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QtWebEngineView slow first rendering
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I have an application that shows it's window with
QWebEngineView. I set the instance of the object to the QtMainWindow as central widget. The main window is created with transparency set.The first time I show the main window, as first see the frame, next after ~300ms I see the QWebEngineView finally renders itself. The second main window hide/show works without any glitches.
I tried pre-create the window object. And to show the window on an action, it did not help.
Is there something trivial for me to check? Or is there a way to make QWebEngineView to prepare/pre-render its page?