[marble] [Bug 489223] New: Using a Plasma 6 desktop, a MarbleWidget shortly flashes up as an extra window after being instantiated

[Tobias Leupold]

https://bugs.kde.org/show_bug.cgi?id=489223

            Bug ID: 489223
           Summary: Using a Plasma 6 desktop, a MarbleWidget shortly
                    flashes up as an extra window after being instantiated
    Classification: Applications
           Product: marble
           Version: 24.05.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: marble-bugs at kde.org
          Reporter: tl at stonemx.de
  Target Milestone: ---

Created attachment 171004
  --> https://bugs.kde.org/attachment.cgi?id=171004&action=edit
CMakeLists.txt

Hi all :-)

When you run a Plasma 6 desktop and run a program using a MarbleWidget, the
widget shortly flashes up as an extra window after being instantiated. I'll
attach a minimal example demonstrating this.

I saw this exact behavior with another project, always happening when
QWidget::show() was called before the widget was added to a layout. This either
did not happen using a Plasma 5 desktop, or at least the flashing was not
visible.

For this exact case, I noticed it whilst using KGeoTag. On Plasma 5, everything
is normal as usual. When I start KGeoTag on Plasma 6, the MarbleWidget flashes.
Just like with the to-be-attached demo.

Maybe, you want to to fix this.

Cheers, Tobias

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