QGraphicsScene stops updating when application is minimized
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Hi,
I've got an issue in an application that I'm working on where when I minimize my app, the QGraphicsScene stops responding to calls to update - drawBackground never gets called. Even though the app is not being displayed, I do various OpenGL drawings to off screen buffers from drawBackground that need to happen 50 times a second to generate a constant video output. This wasn't an issue in 5.7.0, it's only happening now that I've updated to 5.9.1.
Is there any way I can force drawBackground to still happen?
Thanks,
Steve.
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Hi,
I've got an issue in an application that I'm working on where when I minimize my app, the QGraphicsScene stops responding to calls to update - drawBackground never gets called. Even though the app is not being displayed, I do various OpenGL drawings to off screen buffers from drawBackground that need to happen 50 times a second to generate a constant video output. This wasn't an issue in 5.7.0, it's only happening now that I've updated to 5.9.1.
Is there any way I can force drawBackground to still happen?
Thanks,
Steve.
@Steve_Hardingson
did you try to callrepaint()instead ofupdate() -
Yeah, I called repaint on the view, and on view->viewport(), but it didn't have any effect. Is there an equivalent to repaint for QGraphicsScene?
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Yeah, I called repaint on the view, and on view->viewport(), but it didn't have any effect. Is there an equivalent to repaint for QGraphicsScene?
@Steve_Hardingson
then you will have to decouple your custom painting from Qt's painting events, to keep the background painting running.
