Issue with “blanking screen” when running Qt application in fullscreen mode
问题 We have a Qt based browser application which uses QWebEninge under the hood. Currently we are fighting with an issue where the screen goes blank for a moment eacht time the window gets or looses the focus (f.ex. each time the QVirtualKeyboard becomes invoked). Following a Qt's recommendation, we tried to implement QWindowsWindowFunctions::setHasBorderInFullScreen prior to call of QMainWindow::showFullScreen() . But this results in an inacceptable reduction of the available window area, e.g.