Why so many events with an open dialog.

[SpanishJohn]

Hi,

So I installed an event filter into QApplication so I could capture all my application events for debug etc (debug text is sent to separate console window). With the application open (a GUI) I get the following:

1 (TimerEvent) - I installed a timer
5 (MouseMove Event) - when I move the mouse
129 (MouseHoverEvent) - when I move the mouse.

Now the interesting bit, when I open a simple modal dialog, and with the dialog static in the middle of the screen and the mouse static I get a continuous stream of the following:

170 (DynamicPropertyChangeEvent) - continuous
77 (UpdateRequestEvent) - continuous
12 (PaintEvent) - continuous

Why is Qt continuously re-drawing the dialog widgets?

Thanks in advance SJ

[raven-worx]

paint event can be caused by many actions (mouse moves, explicit calls, resize, etc.)
Mostly they are optimized by only requesting a redraw of a (sub-)area.

Where exactly is the problem with the paint events?