Avoid qobject_cast

This is slightly faster, and also avoids accessing the object's meta
object that would cause any lazily created meta objects (e.g., for
QML) from being built.

This is just a port of commit a5972f8ec32631e70578c64e9d6c063b3c47f0f5
(which fixed QGuiApplication, but not QApplication).

Change-Id: I0d5080495aa4fd4486db297968c4d06bbfacf89b
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

diff --git a/src/widgets/kernel/qapplication.cpp b/src/widgets/kernel/qapplication.cpp
index dc09155..803d1ef 100644 (file)
--- a/src/widgets/kernel/qapplication.cpp
+++ b/src/widgets/kernel/qapplication.cpp
@@ -2978,7 +2978,8 @@ bool QApplication::notify(QObject *receiver, QEvent *e)
     d->checkReceiverThread(receiver);
 #endif
 
-    QGuiApplicationPrivate::sendQWindowEventToQPlatformWindow(qobject_cast<QWindow *>(receiver), e);
+    if (receiver->isWindowType())
+        QGuiApplicationPrivate::sendQWindowEventToQPlatformWindow(static_cast<QWindow *>(receiver), e);
 
     // capture the current mouse/keyboard state
     if(e->spontaneous()) {