Merge remote-tracking branch 'origin/dev' into wip/qt6

Change-Id: Iac12a37fa6536ebe30e6548f7c54ec0c402c9f5d

13 files changed, 186 insertions, 150 deletions

diff --git a/src/gui/kernel/qevent.cpp b/src/gui/kernel/qevent.cpp
index 563eab4655..2f3a02f4d6 100644
--- a/src/gui/kernel/qevent.cpp
+++ b/src/gui/kernel/qevent.cpp
@@ -5320,7 +5320,7 @@ QScrollEvent::ScrollState QScrollEvent::scrollState() const
 
 /*!
     Creates a new QScreenOrientationChangeEvent
-    \a orientation is the new orientation of the screen.
+    \a screenOrientation is the new orientation of the \a screen.
 */
 QScreenOrientationChangeEvent::QScreenOrientationChangeEvent(QScreen *screen, Qt::ScreenOrientation screenOrientation)
     : QEvent(QEvent::OrientationChange), m_screen(screen), m_orientation(screenOrientation)
diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index d2858c5270..7799be77d2 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -1306,6 +1306,58 @@ static void init_plugins(const QList<QByteArray> &pluginList)
     }
 }
 
+void QGuiApplicationPrivate::addQtOptions(QList<QCommandLineOption> *options)
+{
+    QCoreApplicationPrivate::addQtOptions(options);
+
+#if defined(Q_OS_UNIX) && !defined(Q_OS_DARWIN)
+    const QByteArray sessionType = qgetenv("XDG_SESSION_TYPE");
+    const bool x11 = sessionType == "x11";
+    // Technically the x11 aliases are only available if platformName is "xcb", but we can't know that here.
+#else
+    const bool x11 = false;
+#endif
+
+    options->append(QCommandLineOption(QStringLiteral("platform"),
+                    QGuiApplication::tr("QPA plugin. See QGuiApplication documentation for available options for each plugin."), QStringLiteral("platformName[:options]")));
+    options->append(QCommandLineOption(QStringLiteral("platformpluginpath"),
+                    QGuiApplication::tr("Path to the platform plugins."), QStringLiteral("path")));
+    options->append(QCommandLineOption(QStringLiteral("platformtheme"),
+                    QGuiApplication::tr("Platform theme."), QStringLiteral("theme")));
+    options->append(QCommandLineOption(QStringLiteral("plugin"),
+                    QGuiApplication::tr("Additional plugins to load, can be specified multiple times."), QStringLiteral("plugin")));
+    options->append(QCommandLineOption(QStringLiteral("qwindowgeometry"),
+                    QGuiApplication::tr("Window geometry for the main window, using the X11-syntax, like 100x100+50+50."), QStringLiteral("geometry")));
+    options->append(QCommandLineOption(QStringLiteral("qwindowicon"),
+                    QGuiApplication::tr("Default window icon."), QStringLiteral("icon")));
+    options->append(QCommandLineOption(QStringLiteral("qwindowtitle"),
+                    QGuiApplication::tr("Title of the first window."), QStringLiteral("title")));
+    options->append(QCommandLineOption(QStringLiteral("reverse"),
+                    QGuiApplication::tr("Sets the application's layout direction to Qt::RightToLeft (debugging helper).")));
+    options->append(QCommandLineOption(QStringLiteral("session"),
+                    QGuiApplication::tr("Restores the application from an earlier session."), QStringLiteral("session")));
+
+    if (x11) {
+         options->append(QCommandLineOption(QStringLiteral("display"),
+                         QGuiApplication::tr("Display name, overrides $DISPLAY."), QStringLiteral("display")));
+         options->append(QCommandLineOption(QStringLiteral("name"),
+                         QGuiApplication::tr("Instance name according to ICCCM 4.1.2.5."), QStringLiteral("name")));
+         options->append(QCommandLineOption(QStringLiteral("nograb"),
+                         QGuiApplication::tr("Disable mouse grabbing (useful in debuggers).")));
+         options->append(QCommandLineOption(QStringLiteral("dograb"),
+                         QGuiApplication::tr("Force mouse grabbing (even when running in a debugger).")));
+         options->append(QCommandLineOption(QStringLiteral("visual"),
+                         QGuiApplication::tr("ID of the X11 Visual to use."), QStringLiteral("id")));
+         // Not using the "QStringList names" solution for those aliases, because it makes the first column too wide
+         options->append(QCommandLineOption(QStringLiteral("geometry"),
+                         QGuiApplication::tr("Alias for --windowgeometry."), QStringLiteral("geometry")));
+         options->append(QCommandLineOption(QStringLiteral("icon"),
+                         QGuiApplication::tr("Alias for --windowicon."), QStringLiteral("icon")));
+         options->append(QCommandLineOption(QStringLiteral("title"),
+                         QGuiApplication::tr("Alias for --windowtitle."), QStringLiteral("title")));
+    }
+}
+
 void QGuiApplicationPrivate::createPlatformIntegration()
 {
     QHighDpiScaling::initHighDpiScaling();
diff --git a/src/gui/kernel/qguiapplication_p.h b/src/gui/kernel/qguiapplication_p.h
index 361519661a..6902a99eca 100644
--- a/src/gui/kernel/qguiapplication_p.h
+++ b/src/gui/kernel/qguiapplication_p.h
@@ -92,6 +92,7 @@ public:
     virtual void notifyLayoutDirectionChange();
     virtual void notifyActiveWindowChange(QWindow *previous);
 
+    void addQtOptions(QList<QCommandLineOption> *options) override;
     virtual bool shouldQuit() override;
 
     bool shouldQuitInternal(const QWindowList &processedWindows);
diff --git a/src/gui/kernel/qhighdpiscaling.cpp b/src/gui/kernel/qhighdpiscaling.cpp
index 22e46e0851..4f8e9a3817 100644
--- a/src/gui/kernel/qhighdpiscaling.cpp
+++ b/src/gui/kernel/qhighdpiscaling.cpp
@@ -41,7 +41,9 @@
 #include "qguiapplication.h"
 #include "qscreen.h"
 #include "qplatformintegration.h"
+#include "qplatformwindow.h"
 #include "private/qscreen_p.h"
+#include <private/qguiapplication_p.h>
 
 #include <QtCore/qdebug.h>
 
@@ -376,6 +378,46 @@ QPoint QHighDpiScaling::mapPositionFromNative(const QPoint &pos, const QPlatform
     return (pos - topLeft) / scaleFactor + topLeft;
 }
 
+QPoint QHighDpiScaling::mapPositionToGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window)
+{
+    QPoint globalPosCandidate = pos + windowGlobalPosition;
+    if (QGuiApplicationPrivate::screen_list.size() <= 1)
+        return globalPosCandidate;
+
+    // The global position may be outside device independent screen geometry
+    // in cases where a window spans screens. Detect this case and map via
+    // native coordinates to the correct screen.
+    auto currentScreen = window->screen();
+    if (currentScreen && !currentScreen->geometry().contains(globalPosCandidate)) {
+        auto nativeGlobalPos = QHighDpi::toNativePixels(globalPosCandidate, currentScreen);
+        if (auto actualPlatformScreen = currentScreen->handle()->screenForPosition(nativeGlobalPos))
+            return QHighDpi::fromNativePixels(nativeGlobalPos, actualPlatformScreen->screen());
+    }
+
+    return globalPosCandidate;
+}
+
+QPoint QHighDpiScaling::mapPositionFromGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window)
+{
+    QPoint windowPosCandidate = pos - windowGlobalPosition;
+    if (QGuiApplicationPrivate::screen_list.size() <= 1)
+        return windowPosCandidate;
+
+    // Device independent global (screen) space may discontiguous when high-dpi scaling
+    // is active. This means that the normal subtracting of the window global position from the
+    // position-to-be-mapped may not work in cases where a window spans multiple screens.
+    // Map both positions to native global space (using the correct screens), subtract there,
+    // and then map the difference back using the scale factor for the window.
+    QScreen *posScreen = QGuiApplication::screenAt(pos);
+    if (posScreen && posScreen != window->screen()) {
+        QPoint nativePos = QHighDpi::toNativePixels(pos, posScreen);
+        QPoint windowNativePos = window->handle()->geometry().topLeft();
+        return QHighDpi::fromNativeLocalPosition(nativePos - windowNativePos, window);
+    }
+
+    return windowPosCandidate;
+}
+
 qreal QHighDpiScaling::screenSubfactor(const QPlatformScreen *screen)
 {
     qreal factor = qreal(1.0);
@@ -450,5 +492,13 @@ QPoint QHighDpiScaling::origin(const QPlatformScreen *platformScreen)
     return platformScreen->geometry().topLeft();
 }
 
+QPoint QHighDpiScaling::origin(const QWindow *window)
+{
+    if (window && window->isTopLevel() && window->screen())
+        return window->screen()->geometry().topLeft();
+
+    return QPoint(0, 0);
+}
+
 #endif //QT_NO_HIGHDPISCALING
 QT_END_NAMESPACE
diff --git a/src/gui/kernel/qhighdpiscaling_p.h b/src/gui/kernel/qhighdpiscaling_p.h
index 83fc9452c5..91cfbcbfc7 100644
--- a/src/gui/kernel/qhighdpiscaling_p.h
+++ b/src/gui/kernel/qhighdpiscaling_p.h
@@ -83,8 +83,11 @@ public:
     static qreal factor(const QPlatformScreen *platformScreen);
     static QPoint origin(const QScreen *screen);
     static QPoint origin(const QPlatformScreen *platformScreen);
-    static QPoint mapPositionFromNative(const QPoint &pos, const QPlatformScreen *platformScreen);
+    static QPoint origin(const QWindow *window);
     static QPoint mapPositionToNative(const QPoint &pos, const QPlatformScreen *platformScreen);
+    static QPoint mapPositionFromNative(const QPoint &pos, const QPlatformScreen *platformScreen);
+    static QPoint mapPositionToGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window);
+    static QPoint mapPositionFromGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window);
     static QDpi logicalDpi();
 
 private:
@@ -201,94 +204,42 @@ inline QPointF toNativeLocalPosition(const QPointF &pos, const QWindow *window)
     return pos * scaleFactor;
 }
 
-inline QRect fromNativePixels(const QRect &pixelRect, const QPlatformScreen *platformScreen)
+template <typename C>
+inline QRect fromNativePixels(const QRect &pixelRect, const C *context)
 {
-    const qreal scaleFactor = QHighDpiScaling::factor(platformScreen);
-    const QPoint origin = QHighDpiScaling::origin(platformScreen);
+    const qreal scaleFactor = QHighDpiScaling::factor(context);
+    const QPoint origin = QHighDpiScaling::origin(context);
     return QRect(fromNative(pixelRect.topLeft(), scaleFactor, origin),
                  fromNative(pixelRect.size(), scaleFactor));
 }
 
-inline QRect toNativePixels(const QRect &pointRect, const QPlatformScreen *platformScreen)
+template <typename C>
+inline QRect toNativePixels(const QRect &pointRect, const C *context)
 {
-    const qreal scaleFactor = QHighDpiScaling::factor(platformScreen);
-    const QPoint origin = QHighDpiScaling::origin(platformScreen);
+    const qreal scaleFactor = QHighDpiScaling::factor(context);
+    const QPoint origin = QHighDpiScaling::origin(context);
     return QRect(toNative(pointRect.topLeft(), scaleFactor, origin),
                  toNative(pointRect.size(), scaleFactor));
 }
 
-inline QRect fromNativePixels(const QRect &pixelRect, const QScreen *screen)
-{
-    const qreal scaleFactor = QHighDpiScaling::factor(screen);
-    const QPoint origin = QHighDpiScaling::origin(screen);
-    return QRect(fromNative(pixelRect.topLeft(), scaleFactor, origin),
-                 fromNative(pixelRect.size(), scaleFactor));
-}
-
-inline QRect toNativePixels(const QRect &pointRect, const QScreen *screen)
-{
-    const qreal scaleFactor = QHighDpiScaling::factor(screen);
-    const QPoint origin = QHighDpiScaling::origin(screen);
-    return QRect(toNative(pointRect.topLeft(), scaleFactor, origin),
-                 toNative(pointRect.size(), scaleFactor));
-}
-
-inline QRect fromNativePixels(const QRect &pixelRect, const QWindow *window)
-{
-    if (window && window->isTopLevel() && window->screen()) {
-        return fromNativePixels(pixelRect, window->screen());
-    } else {
-        const qreal scaleFactor = QHighDpiScaling::factor(window);
-        return QRect(pixelRect.topLeft() / scaleFactor, fromNative(pixelRect.size(), scaleFactor));
-    }
-}
-
-inline QRectF toNativePixels(const QRectF &pointRect, const QScreen *screen)
+template <typename C>
+inline QRectF toNativePixels(const QRectF &pointRect, const C *context)
 {
-    const qreal scaleFactor = QHighDpiScaling::factor(screen);
-    const QPoint origin = QHighDpiScaling::origin(screen);
+    const qreal scaleFactor = QHighDpiScaling::factor(context);
+    const QPoint origin = QHighDpiScaling::origin(context);
     return QRectF(toNative(pointRect.topLeft(), scaleFactor, origin),
-                 toNative(pointRect.size(), scaleFactor));
-}
-
-inline QRect toNativePixels(const QRect &pointRect, const QWindow *window)
-{
-    if (window && window->isTopLevel() && window->screen()) {
-        return toNativePixels(pointRect, window->screen());
-    } else {
-        const qreal scaleFactor = QHighDpiScaling::factor(window);
-        return QRect(pointRect.topLeft() * scaleFactor, toNative(pointRect.size(), scaleFactor));
-    }
+                  toNative(pointRect.size(), scaleFactor));
 }
 
-inline QRectF fromNativePixels(const QRectF &pixelRect, const QScreen *screen)
+template <typename C>
+inline QRectF fromNativePixels(const QRectF &pixelRect, const C *context)
 {
-    const qreal scaleFactor = QHighDpiScaling::factor(screen);
-    const QPoint origin = QHighDpiScaling::origin(screen);
+    const qreal scaleFactor = QHighDpiScaling::factor(context);
+    const QPoint origin = QHighDpiScaling::origin(context);
     return QRectF(fromNative(pixelRect.topLeft(), scaleFactor, origin),
                  fromNative(pixelRect.size(), scaleFactor));
 }
 
-inline QRectF fromNativePixels(const QRectF &pixelRect, const QWindow *window)
-{
-    if (window && window->isTopLevel() && window->screen()) {
-        return fromNativePixels(pixelRect, window->screen());
-    } else {
-        const qreal scaleFactor = QHighDpiScaling::factor(window);
-        return QRectF(pixelRect.topLeft() / scaleFactor, pixelRect.size() / scaleFactor);
-    }
-}
-
-inline QRectF toNativePixels(const QRectF &pointRect, const QWindow *window)
-{
-    if (window && window->isTopLevel() && window->screen()) {
-        return toNativePixels(pointRect, window->screen());
-    } else {
-        const qreal scaleFactor = QHighDpiScaling::factor(window);
-        return QRectF(pointRect.topLeft() * scaleFactor, pointRect.size() * scaleFactor);
-    }
-}
-
 inline QSize fromNativePixels(const QSize &pixelSize, const QWindow *window)
 {
     return pixelSize / QHighDpiScaling::factor(window);
@@ -309,56 +260,28 @@ inline QSizeF toNativePixels(const QSizeF &pointSize, const QWindow *window)
     return pointSize * QHighDpiScaling::factor(window);
 }
 
-inline QPoint fromNativePixels(const QPoint &pixelPoint, const QScreen *screen)
+template <typename C>
+inline QPoint fromNativePixels(const QPoint &pixelPoint, const C *context)
 {
-    return fromNative(pixelPoint, QHighDpiScaling::factor(screen), QHighDpiScaling::origin(screen));
+    return fromNative(pixelPoint, QHighDpiScaling::factor(context), QHighDpiScaling::origin(context));
 }
 
-inline QPoint fromNativePixels(const QPoint &pixelPoint, const QWindow *window)
+template <typename C>
+inline QPoint toNativePixels(const QPoint &pointPoint, const C *context)
 {
-    if (window && window->isTopLevel() && window->screen())
-        return fromNativePixels(pixelPoint, window->screen());
-    else
-        return pixelPoint / QHighDpiScaling::factor(window);
+    return toNative(pointPoint, QHighDpiScaling::factor(context), QHighDpiScaling::origin(context));
 }
 
-inline QPoint toNativePixels(const QPoint &pointPoint, const QScreen *screen)
+template <typename C>
+inline QPointF fromNativePixels(const QPointF &pixelPoint, const C *context)
 {
-    return toNative(pointPoint, QHighDpiScaling::factor(screen), QHighDpiScaling::origin(screen));
+    return fromNative(pixelPoint, QHighDpiScaling::factor(context), QHighDpiScaling::origin(context));
 }
 
-inline QPoint toNativePixels(const QPoint &pointPoint, const QWindow *window)
+template <typename C>
+inline QPointF toNativePixels(const QPointF &pointPoint, const C *context)
 {
-    if (window && window->isTopLevel() && window->screen())
-        return toNativePixels(pointPoint, window->screen());
-    else
-        return pointPoint * QHighDpiScaling::factor(window);
-}
-
-inline QPointF fromNativePixels(const QPointF &pixelPoint, const QScreen *screen)
-{
-    return fromNative(pixelPoint, QHighDpiScaling::factor(screen), QHighDpiScaling::origin(screen));
-}
-
-inline QPointF fromNativePixels(const QPointF &pixelPoint, const QWindow *window)
-{
-    if (window && window->isTopLevel() && window->screen())
-        return fromNativePixels(pixelPoint, window->screen());
-    else
-        return pixelPoint / QHighDpiScaling::factor(window);
-}
-
-inline QPointF toNativePixels(const QPointF &pointPoint, const QScreen *screen)
-{
-    return toNative(pointPoint, QHighDpiScaling::factor(screen), QHighDpiScaling::origin(screen));
-}
-
-inline QPointF toNativePixels(const QPointF &pointPoint, const QWindow *window)
-{
-     if (window && window->isTopLevel() && window->screen())
-        return toNativePixels(pointPoint, window->screen());
-    else
-        return pointPoint * QHighDpiScaling::factor(window);
+    return toNative(pointPoint, QHighDpiScaling::factor(context), QHighDpiScaling::origin(context));
 }
 
 inline QMargins fromNativePixels(const QMargins &pixelMargins, const QWindow *window)
@@ -423,47 +346,26 @@ inline QRegion toNativeLocalRegion(const QRegion &pointRegion, const QWindow *wi
 }
 
 // Any T that has operator/()
-template <typename T>
-T fromNativePixels(const T &pixelValue, const QWindow *window)
+template <typename T, typename C>
+T fromNativePixels(const T &pixelValue, const C *context)
 {
     if (!QHighDpiScaling::isActive())
         return pixelValue;
 
-    return pixelValue / QHighDpiScaling::factor(window);
-
-}
-
-    //##### ?????
-template <typename T>
-T fromNativePixels(const T &pixelValue, const QScreen *screen)
-{
-    if (!QHighDpiScaling::isActive())
-        return pixelValue;
-
-    return pixelValue / QHighDpiScaling::factor(screen);
+    return pixelValue / QHighDpiScaling::factor(context);
 
 }
 
 // Any T that has operator*()
-template <typename T>
-T toNativePixels(const T &pointValue, const QWindow *window)
-{
-    if (!QHighDpiScaling::isActive())
-        return pointValue;
-
-    return pointValue * QHighDpiScaling::factor(window);
-}
-
-template <typename T>
-T toNativePixels(const T &pointValue, const QScreen *screen)
+template <typename T, typename C>
+T toNativePixels(const T &pointValue, const C *context)
 {
     if (!QHighDpiScaling::isActive())
         return pointValue;
 
-    return pointValue * QHighDpiScaling::factor(screen);
+    return pointValue * QHighDpiScaling::factor(context);
 }
 
-
 // Any QVector<T> where T has operator/()
 template <typename T>
 QVector<T> fromNativePixels(const QVector<T> &pixelValues, const QWindow *window)
@@ -511,6 +413,8 @@ public:
     static inline QPoint origin(const QPlatformScreen *) { return QPoint(); }
     static inline QPoint mapPositionFromNative(const QPoint &pos, const QPlatformScreen *) { return pos; }
     static inline QPoint mapPositionToNative(const QPoint &pos, const QPlatformScreen *) { return pos; }
+    static inline QPoint mapPositionToGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window) { return pos; }
+    static inline QPoint mapPositionFromGlobal(const QPoint &pos, const QPoint &windowGlobalPosition, const QWindow *window) { return pos; }
     static inline QDpi logicalDpi() { return QDpi(-1,-1); }
 };
 
diff --git a/src/gui/kernel/qopenglcontext.cpp b/src/gui/kernel/qopenglcontext.cpp
index bf3403f2e4..5bc6e27eb2 100644
--- a/src/gui/kernel/qopenglcontext.cpp
+++ b/src/gui/kernel/qopenglcontext.cpp
@@ -787,7 +787,7 @@ QOpenGLExtraFunctions *QOpenGLContext::extraFunctions() const
     to the non-template function.
 
     Note that requests for function objects of other versions or profiles can fail and
-    in doing so will return a null pointer. Situations in which creation of the functions
+    in doing so will return \nullptr. Situations in which creation of the functions
     object can fail are if the request cannot be satisfied due to asking for functions
     that are not in the version or profile of this context. For example:
 
@@ -1330,7 +1330,7 @@ bool QOpenGLContext::supportsThreadedOpenGL()
     \since 5.5
 
     Returns the application-wide shared OpenGL context, if present.
-    Otherwise, returns a null pointer.
+    Otherwise, returns \nullptr.
 
     This is useful if you need to upload OpenGL objects (buffers, textures,
     etc.) before creating or showing a QOpenGLWidget or QQuickWidget.
diff --git a/src/gui/kernel/qplatformdialoghelper.cpp b/src/gui/kernel/qplatformdialoghelper.cpp
index d14d575056..4bee153489 100644
--- a/src/gui/kernel/qplatformdialoghelper.cpp
+++ b/src/gui/kernel/qplatformdialoghelper.cpp
@@ -41,7 +41,9 @@
 
 #include <QtCore/QCoreApplication>
 #include <QtCore/QVariant>
+#if QT_CONFIG(regularexpression)
 #include <QtCore/QRegularExpression>
+#endif
 #include <QtCore/QSharedData>
 #if QT_CONFIG(settings)
 #include <QtCore/QSettings>
@@ -786,6 +788,7 @@ const char QPlatformFileDialogHelper::filterRegExp[] =
 // Makes a list of filters from a normal filter string "Image Files (*.png *.jpg)"
 QStringList QPlatformFileDialogHelper::cleanFilterList(const QString &filter)
 {
+#if QT_CONFIG(regularexpression)
     QRegularExpression regexp(QString::fromLatin1(filterRegExp));
     Q_ASSERT(regexp.isValid());
     QString f = filter;
@@ -794,6 +797,9 @@ QStringList QPlatformFileDialogHelper::cleanFilterList(const QString &filter)
     if (match.hasMatch())
         f = match.captured(2);
     return f.split(QLatin1Char(' '), QString::SkipEmptyParts);
+#else
+    return QStringList();
+#endif
 }
 
 // Message dialog
diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index f09bec12da..ba800a696f 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -318,7 +318,9 @@ public:
         ShowDirsOnly                = 0x00000001,
         DontResolveSymlinks         = 0x00000002,
         DontConfirmOverwrite        = 0x00000004,
-        DontUseSheet                = 0x00000008,
+#if QT_DEPRECATED_SINCE(5, 14)
+        DontUseSheet Q_DECL_ENUMERATOR_DEPRECATED = 0x00000008,
+#endif
         DontUseNativeDialog         = 0x00000010,
         ReadOnly                    = 0x00000020,
         HideNameFilterDetails       = 0x00000040,
diff --git a/src/gui/kernel/qplatformtheme.cpp b/src/gui/kernel/qplatformtheme.cpp
index 277d976dde..f906f808d8 100644
--- a/src/gui/kernel/qplatformtheme.cpp
+++ b/src/gui/kernel/qplatformtheme.cpp
@@ -471,6 +471,8 @@ QVariant QPlatformTheme::themeHint(ThemeHint hint) const
         return QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ItemViewActivateItemOnSingleClick);
     case QPlatformTheme::UiEffects:
         return QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::UiEffects);
+    case QPlatformTheme::ShowShortcutsInContextMenus:
+        return QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ShowShortcutsInContextMenus);
     default:
         return QPlatformTheme::defaultThemeHint(hint);
     }
@@ -521,7 +523,7 @@ QVariant QPlatformTheme::defaultThemeHint(ThemeHint hint)
     case QPlatformTheme::StyleNames:
         return QVariant(QStringList());
     case QPlatformTheme::ShowShortcutsInContextMenus:
-        return QVariant(false);
+        return QVariant(true);
     case TextCursorWidth:
         return QVariant(1);
     case DropShadow:
diff --git a/src/gui/kernel/qplatformwindow.cpp b/src/gui/kernel/qplatformwindow.cpp
index 562289a8c9..4e95751397 100644
--- a/src/gui/kernel/qplatformwindow.cpp
+++ b/src/gui/kernel/qplatformwindow.cpp
@@ -705,14 +705,20 @@ QRect QPlatformWindow::initialGeometry(const QWindow *w,
                                           w, defaultWidth, defaultHeight);
         return QRect(initialGeometry.topLeft(), QHighDpi::toNative(size, factor));
     }
-    const QScreen *screen = effectiveScreen(w);
+    const auto *wp = qt_window_private(const_cast<QWindow*>(w));
+    const bool position = wp->positionAutomatic && w->type() != Qt::Popup;
+    if (!position && !wp->resizeAutomatic)
+        return initialGeometry;
+    const QScreen *screen = wp->positionAutomatic
+        ? effectiveScreen(w)
+        : QGuiApplication::screenAt(initialGeometry.center());
     if (!screen)
         return initialGeometry;
-    const auto *wp = qt_window_private(const_cast<QWindow*>(w));
+    // initialGeometry refers to window's screen
     QRect rect(QHighDpi::fromNativePixels(initialGeometry, w));
     if (wp->resizeAutomatic)
         rect.setSize(fixInitialSize(rect.size(), w, defaultWidth, defaultHeight));
-    if (wp->positionAutomatic && w->type() != Qt::Popup) {
+    if (position) {
         const QRect availableGeometry = screen->availableGeometry();
         // Center unless the geometry ( + unknown window frame) is too large for the screen).
         if (rect.height() < (availableGeometry.height() * 8) / 9
diff --git a/src/gui/kernel/qsessionmanager.cpp b/src/gui/kernel/qsessionmanager.cpp
index 493a321c74..e5e9c624b2 100644
--- a/src/gui/kernel/qsessionmanager.cpp
+++ b/src/gui/kernel/qsessionmanager.cpp
@@ -123,7 +123,11 @@ QSessionManagerPrivate::QSessionManagerPrivate(const QString &id,
                                                const QString &key)
     : QObjectPrivate()
 {
-    platformSessionManager = QGuiApplicationPrivate::platformIntegration()->createPlatformSessionManager(id, key);
+    if (qApp->testAttribute(Qt::AA_DisableSessionManager)) {
+        platformSessionManager = new QPlatformSessionManager(id, key);
+    } else {
+        platformSessionManager = QGuiApplicationPrivate::platformIntegration()->createPlatformSessionManager(id, key);
+    }
     Q_ASSERT_X(platformSessionManager, "Platform session management",
                "No platform session management, should use the default implementation");
 }
diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 88e76a53f7..aad5f856be 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -1682,9 +1682,9 @@ void QWindow::setGeometry(const QRect &rect)
   chicken and egg problem here: we cannot convert to native coordinates
   before we know which screen we are on.
 */
-QScreen *QWindowPrivate::screenForGeometry(const QRect &newGeometry)
+QScreen *QWindowPrivate::screenForGeometry(const QRect &newGeometry) const
 {
-    Q_Q(QWindow);
+    Q_Q(const QWindow);
     QScreen *currentScreen = q->screen();
     QScreen *fallback = currentScreen;
     QPoint center = newGeometry.center();
@@ -2559,6 +2559,10 @@ QPoint QWindow::mapToGlobal(const QPoint &pos) const
         && (d->platformWindow->isForeignWindow() || d->platformWindow->isEmbedded())) {
         return QHighDpi::fromNativeLocalPosition(d->platformWindow->mapToGlobal(QHighDpi::toNativeLocalPosition(pos, this)), this);
     }
+
+    if (QHighDpiScaling::isActive())
+        return QHighDpiScaling::mapPositionToGlobal(pos, d->globalPosition(), this);
+
     return pos + d->globalPosition();
 }
 
@@ -2579,6 +2583,10 @@ QPoint QWindow::mapFromGlobal(const QPoint &pos) const
         && (d->platformWindow->isForeignWindow() || d->platformWindow->isEmbedded())) {
         return QHighDpi::fromNativeLocalPosition(d->platformWindow->mapFromGlobal(QHighDpi::toNativeLocalPosition(pos, this)), this);
     }
+
+    if (QHighDpiScaling::isActive())
+        return QHighDpiScaling::mapPositionFromGlobal(pos, d->globalPosition(), this);
+
     return pos - d->globalPosition();
 }
 
@@ -2867,7 +2875,7 @@ void QWindow::setVulkanInstance(QVulkanInstance *instance)
 }
 
 /*!
-    \return the associated Vulkan instance or \c null if there is none.
+    \return the associated Vulkan instance if any was set, otherwise \nullptr.
  */
 QVulkanInstance *QWindow::vulkanInstance() const
 {
diff --git a/src/gui/kernel/qwindow_p.h b/src/gui/kernel/qwindow_p.h
index d918ed5b52..5a7ec518fd 100644
--- a/src/gui/kernel/qwindow_p.h
+++ b/src/gui/kernel/qwindow_p.h
@@ -113,7 +113,7 @@ public:
     void connectToScreen(QScreen *topLevelScreen);
     void disconnectFromScreen();
     void emitScreenChangedRecursion(QScreen *newScreen);
-    QScreen *screenForGeometry(const QRect &rect);
+    QScreen *screenForGeometry(const QRect &rect) const;
     void setTransientParent(QWindow *parent);
 
     virtual void clearFocusObject();
@@ -129,6 +129,7 @@ public:
 
     static Qt::WindowState effectiveState(Qt::WindowStates);
 
+    // ### Qt6: unused
     virtual bool allowClickThrough(const QPoint &) const { return true; }
 
     QWindow::SurfaceType surfaceType = QWindow::RasterSurface;