1 files changed, 48 insertions, 8 deletions

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index f429ad2229..87c95e6420 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -503,6 +503,7 @@ static QWindowGeometrySpecification windowGeometrySpecification;
         \li \c {-qwindowgeometry} \e geometry, specifies window geometry for
             the main window using the X11-syntax. For example:
             \c {-qwindowgeometry 100x100+50+50}
+        \li \c {-qwindowicon}, sets the default window icon
         \li \c {-qwindowtitle}, sets the title of the first window
         \li \c{-reverse}, sets the application's layout direction to
             Qt::RightToLeft. This option is intended to aid debugging and should
@@ -1108,12 +1109,15 @@ void QGuiApplicationPrivate::createPlatformIntegration()
 
     // Get command line params
 
+    QString icon;
+
     int j = argc ? 1 : 0;
     for (int i=1; i<argc; i++) {
         if (argv[i] && *argv[i] != '-') {
             argv[j++] = argv[i];
             continue;
         }
+        const bool isXcb = platformName == "xcb";
         QByteArray arg = argv[i];
         if (arg.startsWith("--"))
             arg.remove(0, 1);
@@ -1126,12 +1130,16 @@ void QGuiApplicationPrivate::createPlatformIntegration()
         } else if (arg == "-platformtheme") {
             if (++i < argc)
                 platformThemeName = QString::fromLocal8Bit(argv[i]);
-        } else if (arg == "-qwindowgeometry" || (platformName == "xcb" && arg == "-geometry")) {
+        } else if (arg == "-qwindowgeometry" || (isXcb && arg == "-geometry")) {
             if (++i < argc)
                 windowGeometrySpecification = QWindowGeometrySpecification::fromArgument(argv[i]);
-        } else if (arg == "-qwindowtitle" || (platformName == "xcb" && arg == "-title")) {
+        } else if (arg == "-qwindowtitle" || (isXcb && arg == "-title")) {
             if (++i < argc)
                 firstWindowTitle = QString::fromLocal8Bit(argv[i]);
+        } else if (arg == "-qwindowicon" || (isXcb && arg == "-icon")) {
+            if (++i < argc) {
+                icon = QString::fromLocal8Bit(argv[i]);
+            }
         } else {
             argv[j++] = argv[i];
         }
@@ -1144,6 +1152,8 @@ void QGuiApplicationPrivate::createPlatformIntegration()
 
     init_platform(QLatin1String(platformName), platformPluginPath, platformThemeName, argc, argv);
 
+    if (!icon.isEmpty())
+        forcedWindowIcon = QDir::isAbsolutePath(icon) ? QIcon(icon) : QIcon::fromTheme(icon);
 }
 
 /*!
@@ -1426,6 +1436,20 @@ QPlatformNativeInterface *QGuiApplication::platformNativeInterface()
 }
 
 /*!
+    Returns a function pointer from the platformplugin matching \a function
+*/
+QFunctionPointer QGuiApplication::platformFunction(const QByteArray &function)
+{
+    QPlatformIntegration *pi = QGuiApplicationPrivate::platformIntegration();
+    if (!pi) {
+        qWarning() << "QGuiApplication::platformFunction(): Must construct a QGuiApplication before accessing a platform function";
+        return Q_NULLPTR;
+    }
+
+    return pi->nativeInterface() ? pi->nativeInterface()->platformFunction(function) : Q_NULLPTR;
+}
+
+/*!
     Enters the main event loop and waits until exit() is called, and then
     returns the value that was set to exit() (which is 0 if exit() is called
     via quit()).
@@ -1548,8 +1572,9 @@ void QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePriv
     case QWindowSystemInterfacePrivate::WindowScreenChanged:
         QGuiApplicationPrivate::processWindowScreenChangedEvent(static_cast<QWindowSystemInterfacePrivate::WindowScreenChangedEvent *>(e));
         break;
-    case QWindowSystemInterfacePrivate::ApplicationStateChanged:
-        QGuiApplicationPrivate::setApplicationState(static_cast<QWindowSystemInterfacePrivate::ApplicationStateChangedEvent *>(e)->newState);
+    case QWindowSystemInterfacePrivate::ApplicationStateChanged: {
+        QWindowSystemInterfacePrivate::ApplicationStateChangedEvent * changeEvent = static_cast<QWindowSystemInterfacePrivate::ApplicationStateChangedEvent *>(e);
+        QGuiApplicationPrivate::setApplicationState(changeEvent->newState, changeEvent->forcePropagate); }
         break;
     case QWindowSystemInterfacePrivate::FlushEvents:
         QWindowSystemInterface::deferredFlushWindowSystemEvents();
@@ -1944,7 +1969,7 @@ void QGuiApplicationPrivate::processWindowScreenChangedEvent(QWindowSystemInterf
 {
     if (QWindow *window  = wse->window.data()) {
         if (QScreen *screen = wse->screen.data())
-            window->d_func()->setScreen(screen, false /* recreate */);
+            window->d_func()->setTopLevelScreen(screen, false /* recreate */);
         else // Fall back to default behavior, and try to find some appropriate screen
             window->setScreen(0);
     }
@@ -2628,6 +2653,15 @@ QClipboard * QGuiApplication::clipboard()
 #endif
 
 /*!
+    \since 5.4
+    \fn void QGuiApplication::paletteChanged(const QPalette &palette)
+
+    This signal is emitted when the \a palette of the application changes.
+
+    \sa palette()
+*/
+
+/*!
     Returns the default application palette.
 
     \sa setPalette()
@@ -2653,6 +2687,7 @@ void QGuiApplication::setPalette(const QPalette &pal)
     else
         *QGuiApplicationPrivate::app_pal = pal;
     applicationResourceFlags |= ApplicationPaletteExplicitlySet;
+    emit qGuiApp->paletteChanged(*QGuiApplicationPrivate::app_pal);
 }
 
 QRect QGuiApplicationPrivate::applyWindowGeometrySpecification(const QRect &windowGeometry, const QWindow *window)
@@ -2862,9 +2897,9 @@ Qt::ApplicationState QGuiApplication::applicationState()
     \sa applicationState()
 */
 
-void QGuiApplicationPrivate::setApplicationState(Qt::ApplicationState state)
+void QGuiApplicationPrivate::setApplicationState(Qt::ApplicationState state, bool forcePropagate)
 {
-    if (applicationState == state)
+    if ((applicationState == state) && !forcePropagate)
         return;
 
     applicationState = state;
@@ -3065,6 +3100,8 @@ void QGuiApplicationPrivate::saveState()
     On system start-up, the default layout direction depends on the
     application's language.
 
+    The notifier signal was introduced in Qt 5.4.
+
     \sa QWidget::layoutDirection, isLeftToRight(), isRightToLeft()
  */
 
@@ -3075,7 +3112,10 @@ void QGuiApplication::setLayoutDirection(Qt::LayoutDirection direction)
 
     layout_direction = direction;
 
-    QGuiApplicationPrivate::self->notifyLayoutDirectionChange();
+    if (qGuiApp) {
+        emit qGuiApp->layoutDirectionChanged(direction);
+        QGuiApplicationPrivate::self->notifyLayoutDirectionChange();
+    }
 }
 
 Qt::LayoutDirection QGuiApplication::layoutDirection()