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, 6 insertions, 0 deletions

diff --git a/src/gui/kernel/qwindowsysteminterface_qpa.cpp b/src/gui/kernel/qwindowsysteminterface_qpa.cpp
index f4f7551c04..e6c4454104 100644
--- a/src/gui/kernel/qwindowsysteminterface_qpa.cpp
+++ b/src/gui/kernel/qwindowsysteminterface_qpa.cpp
@@ -340,6 +340,12 @@ void QWindowSystemInterface::handleScreenLogicalDotsPerInchChange(QScreen *scree
     QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
 }
 
+void QWindowSystemInterface::handleThemeChange(QWindow *tlw)
+{
+    QWindowSystemInterfacePrivate::ThemeChangeEvent *e = new QWindowSystemInterfacePrivate::ThemeChangeEvent(tlw);
+    QWindowSystemInterfacePrivate::queueWindowSystemEvent(e);
+}
+
 void QWindowSystemInterface::handleMapEvent(QWindow *tlw)
 {
     QWindowSystemInterfacePrivate::MapEvent *e = new QWindowSystemInterfacePrivate::MapEvent(tlw);