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  1. Qt
  2. QTBUG-100343

MDI subwindows leave artifacts when moving/resizing with fractional scaling

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Details

    • Bug
    • Resolution: Fixed
    • P2: Important
    • 6.2.5, 6.3.0, 6.4.0
    • 6.2, 6.3
    • GUI: High-DPI
    • None

    Description

      Tested Qt 6.2.3 (as released) and the dev branch from 1/31/2022. When moving a subwindow in an MDI area, there are artifacts left behind, until something triggers updating the affected areas eventually.

      This is not happening with the scale factor set to 100% or 150%, but happens consistently with 125%.

      Applying the work in progress patch https://codereview.qt-project.org/c/qt/qtbase/+/392989 reduces the size of the artifacts somewhat but there are still thin lines left behind.

      Pictured below is the widgets/mainwindow/mdi example:

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            vgt Eirik Aavitsland
            lagocs Laszlo Agocs
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            Dates

              Created:
              Updated:
              Resolved:

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