On 24.11.2016 17:28, Sergey Bylokhov wrote:

Hi, Semyon.
On 16.11.16 20:43, Semyon Sadetsky wrote:
The proposed solution posts paint event after the initial configuration
of the content window and ignore all WM expose events until the window
initialization is finished to avoid unwanted intermediate paints.

Should the paintEvent be posted only if "needHandleResize" is true, which will means that the size was changed and repaint is necessary?
Upon the content window configuration? Yes, paint event is only required if the content window is firstly configured because the previous expose events might be skipped. In other scenarios paint is posted by the expose event handler.
Why the call to validateSurface() was removed?
because it has been already called in reshape().

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