qt: Broken QApplication::widgetAt() on Ubuntu Focal 20.04 #19186

1. 
   hebasto commented at 11:15 am on June 6, 2020: member

   This report is separated from #18419.

   On Ubuntu Focal 20.04 (both Qt 5.9.8 and system Qt 5.12.8) the QApplication::widgetAt() returns nullptr when it shouldn’t. This upstream bug breaks our GUIUtil::isObscured(), and, as consequences, the BitcoinGUI::toggleHidden() and the “Show / Hide” menu item in the system tray icon menu.

   Here are some possible answers for this Focal/Qt bug:

   • drop the “Show / Hide” menu item
   • replace the “Show / Hide” menu item with “Minimize / Restore” one
   • another approach

   What do you think?

2. hebasto added the label Bug on Jun 6, 2020
3. 
   hebasto commented at 11:16 am on June 6, 2020: member

   ping @promag @jonasschnelli @jonatack
4. fanquake added the label GUI on Jun 6, 2020
5. 
   MarcoFalke commented at 11:49 am on June 6, 2020: member

   This upstream bug

   Is there a link?

6. 
   hebasto commented at 11:53 am on June 6, 2020: member

   This upstream bug

   Is there a link?

   Did not find yet.

7. 
   promag commented at 9:29 pm on August 2, 2020: member

   On Ubuntu Focal 20.04 (both Qt 5.9.8 and system Qt 5.12.8) the QApplication::widgetAt() returns nullptr when it shouldn’t.

   In what case? Always? When the widget is minimized?

8. 
   hebasto commented at 11:01 pm on August 2, 2020: member

   @promag

   On Ubuntu Focal 20.04 (both Qt 5.9.8 and system Qt 5.12.8) the QApplication::widgetAt() returns nullptr when it shouldn’t.

   In what case? Always? When the widget is minimized?

   When the main window is visible. The “Hide” command from the systray icon menu does not work.

9. 
   fanquake commented at 6:52 am on August 10, 2020: member

   If this is still something you want to follow up with, can you reopen this in the gui repo.
10. fanquake closed this on Aug 10, 2020

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11. DrahtBot locked this on Feb 15, 2022

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hebasto MarcoFalke promag fanquake

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