Bug 418170

Summary: Text becomes blurry during expanding animation of treeview at 1.5x scale factor
Product: [Applications] systemsettings Reporter: postix <postix>
Component: generalAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED UPSTREAM    
Severity: normal CC: kde, nate, postix
Priority: NOR    
Version: 5.17.5   
Target Milestone: ---   
Platform: Other   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=415528
Latest Commit: Version Fixed In:
Attachments: Screenshot of the current of font selection dialog.

Description postix 2020-02-25 12:02:13 UTC
Created attachment 126400 [details]
Screenshot of the current of font selection dialog.

SUMMARY

Expanding an item in the treeview of the Font Managment KCM makes the items, which will shift downwards, become blurry, during the animation. Please see the recording.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.67.0
Qt Version: 5.14.1
Kernel Version: 5.5.2-1-MANJARO

ADDITIONAL INFORMATION
Scaling: 1.5
Comment 1 postix 2020-02-25 12:10:18 UTC
This happens at all KCM which uses a tree view.
Comment 2 Nate Graham 2020-02-25 16:16:35 UTC
Does this affect tree views outside of System Settings too?
Comment 3 Kai Uwe Broulik 2020-02-25 16:17:28 UTC
QTreeView takes a pixmap of the item for the animation and probably forgot to take into account devicePixelRatio there.
Comment 4 Kai Uwe Broulik 2020-02-25 16:30:11 UTC
Upstream fix: https://codereview.qt-project.org/c/qt/qtbase/+/291947