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  1. Qt
  2. QTBUG-66226

REG->5.9.4: QLabel using a QGraphicsOpacityEffect with opacity of 1.0 is not visible in a layout if it is not the topmost QLabel in the layout

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    Description

      QLabel using a QGraphicsOpacityEffect with opacity of 1.0 is not visible in a layout if it is not the topmost QLabel in the layout.

      Steps to reproduce:

      • run the sample app attached
      • observe the QLabels placed inside a QVBoxLayout
        EXPECTED: All three QLabels (holding identical pixmaps) are visible
        ACTUAL: The middle one is not visible. Topmost label with 1.0 opacity is visible as well as the bottom one with opacity of 0.99

      Fixing QTBUG-60231 may have caused this ("Set sharedPainter correctly for QGraphicsEffect" 7257862fb2edfab0219d6cd45c83677049404f7d https://codereview.qt-project.org/#/c/214111/ ).

      Attachments

        1. qtbug66226.png
          qtbug66226.png
          13 kB
        2. qtbug66226.zip
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        Issue Links

          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-60231 Crash when QGraphicsOpacityEffect has 1.0 opacity and child widget has graphics effect

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              qt.team.quick.subscriptions Qt Quick and Widgets Team
              risto.sipola Risto Sipola
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              Dates

                Created:
                Updated:
                Resolved:

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