set SymbolAtlas dpr to primary screen's dpr #2965
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Set the startup DPR of
ScatterPlotItem'sSymbolAtlasto the primary screen's DPR, so that users with hidpi screens are not penalized by a guaranteedSymbolAtlasrebuild.https://doc.qt.io/qt-6/qguiapplication.html#primaryScreen-prop says that:
This will be the screen where QWindows are initially shown, unless otherwise specified.Fixes #2960
Test script can be found in the comments of the linked issue.
Remarks:
ScatterPlotItemcan (surprisingly) be instantiated without aQGuiApplication, in which case there will be no primary screen.