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  1. Qt
  2. QTBUG-83004

Tooltips and ComboBox dropdown animation stutter on Windows

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Details

    • Bug
    • Resolution: Duplicate
    • Not Evaluated
    • None
    • 5.14.1, 5.14.2
    • None
    • Windows 8.1 x86_64, 1366x768 screen with 100% dpi
    • Windows

    Description

      When clicking on a combobox to display available values, the drop down list stutter when opening itself.

      They open with a pause of like 400ms when animating here (the exact moment when it pauses is not exactly the same, the drop down will be a bit more open or closed):

      Then after that 500ms pause, the dropdown list continues and open fully.

       

      Also, tooltips don't display itself fully unless I move the mouse:

      If I make a small mouse movement, the tooltip displays itself correctly:

      It seems that the tooltip animation is blocked and does not resume.

      After many tests, I got the tooltip animation blocked like this, which shows the tooltip partially:

      See also videos in attachment.

       

      In both cases, it seems that the combobox and tooltip animations are stopping themselves without completing until an event appear (like moving the mouse) which cause them to resume.

      If when opening a combobox or a tooltip I continuously move the mouse over the control, the animation is played almost without stutter.

       

      I've tested multiples setups:

      • QtCreator 4.12.0 beta2 with Qt 5.14.2: produce the issue state here
      • QtCreator 4.10.0 with Qt 5.13.1: no animation issue
      • QtCreator 4.10.0 with Qt 5.14.2 (by copying Qt's dll from QtCreator 4.12.0 beta2): produce the issue state here

      So it is related to Qt only, not QtCreator.

      This is the link I used to install QtCreator 4.12.0 beta2: https://download.qt.io/development_releases/qtcreator/4.12/4.12.0-beta2/qt-creator-opensource-windows-x86_64-4.12.0-beta2.exe

      Attachments

        1. image-2020-03-22-22-22-25-895.png
          0.9 kB
          Alexis Murzeau
        2. image-2020-03-22-22-24-04-221.png
          2 kB
          Alexis Murzeau
        3. image-2020-03-22-22-26-48-853.png
          2 kB
          Alexis Murzeau
        4. image-2020-03-22-23-11-33-009.png
          2 kB
          Alexis Murzeau
        5. long_combobox_qt_5.13.1.avi
          310 kB
          Alexis Murzeau
        6. long_combobox_qt_5.14.2.avi
          261 kB
          Alexis Murzeau
        7. small_combobox_qt_5.13.1.avi
          184 kB
          Alexis Murzeau
        8. small_combobox_qt_5.14.2.avi
          197 kB
          Alexis Murzeau
        9. tooltip_qt_5.13.1.avi
          87 kB
          Alexis Murzeau
        10. tooltip_qt_5.14.2.avi
          100 kB
          Alexis Murzeau

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              qt.team.quick.subscriptions Qt Quick and Widgets Team
              amurzeau Alexis Murzeau
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              Dates

                Created:
                Updated:
                Resolved:

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