Thank you for sorting this out. Regards, Dmitrii.
2014-11-18 11:49 GMT+03:00 <jen...@gmail.com>: > > > 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
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