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  1. Qt
  2. QTBUG-63548

QGuiApplication::devicePixelRatio() provides out-of-date value if displays change after app launch

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P2: Important P2: Important
    • None
    • 5.10.0 Alpha, 5.12.0 RC
    • GUI: Window management, GUI: Workspace
    • None
    • macOS
    • ba304af284f4cbb579d35046c0cf4c1537af0fec

      QGuiApplication::devicePixelRatio() caches its value to improve performance. However, its cache is not refreshed when the system's displays change (if a HiDPI/Retina display is added or removed, or if a display's devicePixelRatio changes), so it can provide an out-of-date value.

        1. devicePixelRatioTest.zip
          3 kB
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            qt.team.graphics.and.multimedia Qt Graphics Team
            smokris Steve Mokris
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              Created:
              Updated:
              Resolved:

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