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  1. Qt
  2. QTBUG-42842

ANGLE: An openGL window inside widget created with QWidget::createWindowContainer doesn't handle maximizing the parent window properly.

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      If you have an OpenGL window inside a widget created with QWidget::createWindowContainer and are using ANGLE (i.e. app.setAttribute(Qt::AA_UseOpenGLES)), the OpenGL window doesn't clear out the surface properly when you maximize the parent window. See the attached screenshot. Reproducible with e.g. with ...\Examples\Qt-5.4\widgets\windowcontainer example, if you add the above application attribute setting.

        1. Window container refresh issue in 5.4.0 RC ANGLE.png
          Window container refresh issue in 5.4.0 RC ANGLE.png
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            owolff Oliver Wolff
            e0348803 Miikka Heikkinen
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