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  1. Qt
  2. QTBUG-74062

QCombobox drop-down list jumping on open

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.12.3, 5.14.0 Alpha
    • 5.12.0, 5.12.1
    • GUI: Look'n'Feel
    • None
    • Tested on:
      Windows 10 64bit Version 1809 (Desktop)
      Qt with MSVC2017 64bit compiler
      CPU: Intel Core i7-8700
      Graphics: Intel UHD Graphics 630 (CPU integrated)
      (no OpenGL drivers installed)
    • Windows
    • 74aeacace4124b7452a3b1e951e1a3b25f84d47f (qt/qtbase/5.12)

    Description

      QCombobox: After pushing the drop-down button the drop-down list does not open straight down horizontal aligned with the QComboxBox position. At first the opening list is shifted a bit to the left and after that aligns horizontally correct to the QComboBox position.

      This is a regression that took place since Qt 5.12.0!

      Qt 5.11.3 and all prior versions are fine. That means QComboBox drop-down list opens straight horizontal aligned to QComboxBox as it used to be in Windows.

      In some cases I were not able to reduce to a test case the drop-down list even opens with a short black frame flicker. So there might be a deeper issue behind all that. The same here Qt 5.11.3 and prior doesn't show that.

      A short test application is attached.

      Attachments

        1. combotest.zip
          1 kB
        2. image-2019-02-28-10-18-59-029.png
          image-2019-02-28-10-18-59-029.png
          9 kB
        3. qtbug74062.zip
          2 kB

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-72849 QComboBox dropdown glitch on Windows

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-74101 QComboBox menu is drawn shifted

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-74442 QComboBox popup animation weirdly offset to the left

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-75895 QComboBox pop-up menu is shifted during animation.

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-74176 [Reg 5.11.0-5.11.2][Windows] QOpenGLWidget causes black flicker in tooltips and other widgets before displaying content

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-55762 Windows 10: QWidget move() method does not take account the slim borders of Windows 10

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Activity

            People

              qt.team.quick.subscriptions Qt Quick and Widgets Team
              mireiner Chris
              Votes:
              1 Vote for this issue
              Watchers:
              10 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: