All Animation in widget not work when use vtk with Qml

I think all animation not work when this widget is in qml .
Because , all mouse event are handled in quickItem::sync() function ,and animation is running in mouse event’s callback , after deal with mouse handle , qquickItem::Paint() will run and the frame will flash , so ,no animation ,only the last frame will show .

So, any one have any idea with this ? Thanks !