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  1. Qt
  2. QTBUG-40829

QWheelEvent incorrect angleDelta() value with both mouse wheel and touchpad scroll

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.4.2
    • 5.3.1
    • QPA: X11/XCB
    • None
    • openSUSE 13.1 x86_64 with Qt 5.3.1.

    Description

      If mouse wheel scrolling and touchpad scrolling are used (simultaneously or by turns), touchpad QWheelEvent after mouse QWheelEvent produces strange angleDelta() value (and pixelDelta() as well).

      Simple code in wheelEvent():
      qDebug() << "wheelEvent:" << event->phase() << event->angleDelta() << event->pixelDelta();

      Begin slowly scroll with touchpad, and while this scroll mouse wheel. Output: http://pastebin.com/kzt4ycm2

      Line 8 — mouse scroll, Line 9 — strange touchpad event.

      Somewtimes this values aren't big, sometimes too big (more than 1000).

      Attachments

        1. devices.txt
          0.6 kB
        2. events.txt
          2 kB
        3. QTBUG-40829.tgz
          0.7 kB
        4. xinput_list.txt
          5 kB

        Issue Links

          is required for

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44315 Map.zoomLevel jumps when using touch and mouse wheel zoom

          • 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-70558 Scroll jump after using stylus

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-49294 Scroll jump after open & close context menu

          • 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
          For Gerrit Dashboard: QTBUG-40829
          # Subject Branch Project Status CR V
          92824,4 Listen to XI2 deviceChanged events to reset last position 5.4 qt/qtbase Status: MERGED +2 0
          106686,1 Listen to XI2 deviceChanged events to reset last position dev qt/qtbase Status: ABANDONED 0 0

          Activity

            People

              Unassigned Unassigned
              nicklion Mykola Krachkovsky
              Votes:
              2 Vote for this issue
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              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

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