Review Request 129669: WindowThumbnail] Update thumbnail content

[Anthony Fieroni]

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Review request for Plasma and David Edmundson.


Repository: plasma-framework


Description
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Bug is introdused in https://git.reviewboard.kde.org/r/128763/
The problem is that releaseResources not call update since discardPixmap does. In fact update is needed after startRedirection


Diffs
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  src/declarativeimports/core/windowthumbnail.cpp a67453883 

Diff: https://git.reviewboard.kde.org/r/129669/diff/


Testing
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Steps to reproduce:
1. Enable window thumbnail in taskmanager
2. Hover task, wait for thumbnail
3. Minimize task
4. Move cursor out of panel
5. Move cursor over same task, wait for thumbnail
6. UpdatePaintNode does not called -> thumbnail is render black


Thanks,

Anthony Fieroni

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