Qt::WindowStaysOnTopHint and full screen

Francky033

Hello,

I have a small problem with using Qt::WindowStaysOnTopHin in full screen.

On Windows 10, for example, windows with this flag are always visible on a GPU intel. On the other hand, on a Nvidia card, windows with the Qt::WindowStaysOnTopHint flag go to the background if I click on the main window.
I need to do a raise() to bring them to the first plan but this has an unsightly effect (screen flickering).

I also tried with the Qt::WindowStaysOnTopHint flag but it doesn't change anything.

I use Qt 5.15.0 and Opengl 4.0

Thanks !

khryleption

try using the windows winAPI function SetWindowPos.

for Qt4.7, maybe it's the same on Qt5

#ifdef WIN32
// first force to show widget on top most
// get win handle of the widget to force focus
SetWindowPos(widget->winId(), HWND_TOPMOST, 0, 0, 0, 0, SWP_DRAWFRAME | 
 WP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);

// then unforce to show widget on top most
SetWindowPos(widget->winId(), HWND_NOTOPMOST, 0, 0, 0, 0, SWP_DRAWFRAME | SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);

#endif

khryleption

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