The QWidget overload of qWaitForWindowExposed waits for the widget's
top level QWindow, which for the viewport is the graphics-view.
We want to explicitly wait for the viewport to be exposed, as the
viewport is covering the whole graphics-view, preventing it from
being exposed. See
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| qgl | ||
| qglbuffer | ||
| qglfunctions | ||
| qglthreads | ||
| opengl.pro | ||