 }
 
 /*!
diff --git a/src/widgets/widgets/qabstractspinbox_p.h b/src/widgets/widgets/qabstractspinbox_p.h
index bfde96372c..8aca45b98b 100644
--- a/src/widgets/widgets/qabstractspinbox_p.h
+++ b/src/widgets/widgets/qabstractspinbox_p.h
@@ -128,7 +128,7 @@ public:
     QVariant value, minimum, maximum, singleStep;
     QRect hoverRect;
 
-    mutable QString cachedText = QLatin1String("\x01");
+    mutable QString cachedText = { u'\x01' };
     mutable QVariant cachedValue;
     mutable QSize cachedSizeHint, cachedMinimumSizeHint;
     QLineEdit *edit = nullptr;
diff --git a/src/widgets/widgets/qcalendarwidget.cpp b/src/widgets/widgets/qcalendarwidget.cpp
index 42fe33904b..86ce44520f 100644
--- a/src/widgets/widgets/qcalendarwidget.cpp
+++ b/src/widgets/widgets/qcalendarwidget.cpp
@@ -63,6 +63,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 enum {
     RowCount = 6,
     ColumnCount = 7,
@@ -105,9 +107,9 @@ protected:
 QString QCalendarDateSectionValidator::highlightString(const QString &str, int pos)
 {
     if (pos == 0)
-        return QLatin1String("<b>") + str + QLatin1String("</b>");
+        return "<b>"_L1 + str + "</b>"_L1;
     int startPos = str.length() - pos;
-    return QStringView{str}.mid(0, startPos) + QLatin1String("<b>") + QStringView{str}.mid(startPos, pos) + QLatin1String("</b>");
+    return QStringView{str}.mid(0, startPos) + "<b>"_L1 + QStringView{str}.mid(startPos, pos) + "</b>"_L1;
 
 }
 
@@ -1758,7 +1760,7 @@ void QCalendarWidgetPrivate::createNavigationBar(QWidget *widget)
 {
     Q_Q(QCalendarWidget);
     navBarBackground = new QWidget(widget);
-    navBarBackground->setObjectName(QLatin1String("qt_calendar_navigationbar"));
+    navBarBackground->setObjectName("qt_calendar_navigationbar"_L1);
     navBarBackground->setAutoFillBackground(true);
     navBarBackground->setBackgroundRole(QPalette::Highlight);
 
@@ -1819,11 +1821,11 @@ void QCalendarWidgetPrivate::createNavigationBar(QWidget *widget)
     monthButton->setFocusPolicy(Qt::NoFocus);
 
     //set names for the header controls.
-    prevMonth->setObjectName(QLatin1String("qt_calendar_prevmonth"));
-    nextMonth->setObjectName(QLatin1String("qt_calendar_nextmonth"));
-    monthButton->setObjectName(QLatin1String("qt_calendar_monthbutton"));
-    yearButton->setObjectName(QLatin1String("qt_calendar_yearbutton"));
-    yearEdit->setObjectName(QLatin1String("qt_calendar_yearedit"));
+    prevMonth->setObjectName("qt_calendar_prevmonth"_L1);
+    nextMonth->setObjectName("qt_calendar_nextmonth"_L1);
+    monthButton->setObjectName("qt_calendar_monthbutton"_L1);
+    yearButton->setObjectName("qt_calendar_yearbutton"_L1);
+    yearEdit->setObjectName("qt_calendar_yearedit"_L1);
 
     updateMonthMenu();
     showMonth(m_model->m_date.year(m_model->m_calendar), m_model->m_date.month(m_model->m_calendar));
@@ -2135,7 +2137,7 @@ QCalendarWidget::QCalendarWidget(QWidget *parent)
     d->m_model->m_dayFormats.insert(Qt::Saturday, fmt);
     d->m_model->m_dayFormats.insert(Qt::Sunday, fmt);
     d->m_view = new QCalendarView(this);
-    d->m_view->setObjectName(QLatin1String("qt_calendar_calendarview"));
+    d->m_view->setObjectName("qt_calendar_calendarview"_L1);
     d->m_view->setModel(d->m_model);
     d->m_model->setView(d->m_view);
     d->m_view->setSelectionBehavior(QAbstractItemView::SelectItems);
@@ -2278,7 +2280,7 @@ QSize QCalendarWidget::minimumSizeHint() const
         headerW += monthW + buttonDecoMargin;
 
         fm = d->yearButton->fontMetrics();
-        headerW += fm.boundingRect(QLatin1String("5555")).width() + buttonDecoMargin;
+        headerW += fm.boundingRect("5555"_L1).width() + buttonDecoMargin;
 
         headerSize = QSize(headerW, headerH);
     }
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 9a097c4672..d381deae33 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -87,6 +87,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QComboBoxPrivate::QComboBoxPrivate()
     : QWidgetPrivate(),
       shownOnce(false),
@@ -158,8 +160,7 @@ QStyleOptionMenuItem QComboMenuDelegate::getStyleOption(const QStyleOptionViewIt
         menuOption.palette.setBrush(QPalette::All, QPalette::Window,
                                     qvariant_cast<QBrush>(index.data(Qt::BackgroundRole)));
     }
-    menuOption.text = index.model()->data(index, Qt::DisplayRole).toString()
-                           .replace(u'&', QLatin1String("&&"));
+    menuOption.text = index.model()->data(index, Qt::DisplayRole).toString().replace(u'&', "&&"_L1);
     menuOption.reservedShortcutWidth = 0;
     menuOption.maxIconWidth =  option.decorationSize.width() + 4;
     menuOption.menuRect = option.rect;
diff --git a/src/widgets/widgets/qdatetimeedit.cpp b/src/widgets/widgets/qdatetimeedit.cpp
index cc58eb165d..8c6080e3ae 100644
--- a/src/widgets/widgets/qdatetimeedit.cpp
+++ b/src/widgets/widgets/qdatetimeedit.cpp
@@ -69,6 +69,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 // --- QDateTimeEdit ---
 
 /*!
@@ -2518,21 +2520,21 @@ void QDateTimeEditPrivate::init(const QVariant &var)
         updateTimeSpec();
         q->setDisplayFormat(defaultDateFormat);
         if (sectionNodes.isEmpty()) // ### safeguard for broken locale
-            q->setDisplayFormat(QLatin1String("dd/MM/yyyy"));
+            q->setDisplayFormat("dd/MM/yyyy"_L1);
         break;
     case QMetaType::QDateTime:
         value = var;
         updateTimeSpec();
         q->setDisplayFormat(defaultDateTimeFormat);
         if (sectionNodes.isEmpty()) // ### safeguard for broken locale
-            q->setDisplayFormat(QLatin1String("dd/MM/yyyy hh:mm:ss"));
+            q->setDisplayFormat("dd/MM/yyyy hh:mm:ss"_L1);
         break;
     case QMetaType::QTime:
         value = QDateTime(QDATETIMEEDIT_DATE_INITIAL, var.toTime());
         updateTimeSpec();
         q->setDisplayFormat(defaultTimeFormat);
         if (sectionNodes.isEmpty()) // ### safeguard for broken locale
-            q->setDisplayFormat(QLatin1String("hh:mm:ss"));
+            q->setDisplayFormat("hh:mm:ss"_L1);
         break;
     default:
         Q_ASSERT_X(0, "QDateTimeEditPrivate::init", "Internal error");
@@ -2636,7 +2638,7 @@ void QDateTimeEditPrivate::initCalendarPopup(QCalendarWidget *cw)
     Q_Q(QDateTimeEdit);
     if (!monthCalendar) {
         monthCalendar = new QCalendarPopup(q, cw, calendar);
-        monthCalendar->setObjectName(QLatin1String("qt_datetimedit_calendar"));
+        monthCalendar->setObjectName("qt_datetimedit_calendar"_L1);
         QObject::connect(monthCalendar, SIGNAL(newDateSelected(QDate)), q, SLOT(setDate(QDate)));
         QObject::connect(monthCalendar, SIGNAL(hidingCalendar(QDate)), q, SLOT(setDate(QDate)));
         QObject::connect(monthCalendar, SIGNAL(activated(QDate)), q, SLOT(setDate(QDate)));
diff --git a/src/widgets/widgets/qdockwidget.cpp b/src/widgets/widgets/qdockwidget.cpp
index 66f92af051..c1aaa94771 100644
--- a/src/widgets/widgets/qdockwidget.cpp
+++ b/src/widgets/widgets/qdockwidget.cpp
@@ -61,6 +61,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 extern QString qt_setWindowTitle_helperHelper(const QString&, const QWidget*); // qwidget.cpp
 
 // qmainwindow.cpp
@@ -285,7 +287,7 @@ bool QDockWidgetLayout::wmSupportsNativeWindowDeco()
 #if defined(Q_OS_ANDROID)
     return false;
 #else
-    static const bool xcb = !QGuiApplication::platformName().compare(QLatin1String("xcb"), Qt::CaseInsensitive);
+    static const bool xcb = !QGuiApplication::platformName().compare("xcb"_L1, Qt::CaseInsensitive);
     return !xcb;
 #endif
 }
@@ -659,12 +661,12 @@ void QDockWidgetPrivate::init()
     layout->setSizeConstraint(QLayout::SetMinAndMaxSize);
 
     QAbstractButton *button = new QDockWidgetTitleButton(q);
-    button->setObjectName(QLatin1String("qt_dockwidget_floatbutton"));
+    button->setObjectName("qt_dockwidget_floatbutton"_L1);
     QObject::connect(button, SIGNAL(clicked()), q, SLOT(_q_toggleTopLevel()));
     layout->setWidgetForRole(QDockWidgetLayout::FloatButton, button);
 
     button = new QDockWidgetTitleButton(q);
-    button->setObjectName(QLatin1String("qt_dockwidget_closebutton"));
+    button->setObjectName("qt_dockwidget_closebutton"_L1);
     QObject::connect(button, SIGNAL(clicked()), q, SLOT(close()));
     layout->setWidgetForRole(QDockWidgetLayout::CloseButton, button);
 
diff --git a/src/widgets/widgets/qfontcombobox.cpp b/src/widgets/widgets/qfontcombobox.cpp
index 1becfafa6b..93fa77006b 100644
--- a/src/widgets/widgets/qfontcombobox.cpp
+++ b/src/widgets/widgets/qfontcombobox.cpp
@@ -50,6 +50,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 static QFontDatabase::WritingSystem writingSystemFromScript(QLocale::Script script)
 {
     switch (script) {
@@ -287,7 +289,7 @@ void QFontFamilyDelegate::paint(QPainter *painter,
 
     const QString sampleText = comboPrivate->sampleTextForFontFamily.value(text, comboPrivate->sampleTextForWritingSystem.value(system));
     if (system != QFontDatabase::Any || !sampleText.isEmpty()) {
-        int w = painter->fontMetrics().horizontalAdvance(text + QLatin1String("  "));
+        int w = painter->fontMetrics().horizontalAdvance(text + "  "_L1);
         painter->setFont(font2);
         const QString sample = !sampleText.isEmpty() ? sampleText : QFontDatabase::writingSystemSample(system);
         if (option.direction == Qt::RightToLeft)
@@ -350,7 +352,7 @@ void QFontComboBoxPrivate::_q_updateModel()
                 continue;
         }
         result += list.at(i);
-        if (list.at(i) == fi.family() || list.at(i).startsWith(fi.family() + QLatin1String(" [")))
+        if (list.at(i) == fi.family() || list.at(i).startsWith(fi.family() + " ["_L1))
             offset = result.count() - 1;
     }
     list = result;
diff --git a/src/widgets/widgets/qlabel.cpp b/src/widgets/widgets/qlabel.cpp
index 55cf8c0b41..9586151f0d 100644
--- a/src/widgets/widgets/qlabel.cpp
+++ b/src/widgets/widgets/qlabel.cpp
@@ -60,6 +60,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QLabelPrivate::QLabelPrivate()
     : QFramePrivate(),
       sh(),
@@ -1555,11 +1557,11 @@ void QLabelPrivate::ensureTextPopulated() const
                 int from = 0;
                 bool found = false;
                 QTextCursor cursor;
-                while (!(cursor = control->document()->find((QLatin1String("&")), from)).isNull()) {
+                while (!(cursor = control->document()->find(("&"_L1), from)).isNull()) {
                     cursor.deleteChar(); // remove the ampersand
                     cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor);
                     from = cursor.position();
-                    if (!found && cursor.selectedText() != QLatin1String("&")) { //not a second &
+                    if (!found && cursor.selectedText() != "&"_L1) { //not a second &
                         found = true;
                         shortcutCursor = cursor;
                     }
diff --git a/src/widgets/widgets/qlineedit.cpp b/src/widgets/widgets/qlineedit.cpp
index 7e1dea14f5..05a23ec101 100644
--- a/src/widgets/widgets/qlineedit.cpp
+++ b/src/widgets/widgets/qlineedit.cpp
@@ -97,6 +97,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     Initialize \a option with the values from this QLineEdit. This method
     is useful for subclasses when they need a QStyleOptionFrame, but don't want
@@ -2111,7 +2113,7 @@ void QLineEdit::paintEvent(QPaintEvent *)
 void QLineEdit::dragMoveEvent(QDragMoveEvent *e)
 {
     Q_D(QLineEdit);
-    if (!d->control->isReadOnly() && e->mimeData()->hasFormat(QLatin1String("text/plain"))) {
+    if (!d->control->isReadOnly() && e->mimeData()->hasFormat("text/plain"_L1)) {
         e->acceptProposedAction();
         d->control->moveCursor(d->xToPos(e->position().toPoint().x()), false);
         d->cursorVisible = true;
@@ -2215,7 +2217,7 @@ QMenu *QLineEdit::createStandardContextMenu()
 {
     Q_D(QLineEdit);
     QMenu *popup = new QMenu(this);
-    popup->setObjectName(QLatin1String("qt_edit_menu"));
+    popup->setObjectName("qt_edit_menu"_L1);
     QAction *action = nullptr;
 
     if (!isReadOnly()) {
diff --git a/src/widgets/widgets/qmainwindowlayout.cpp b/src/widgets/widgets/qmainwindowlayout.cpp
index 06a252bb95..d0e513bb8a 100644
--- a/src/widgets/widgets/qmainwindowlayout.cpp
+++ b/src/widgets/widgets/qmainwindowlayout.cpp
@@ -84,6 +84,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 extern QMainWindowLayout *qt_mainwindow_layout(const QMainWindow *window);
 
 /******************************************************************************
@@ -100,14 +102,14 @@ static void dumpLayout(QTextStream &qout, const QDockAreaLayoutItem &item, QStri
             << "pos: " << item.pos << " size:" << item.size
             << " gap:" << (item.flags & QDockAreaLayoutItem::GapItem)
             << " keepSize:" << (item.flags & QDockAreaLayoutItem::KeepSize) << '\n';
-    indent += QLatin1String("  ");
+    indent += "  "_L1;
     if (item.widgetItem != nullptr) {
         qout << indent << "widget: "
             << item.widgetItem->widget()->metaObject()->className()
             << " \"" << item.widgetItem->widget()->windowTitle() << "\"\n";
     } else if (item.subinfo != nullptr) {
         qout << indent << "subinfo:\n";
-        dumpLayout(qout, *item.subinfo, indent + QLatin1String("  "));
+        dumpLayout(qout, *item.subinfo, indent + "  "_L1);
     } else if (item.placeHolderItem != nullptr) {
         QRect r = item.placeHolderItem->topLevelRect;
         qout << indent << "placeHolder: "
@@ -138,11 +140,11 @@ static void dumpLayout(QTextStream &qout, const QDockAreaLayoutInfo &layout, QSt
 #endif
             << '\n';
 
-    indent += QLatin1String("  ");
+    indent += "  "_L1;
 
     for (int i = 0; i < layout.item_list.count(); ++i) {
         qout << indent << "Item: " << i << '\n';
-        dumpLayout(qout, layout.item_list.at(i), indent + QLatin1String("  "));
+        dumpLayout(qout, layout.item_list.at(i), indent + "  "_L1);
     }
 }
 
@@ -155,13 +157,13 @@ static void dumpLayout(QTextStream &qout, const QDockAreaLayout &layout)
             << layout.rect.height() << '\n';
 
     qout << "TopDockArea:\n";
-    dumpLayout(qout, layout.docks[QInternal::TopDock], QLatin1String("  "));
+    dumpLayout(qout, layout.docks[QInternal::TopDock], "  "_L1);
     qout << "LeftDockArea:\n";
-    dumpLayout(qout, layout.docks[QInternal::LeftDock], QLatin1String("  "));
+    dumpLayout(qout, layout.docks[QInternal::LeftDock], "  "_L1);
     qout << "RightDockArea:\n";
-    dumpLayout(qout, layout.docks[QInternal::RightDock], QLatin1String("  "));
+    dumpLayout(qout, layout.docks[QInternal::RightDock], "  "_L1);
     qout << "BottomDockArea:\n";
-    dumpLayout(qout, layout.docks[QInternal::BottomDock], QLatin1String("  "));
+    dumpLayout(qout, layout.docks[QInternal::BottomDock], "  "_L1);
 }
 
 QDebug operator<<(QDebug debug, const QDockAreaLayout &layout)
@@ -1893,7 +1895,7 @@ QWidget *QMainWindowLayout::getSeparatorWidget()
         result = new QWidget(parentWidget());
         result->setAttribute(Qt::WA_MouseNoMask, true);
         result->setAutoFillBackground(false);
-        result->setObjectName(QLatin1String("qt_qmainwindow_extended_splitter"));
+        result->setObjectName("qt_qmainwindow_extended_splitter"_L1);
     }
     usedSeparatorWidgets.insert(result);
     return result;
@@ -2444,7 +2446,7 @@ QMainWindowLayout::QMainWindowLayout(QMainWindow *mainwindow, QLayout *parentLay
 #endif // QT_CONFIG(dockwidget)
     pluggingWidget = nullptr;
 
-    setObjectName(mainwindow->objectName() + QLatin1String("_layout"));
+    setObjectName(mainwindow->objectName() + "_layout"_L1);
 }
 
 QMainWindowLayout::~QMainWindowLayout()
@@ -2727,7 +2729,7 @@ void QMainWindowLayout::updateGapIndicator()
         if (!gapIndicator) {
             gapIndicator = new QRubberBand(QRubberBand::Rectangle, expectedParent);
             // For accessibility to identify this special widget.
-            gapIndicator->setObjectName(QLatin1String("qt_rubberband"));
+            gapIndicator->setObjectName("qt_rubberband"_L1);
         } else if (gapIndicator->parent() != expectedParent) {
             gapIndicator->setParent(expectedParent);
         }
diff --git a/src/widgets/widgets/qmdiarea.cpp b/src/widgets/widgets/qmdiarea.cpp
index 1167524a0a..51a9b54979 100644
--- a/src/widgets/widgets/qmdiarea.cpp
+++ b/src/widgets/widgets/qmdiarea.cpp
@@ -176,6 +176,7 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
 using namespace QMdi;
 
 // Asserts in debug mode, gives warning otherwise.
@@ -277,7 +278,7 @@ static inline QString tabTextFor(QMdiSubWindow *subWindow)
 
     QString title = subWindow->windowTitle();
     if (subWindow->isWindowModified()) {
-        title.replace(QLatin1String("[*]"), QLatin1String("*"));
+        title.replace("[*]"_L1, "*"_L1);
     } else {
         extern QString qt_setWindowTitle_helperHelper(const QString&, const QWidget*);
         title = qt_setWindowTitle_helperHelper(title, subWindow);
@@ -1515,7 +1516,7 @@ void QMdiAreaPrivate::highlightNextSubWindow(int increaseFactor)
     if (!rubberBand) {
         rubberBand = new QRubberBand(QRubberBand::Rectangle, q);
         // For accessibility to identify this special widget.
-        rubberBand->setObjectName(QLatin1String("qt_rubberband"));
+        rubberBand->setObjectName("qt_rubberband"_L1);
         rubberBand->setWindowFlags(rubberBand->windowFlags() | Qt::WindowStaysOnTopHint);
     }
 #endif
diff --git a/src/widgets/widgets/qmdisubwindow.cpp b/src/widgets/widgets/qmdisubwindow.cpp
index 120bf590b9..8d0189a2ed 100644
--- a/src/widgets/widgets/qmdisubwindow.cpp
+++ b/src/widgets/widgets/qmdisubwindow.cpp
@@ -174,6 +174,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 using namespace QMdi;
 
 static const QStyle::SubControl SubControls[] =
@@ -286,7 +288,7 @@ QString QMdiSubWindowPrivate::originalWindowTitle()
     if (originalTitle.isNull()) {
         originalTitle = originalWindowTitleHelper();
         if (originalTitle.isNull())
-            originalTitle = QLatin1String("");
+            originalTitle = ""_L1;
     }
     return originalTitle;
 }
@@ -1919,7 +1921,7 @@ void QMdiSubWindowPrivate::enterRubberBandMode()
     if (!rubberBand) {
         rubberBand = new QRubberBand(QRubberBand::Rectangle, q->parentWidget());
         // For accessibility to identify this special widget.
-        rubberBand->setObjectName(QLatin1String("qt_rubberband"));
+        rubberBand->setObjectName("qt_rubberband"_L1);
     }
     QPoint rubberBandPos = q->mapToParent(QPoint(0, 0));
     rubberBand->setGeometry(rubberBandPos.x(), rubberBandPos.y(),
@@ -2216,7 +2218,7 @@ void QMdiSubWindowPrivate::updateInternalWindowTitle()
     Q_Q(QMdiSubWindow);
     if (q->isWindowModified()) {
         windowTitle = q->windowTitle();
-        windowTitle.replace(QLatin1String("[*]"), QLatin1String("*"));
+        windowTitle.replace("[*]"_L1, "*"_L1);
     } else {
         windowTitle = qt_setWindowTitle_helperHelper(q->windowTitle(), q);
     }
@@ -2334,10 +2336,8 @@ void QMdiSubWindow::setWidget(QWidget *widget)
         d->updateWindowTitle(true);
         isWindowModified = d->baseWidget->isWindowModified();
     }
-    if (!this->isWindowModified() && isWindowModified
-            && windowTitle().contains(QLatin1String("[*]"))) {
+    if (!this->isWindowModified() && isWindowModified && windowTitle().contains("[*]"_L1))
         setWindowModified(isWindowModified);
-    }
     d->lastChildWindowTitle = d->baseWidget->windowTitle();
     d->ignoreWindowTitleChange = false;
 
@@ -2770,7 +2770,7 @@ bool QMdiSubWindow::eventFilter(QObject *object, QEvent *event)
         bool windowModified = d->baseWidget->isWindowModified();
         if (!windowModified && d->baseWidget->windowTitle() != windowTitle())
             break;
-        if (windowTitle().contains(QLatin1String("[*]")))
+        if (windowTitle().contains("[*]"_L1))
             setWindowModified(windowModified);
         break;
     }
@@ -2871,7 +2871,7 @@ bool QMdiSubWindow::event(QEvent *event)
         d->updateInternalWindowTitle();
         break;
     case QEvent::ModifiedChange:
-        if (!windowTitle().contains(QLatin1String("[*]")))
+        if (!windowTitle().contains("[*]"_L1))
             break;
 #if QT_CONFIG(menubar)
         if (maximizedButtonsWidget() && d->controlContainer->menuBar() && d->controlContainer->menuBar()
diff --git a/src/widgets/widgets/qmenubar.cpp b/src/widgets/widgets/qmenubar.cpp
index c9df8c50eb..4c66267b7d 100644
--- a/src/widgets/widgets/qmenubar.cpp
+++ b/src/widgets/widgets/qmenubar.cpp
@@ -71,6 +71,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QMenuBarExtension : public QToolButton
 {
 public:
@@ -83,7 +85,7 @@ public:
 QMenuBarExtension::QMenuBarExtension(QWidget *parent)
     : QToolButton(parent)
 {
-    setObjectName(QLatin1String("qt_menubar_ext_button"));
+    setObjectName("qt_menubar_ext_button"_L1);
     setAutoRaise(true);
 #if QT_CONFIG(menu)
     setPopupMode(QToolButton::InstantPopup);
diff --git a/src/widgets/widgets/qprogressbar.cpp b/src/widgets/widgets/qprogressbar.cpp
index 89c0990002..4440909c26 100644
--- a/src/widgets/widgets/qprogressbar.cpp
+++ b/src/widgets/widgets/qprogressbar.cpp
@@ -52,6 +52,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QProgressBarPrivate : public QWidgetPrivate
 {
     Q_DECLARE_PUBLIC(QProgressBar)
@@ -89,7 +91,7 @@ QProgressBarPrivate::QProgressBarPrivate()
 void QProgressBarPrivate::initDefaultFormat()
 {
     if (defaultFormat)
-        format = QLatin1String("%p") + locale.percent();
+        format = "%p"_L1 + locale.percent();
 }
 
 void QProgressBarPrivate::init()
@@ -152,10 +154,9 @@ bool QProgressBarPrivate::repaintRequired() const
 
     const auto totalSteps = qint64(maximum) - minimum;
     if (textVisible) {
-        if ((format.contains(QLatin1String("%v"))))
+        if (format.contains("%v"_L1))
             return true;
-        if ((format.contains(QLatin1String("%p"))
-             && valueDifference >= qAbs(totalSteps / 100)))
+        if (format.contains("%p"_L1) && valueDifference >= qAbs(totalSteps / 100))
             return true;
     }
 
@@ -468,19 +469,19 @@ QString QProgressBar::text() const
     QString result = d->format;
     QLocale locale = d->locale; // Omit group separators for compatibility with previous versions that were non-localized.
     locale.setNumberOptions(locale.numberOptions() | QLocale::OmitGroupSeparator);
-    result.replace(QLatin1String("%m"), locale.toString(totalSteps));
-    result.replace(QLatin1String("%v"), locale.toString(d->value));
+    result.replace("%m"_L1, locale.toString(totalSteps));
+    result.replace("%v"_L1, locale.toString(d->value));
 
     // If max and min are equal and we get this far, it means that the
     // progress bar has one step and that we are on that step. Return
     // 100% here in order to avoid division by zero further down.
     if (totalSteps == 0) {
-        result.replace(QLatin1String("%p"), locale.toString(100));
+        result.replace("%p"_L1, locale.toString(100));
         return result;
     }
 
     const auto progress = static_cast<int>((qint64(d->value) - d->minimum) * 100.0 / totalSteps);
-    result.replace(QLatin1String("%p"), locale.toString(progress));
+    result.replace("%p"_L1, locale.toString(progress));
     return result;
 }
 
diff --git a/src/widgets/widgets/qspinbox.cpp b/src/widgets/widgets/qspinbox.cpp
index a5ce8f658a..b6308eda76 100644
--- a/src/widgets/widgets/qspinbox.cpp
+++ b/src/widgets/widgets/qspinbox.cpp
@@ -51,6 +51,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 //#define QSPINBOX_QSBDEBUG
 #ifdef QSPINBOX_QSBDEBUG
 #  define QSBDEBUG qDebug
@@ -518,7 +520,7 @@ QString QSpinBox::textFromValue(int value) const
     QString str;
 
     if (d->displayIntegerBase != 10) {
-        const QLatin1String prefix = value < 0 ? QLatin1String("-") : QLatin1String();
+        const auto prefix = value < 0 ? "-"_L1 : ""_L1;
         str = prefix + QString::number(qAbs(value), d->displayIntegerBase);
     } else {
         str = locale().toString(value);
@@ -1126,8 +1128,8 @@ QVariant QSpinBoxPrivate::validateAndInterpret(QString &input, int &pos,
     int num = min;
 
     if (max != min && (copy.isEmpty()
-                       || (min < 0 && copy == QLatin1String("-"))
-                       || (max >= 0 && copy == QLatin1String("+")))) {
+                       || (min < 0 && copy == "-"_L1)
+                       || (max >= 0 && copy == "+"_L1))) {
         state = QValidator::Intermediate;
         QSBDEBUG() << __FILE__ << __LINE__<< "num is set to" << num;
     } else if (copy.startsWith(u'-') && min >= 0) {
diff --git a/src/widgets/widgets/qsplitter.cpp b/src/widgets/widgets/qsplitter.cpp
index 5ff1cc5c9f..174c5b4df9 100644
--- a/src/widgets/widgets/qsplitter.cpp
+++ b/src/widgets/widgets/qsplitter.cpp
@@ -62,6 +62,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 //#define QSPLITTER_DEBUG
 
 QSplitterPrivate::~QSplitterPrivate()
@@ -873,7 +875,7 @@ QSplitterLayoutStruct *QSplitterPrivate::insertWidget(int index, QWidget *w)
     } else {
         sls = new QSplitterLayoutStruct;
         QSplitterHandle *newHandle = q->createHandle();
-        newHandle->setObjectName(QLatin1String("qt_splithandle_") + w->objectName());
+        newHandle->setObjectName("qt_splithandle_"_L1 + w->objectName());
         sls->handle = newHandle;
         sls->widget = w;
         w->lower();
@@ -1340,7 +1342,7 @@ void QSplitter::setRubberBand(int pos)
         QBoolBlocker b(d->blockChildAdd);
         d->rubberBand = new QRubberBand(QRubberBand::Line, this);
         // For accessibility to identify this special widget.
-        d->rubberBand->setObjectName(QLatin1String("qt_rubberband"));
+        d->rubberBand->setObjectName("qt_rubberband"_L1);
     }
 
     const QRect newGeom = d->orient == Qt::Horizontal ? QRect(QPoint(pos + hw / 2 - rBord, r.y()), QSize(2 * rBord, r.height()))
diff --git a/src/widgets/widgets/qtabbar.cpp b/src/widgets/widgets/qtabbar.cpp
index ac5d3c142a..74e036f65d 100644
--- a/src/widgets/widgets/qtabbar.cpp
+++ b/src/widgets/widgets/qtabbar.cpp
@@ -1550,7 +1550,7 @@ static QString computeElidedText(Qt::TextElideMode mode, const QString &text)
     if (text.length() <= 3)
         return text;
 
-    static const QLatin1String Ellipses("...");
+    static const auto Ellipses = "..."_L1;
     QString ret;
     switch (mode) {
     case Qt::ElideRight:
diff --git a/src/widgets/widgets/qtabwidget.cpp b/src/widgets/widgets/qtabwidget.cpp
index 14059ae70f..1a63319c2b 100644
--- a/src/widgets/widgets/qtabwidget.cpp
+++ b/src/widgets/widgets/qtabwidget.cpp
@@ -55,6 +55,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 /*!
     \class QTabWidget
     \brief The QTabWidget class provides a stack of tabbed widgets.
@@ -226,14 +228,14 @@ void QTabWidgetPrivate::init()
     Q_Q(QTabWidget);
 
     stack = new QStackedWidget(q);
-    stack->setObjectName(QLatin1String("qt_tabwidget_stackedwidget"));
+    stack->setObjectName("qt_tabwidget_stackedwidget"_L1);
     stack->setLineWidth(0);
     // hack so that QMacStyle::layoutSpacing() can detect tab widget pages
     stack->setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred, QSizePolicy::TabWidget));
 
     QObject::connect(stack, SIGNAL(widgetRemoved(int)), q, SLOT(_q_removeTab(int)));
     QTabBar *tabBar = new QTabBar(q);
-    tabBar->setObjectName(QLatin1String("qt_tabwidget_tabbar"));
+    tabBar->setObjectName("qt_tabwidget_tabbar"_L1);
     tabBar->setDrawBase(false);
     q->setTabBar(tabBar);
 
diff --git a/src/widgets/widgets/qtextbrowser.cpp b/src/widgets/widgets/qtextbrowser.cpp
index b070598f81..c48f4cfa39 100644
--- a/src/widgets/widgets/qtextbrowser.cpp
+++ b/src/widgets/widgets/qtextbrowser.cpp
@@ -58,6 +58,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 static inline bool shouldEnableInputMethod(QTextBrowser *texbrowser)
 {
 #if defined (Q_OS_ANDROID)
@@ -169,14 +171,14 @@ Q_DECLARE_TYPEINFO(QTextBrowserPrivate::HistoryEntry, Q_RELOCATABLE_TYPE);
 QString QTextBrowserPrivate::findFile(const QUrl &name) const
 {
     QString fileName;
-    if (name.scheme() == QLatin1String("qrc")) {
-        fileName = QLatin1String(":/") + name.path();
+    if (name.scheme() == "qrc"_L1) {
+        fileName = ":/"_L1 + name.path();
     } else if (name.scheme().isEmpty()) {
         fileName = name.path();
     } else {
 #if defined(Q_OS_ANDROID)
-        if (name.scheme() == QLatin1String("assets"))
-            fileName = QLatin1String("assets:") + name.path();
+        if (name.scheme() == "assets"_L1)
+            fileName = "assets:"_L1 + name.path();
         else
 #endif
             fileName = name.toLocalFile();
@@ -207,7 +209,7 @@ QUrl QTextBrowserPrivate::resolveUrl(const QUrl &url) const
     // For the second case QUrl can merge "#someanchor" with "foo.html"
     // correctly to "foo.html#someanchor"
     if (!(currentURL.isRelative()
-          || (currentURL.scheme() == QLatin1String("file")
+          || (currentURL.scheme() == "file"_L1
               && !QFileInfo(currentURL.toLocalFile()).isAbsolute()))
           || (url.hasFragment() && url.path().isEmpty())) {
         return currentURL.resolved(url);
@@ -245,11 +247,11 @@ void QTextBrowserPrivate::_q_activateAnchor(const QString &href)
 
 #ifndef QT_NO_DESKTOPSERVICES
     bool isFileScheme =
-            url.scheme() == QLatin1String("file")
+            url.scheme() == "file"_L1
 #if defined(Q_OS_ANDROID)
-            || url.scheme() == QLatin1String("assets")
+            || url.scheme() == "assets"_L1
 #endif
-            || url.scheme() == QLatin1String("qrc");
+            || url.scheme() == "qrc"_L1;
     if ((openExternalLinks && !isFileScheme && !url.isRelative())
         || (url.isRelative() && !currentURL.isRelative() && !isFileScheme)) {
         QDesktopServices::openUrl(url);
@@ -304,9 +306,9 @@ void QTextBrowserPrivate::setSource(const QUrl &url, QTextDocument::ResourceType
     QString fileName = url.fileName();
     if (type == QTextDocument::UnknownResource) {
 #if QT_CONFIG(textmarkdownreader)
-        if (fileName.endsWith(QLatin1String(".md")) ||
-                fileName.endsWith(QLatin1String(".mkd")) ||
-                fileName.endsWith(QLatin1String(".markdown")))
+        if (fileName.endsWith(".md"_L1) ||
+                fileName.endsWith(".mkd"_L1) ||
+                fileName.endsWith(".markdown"_L1))
             type = QTextDocument::MarkdownResource;
         else
 #endif
@@ -337,7 +339,7 @@ void QTextBrowserPrivate::setSource(const QUrl &url, QTextDocument::ResourceType
 
         if (q->isVisible()) {
             const QStringView firstTag = QStringView{txt}.left(txt.indexOf(u'>') + 1);
-            if (firstTag.startsWith(QLatin1String("<qt")) && firstTag.contains(QLatin1String("type")) && firstTag.contains(QLatin1String("detail"))) {
+            if (firstTag.startsWith("<qt"_L1) && firstTag.contains("type"_L1) && firstTag.contains("detail"_L1)) {
 #ifndef QT_NO_CURSOR
                 QGuiApplication::restoreOverrideCursor();
 #endif
diff --git a/src/widgets/widgets/qtoolbarextension.cpp b/src/widgets/widgets/qtoolbarextension.cpp
index 76bc5a4773..a17d375d15 100644
--- a/src/widgets/widgets/qtoolbarextension.cpp
+++ b/src/widgets/widgets/qtoolbarextension.cpp
@@ -45,11 +45,13 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QToolBarExtension::QToolBarExtension(QWidget *parent)
     : QToolButton(parent)
     , m_orientation(Qt::Horizontal)
 {
-    setObjectName(QLatin1String("qt_toolbar_ext_button"));
+    setObjectName("qt_toolbar_ext_button"_L1);
     setAutoRaise(true);
     setOrientation(m_orientation);
     setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
diff --git a/src/widgets/widgets/qtoolbox.cpp b/src/widgets/widgets/qtoolbox.cpp
index 787554551d..5afda0a871 100644
--- a/src/widgets/widgets/qtoolbox.cpp
+++ b/src/widgets/widgets/qtoolbox.cpp
@@ -56,6 +56,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QToolBoxButton : public QAbstractButton
 {
     Q_OBJECT
@@ -351,7 +353,7 @@ int QToolBox::insertItem(int index, QWidget *widget, const QIcon &icon, const QS
     auto &c = *newPage;
     c.widget = widget;
     c.button = new QToolBoxButton(this);
-    c.button->setObjectName(QLatin1String("qt_toolbox_toolboxbutton"));
+    c.button->setObjectName("qt_toolbox_toolboxbutton"_L1);
     connect(c.button, SIGNAL(clicked()), this, SLOT(_q_buttonClicked()));
 
     c.sv = new QScrollArea(this);
diff --git a/src/widgets/widgets/qtoolbutton.cpp b/src/widgets/widgets/qtoolbutton.cpp
index 9f47b876c0..bb4b4acc7f 100644
--- a/src/widgets/widgets/qtoolbutton.cpp
+++ b/src/widgets/widgets/qtoolbutton.cpp
@@ -67,6 +67,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QToolButtonPrivate : public QAbstractButtonPrivate
 {
     Q_DECLARE_PUBLIC(QToolButton)
@@ -939,7 +941,7 @@ void QToolButton::setDefaultAction(QAction *action)
     // If iconText() is generated from text(), we need to escape any '&'s so they
     // don't turn into shortcuts
     if (QActionPrivate::get(action)->iconText.isEmpty())
-        buttonText.replace(QLatin1String("&"), QLatin1String("&&"));
+        buttonText.replace("&"_L1, "&&"_L1);
     setText(buttonText);
     setIcon(action->icon());
 #if QT_CONFIG(tooltip)
diff --git a/src/widgets/widgets/qwidgetresizehandler.cpp b/src/widgets/widgets/qwidgetresizehandler.cpp
index 0cf9457a57..c2933d292e 100644
--- a/src/widgets/widgets/qwidgetresizehandler.cpp
+++ b/src/widgets/widgets/qwidgetresizehandler.cpp
@@ -52,6 +52,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #define RANGE 4
 
 static bool resizeHorizontalDirectionFixed = false;
@@ -219,7 +221,7 @@ void QWidgetResizeHandler::mouseMoveEvent(QMouseEvent *e)
     QPoint pp = globalPos - moveOffset;
 
     // Workaround for window managers which refuse to move a tool window partially offscreen.
-    if (QGuiApplication::platformName() == QLatin1String("xcb")) {
+    if (QGuiApplication::platformName() == "xcb"_L1) {
         const QRect desktop = QWidgetPrivate::availableScreenGeometry(widget);
         pp.rx() = qMax(pp.x(), desktop.left());
         pp.ry() = qMax(pp.y(), desktop.top());
diff --git a/src/widgets/widgets/qwidgettextcontrol.cpp b/src/widgets/widgets/qwidgettextcontrol.cpp
index bc7da638c9..3d41f2a9fb 100644
--- a/src/widgets/widgets/qwidgettextcontrol.cpp
+++ b/src/widgets/widgets/qwidgettextcontrol.cpp
@@ -110,6 +110,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 // could go into QTextCursor...
 static QTextLine currentTextLine(const QTextCursor &cursor)
 {
@@ -2709,8 +2711,8 @@ bool QWidgetTextControl::canInsertFromMimeData(const QMimeData *source) const
     if (d->acceptRichText)
         return (source->hasText() && !source->text().isEmpty())
             || source->hasHtml()
-            || source->hasFormat(QLatin1String("application/x-qrichtext"))
-            || source->hasFormat(QLatin1String("application/x-qt-richtext"));
+            || source->hasFormat("application/x-qrichtext"_L1)
+            || source->hasFormat("application/x-qt-richtext"_L1);
     else
         return source->hasText() && !source->text().isEmpty();
 }
@@ -2724,10 +2726,10 @@ void QWidgetTextControl::insertFromMimeData(const QMimeData *source)
     bool hasData = false;
     QTextDocumentFragment fragment;
 #ifndef QT_NO_TEXTHTMLPARSER
-    if (source->hasFormat(QLatin1String("application/x-qrichtext")) && d->acceptRichText) {
+    if (source->hasFormat("application/x-qrichtext"_L1) && d->acceptRichText) {
         // x-qrichtext is always UTF-8 (taken from Qt3 since we don't use it anymore).
-        const QString richtext = QLatin1String("<meta name=\"qrichtext\" content=\"1\" />")
-                + QString::fromUtf8(source->data(QLatin1String("application/x-qrichtext")));
+        const QString richtext = "<meta name=\"qrichtext\" content=\"1\" />"_L1
+                + QString::fromUtf8(source->data("application/x-qrichtext"_L1));
         fragment = QTextDocumentFragment::fromHtml(richtext, d->doc);
         hasData = true;
     } else if (source->hasHtml() && d->acceptRichText) {
@@ -3479,7 +3481,7 @@ void QTextEditMimeData::setup() const
 {
     QTextEditMimeData *that = const_cast<QTextEditMimeData *>(this);
 #ifndef QT_NO_TEXTHTMLPARSER
-    that->setData(QLatin1String("text/html"), fragment.toHtml().toUtf8());
+    that->setData("text/html"_L1, fragment.toHtml().toUtf8());
 #endif
 #ifndef QT_NO_TEXTODFWRITER
     {
@@ -3487,7 +3489,7 @@ void QTextEditMimeData::setup() const
         QTextDocumentWriter writer(&buffer, "ODF");
         writer.write(fragment);
         buffer.close();
-        that->setData(QLatin1String("application/vnd.oasis.opendocument.text"), buffer.data());
+        that->setData("application/vnd.oasis.opendocument.text"_L1, buffer.data());
     }
 #endif
     that->setText(fragment.toRawText());