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  1. Qt
  2. QTBUG-52452

High DPI painting errors for widgets in scroll area if QT_SCALE_FACTOR is a point number > 1

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    • a2157df28b8aaa0c6fc02a35a2b24fa82cb77230

      If a QT_SCALE_FACTOR point number is used (e.g. 1.25 or 1.5 - typical values on today's monitors with Windows 10), painting errors occur, if widgets are placed inside of a scroll area and the scrollbars are used to scroll the scroll area content.

      The attached application shows this issue. Start the application with the included StartHighDpiFixed_125.bat. Then scroll around and move the mouse over the widgets in the scroll area to see the painting issues.

        1. HighDpiScrollAreaIssue.png
          12 kB
          Uwe Kindler
        2. ScrollAreaWidgets.zip
          8 kB
          Uwe Kindler
        3. qtbug52452.png
          83 kB
          Qt Support
        4. qtbug52452.zip
          7 kB
          Friedemann Kleint
        For Gerrit Dashboard: QTBUG-52452
        # Subject Branch Project Status CR V
        166087,2 HighDPI: Disable scrolling for non-integer deltas 5.6 qt/qtbase Status: MERGED +2 0

            sorvig Morten Sørvig
            ukindler Uwe Kindler
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              Created:
              Updated:
              Resolved:

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