+ \fn void QQuickWindow::beforeSynchronizing()
+
+ This signal is emitted before the scene graph is synchronized with the QML state.
+
+ This signal can be used to do any preparation required before calls to
+ QQuickItem::updatePaintNode().
+
+ The GL context used for rendering the scene graph will be bound at this point.
+
+ \warning This signal is emitted from the scene graph rendering thread. If your
+ slot function needs to finish before execution continues, you must make sure that
+ the connection is direct (see Qt::ConnectionType).
+
+ \warning Make very sure that a signal handler for beforeSynchronizing leaves the GL
+ context in the same state as it was when the signal handler was entered. Failing to
+ do so can result in the scene not rendering properly.
+*/
+
+/*!