> On 16 Nov 2014, at 14:21, Dmitrii Volosnykh <dmitrii.volosn...@gmail.com> > wrote: > > Is such a behaviour is correct or this should be considered as a bug? > > onPaint handler gets triggered on requestPaint() and markDirty(Qt.rect(0, 0, > width, height)). > > "if (!visible) return" guard works as a workaround.
Hi Dmitrii, it is indeed intended behavior so I am rejecting that task. There are several scenarios where you wan’t canvas to allow a repaint even while hidden so we cannot make such assumptions. I.e prepare content before it is shown on screen, using a canvas as an image source for another canvas or even reading out pixels values directly from the buffer without ever showing it on screen. A canvas is also a data structure and it’s visibility is not related to actual contents. Your workaround would be a good way of handling it provided you know that none of the above scenarios apply to you. Regards, Jens _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
