[Interest] Drawing artifacts when scrolling QGraphicsView on OS X

[Daniël de Kok]

On Jun 8, 2012, at 2:44 PM, Jelmer van der Linde <jelmer at ikhoefgeen.nl> wrote:
> It is only when I scroll that Qt doesn't invalidate the the old drawing area. As if the position changes due to scrolling aren't taken into account when invalidating the old rect.

Also see the workaround that Jelmer referred to: the artifacts do not occur when we invalidate the region when the user scrolls. We do this using the bounding rect of the tooltip, so the size should not be an issue.

Since, this bug does not occur with Qt < 4.8 on OS X and any Qt 4 version on Linux or Windows, we suspect that this is a bug specifically in Qt 4.8 on OS X.

Take care,
Daniël