Add a ThemeChange event.

- Pass it from QWindowSystemInterface via QWindow to the widgets.
- Add handler code from 4.8 / qapplication_win.cpp to qwidget.cpp.

Change-Id: Ic759563aa00cb93fe014c1bf41020446c1927dec
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 5ca6364fbb..4d80aafea5 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -661,6 +661,10 @@ void QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePriv
         QGuiApplicationPrivate::reportLogicalDotsPerInchChange(
                 static_cast<QWindowSystemInterfacePrivate::ScreenLogicalDotsPerInchEvent *>(e));
         break;
+    case QWindowSystemInterfacePrivate::ThemeChange:
+        QGuiApplicationPrivate::processThemeChanged(
+                    static_cast<QWindowSystemInterfacePrivate::ThemeChangeEvent *>(e));
+        break;
     case QWindowSystemInterfacePrivate::Map:
         QGuiApplicationPrivate::processMapEvent(static_cast<QWindowSystemInterfacePrivate::MapEvent *>(e));
         break;
@@ -888,6 +892,14 @@ void QGuiApplicationPrivate::processWindowStateChangedEvent(QWindowSystemInterfa
     }
 }
 
+void QGuiApplicationPrivate::processThemeChanged(QWindowSystemInterfacePrivate::ThemeChangeEvent *tce)
+{
+    if (QWindow *window  = tce->window.data()) {
+        QEvent e(QEvent::ThemeChange);
+        QGuiApplication::sendSpontaneousEvent(window, &e);
+    }
+}
+
 void QGuiApplicationPrivate::processGeometryChangeEvent(QWindowSystemInterfacePrivate::GeometryChangeEvent *e)
 {
     if (e->tlw.isNull())