Merge commit 'dev' into 'wip/cmake-merge'

Change-Id: I176c40d031be26a1dd1cf08843e448a660598783

21 files changed, 520 insertions, 190 deletions

diff --git a/src/widgets/dialogs/qcolordialog.cpp b/src/widgets/dialogs/qcolordialog.cpp
index 4aa680af61..c0bacd553d 100644
--- a/src/widgets/dialogs/qcolordialog.cpp
+++ b/src/widgets/dialogs/qcolordialog.cpp
@@ -57,7 +57,9 @@
 #include "qpainter.h"
 #include "qpixmap.h"
 #include "qpushbutton.h"
+#if QT_CONFIG(settings)
 #include "qsettings.h"
+#endif
 #include "qsharedpointer.h"
 #include "qstyle.h"
 #include "qstyleoption.h"
@@ -644,7 +646,7 @@ void QColorWell::mouseMoveEvent(QMouseEvent *e)
         drg->setMimeData(mime);
         drg->setPixmap(pix);
         mousePressed = false;
-        drg->start();
+        drg->exec(Qt::CopyAction);
     }
 #endif
 }
@@ -840,8 +842,8 @@ void QColorLuminancePicker::paintEvent(QPaintEvent *)
     p.drawPixmap(1, coff, *pix);
     const QPalette &g = palette();
     qDrawShadePanel(&p, r, g, true);
-    p.setPen(g.foreground().color());
-    p.setBrush(g.foreground());
+    p.setPen(g.windowText().color());
+    p.setBrush(g.windowText());
     QPolygon a;
     int y = val2y(val);
     a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
@@ -1129,7 +1131,7 @@ void QColorShowLabel::mouseMoveEvent(QMouseEvent *e)
         drg->setMimeData(mime);
         drg->setPixmap(pix);
         mousePressed = false;
-        drg->start();
+        drg->exec(Qt::CopyAction);
     }
 #endif
 }
@@ -1177,7 +1179,8 @@ QColorShower::QColorShower(QColorDialog *parent)
     curQColor = Qt::white;
 
     gl = new QGridLayout(this);
-    gl->setMargin(gl->spacing());
+    const int s = gl->spacing();
+    gl->setContentsMargins(s, s, s, s);
     lab = new QColorShowLabel(this);
 
 #ifdef QT_SMALL_COLORDIALOG
@@ -1805,7 +1808,7 @@ void QColorDialogPrivate::initWidgets()
     rightLay->addStretch();
 
     cs = new QColorShower(q);
-    pickLay->setMargin(cs->gl->margin());
+    pickLay->setContentsMargins(cs->gl->contentsMargins());
     QObject::connect(cs, SIGNAL(newCol(QRgb)), q, SLOT(_q_newColorTypedIn(QRgb)));
     QObject::connect(cs, SIGNAL(currentColorChanged(QColor)),
                      q, SIGNAL(currentColorChanged(QColor)));
@@ -1814,7 +1817,7 @@ void QColorDialogPrivate::initWidgets()
 #else
     rightLay->addWidget(cs);
     if (leftLay)
-        leftLay->addSpacing(cs->gl->margin());
+        leftLay->addSpacing(cs->gl->contentsMargins().right());
 #endif
 
     buttons = new QDialogButtonBox(q);
@@ -1851,7 +1854,7 @@ void QColorDialogPrivate::_q_addCustom()
     QColorDialogOptions::setCustomColor(nextCust, cs->currentColor());
     if (custom)
         custom->update();
-    nextCust = (nextCust+1) % 16;
+    nextCust = (nextCust+1) % QColorDialogOptions::customColorCount();
 }
 
 void QColorDialogPrivate::retranslateStrings()
@@ -1885,7 +1888,7 @@ bool QColorDialogPrivate::canBeNativeDialog() const
 }
 
 static const Qt::WindowFlags DefaultWindowFlags =
-        Qt::Dialog | Qt::WindowTitleHint | Qt::MSWindowsFixedSizeDialogHint
+        Qt::Dialog | Qt::WindowTitleHint
         | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint;
 
 /*!
diff --git a/src/widgets/dialogs/qdialog.cpp b/src/widgets/dialogs/qdialog.cpp
index cadd7ef031..5692a16bce 100644
--- a/src/widgets/dialogs/qdialog.cpp
+++ b/src/widgets/dialogs/qdialog.cpp
@@ -145,10 +145,48 @@ bool QDialogPrivate::canBeNativeDialog() const
     return false;
 }
 
-QWindow *QDialogPrivate::parentWindow() const
+/*!
+    \internal
+
+    Properly hides dialog and sets the \a resultCode.
+ */
+void QDialogPrivate::hide(int resultCode)
 {
-    if (const QWidget *parent = q_func()->nativeParentWidget())
+    Q_Q(QDialog);
+
+    q->setResult(resultCode);
+    q->hide();
+
+    close_helper(QWidgetPrivate::CloseNoEvent);
+    resetModalitySetByOpen();
+}
+
+/*!
+    \internal
+
+    Emits finished() signal with \a resultCode. If the \a dialogCode
+    is equal to 0 emits rejected(), if the \a dialogCode is equal to
+    1 emits accepted().
+ */
+void QDialogPrivate::finalize(int resultCode, int dialogCode)
+{
+    Q_Q(QDialog);
+
+    if (dialogCode == QDialog::Accepted)
+        emit q->accepted();
+    else if (dialogCode == QDialog::Rejected)
+        emit q->rejected();
+
+    emit q->finished(resultCode);
+}
+
+QWindow *QDialogPrivate::transientParentWindow() const
+{
+    Q_Q(const QDialog);
+    if (const QWidget *parent = q->nativeParentWidget())
         return parent->windowHandle();
+    else if (q->windowHandle())
+        return q->windowHandle()->transientParent();
     return 0;
 }
 
@@ -158,7 +196,7 @@ bool QDialogPrivate::setNativeDialogVisible(bool visible)
         if (visible) {
             Q_Q(QDialog);
             helperPrepareShow(helper);
-            nativeDialogInUse = helper->show(q->windowFlags(), q->windowModality(), parentWindow());
+            nativeDialogInUse = helper->show(q->windowFlags(), q->windowModality(), transientParentWindow());
         } else if (nativeDialogInUse) {
             helper->hide();
         }
@@ -208,6 +246,13 @@ void QDialogPrivate::deletePlatformHelper()
     window-system properties for the widget (in particular it will
     reset the Qt::Dialog flag).
 
+    \note The parent relationship of the dialog does \e{not} imply
+    that the dialog will always be stacked on top of the parent
+    window. To ensure that the dialog is always on top, make the
+    dialog modal. This also applies for child windows of the dialog
+    itself. To ensure that child windows of the dialog stay on top
+    of the dialog, make the child windows modal as well.
+
     \section1 Modal Dialogs
 
     A \b{modal} dialog is a dialog that blocks input to other
@@ -225,12 +270,11 @@ void QDialogPrivate::deletePlatformHelper()
 
     The most common way to display a modal dialog is to call its
     exec() function. When the user closes the dialog, exec() will
-    provide a useful \l{#return}{return value}. Typically,
-    to get the dialog to close and return the appropriate value, we
-    connect a default button, e.g. \uicontrol OK, to the accept() slot and a
-    \uicontrol Cancel button to the reject() slot.
-    Alternatively you can call the done() slot with \c Accepted or
-    \c Rejected.
+    provide a useful \l{#return}{return value}. To close the dialog
+    and return the appropriate value, you must connect a default button,
+    e.g. an \uicontrol OK button to the accept() slot and a
+    \uicontrol Cancel button to the reject() slot. Alternatively, you
+    can call the done() slot with \c Accepted or \c Rejected.
 
     An alternative is to call setModal(true) or setWindowModality(),
     then show(). Unlike exec(), show() returns control to the caller
@@ -384,7 +428,7 @@ QDialog::~QDialog()
 /*!
   \internal
   This function is called by the push button \a pushButton when it
-  becomes the default button. If \a pushButton is 0, the dialogs
+  becomes the default button. If \a pushButton is \nullptr, the dialogs
   default default button becomes the default button. This is what a
   push button calls when it loses focus.
 */
@@ -590,17 +634,8 @@ int QDialog::exec()
 void QDialog::done(int r)
 {
     Q_D(QDialog);
-    setResult(r);
-    hide();
-
-    d->close_helper(QWidgetPrivate::CloseNoEvent);
-    d->resetModalitySetByOpen();
-
-    emit finished(r);
-    if (r == Accepted)
-        emit accepted();
-    else if (r == Rejected)
-        emit rejected();
+    d->hide(r);
+    d->finalize(r, r);
 }
 
 /*!
@@ -750,7 +785,12 @@ void QDialog::setVisible(bool visible)
             return;
 
         QWidget::setVisible(visible);
+#if QT_DEPRECATED_SINCE(5, 13)
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
         showExtension(d->doShowExtension);
+QT_WARNING_POP
+#endif
         QWidget *fw = window()->focusWidget();
         if (!fw)
             fw = this;
@@ -917,6 +957,7 @@ void QDialog::adjustPosition(QWidget* w)
     move(p);
 }
 
+#if QT_DEPRECATED_SINCE(5, 13)
 /*!
     \obsolete
 
@@ -959,7 +1000,7 @@ Qt::Orientation QDialog::orientation() const
 
     Sets the widget, \a extension, to be the dialog's extension,
     deleting any previous extension. The dialog takes ownership of the
-    extension. Note that if 0 is passed any existing extension will be
+    extension. Note that if \nullptr is passed, any existing extension will be
     deleted. This function must only be called while the dialog is hidden.
 
     Instead of using this functionality, we recommend that you simply call
@@ -985,7 +1026,7 @@ void QDialog::setExtension(QWidget* extension)
 /*!
     \obsolete
 
-    Returns the dialog's extension or 0 if no extension has been
+    Returns the dialog's extension or \nullptr if no extension has been
     defined.
 
     Instead of using this functionality, we recommend that you simply call
@@ -1061,7 +1102,7 @@ void QDialog::showExtension(bool showIt)
 #endif
     }
 }
-
+#endif
 
 /*! \reimp */
 QSize QDialog::sizeHint() const
diff --git a/src/widgets/dialogs/qdialog.h b/src/widgets/dialogs/qdialog.h
index 7f267dd939..ce2194a1de 100644
--- a/src/widgets/dialogs/qdialog.h
+++ b/src/widgets/dialogs/qdialog.h
@@ -69,11 +69,12 @@ public:
 
     void setVisible(bool visible) override;
 
-    void setOrientation(Qt::Orientation orientation);
-    Qt::Orientation orientation() const;
-
-    void setExtension(QWidget* extension);
-    QWidget* extension() const;
+#if QT_DEPRECATED_SINCE(5, 13)
+    QT_DEPRECATED_X("Use show/hide on the affected widget instead") void setOrientation(Qt::Orientation orientation);
+    QT_DEPRECATED_X("Use show/hide on the affected widget instead") Qt::Orientation orientation() const;
+    QT_DEPRECATED_X("Use show/hide on the affected widget instead") void setExtension(QWidget* extension);
+    QT_DEPRECATED_X("Use show/hide on the affected widget instead") QWidget* extension() const;
+#endif
 
     QSize sizeHint() const override;
     QSize minimumSizeHint() const override;
@@ -96,7 +97,9 @@ public Q_SLOTS:
     virtual void accept();
     virtual void reject();
 
-    void showExtension(bool);
+#if QT_DEPRECATED_SINCE(5, 13)
+    QT_DEPRECATED_X("Use show/hide on the affected widget instead") void showExtension(bool);
+#endif
 
 protected:
     QDialog(QDialogPrivate &, QWidget *parent, Qt::WindowFlags f = Qt::WindowFlags());
diff --git a/src/widgets/dialogs/qdialog_p.h b/src/widgets/dialogs/qdialog_p.h
index 99fff08e65..74f775a0bd 100644
--- a/src/widgets/dialogs/qdialog_p.h
+++ b/src/widgets/dialogs/qdialog_p.h
@@ -75,19 +75,19 @@ public:
     QDialogPrivate()
         :
 #if QT_CONFIG(pushbutton)
-          mainDef(0),
+          mainDef(nullptr),
 #endif
-          orientation(Qt::Horizontal),extension(0), doShowExtension(false),
+          orientation(Qt::Horizontal),extension(nullptr), doShowExtension(false),
 #if QT_CONFIG(sizegrip)
-          resizer(0),
+          resizer(nullptr),
           sizeGripEnabled(false),
 #endif
-          rescode(0), resetModalityTo(-1), wasModalitySet(true), eventLoop(0),
-          nativeDialogInUse(false), m_platformHelper(0), m_platformHelperCreated(false)
+          rescode(0), resetModalityTo(-1), wasModalitySet(true), eventLoop(nullptr),
+          nativeDialogInUse(false), m_platformHelper(nullptr), m_platformHelperCreated(false)
         {}
     ~QDialogPrivate();
 
-    QWindow *parentWindow() const;
+    QWindow *transientParentWindow() const;
     bool setNativeDialogVisible(bool visible);
     QVariant styleHint(QPlatformDialogHelper::StyleHint hint) const;
     void deletePlatformHelper();
@@ -122,6 +122,9 @@ public:
     QPlatformDialogHelper *platformHelper() const;
     virtual bool canBeNativeDialog() const;
 
+    void hide(int resultCode);
+    void finalize(int resultCode, int dialogCode);
+
 private:
     virtual void initHelper(QPlatformDialogHelper *) {}
     virtual void helperPrepareShow(QPlatformDialogHelper *) {}
@@ -137,14 +140,14 @@ class QAutoPointer {
     struct internal { void func() {} };
     typedef void (internal::*RestrictedBool)();
 public:
-    explicit QAutoPointer(T *t) Q_DECL_NOTHROW : o(t) {}
+    explicit QAutoPointer(T *t) noexcept : o(t) {}
     ~QAutoPointer() { delete o; }
 
-    T *operator->() const Q_DECL_NOTHROW { return get(); }
-    T *get() const Q_DECL_NOTHROW { return o; }
+    T *operator->() const noexcept { return get(); }
+    T *get() const noexcept { return o; }
     T &operator*() const { return *get(); }
-    operator RestrictedBool() const Q_DECL_NOTHROW { return o ? &internal::func : nullptr; }
-    bool operator!() const Q_DECL_NOTHROW { return !o; }
+    operator RestrictedBool() const noexcept { return o ? &internal::func : nullptr; }
+    bool operator!() const noexcept { return !o; }
 private:
     Q_DISABLE_COPY(QAutoPointer);
 };
diff --git a/src/widgets/dialogs/qerrormessage.cpp b/src/widgets/dialogs/qerrormessage.cpp
index fd68f19680..51a3e080bf 100644
--- a/src/widgets/dialogs/qerrormessage.cpp
+++ b/src/widgets/dialogs/qerrormessage.cpp
@@ -322,8 +322,8 @@ bool QErrorMessagePrivate::nextPending()
 #else
             errors->setPlainText(message);
 #endif
-            currentMessage = qMove(message);
-            currentType = qMove(type);
+            currentMessage = std::move(message);
+            currentType = std::move(type);
             return true;
         }
     }
diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index 870a833b34..fcac12068d 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -57,9 +57,13 @@
 #include <qmessagebox.h>
 #endif
 #include <stdlib.h>
+#if QT_CONFIG(settings)
 #include <qsettings.h>
+#endif
 #include <qdebug.h>
+#if QT_CONFIG(mimetype)
 #include <qmimedatabase.h>
+#endif
 #include <qapplication.h>
 #include <qstylepainter.h>
 #include "ui_qfiledialog.h"
@@ -69,6 +73,11 @@
 #elif defined(Q_OS_WIN)
 #  include <QtCore/qt_windows.h>
 #endif
+#if defined(Q_OS_WASM)
+#include <private/qwasmlocalfileaccess_p.h>
+#endif
+
+#include <algorithm>
 
 QT_BEGIN_NAMESPACE
 
@@ -219,6 +228,9 @@ Q_GLOBAL_STATIC(QUrl, lastVisitedDir)
     of QFileDialog that contains the Q_OBJECT macro, or the platform
     does not have a native dialog of the type that you require.
 
+    \note This option must be set before changing dialog properties
+    or showing the dialog.
+
     \value ReadOnly Indicates that the model is readonly.
 
     \value HideNameFilterDetails Indicates if the file name filter details are
@@ -381,7 +393,7 @@ QFileDialog::QFileDialog(const QFileDialogArgs &args)
 */
 QFileDialog::~QFileDialog()
 {
-#ifndef QT_NO_SETTINGS
+#if QT_CONFIG(settings)
     Q_D(QFileDialog);
     d->saveSettings();
 #endif
@@ -577,10 +589,13 @@ void QFileDialogPrivate::retranslateWindowTitle()
         return;
     if (q->acceptMode() == QFileDialog::AcceptOpen) {
         const QFileDialog::FileMode fileMode = q->fileMode();
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
         if (fileMode == QFileDialog::DirectoryOnly || fileMode == QFileDialog::Directory)
             q->setWindowTitle(QFileDialog::tr("Find Directory"));
         else
             q->setWindowTitle(QFileDialog::tr("Open"));
+QT_WARNING_POP
     } else
         q->setWindowTitle(QFileDialog::tr("Save As"));
 
@@ -604,7 +619,10 @@ void QFileDialogPrivate::updateFileNameLabel()
         setLabelTextControl(QFileDialog::FileName, options->labelText(QFileDialogOptions::FileName));
     } else {
         switch (q_func()->fileMode()) {
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
         case QFileDialog::DirectoryOnly:
+QT_WARNING_POP
         case QFileDialog::Directory:
             setLabelTextControl(QFileDialog::FileName, QFileDialog::tr("Directory:"));
             break;
@@ -632,7 +650,10 @@ void QFileDialogPrivate::updateOkButtonText(bool saveAsOnFolder)
         return;
     } else {
         switch (q->fileMode()) {
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
         case QFileDialog::DirectoryOnly:
+QT_WARNING_POP
         case QFileDialog::Directory:
             setLabelTextControl(QFileDialog::Accept, QFileDialog::tr("&Choose"));
             break;
@@ -720,6 +741,16 @@ bool QFileDialogPrivate::usingWidgets() const
     Sets the given \a option to be enabled if \a on is true; otherwise,
     clears the given \a option.
 
+    Options (particularly the DontUseNativeDialogs option) should be set
+    before changing dialog properties or showing the dialog.
+
+    Setting options while the dialog is visible is not guaranteed to have
+    an immediate effect on the dialog (depending on the option and on the
+    platform).
+
+    Setting options after changing other properties may cause these
+    values to have no effect.
+
     \sa options, testOption()
 */
 void QFileDialog::setOption(Option option, bool on)
@@ -750,9 +781,15 @@ bool QFileDialog::testOption(Option option) const
 
     By default, all options are disabled.
 
-    Options should be set before showing the dialog. Setting them while the
-    dialog is visible is not guaranteed to have an immediate effect on the
-    dialog (depending on the option and on the platform).
+    Options (particularly the DontUseNativeDialogs option) should be set
+    before changing dialog properties or showing the dialog.
+
+    Setting options while the dialog is visible is not guaranteed to have
+    an immediate effect on the dialog (depending on the option and on the
+    platform).
+
+    Setting options after changing other properties may cause these
+    values to have no effect.
 
     \sa setOption(), testOption()
 */
@@ -1336,6 +1373,7 @@ void QFileDialog::setNameFilter(const QString &filter)
 }
 
 
+#if QT_DEPRECATED_SINCE(5, 13)
 /*!
     \property QFileDialog::nameFilterDetailsVisible
     \obsolete
@@ -1357,6 +1395,7 @@ bool QFileDialog::isNameFilterDetailsVisible() const
 {
     return !testOption(HideNameFilterDetails);
 }
+#endif
 
 
 /*
@@ -1518,7 +1557,7 @@ void QFileDialog::setFilter(QDir::Filters filters)
     d->showHiddenAction->setChecked((filters & QDir::Hidden));
 }
 
-#ifndef QT_NO_MIMETYPE
+#if QT_CONFIG(mimetype)
 
 static QString nameFilterForMime(const QString &mimeType)
 {
@@ -1599,7 +1638,7 @@ void QFileDialog::selectMimeTypeFilter(const QString &filter)
     }
 }
 
-#endif // QT_NO_MIMETYPE
+#endif // mimetype
 
 /*!
  * \since 5.9
@@ -1612,7 +1651,7 @@ QString QFileDialog::selectedMimeTypeFilter() const
     if (!d->usingWidgets())
         mimeTypeFilter = d->selectedMimeTypeFilter_sys();
 
-#ifndef QT_NO_MIMETYPE
+#if QT_CONFIG(mimetype)
     if (mimeTypeFilter.isNull() && !d->options->mimeTypeFilters().isEmpty()) {
         const auto nameFilter = selectedNameFilter();
         const auto mimeTypes = d->options->mimeTypeFilters();
@@ -1681,7 +1720,10 @@ void QFileDialog::setFileMode(QFileDialog::FileMode mode)
     d->options->setFileMode(static_cast<QFileDialogOptions::FileMode>(mode));
 
     // keep ShowDirsOnly option in sync with fileMode (BTW, DirectoryOnly is obsolete)
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     setOption(ShowDirsOnly, mode == DirectoryOnly);
+QT_WARNING_POP
 
     if (!d->usingWidgets())
         return;
@@ -1699,11 +1741,14 @@ void QFileDialog::setFileMode(QFileDialog::FileMode mode)
     // set filter
     d->model->setFilter(d->filterForMode(filter()));
     // setup file type for directory
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     if (mode == DirectoryOnly || mode == Directory) {
         d->qFileDialogUi->fileTypeCombo->clear();
         d->qFileDialogUi->fileTypeCombo->addItem(tr("Directories"));
         d->qFileDialogUi->fileTypeCombo->setEnabled(false);
     }
+QT_WARNING_POP
     d->updateFileNameLabel();
     d->updateOkButtonText();
     d->qFileDialogUi->fileTypeCombo->setEnabled(!testOption(ShowDirsOnly));
@@ -1836,6 +1881,7 @@ QFileDialog::AcceptMode QFileDialog::acceptMode() const
     return static_cast<AcceptMode>(d->options->acceptMode());
 }
 
+#if QT_DEPRECATED_SINCE(5, 13)
 /*!
     \property QFileDialog::readOnly
     \obsolete
@@ -1895,6 +1941,7 @@ bool QFileDialog::confirmOverwrite() const
 {
     return !testOption(DontConfirmOverwrite);
 }
+#endif
 
 /*!
     \property QFileDialog::defaultSuffix
@@ -2099,8 +2146,8 @@ QString QFileDialog::labelText(DialogLabel label) const
     \snippet code/src_gui_dialogs_qfiledialog.cpp 8
 
     The function creates a modal file dialog with the given \a parent widget.
-    If \a parent is not 0, the dialog will be shown centered over the parent
-    widget.
+    If \a parent is not \nullptr, the dialog will be shown centered over the
+    parent widget.
 
     The file dialog's working directory will be set to \a dir. If \a dir
     includes a file name, the file will be selected. Only files that match the
@@ -2109,9 +2156,7 @@ QString QFileDialog::labelText(DialogLabel label) const
     strings. If you want multiple filters, separate them with ';;', for
     example:
 
-    \code
-    "Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
-    \endcode
+    \snippet code/src_gui_dialogs_qfiledialog.cpp 14
 
     The \a options argument holds various options about how to run the dialog,
     see the QFileDialog::Option enum for more information on the flags you can
@@ -2124,8 +2169,8 @@ QString QFileDialog::labelText(DialogLabel label) const
     native file dialog and not a QFileDialog.
 
     On Windows the dialog will spin a blocking modal event loop that will not
-    dispatch any QTimers, and if \a parent is not 0 then it will position the
-    dialog just below the parent's title bar.
+    dispatch any QTimers, and if \a parent is not \nullptr then it will position
+    the dialog just below the parent's title bar.
 
     On Unix/X11, the normal behavior of the file dialog is to resolve and
     follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
@@ -2214,8 +2259,8 @@ QUrl QFileDialog::getOpenFileUrl(QWidget *parent,
     \snippet code/src_gui_dialogs_qfiledialog.cpp 9
 
     This function creates a modal file dialog with the given \a parent widget.
-    If \a parent is not 0, the dialog will be shown centered over the parent
-    widget.
+    If \a parent is not \nullptr, the dialog will be shown centered over the
+    parent widget.
 
     The file dialog's working directory will be set to \a dir. If \a dir
     includes a file name, the file will be selected. The filter is set to
@@ -2224,9 +2269,7 @@ QUrl QFileDialog::getOpenFileUrl(QWidget *parent,
     \a selectedFilter and \a filter may be empty strings. If you need multiple
     filters, separate them with ';;', for instance:
 
-    \code
-    "Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
-    \endcode
+    \snippet code/src_gui_dialogs_qfiledialog.cpp 14
 
     The dialog's caption is set to \a caption. If \a caption is not specified
     then a default caption will be used.
@@ -2235,8 +2278,8 @@ QUrl QFileDialog::getOpenFileUrl(QWidget *parent,
     native file dialog and not a QFileDialog.
 
     On Windows the dialog will spin a blocking modal event loop that will not
-    dispatch any QTimers, and if \a parent is not 0 then it will position the
-    dialog just below the parent's title bar.
+    dispatch any QTimers, and if \a parent is not \nullptr then it will position
+    the dialog just below the parent's title bar.
 
     On Unix/X11, the normal behavior of the file dialog is to resolve and
     follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
@@ -2325,12 +2368,91 @@ QList<QUrl> QFileDialog::getOpenFileUrls(QWidget *parent,
 }
 
 /*!
+    This is a convenience static function that will return the content of a file
+    selected by the user.
+
+    This function is used to access local files on Qt for WebAssembly, where the web
+    sandbox places restrictions on how such access may happen. Its implementation will
+    make the browser display a native file dialog, where the user makes the file selection.
+
+    It can also be used on other platforms, where it will fall back to using QFileDialog.
+
+    The function is asynchronous and returns immediately. The \a fileOpenCompleted
+    callback will be called when a file has been selected and its contents has been
+    read into memory.
+
+    \snippet code/src_gui_dialogs_qfiledialog.cpp 14
+    \since 5.13
+*/
+void QFileDialog::getOpenFileContent(const QString &nameFilter, const std::function<void(const QString &, const QByteArray &)> &fileOpenCompleted)
+{
+#ifdef Q_OS_WASM
+    auto openFileImpl = std::make_shared<std::function<void(void)>>();
+    QString fileName;
+    QByteArray fileContent;
+    *openFileImpl = [=]() mutable {
+        auto fileDialogClosed = [&](bool fileSelected) {
+            if (!fileSelected) {
+                fileOpenCompleted(fileName, fileContent);
+                openFileImpl.reset();
+            }
+        };
+        auto acceptFile = [&](uint64_t size, const std::string name) -> char * {
+            const uint64_t twoGB = 1ULL << 31; // QByteArray limit
+            if (size > twoGB)
+                return nullptr;
+
+            fileName = QString::fromStdString(name);
+            fileContent.resize(size);
+            return fileContent.data();
+        };
+        auto fileContentReady = [&]() mutable {
+            fileOpenCompleted(fileName, fileContent);
+            openFileImpl.reset();
+        };
+
+        auto qtFilterStringToWebAcceptString = [](const QString &qtString) {
+            // The Qt and Web name filter string formats are similar, but
+            // not identical.
+            return qtString.toStdString(); // ### TODO
+        };
+
+        QWasmLocalFileAccess::openFile(qtFilterStringToWebAcceptString(nameFilter), fileDialogClosed, acceptFile, fileContentReady);
+    };
+
+    (*openFileImpl)();
+#else
+    QFileDialog *dialog = new QFileDialog();
+    dialog->selectNameFilter(nameFilter);
+
+    auto fileSelected = [=](const QString &fileName) {
+        QByteArray fileContent;
+        if (!fileName.isNull()) {
+            QFile selectedFile(fileName);
+            selectedFile.open(QIODevice::ReadOnly);
+            fileContent = selectedFile.readAll();
+        }
+        fileOpenCompleted(fileName, fileContent);
+    };
+
+    auto dialogClosed = [=](int code) {
+        Q_UNUSED(code);
+        delete dialog;
+    };
+
+    connect(dialog, &QFileDialog::fileSelected, fileSelected);
+    connect(dialog, &QFileDialog::finished, dialogClosed);
+    dialog->show();
+#endif
+}
+
+/*!
     This is a convenience static function that will return a file name selected
     by the user. The file does not have to exist.
 
     It creates a modal file dialog with the given \a parent widget. If
-    \a parent is not 0, the dialog will be shown centered over the parent
-    widget.
+    \a parent is not \nullptr, the dialog will be shown centered over the
+    parent widget.
 
     \snippet code/src_gui_dialogs_qfiledialog.cpp 11
 
@@ -2340,9 +2462,7 @@ QList<QUrl> QFileDialog::getOpenFileUrls(QWidget *parent,
     parameters \a dir, \a selectedFilter, and \a filter may be empty strings.
     Multiple filters are separated with ';;'. For instance:
 
-    \code
-    "Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
-    \endcode
+    \snippet code/src_gui_dialogs_qfiledialog.cpp 14
 
     The \a options argument holds various options about how to run the dialog,
     see the QFileDialog::Option enum for more information on the flags you can
@@ -2358,9 +2478,9 @@ QList<QUrl> QFileDialog::getOpenFileUrls(QWidget *parent,
     native file dialog and not a QFileDialog.
 
     On Windows the dialog will spin a blocking modal event loop that will not
-    dispatch any QTimers, and if \a parent is not 0 then it will position the
-    dialog just below the parent's title bar. On \macos, with its native file
-    dialog, the filter argument is ignored.
+    dispatch any QTimers, and if \a parent is not \nullptr then it will
+    position the  dialog just below the parent's title bar. On \macos, with its
+    native file dialog, the filter argument is ignored.
 
     On Unix/X11, the normal behavior of the file dialog is to resolve and
     follow symlinks. For example, if \c{/usr/tmp} is a symlink to \c{/var/tmp},
@@ -2450,8 +2570,8 @@ QUrl QFileDialog::getSaveFileUrl(QWidget *parent,
     \snippet code/src_gui_dialogs_qfiledialog.cpp 12
 
     This function creates a modal file dialog with the given \a parent widget.
-    If \a parent is not 0, the dialog will be shown centered over the parent
-    widget.
+    If \a parent is not \nullptr, the dialog will be shown centered over the
+    parent widget.
 
     The dialog's working directory is set to \a dir, and the caption is set to
     \a caption. Either of these may be an empty string in which case the
@@ -2475,8 +2595,8 @@ QUrl QFileDialog::getSaveFileUrl(QWidget *parent,
     symlinks as regular directories.
 
     On Windows, the dialog will spin a blocking modal event loop that will not
-    dispatch any QTimers, and if \a parent is not 0 then it will position the
-    dialog just below the parent's title bar.
+    dispatch any QTimers, and if \a parent is not \nullptr then it will position
+    the dialog just below the parent's title bar.
 
     \warning Do not delete \a parent during the execution of the dialog. If you
     want to do this, you should create the dialog yourself using one of the
@@ -2531,7 +2651,10 @@ QUrl QFileDialog::getExistingDirectoryUrl(QWidget *parent,
     args.parent = parent;
     args.caption = caption;
     args.directory = QFileDialogPrivate::workingDirectory(dir);
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     args.mode = (options & ShowDirsOnly ? DirectoryOnly : Directory);
+QT_WARNING_POP
     args.options = options;
 
     QFileDialog dialog(args);
@@ -2644,7 +2767,10 @@ void QFileDialog::accept()
     }
 
     switch (fileMode()) {
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     case DirectoryOnly:
+QT_WARNING_POP
     case Directory: {
         QString fn = files.first();
         QFileInfo info(fn);
@@ -2680,7 +2806,7 @@ void QFileDialog::accept()
         }
 
         // check if we have to ask for permission to overwrite the file
-        if (!info.exists() || !confirmOverwrite() || acceptMode() == AcceptOpen) {
+        if (!info.exists() || testOption(DontConfirmOverwrite) || acceptMode() == AcceptOpen) {
             d->emitFilesSelected(QStringList(fn));
             QDialog::accept();
 #if QT_CONFIG(messagebox)
@@ -2724,7 +2850,7 @@ void QFileDialog::accept()
     }
 }
 
-#ifndef QT_NO_SETTINGS
+#if QT_CONFIG(settings)
 void QFileDialogPrivate::saveSettings()
 {
     Q_Q(QFileDialog);
@@ -2782,7 +2908,7 @@ bool QFileDialogPrivate::restoreFromSettings()
 
     return restoreWidgetState(history, settings.value(QLatin1String("sidebarWidth"), -1).toInt());
 }
-#endif // QT_NO_SETTINGS
+#endif // settings
 
 bool QFileDialogPrivate::restoreWidgetState(QStringList &history, int splitterPosition)
 {
@@ -2849,13 +2975,17 @@ void QFileDialogPrivate::init(const QUrl &directory, const QString &nameFilter,
     q->setFileMode(QFileDialog::AnyFile);
     if (!nameFilter.isEmpty())
         q->setNameFilter(nameFilter);
+    // QTBUG-70798, prevent the default blocking the restore logic.
+    const bool dontStoreDir = !directory.isValid() && !lastVisitedDir()->isValid();
     q->setDirectoryUrl(workingDirectory(directory));
+    if (dontStoreDir)
+        lastVisitedDir()->clear();
     if (directory.isLocalFile())
         q->selectFile(initialSelection(directory));
     else
         q->selectUrl(directory);
 
-#ifndef QT_NO_SETTINGS
+#if QT_CONFIG(settings)
     // Try to restore from the FileDialog settings group; if it fails, fall back
     // to the pre-5.5 QByteArray serialized settings.
     if (!restoreFromSettings()) {
@@ -3020,7 +3150,7 @@ void QFileDialogPrivate::createWidgets()
     createToolButtons();
     createMenuActions();
 
-#ifndef QT_NO_SETTINGS
+#if QT_CONFIG(settings)
     // Try to restore from the FileDialog settings group; if it fails, fall back
     // to the pre-5.5 QByteArray serialized settings.
     if (!restoreFromSettings()) {
@@ -3037,7 +3167,7 @@ void QFileDialogPrivate::createWidgets()
     if (!options->sidebarUrls().isEmpty())
         q->setSidebarUrls(options->sidebarUrls());
     q->setDirectoryUrl(options->initialDirectory());
-#ifndef QT_NO_MIMETYPE
+#if QT_CONFIG(mimetype)
     if (!options->mimeTypeFilters().isEmpty())
         q->setMimeTypeFilters(options->mimeTypeFilters());
     else
@@ -3244,6 +3374,18 @@ void QFileDialogPrivate::_q_goHome()
     q->setDirectory(QDir::homePath());
 }
 
+
+void QFileDialogPrivate::saveHistorySelection()
+{
+    if (qFileDialogUi.isNull() || currentHistoryLocation < 0 || currentHistoryLocation >= currentHistory.size())
+        return;
+    auto &item = currentHistory[currentHistoryLocation];
+    item.selection.clear();
+    const auto selectedIndexes = qFileDialogUi->listView->selectionModel()->selectedRows();
+    for (const auto &index : selectedIndexes)
+        item.selection.append(QPersistentModelIndex(index));
+}
+
 /*!
     \internal
 
@@ -3257,17 +3399,49 @@ void QFileDialogPrivate::_q_pathChanged(const QString &newPath)
     qFileDialogUi->sidebar->selectUrl(QUrl::fromLocalFile(newPath));
     q->setHistory(qFileDialogUi->lookInCombo->history());
 
-    if (currentHistoryLocation < 0 || currentHistory.value(currentHistoryLocation) != QDir::toNativeSeparators(newPath)) {
+    const QString newNativePath = QDir::toNativeSeparators(newPath);
+
+    // equal paths indicate this was invoked by _q_navigateBack/Forward()
+    if (currentHistoryLocation < 0 || currentHistory.value(currentHistoryLocation).path != newNativePath) {
+        if (currentHistoryLocation >= 0)
+            saveHistorySelection();
         while (currentHistoryLocation >= 0 && currentHistoryLocation + 1 < currentHistory.count()) {
             currentHistory.removeLast();
         }
-        currentHistory.append(QDir::toNativeSeparators(newPath));
+        currentHistory.append({newNativePath, PersistentModelIndexList()});
         ++currentHistoryLocation;
     }
     qFileDialogUi->forwardButton->setEnabled(currentHistory.size() - currentHistoryLocation > 1);
     qFileDialogUi->backButton->setEnabled(currentHistoryLocation > 0);
 }
 
+void QFileDialogPrivate::navigate(HistoryItem &historyItem)
+{
+    Q_Q(QFileDialog);
+    q->setDirectory(historyItem.path);
+    // Restore selection unless something has changed in the file system
+    if (qFileDialogUi.isNull() || historyItem.selection.isEmpty())
+        return;
+    if (std::any_of(historyItem.selection.cbegin(), historyItem.selection.cend(),
+                    [](const QPersistentModelIndex &i) { return !i.isValid(); })) {
+        historyItem.selection.clear();
+        return;
+    }
+
+    QAbstractItemView *view = q->viewMode() == QFileDialog::List
+        ? static_cast<QAbstractItemView *>(qFileDialogUi->listView)
+        : static_cast<QAbstractItemView *>(qFileDialogUi->treeView);
+    auto selectionModel = view->selectionModel();
+    const QItemSelectionModel::SelectionFlags flags = QItemSelectionModel::Select
+        | QItemSelectionModel::Rows;
+    selectionModel->select(historyItem.selection.constFirst(),
+                           flags | QItemSelectionModel::Clear | QItemSelectionModel::Current);
+    for (int i = 1, size = historyItem.selection.size(); i < size; ++i)
+        selectionModel->select(historyItem.selection.at(i), flags);
+
+    view->scrollTo(historyItem.selection.constFirst());
+}
+
 /*!
     \internal
 
@@ -3275,11 +3449,9 @@ void QFileDialogPrivate::_q_pathChanged(const QString &newPath)
 */
 void QFileDialogPrivate::_q_navigateBackward()
 {
-    Q_Q(QFileDialog);
     if (!currentHistory.isEmpty() && currentHistoryLocation > 0) {
-        --currentHistoryLocation;
-        QString previousHistory = currentHistory.at(currentHistoryLocation);
-        q->setDirectory(previousHistory);
+        saveHistorySelection();
+        navigate(currentHistory[--currentHistoryLocation]);
     }
 }
 
@@ -3290,11 +3462,9 @@ void QFileDialogPrivate::_q_navigateBackward()
 */
 void QFileDialogPrivate::_q_navigateForward()
 {
-    Q_Q(QFileDialog);
     if (!currentHistory.isEmpty() && currentHistoryLocation < currentHistory.size() - 1) {
-        ++currentHistoryLocation;
-        QString nextHistory = currentHistory.at(currentHistoryLocation);
-        q->setDirectory(nextHistory);
+        saveHistorySelection();
+        navigate(currentHistory[++currentHistoryLocation]);
     }
 }
 
@@ -3544,7 +3714,10 @@ void QFileDialogPrivate::_q_updateOkButton()
         isOpenDirectory = true;
     } else {
         switch (fileMode) {
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
         case QFileDialog::DirectoryOnly:
+QT_WARNING_POP
         case QFileDialog::Directory: {
             QString fn = files.first();
             QModelIndex idx = model->index(fn);
@@ -3636,12 +3809,15 @@ void QFileDialogPrivate::_q_enterDirectory(const QModelIndex &index)
         const QFileDialog::FileMode fileMode = q->fileMode();
         q->setDirectory(path);
         emit q->directoryEntered(path);
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
         if (fileMode == QFileDialog::Directory
                 || fileMode == QFileDialog::DirectoryOnly) {
             // ### find out why you have to do both of these.
             lineEdit()->setText(QString());
             lineEdit()->clear();
         }
+QT_WARNING_POP
     } else {
         // Do not accept when shift-clicking to multi-select a file in environments with single-click-activation (KDE)
         if (!q->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick, nullptr, qFileDialogUi->treeView)
@@ -3674,7 +3850,7 @@ void QFileDialogPrivate::_q_goToDirectory(const QString &path)
     }
     QDir dir(path2);
     if (!dir.exists())
-        dir = getEnvironmentVariable(path2);
+        dir.setPath(getEnvironmentVariable(path2));
 
     if (dir.exists() || path2.isEmpty() || path2 == model->myComputer().toString()) {
         _q_enterDirectory(index);
@@ -3733,7 +3909,10 @@ void QFileDialogPrivate::_q_selectionChanged()
 {
     const QFileDialog::FileMode fileMode = q_func()->fileMode();
     const QModelIndexList indexes = qFileDialogUi->listView->selectionModel()->selectedRows();
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     bool stripDirs = (fileMode != QFileDialog::DirectoryOnly && fileMode != QFileDialog::Directory);
+QT_WARNING_POP
 
     QStringList allFiles;
     for (const auto &index : indexes) {
@@ -3785,10 +3964,13 @@ void QFileDialogPrivate::_q_rowsInserted(const QModelIndex &parent)
 void QFileDialogPrivate::_q_fileRenamed(const QString &path, const QString &oldName, const QString &newName)
 {
     const QFileDialog::FileMode fileMode = q_func()->fileMode();
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     if (fileMode == QFileDialog::Directory || fileMode == QFileDialog::DirectoryOnly) {
         if (path == rootPath() && lineEdit()->text() == oldName)
             lineEdit()->setText(newName);
     }
+QT_WARNING_POP
 }
 
 void QFileDialogPrivate::_q_emitUrlSelected(const QUrl &file)
diff --git a/src/widgets/dialogs/qfiledialog.h b/src/widgets/dialogs/qfiledialog.h
index 8646894750..95e03618ac 100644
--- a/src/widgets/dialogs/qfiledialog.h
+++ b/src/widgets/dialogs/qfiledialog.h
@@ -46,6 +46,8 @@
 #include <QtCore/qurl.h>
 #include <QtWidgets/qdialog.h>
 
+#include <functional>
+
 QT_REQUIRE_CONFIG(filedialog);
 
 QT_BEGIN_NAMESPACE
@@ -64,19 +66,22 @@ class Q_WIDGETS_EXPORT QFileDialog : public QDialog
     Q_PROPERTY(ViewMode viewMode READ viewMode WRITE setViewMode)
     Q_PROPERTY(FileMode fileMode READ fileMode WRITE setFileMode)
     Q_PROPERTY(AcceptMode acceptMode READ acceptMode WRITE setAcceptMode)
+    Q_PROPERTY(QString defaultSuffix READ defaultSuffix WRITE setDefaultSuffix)
+#if QT_DEPRECATED_SINCE(5, 13)
     Q_PROPERTY(bool readOnly READ isReadOnly WRITE setReadOnly DESIGNABLE false)
-    Q_PROPERTY(bool resolveSymlinks READ resolveSymlinks WRITE setResolveSymlinks DESIGNABLE false)
     Q_PROPERTY(bool confirmOverwrite READ confirmOverwrite WRITE setConfirmOverwrite DESIGNABLE false)
-    Q_PROPERTY(QString defaultSuffix READ defaultSuffix WRITE setDefaultSuffix)
+    Q_PROPERTY(bool resolveSymlinks READ resolveSymlinks WRITE setResolveSymlinks DESIGNABLE false)
     Q_PROPERTY(bool nameFilterDetailsVisible READ isNameFilterDetailsVisible
                WRITE setNameFilterDetailsVisible DESIGNABLE false)
+#endif
     Q_PROPERTY(Options options READ options WRITE setOptions)
     Q_PROPERTY(QStringList supportedSchemes READ supportedSchemes WRITE setSupportedSchemes)
 
 public:
     enum ViewMode { Detail, List };
     Q_ENUM(ViewMode)
-    enum FileMode { AnyFile, ExistingFile, Directory, ExistingFiles, DirectoryOnly };
+    enum FileMode { AnyFile, ExistingFile, Directory, ExistingFiles,
+                    DirectoryOnly Q_DECL_ENUMERATOR_DEPRECATED_X("Use setOption(ShowDirsOnly, true) instead")};
     Q_ENUM(FileMode)
     enum AcceptMode { AcceptOpen, AcceptSave };
     Q_ENUM(AcceptMode)
@@ -117,8 +122,12 @@ public:
     void selectUrl(const QUrl &url);
     QList<QUrl> selectedUrls() const;
 
+#if QT_DEPRECATED_SINCE(5, 13)
+    QT_DEPRECATED_X("Use setOption(HideNameFilterDetails, !enabled) instead")
     void setNameFilterDetailsVisible(bool enabled);
+    QT_DEPRECATED_X("Use !testOption(HideNameFilterDetails) instead")
     bool isNameFilterDetailsVisible() const;
+#endif
 
     void setNameFilter(const QString &filter);
     void setNameFilters(const QStringList &filters);
@@ -127,7 +136,7 @@ public:
     QString selectedMimeTypeFilter() const;
     QString selectedNameFilter() const;
 
-#ifndef QT_NO_MIMETYPE
+#if QT_CONFIG(mimetype)
     void setMimeTypeFilters(const QStringList &filters);
     QStringList mimeTypeFilters() const;
     void selectMimeTypeFilter(const QString &filter);
@@ -145,11 +154,15 @@ public:
     void setAcceptMode(AcceptMode mode);
     AcceptMode acceptMode() const;
 
+#if QT_DEPRECATED_SINCE(5, 13)
     void setReadOnly(bool enabled);
     bool isReadOnly() const;
 
+    QT_DEPRECATED_X("Use setOption(DontResolveSymlinks, !enabled) instead")
     void setResolveSymlinks(bool enabled);
+    QT_DEPRECATED_X("Use !testOption(DontResolveSymlinks) instead")
     bool resolveSymlinks() const;
+#endif
 
     void setSidebarUrls(const QList<QUrl> &urls);
     QList<QUrl> sidebarUrls() const;
@@ -157,8 +170,12 @@ public:
     QByteArray saveState() const;
     bool restoreState(const QByteArray &state);
 
+#if QT_DEPRECATED_SINCE(5, 13)
+    QT_DEPRECATED_X("Use setOption(DontConfirmOverwrite, !enabled) instead")
     void setConfirmOverwrite(bool enabled);
+    QT_DEPRECATED_X("Use !testOption(DontConfirmOverwrite) instead")
     bool confirmOverwrite() const;
+#endif
 
     void setDefaultSuffix(const QString &suffix);
     QString defaultSuffix() const;
@@ -263,6 +280,8 @@ public:
                                        Options options = Options(),
                                        const QStringList &supportedSchemes = QStringList());
 
+    static void getOpenFileContent(const QString &nameFilter,
+                                   const std::function<void(const QString &, const QByteArray &)> &fileContentsReady);
 
 protected:
     QFileDialog(const QFileDialogArgs &args);
diff --git a/src/widgets/dialogs/qfiledialog_p.h b/src/widgets/dialogs/qfiledialog_p.h
index 3a93a53911..dcf147348f 100644
--- a/src/widgets/dialogs/qfiledialog_p.h
+++ b/src/widgets/dialogs/qfiledialog_p.h
@@ -98,7 +98,7 @@ class QPlatformDialogHelper;
 
 struct QFileDialogArgs
 {
-    QFileDialogArgs() : parent(0), mode(QFileDialog::AnyFile) {}
+    QFileDialogArgs() : parent(nullptr), mode(QFileDialog::AnyFile) {}
 
     QWidget *parent;
     QString caption;
@@ -116,6 +116,14 @@ class Q_WIDGETS_EXPORT QFileDialogPrivate : public QDialogPrivate
     Q_DECLARE_PUBLIC(QFileDialog)
 
 public:
+    using PersistentModelIndexList = QVector<QPersistentModelIndex>;
+
+    struct HistoryItem
+    {
+        QString path;
+        PersistentModelIndexList selection;
+    };
+
     QFileDialogPrivate();
 
     QPlatformFileDialogHelper *platformFileDialogHelper() const
@@ -164,13 +172,9 @@ public:
 
     QDir::Filters filterForMode(QDir::Filters filters) const
     {
-        const QFileDialog::FileMode fileMode = q_func()->fileMode();
-        if (fileMode == QFileDialog::DirectoryOnly) {
-            filters |= QDir::Drives | QDir::AllDirs | QDir::Dirs;
+        filters |= QDir::Drives | QDir::AllDirs | QDir::Dirs | QDir::Files;
+        if (q_func()->testOption(QFileDialog::ShowDirsOnly))
             filters &= ~QDir::Files;
-        } else {
-            filters |= QDir::Drives | QDir::AllDirs | QDir::Files | QDir::Dirs;
-        }
         return filters;
     }
 
@@ -187,7 +191,7 @@ public:
 #endif
     }
 
-#ifndef QT_NO_SETTINGS
+#if QT_CONFIG(settings)
     void saveSettings();
     bool restoreFromSettings();
 #endif
@@ -197,9 +201,11 @@ public:
     void retranslateWindowTitle();
     void retranslateStrings();
     void emitFilesSelected(const QStringList &files);
+    void saveHistorySelection();
 
     void _q_goHome();
     void _q_pathChanged(const QString &);
+    void navigate(HistoryItem &);
     void _q_navigateBackward();
     void _q_navigateForward();
     void _q_navigateToParent();
@@ -241,7 +247,7 @@ public:
 
     QString setWindowTitle;
 
-    QStringList currentHistory;
+    QList<HistoryItem> currentHistory;
     int currentHistoryLocation;
 
     QAction *renameAction;
@@ -290,13 +296,13 @@ private:
     virtual void helperPrepareShow(QPlatformDialogHelper *) override;
     virtual void helperDone(QDialog::DialogCode, QPlatformDialogHelper *) override;
 
-    Q_DISABLE_COPY(QFileDialogPrivate)
+    Q_DISABLE_COPY_MOVE(QFileDialogPrivate)
 };
 
 class QFileDialogLineEdit : public QLineEdit
 {
 public:
-    QFileDialogLineEdit(QWidget *parent = 0) : QLineEdit(parent), d_ptr(0){}
+    QFileDialogLineEdit(QWidget *parent = nullptr) : QLineEdit(parent), d_ptr(nullptr){}
     void setFileDialogPrivate(QFileDialogPrivate *d_pointer) {d_ptr = d_pointer; }
     void keyPressEvent(QKeyEvent *e) override;
     bool hideOnEsc;
@@ -307,7 +313,7 @@ private:
 class QFileDialogComboBox : public QComboBox
 {
 public:
-    QFileDialogComboBox(QWidget *parent = 0) : QComboBox(parent), urlModel(0) {}
+    QFileDialogComboBox(QWidget *parent = nullptr) : QComboBox(parent), urlModel(nullptr) {}
     void setFileDialogPrivate(QFileDialogPrivate *d_pointer);
     void showPopup() override;
     void setHistory(const QStringList &paths);
@@ -323,7 +329,7 @@ private:
 class QFileDialogListView : public QListView
 {
 public:
-    QFileDialogListView(QWidget *parent = 0);
+    QFileDialogListView(QWidget *parent = nullptr);
     void setFileDialogPrivate(QFileDialogPrivate *d_pointer);
     QSize sizeHint() const override;
 protected:
diff --git a/src/widgets/dialogs/qfileinfogatherer_p.h b/src/widgets/dialogs/qfileinfogatherer_p.h
index 134a14b7ce..795f60249f 100644
--- a/src/widgets/dialogs/qfileinfogatherer_p.h
+++ b/src/widgets/dialogs/qfileinfogatherer_p.h
@@ -166,7 +166,7 @@ Q_SIGNALS:
     void directoryLoaded(const QString &path);
 
 public:
-    explicit QFileInfoGatherer(QObject *parent = 0);
+    explicit QFileInfoGatherer(QObject *parent = nullptr);
     ~QFileInfoGatherer();
 
 #if QT_CONFIG(filesystemwatcher) && defined(Q_OS_WIN)
diff --git a/src/widgets/dialogs/qfilesystemmodel.cpp b/src/widgets/dialogs/qfilesystemmodel.cpp
index 8b3549c3f5..d29f74e93d 100644
--- a/src/widgets/dialogs/qfilesystemmodel.cpp
+++ b/src/widgets/dialogs/qfilesystemmodel.cpp
@@ -2032,8 +2032,7 @@ bool QFileSystemModelPrivate::passNameFilters(const QFileSystemNode *node) const
                                             : QRegularExpression::CaseInsensitiveOption;
 
         for (const auto &nameFilter : nameFilters) {
-            const QString wildcard = QRegularExpression::wildcardToRegularExpression(nameFilter);
-            QRegularExpression rx(QRegularExpression::anchoredPattern(wildcard), options);
+            QRegularExpression rx(QRegularExpression::wildcardToRegularExpression(nameFilter), options);
             QRegularExpressionMatch match = rx.match(node->fileName);
             if (match.hasMatch())
                 return true;
diff --git a/src/widgets/dialogs/qfilesystemmodel_p.h b/src/widgets/dialogs/qfilesystemmodel_p.h
index 9c432e1ae6..d8f9f2b076 100644
--- a/src/widgets/dialogs/qfilesystemmodel_p.h
+++ b/src/widgets/dialogs/qfilesystemmodel_p.h
@@ -99,13 +99,13 @@ public:
     class QFileSystemNode
     {
     public:
-        explicit QFileSystemNode(const QString &filename = QString(), QFileSystemNode *p = 0)
-            : fileName(filename), populatedChildren(false), isVisible(false), dirtyChildrenIndex(-1), parent(p), info(0) {}
+        explicit QFileSystemNode(const QString &filename = QString(), QFileSystemNode *p = nullptr)
+            : fileName(filename), populatedChildren(false), isVisible(false), dirtyChildrenIndex(-1), parent(p), info(nullptr) {}
         ~QFileSystemNode() {
             qDeleteAll(children);
             delete info;
-            info = 0;
-            parent = 0;
+            info = nullptr;
+            parent = nullptr;
         }
 
         QString fileName;
@@ -116,7 +116,7 @@ public:
         inline qint64 size() const { if (info && !info->isDir()) return info->size(); return 0; }
         inline QString type() const { if (info) return info->displayType; return QLatin1String(""); }
         inline QDateTime lastModified() const { if (info) return info->lastModified(); return QDateTime(); }
-        inline QFile::Permissions permissions() const { if (info) return info->permissions(); return 0; }
+        inline QFile::Permissions permissions() const { if (info) return info->permissions(); return nullptr; }
         inline bool isReadable() const { return ((permissions() & QFile::ReadUser) != 0); }
         inline bool isWritable() const { return ((permissions() & QFile::WriteUser) != 0); }
         inline bool isExecutable() const { return ((permissions() & QFile::ExeUser) != 0); }
@@ -162,7 +162,7 @@ public:
             return info && (*info == fileInfo);
         }
 
-        inline bool hasInformation() const { return info != 0; }
+        inline bool hasInformation() const { return info != nullptr; }
 
         void populate(const QExtendedInformation &fileInfo) {
             if (!info)
diff --git a/src/widgets/dialogs/qfscompleter_p.h b/src/widgets/dialogs/qfscompleter_p.h
index 3b829d4a52..f5110a7622 100644
--- a/src/widgets/dialogs/qfscompleter_p.h
+++ b/src/widgets/dialogs/qfscompleter_p.h
@@ -64,8 +64,8 @@ QT_BEGIN_NAMESPACE
   */
 class Q_WIDGETS_EXPORT QFSCompleter :  public QCompleter {
 public:
-    explicit QFSCompleter(QFileSystemModel *model, QObject *parent = 0)
-        : QCompleter(model, parent), proxyModel(0), sourceModel(model)
+    explicit QFSCompleter(QFileSystemModel *model, QObject *parent = nullptr)
+        : QCompleter(model, parent), proxyModel(nullptr), sourceModel(model)
     {
 #if defined(Q_OS_WIN)
         setCaseSensitivity(Qt::CaseInsensitive);
diff --git a/src/widgets/dialogs/qinputdialog.cpp b/src/widgets/dialogs/qinputdialog.cpp
index 5a7d6edddf..3cfe8367e0 100644
--- a/src/widgets/dialogs/qinputdialog.cpp
+++ b/src/widgets/dialogs/qinputdialog.cpp
@@ -168,6 +168,18 @@ private:
     }
 };
 
+class QInputDialogListView : public QListView
+{
+public:
+    QInputDialogListView(QWidget *parent = 0) : QListView(parent) {}
+    QVariant inputMethodQuery(Qt::InputMethodQuery query) const override
+    {
+        if (query == Qt::ImEnabled)
+            return false;
+        return QListView::inputMethodQuery(query);
+    }
+};
+
 class QInputDialogPrivate : public QDialogPrivate
 {
     Q_DECLARE_PUBLIC(QInputDialog)
@@ -201,7 +213,7 @@ public:
     mutable QSpinBox *intSpinBox;
     mutable QDoubleSpinBox *doubleSpinBox;
     mutable QComboBox *comboBox;
-    mutable QListView *listView;
+    mutable QInputDialogListView *listView;
     mutable QWidget *inputWidget;
     mutable QVBoxLayout *mainLayout;
     QInputDialog::InputDialogOptions opts;
@@ -298,8 +310,7 @@ void QInputDialogPrivate::ensureListView()
     Q_Q(QInputDialog);
     if (!listView) {
         ensureComboBox();
-
-        listView = new QListView(q);
+        listView = new QInputDialogListView(q);
         listView->hide();
         listView->setEditTriggers(QAbstractItemView::NoEditTriggers);
         listView->setSelectionMode(QAbstractItemView::SingleSelection);
diff --git a/src/widgets/dialogs/qmessagebox.cpp b/src/widgets/dialogs/qmessagebox.cpp
index 99157747dd..f143e3b527 100644
--- a/src/widgets/dialogs/qmessagebox.cpp
+++ b/src/widgets/dialogs/qmessagebox.cpp
@@ -113,7 +113,7 @@ public:
         , copyAvailable(false)
     {
         QVBoxLayout *layout = new QVBoxLayout;
-        layout->setMargin(0);
+        layout->setContentsMargins(QMargins());
         QFrame *line = new QFrame(this);
         line->setFrameShape(QFrame::HLine);
         line->setFrameShadow(QFrame::Sunken);
@@ -209,6 +209,7 @@ public:
     void setupLayout();
     void _q_buttonClicked(QAbstractButton *);
     void _q_clicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role);
+    void setClickedButton(QAbstractButton *button);
 
     QAbstractButton *findButton(int button0, int button1, int button2, int flags);
     void addOldButtons(int button0, int button1, int button2);
@@ -216,6 +217,8 @@ public:
     QAbstractButton *abstractButtonForId(int id) const;
     int execReturnCode(QAbstractButton *button);
 
+    int dialogCodeForButton(QAbstractButton *button) const;
+
     void detectEscapeButton();
     void updateSize();
     int layoutMinimumWidth();
@@ -466,6 +469,27 @@ int QMessageBoxPrivate::execReturnCode(QAbstractButton *button)
     return ret;
 }
 
+/*!
+    \internal
+
+    Returns 0 for RejectedRole and NoRole, 1 for AcceptedRole and YesRole, -1 otherwise
+ */
+int QMessageBoxPrivate::dialogCodeForButton(QAbstractButton *button) const
+{
+    Q_Q(const QMessageBox);
+
+    switch (q->buttonRole(button)) {
+    case QMessageBox::AcceptRole:
+    case QMessageBox::YesRole:
+        return QDialog::Accepted;
+    case QMessageBox::RejectRole:
+    case QMessageBox::NoRole:
+        return QDialog::Rejected;
+    default:
+        return -1;
+    }
+}
+
 void QMessageBoxPrivate::_q_buttonClicked(QAbstractButton *button)
 {
     Q_Q(QMessageBox);
@@ -477,20 +501,30 @@ void QMessageBoxPrivate::_q_buttonClicked(QAbstractButton *button)
     } else
 #endif
     {
-        clickedButton = button;
-        q->done(execReturnCode(button)); // does not trigger closeEvent
-        emit q->buttonClicked(button);
+        setClickedButton(button);
 
         if (receiverToDisconnectOnClose) {
             QObject::disconnect(q, signalToDisconnectOnClose, receiverToDisconnectOnClose,
                                 memberToDisconnectOnClose);
-            receiverToDisconnectOnClose = 0;
+            receiverToDisconnectOnClose = nullptr;
         }
         signalToDisconnectOnClose.clear();
         memberToDisconnectOnClose.clear();
     }
 }
 
+void QMessageBoxPrivate::setClickedButton(QAbstractButton *button)
+{
+    Q_Q(QMessageBox);
+
+    clickedButton = button;
+    emit q->buttonClicked(clickedButton);
+
+    auto resultCode = execReturnCode(button);
+    hide(resultCode);
+    finalize(resultCode, dialogCodeForButton(button));
+}
+
 void QMessageBoxPrivate::_q_clicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role)
 {
     Q_Q(QMessageBox);
@@ -800,7 +834,7 @@ QMessageBox::QMessageBox(QWidget *parent)
     The message box is an \l{Qt::ApplicationModal} {application modal}
     dialog box.
 
-    On \macos, if \a parent is not 0 and you want your message box
+    On \macos, if \a parent is not \nullptr and you want your message box
     to appear as a Qt::Sheet of that parent, set the message box's
     \l{setWindowModality()} {window modality} to Qt::WindowModal
     (default). Otherwise, the message box will be a standard dialog.
@@ -949,7 +983,7 @@ QMessageBox::StandardButton QMessageBox::standardButton(QAbstractButton *button)
     \since 4.2
 
     Returns a pointer corresponding to the standard button \a which,
-    or 0 if the standard button doesn't exist in this message box.
+    or \nullptr if the standard button doesn't exist in this message box.
 
     \sa standardButtons, standardButton()
 */
@@ -1072,7 +1106,7 @@ void QMessageBoxPrivate::detectEscapeButton()
     \since 4.2
 
     Returns the button that was clicked by the user,
-    or 0 if the user hit the \uicontrol Esc key and
+    or \nullptr if the user hit the \uicontrol Esc key and
     no \l{setEscapeButton()}{escape button} was set.
 
     If exec() hasn't been called yet, returns nullptr.
@@ -1139,7 +1173,7 @@ void QMessageBox::setDefaultButton(QMessageBox::StandardButton button)
 /*! \since 5.2
 
     Sets the checkbox \a cb on the message dialog. The message box takes ownership of the checkbox.
-    The argument \a cb can be 0 to remove an existing checkbox from the message box.
+    The argument \a cb can be \nullptr to remove an existing checkbox from the message box.
 
     \sa checkBox()
 */
@@ -1171,7 +1205,7 @@ void QMessageBox::setCheckBox(QCheckBox *cb)
 
 /*! \since 5.2
 
-    Returns the checkbox shown on the dialog. This is 0 if no checkbox is set.
+    Returns the checkbox shown on the dialog. This is \nullptr if no checkbox is set.
     \sa setCheckBox()
 */
 
@@ -1536,7 +1570,7 @@ QList<QAbstractButton *> QMessageBox::buttons() const
     \since 4.5
 
     Returns the button role for the specified \a button. This function returns
-    \l InvalidRole if \a button is 0 or has not been added to the message box.
+    \l InvalidRole if \a button is \nullptr or has not been added to the message box.
 
     \sa buttons(), addButton()
 */
@@ -1801,7 +1835,7 @@ void QMessageBox::about(QWidget *parent, const QString &title, const QString &te
 
 /*!
     Displays a simple message box about Qt, with the given \a title
-    and centered over \a parent (if \a parent is not 0). The message
+    and centered over \a parent (if \a parent is not \nullptr). The message
     includes the version number of Qt being used by the application.
 
     This is useful for inclusion in the \uicontrol Help menu of an application,
@@ -1832,22 +1866,23 @@ void QMessageBox::aboutQt(QWidget *parent, const QString &title)
         "<h3>About Qt</h3>"
         "<p>This program uses Qt version %1.</p>"
         ).arg(QLatin1String(QT_VERSION_STR));
-    QString translatedTextAboutQtText;
-    translatedTextAboutQtText = QMessageBox::tr(
+    //: 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(
         "<p>Qt is a C++ toolkit for cross-platform application "
         "development.</p>"
         "<p>Qt provides single-source portability across all major desktop "
         "operating systems. It is also available for embedded Linux and other "
         "embedded and mobile operating systems.</p>"
-        "<p>Qt is available under three different licensing options designed "
+        "<p>Qt is available under multiple licensing options designed "
         "to accommodate the needs of our various users.</p>"
         "<p>Qt licensed under our commercial license agreement is appropriate "
         "for development of proprietary/commercial software where you do not "
         "want to share any source code with third parties or otherwise cannot "
-        "comply with the terms of the GNU LGPL version 3.</p>"
-        "<p>Qt licensed under the GNU LGPL version 3 is appropriate for the "
+        "comply with the terms of GNU (L)GPL.</p>"
+        "<p>Qt licensed under GNU (L)GPL is appropriate for the "
         "development of Qt&nbsp;applications provided you can comply with the terms "
-        "and conditions of the GNU LGPL version 3.</p>"
+        "and conditions of the respective licenses.</p>"
         "<p>Please see <a href=\"http://%2/\">%2</a> "
         "for an overview of Qt licensing.</p>"
         "<p>Copyright (C) %1 The Qt Company Ltd and other "
@@ -1855,7 +1890,7 @@ void QMessageBox::aboutQt(QWidget *parent, const QString &title)
         "<p>Qt and the Qt logo are trademarks of The Qt Company Ltd.</p>"
         "<p>Qt is The Qt Company Ltd product developed as an open source "
         "project. See <a href=\"http://%3/\">%3</a> for more information.</p>"
-        ).arg(QStringLiteral("2018"),
+        ).arg(QStringLiteral("2019"),
               QStringLiteral("qt.io/licensing"),
               QStringLiteral("qt.io"));
     QMessageBox *msgBox = new QMessageBox(parent);
diff --git a/src/widgets/dialogs/qmessagebox.h b/src/widgets/dialogs/qmessagebox.h
index 4b993a9e65..0a2edb1eee 100644
--- a/src/widgets/dialogs/qmessagebox.h
+++ b/src/widgets/dialogs/qmessagebox.h
@@ -284,9 +284,9 @@ public:
 Q_SIGNALS:
     void buttonClicked(QAbstractButton *button);
 
-#ifdef Q_QDOC
+#ifdef Q_CLANG_QDOC
 public Q_SLOTS:
-    int exec();
+    int exec() override;
 #endif
 
 protected:
diff --git a/src/widgets/dialogs/qprogressdialog.cpp b/src/widgets/dialogs/qprogressdialog.cpp
index 4bf78e2115..078dd6463b 100644
--- a/src/widgets/dialogs/qprogressdialog.cpp
+++ b/src/widgets/dialogs/qprogressdialog.cpp
@@ -47,7 +47,6 @@
 #include "qapplication.h"
 #include "qstyle.h"
 #include "qpushbutton.h"
-#include "qcursor.h"
 #include "qtimer.h"
 #include "qelapsedtimer.h"
 #include <private/qdialog_p.h>
@@ -94,9 +93,6 @@ public:
     bool cancellation_flag;
     bool setValue_called;
     QElapsedTimer starttime;
-#ifndef QT_NO_CURSOR
-    QCursor parentCursor;
-#endif
     int showTime;
     bool autoClose;
     bool autoReset;
@@ -397,7 +393,7 @@ void QProgressDialog::setLabelText(const QString &text)
   Sets the cancel button to the push button, \a cancelButton. The
   progress dialog takes ownership of this button which will be deleted
   when necessary, so do not pass the address of an object that is on
-  the stack, i.e. use new() to create the button.  If 0 is passed then
+  the stack, i.e. use new() to create the button.  If \nullptr is passed,
   no cancel button will be shown.
 
   \sa setCancelButtonText()
@@ -597,12 +593,6 @@ void QProgressDialog::setRange(int minimum, int maximum)
 void QProgressDialog::reset()
 {
     Q_D(QProgressDialog);
-#ifndef QT_NO_CURSOR
-    if (value() >= 0) {
-        if (parentWidget())
-            parentWidget()->setCursor(d->parentCursor);
-    }
-#endif
     if (d->autoClose || d->forceHide)
         hide();
     d->bar->reset();
diff --git a/src/widgets/dialogs/qsidebar_p.h b/src/widgets/dialogs/qsidebar_p.h
index 4a82f88878..6056f19452 100644
--- a/src/widgets/dialogs/qsidebar_p.h
+++ b/src/widgets/dialogs/qsidebar_p.h
@@ -67,7 +67,7 @@ class QFileSystemModel;
 class QSideBarDelegate : public QStyledItemDelegate
 {
  public:
-     QSideBarDelegate(QWidget *parent = 0) : QStyledItemDelegate(parent) {}
+     QSideBarDelegate(QWidget *parent = nullptr) : QStyledItemDelegate(parent) {}
      void initStyleOption(QStyleOptionViewItem *option,
                           const QModelIndex &index) const override;
 };
@@ -82,7 +82,7 @@ public:
         EnabledRole = Qt::UserRole + 2
     };
 
-    QUrlModel(QObject *parent = 0);
+    QUrlModel(QObject *parent = nullptr);
 
     QStringList mimeTypes() const override;
     QMimeData *mimeData(const QModelIndexList &indexes) const override;
@@ -127,7 +127,7 @@ Q_SIGNALS:
     void goToUrl(const QUrl &url);
 
 public:
-    QSidebar(QWidget *parent = 0);
+    QSidebar(QWidget *parent = nullptr);
     void setModelAndUrls(QFileSystemModel *model, const QList<QUrl> &newUrls);
     ~QSidebar();
 
diff --git a/src/widgets/dialogs/qwizard.cpp b/src/widgets/dialogs/qwizard.cpp
index 3876cf16c6..f428114bbe 100644
--- a/src/widgets/dialogs/qwizard.cpp
+++ b/src/widgets/dialogs/qwizard.cpp
@@ -331,7 +331,7 @@ QWizardHeader::QWizardHeader(QWidget *parent)
     titleLabel->setFont(font);
 
     layout = new QGridLayout(this);
-    layout->setMargin(0);
+    layout->setContentsMargins(QMargins());
     layout->setSpacing(0);
 
     layout->setRowMinimumHeight(3, 1);
@@ -456,7 +456,7 @@ public:
 
     QSize minimumSizeHint() const override {
         if (pixmap() && !pixmap()->isNull())
-            return pixmap()->size();
+            return pixmap()->size() / pixmap()->devicePixelRatio();
         return QFrame::minimumSizeHint();
     }
 
@@ -769,7 +769,7 @@ void QWizardPrivate::reset()
         for (int i = history.count() - 1; i >= 0; --i)
             q->cleanupPage(history.at(i));
         history.clear();
-        for (QWizardPage *page : pageMap)
+        for (QWizardPage *page : qAsConst(pageMap))
             page->d_func()->initialized = false;
 
         current = -1;
@@ -1032,13 +1032,13 @@ void QWizardPrivate::recreateLayout(const QWizardLayoutInfo &info)
     int pageColumn = qMin(1, numColumns - 1);
 
     if (mac) {
-        mainLayout->setMargin(0);
+        mainLayout->setContentsMargins(QMargins());
         mainLayout->setSpacing(0);
         buttonLayout->setContentsMargins(MacLayoutLeftMargin, MacButtonTopMargin, MacLayoutRightMargin, MacLayoutBottomMargin);
-        pageVBoxLayout->setMargin(7);
+        pageVBoxLayout->setContentsMargins(7, 7, 7, 7);
     } else {
         if (modern) {
-            mainLayout->setMargin(0);
+            mainLayout->setContentsMargins(QMargins());
             mainLayout->setSpacing(0);
             pageVBoxLayout->setContentsMargins(deltaMarginLeft, deltaMarginTop,
                                                deltaMarginRight, deltaMarginBottom);
@@ -1595,23 +1595,25 @@ bool QWizardPrivate::handleAeroStyleChange()
     bool vistaMargins = false;
 
     if (isVistaThemeEnabled()) {
+        const int topOffset = vistaHelper->topOffset();
+        const int topPadding = vistaHelper->topPadding();
         if (isVistaThemeEnabled(QVistaHelper::VistaAero)) {
             if (isWindow) {
                 vistaHelper->setDWMTitleBar(QVistaHelper::ExtendedTitleBar);
                 q->installEventFilter(vistaHelper);
             }
             q->setMouseTracking(true);
-            antiFlickerWidget->move(0, vistaHelper->titleBarSize() + vistaHelper->topOffset());
+            antiFlickerWidget->move(0, vistaHelper->titleBarSize() + topOffset);
             vistaHelper->backButton()->move(
-                0, vistaHelper->topOffset() // ### should ideally work without the '+ 1'
-                - qMin(vistaHelper->topOffset(), vistaHelper->topPadding() + 1));
+                0, topOffset // ### should ideally work without the '+ 1'
+                - qMin(topOffset, topPadding + 1));
             vistaMargins = true;
             vistaHelper->backButton()->show();
         } else {
             if (isWindow)
                 vistaHelper->setDWMTitleBar(QVistaHelper::NormalTitleBar);
             q->setMouseTracking(true);
-            antiFlickerWidget->move(0, vistaHelper->topOffset());
+            antiFlickerWidget->move(0, topOffset);
             vistaHelper->backButton()->move(0, -1); // ### should ideally work with (0, 0)
         }
         if (isWindow)
@@ -2374,8 +2376,8 @@ void QWizard::removePage(int id)
 /*!
     \fn QWizardPage *QWizard::page(int id) const
 
-    Returns the page with the given \a id, or 0 if there is no such
-    page.
+    Returns the page with the given \a id, or \nullptr if there is no
+    such page.
 
     \sa addPage(), setPage()
 */
@@ -2462,8 +2464,8 @@ int QWizard::startId() const
 }
 
 /*!
-    Returns a pointer to the current page, or 0 if there is no current
-    page (e.g., before the wizard is shown).
+    Returns a pointer to the current page, or \nullptr if there is no
+    current page (e.g., before the wizard is shown).
 
     This is equivalent to calling page(currentId()).
 
@@ -2954,7 +2956,7 @@ void QWizard::setDefaultProperty(const char *className, const char *property,
 
     Passing 0 shows no side widget.
 
-    When the \a widget is not 0 the wizard reparents it.
+    When the \a widget is not \nullptr the wizard reparents it.
 
     Any previous side widget is hidden.
 
@@ -2963,7 +2965,7 @@ void QWizard::setDefaultProperty(const char *className, const char *property,
 
     All widgets set here will be deleted by the wizard when it is
     destroyed unless you separately reparent the widget after setting
-    some other side widget (or 0).
+    some other side widget (or \nullptr).
 
     By default, no side widget is present.
 */
@@ -2981,7 +2983,7 @@ void QWizard::setSideWidget(QWidget *widget)
 /*!
     \since 4.7
 
-    Returns the widget on the left side of the wizard or 0.
+    Returns the widget on the left side of the wizard or \nullptr.
 
     By default, no side widget is present.
 */
@@ -3257,7 +3259,11 @@ void QWizard::paintEvent(QPaintEvent * event)
 /*!
     \reimp
 */
+#  if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+bool QWizard::nativeEvent(const QByteArray &eventType, void *message, qintptr *result)
+#  else
 bool QWizard::nativeEvent(const QByteArray &eventType, void *message, long *result)
+#  endif
 {
 #if QT_CONFIG(style_windowsvista)
     Q_D(QWizard);
@@ -3969,7 +3975,7 @@ void QWizardPage::registerField(const QString &name, QWidget *widget, const char
 }
 
 /*!
-    Returns the wizard associated with this page, or 0 if this page
+    Returns the wizard associated with this page, or \nullptr if this page
     hasn't been inserted into a QWizard yet.
 
     \sa QWizard::addPage(), QWizard::setPage()
diff --git a/src/widgets/dialogs/qwizard.h b/src/widgets/dialogs/qwizard.h
index 0dd837b197..ef71efa0cb 100644
--- a/src/widgets/dialogs/qwizard.h
+++ b/src/widgets/dialogs/qwizard.h
@@ -188,7 +188,11 @@ protected:
     void resizeEvent(QResizeEvent *event) override;
     void paintEvent(QPaintEvent *event) override;
 #if defined(Q_OS_WIN) || defined(Q_CLANG_QDOC)
+#  if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    bool nativeEvent(const QByteArray &eventType, void *message, qintptr *result) override;
+#  else
     bool nativeEvent(const QByteArray &eventType, void *message, long *result) override;
+#  endif
 #endif
     void done(int result) override;
     virtual void initializePage(int id);
diff --git a/src/widgets/dialogs/qwizard_win.cpp b/src/widgets/dialogs/qwizard_win.cpp
index aa9ad7f290..95f8f6a878 100644
--- a/src/widgets/dialogs/qwizard_win.cpp
+++ b/src/widgets/dialogs/qwizard_win.cpp
@@ -172,7 +172,7 @@ void QVistaHelper::updateCustomMargins(bool vistaMargins)
         const QMargins customMarginsDp = vistaMargins
             ? QMargins(0, -titleBarSizeDp(), 0, 0)
             : QMargins();
-        const QVariant customMarginsV = qVariantFromValue(customMarginsDp);
+        const QVariant customMarginsV = QVariant::fromValue(customMarginsDp);
         // The dynamic property takes effect when creating the platform window.
         window->setProperty("_q_windowsCustomMargins", customMarginsV);
         // If a platform window exists, change via native interface.
@@ -293,9 +293,9 @@ void QVistaHelper::drawTitleBar(QPainter *painter)
     int glowOffset = 0;
 
     if (vistaState() == VistaAero) {
-        textHeight += 2 * glowSize();
-        textWidth += 2 * glowSize();
         glowOffset = glowSize();
+        textHeight += 2 * glowOffset;
+        textWidth += 2 * glowOffset;
     }
 
     const int titleLeft = (wizard->layoutDirection() == Qt::LeftToRight
@@ -339,7 +339,11 @@ void QVistaHelper::setTitleBarIconAndCaptionVisible(bool visible)
         SetWindowThemeAttribute(handle, WTA_NONCLIENT, &opt, sizeof(WTA_OPTIONS));
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+bool QVistaHelper::winEvent(MSG* msg, qintptr *result)
+#else
 bool QVistaHelper::winEvent(MSG* msg, long* result)
+#endif
 {
     switch (msg->message) {
     case WM_NCHITTEST: {
@@ -401,7 +405,11 @@ void QVistaHelper::mouseEvent(QEvent *event)
     }
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+bool QVistaHelper::handleWinEvent(MSG *message, qintptr *result)
+#else
 bool QVistaHelper::handleWinEvent(MSG *message, long *result)
+#endif
 {
     if (message->message == WM_THEMECHANGED || message->message == WM_DWMCOMPOSITIONCHANGED)
         cachedVistaState = Dirty;
@@ -509,7 +517,11 @@ bool QVistaHelper::eventFilter(QObject *obj, QEvent *event)
 
     if (event->type() == QEvent::MouseMove) {
         QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+        qintptr result;
+#else
         long result;
+#endif
         MSG msg;
         msg.message = WM_NCHITTEST;
         msg.wParam  = 0;
@@ -523,7 +535,11 @@ bool QVistaHelper::eventFilter(QObject *obj, QEvent *event)
         QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
 
         if (mouseEvent->button() == Qt::LeftButton) {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            qintptr result;
+#else
             long result;
+#endif
             MSG msg;
             msg.message = WM_NCHITTEST;
             msg.wParam  = 0;
@@ -538,7 +554,11 @@ bool QVistaHelper::eventFilter(QObject *obj, QEvent *event)
         QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
 
         if (mouseEvent->button() == Qt::LeftButton) {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            qintptr result;
+#else
             long result;
+#endif
             MSG msg;
             msg.message = WM_NCHITTEST;
             msg.wParam  = 0;
diff --git a/src/widgets/dialogs/qwizard_win_p.h b/src/widgets/dialogs/qwizard_win_p.h
index d302dedaa3..b3796e3f48 100644
--- a/src/widgets/dialogs/qwizard_win_p.h
+++ b/src/widgets/dialogs/qwizard_win_p.h
@@ -84,7 +84,7 @@ class QWizard;
 
 class QVistaHelper : public QObject
 {
-    Q_DISABLE_COPY(QVistaHelper)
+    Q_DISABLE_COPY_MOVE(QVistaHelper)
 public:
     QVistaHelper(QWizard *wizard);
     ~QVistaHelper() override;
@@ -93,7 +93,11 @@ public:
     bool setDWMTitleBar(TitleBarChangeType type);
     void setTitleBarIconAndCaptionVisible(bool visible);
     void mouseEvent(QEvent *event);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    bool handleWinEvent(MSG *message, qintptr *result);
+#else
     bool handleWinEvent(MSG *message, long *result);
+#endif
     void resizeEvent(QResizeEvent *event);
     void paintEvent(QPaintEvent *event);
     QVistaBackButton *backButton() const { return backButton_; }
@@ -130,7 +134,11 @@ private:
     void drawTitleBar(QPainter *painter);
     void setMouseCursor(QPoint pos);
     void collapseTopFrameStrut();
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    bool winEvent(MSG *message, qintptr *result);
+#else
     bool winEvent(MSG *message, long *result);
+#endif
     void mouseMoveEvent(QMouseEvent *event);
     void mousePressEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);