X11 application not responding in Ubuntu [closed] - c++

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Closed 6 years ago.
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I'm using Ubuntu (Gnome) and sometimes I receive the message
“YourApp” is not responding.
You may choose to wait a short while for it to continue or force the application to quit entirely.
although the app was responding just fine.
Is there an event that needs to be handled in X11 to prevent the above message? Something like a WM_PING or the like
Thanks in advance!

You need to be processing the event queue (regularly) in order for your application to not be deemed 'not responding'.

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