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  1. Qt
  2. QTBUG-56075

QML Flickable: high-precision trackpad scrolling is too fast

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Details

    • a8fbd865140d4dd165723c7e3d4168514d4b1d0c (qt/qtdeclarative/dev) d728049372ee3020a11d28bb4d214a48876df630 (qt/qtdeclarative/6.2) 03143a5e518cd7758fc652f21eb229a92696877e (qt/tqtc-qtdeclarative/5.15)
    • Bug Fixing Candidates, UI Bug Fixing Q1/2021

    Description

      I have tested a project that makes use of a QML ListView. Scrolling with a trackpad works, but it is way too fast and it is impossible to scroll the list by a small amount. The speed of scrolling is certainly way too high. No problems occurs when using touch to scroll the list.

      For example, in the Qt Quick Controls 2 Gallery example, attempting to drag a bit in the drawer list to see what is available triggers a flick that scrolls all the way to the other end of the list.

      Attachments

        1. e1d2bcf-qt5.diff
          18 kB
        2. no-light-speed-flicking.patch
          11 kB
        3. qtbug56075_treeview.qml
          0.3 kB
        4. qtbug56075.qml
          0.4 kB
        5. qtbug56075.zip
          4 kB

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-38570 QtQuick scrolling behavior erratic with XInput2 high-precision scrolling

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-82565 Scrolling QML views with mouse wheel or touchpad is quite bad

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

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. QTBUG-73063 Qt Quick Changes in Qt 6

          • Not Evaluated - Not yet evaluated/prioritized
          • Open
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-22407 Scrolling qml Flickable on mac

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-35608 Flickable speed and deceleration does not scale with pixel density

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-80720 More controls for touchpad scrolling. Stopping Flickable extra scrolling.

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-52643 Dragging threshold on high DPI touch devices is too small

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-49024 Ctrl+two finger scrolling on touchpad is too sensitive (XI2)

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-101268 ListView does not preserve its relative scrollbar position when window is restored down on Windows if height of ListView.header changes dynamically

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-97055 QQC2 Flickable scrolling is not linear with clicky wheels on Qt 6.2.0

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed

          Task - A task that needs to be done. QTBUG-96227 Support high-resolution scrolling using libinput

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          For Gerrit Dashboard: QTBUG-56075
          # Subject Branch Project Status CR V
          173985,3 Flickable: fix scrolling speed with high-precision trackpads dev qt/qtdeclarative Status: ABANDONED -2 0
          173986,2 Add QWheelEvent::pixelDeltaF() for fractional pixel delta dev qt/qtbase Status: ABANDONED -2 0
          173993,2 QQuickWindow: don't discard timestamps for wheel events 5.6 qt/qtdeclarative Status: MERGED +2 0
          173998,1 XCB: Provide fractional pixel delta for high-precision trackpads dev qt/qtbase Status: ABANDONED 0 0
          174013,1 XCB: Calculate accumulated pixel delta for wheel events 5.6 qt/qtbase Status: DEFERRED -1 0
          174014,1 Flickable: fix scrolling speed with high-precision trackpads 5.6 qt/qtdeclarative Status: DEFERRED 0 0
          174423,1 Flickable: fix scrolling speed with high-precision trackpads wip/pointerhandler qt/qtdeclarative Status: ABANDONED 0 0
          214619,4 Fix flickable with mouse-wheel 5.11 qt/qtdeclarative Status: DEFERRED -1 0
          232807,2 xcb: add qt.qpa.input.events logging of wheel events 5.11 qt/qtbase Status: MERGED +2 0
          323604,9 Kill Flickable's wheel momentum if angleDeltas not multiples of 120 dev qt/qtdeclarative Status: MERGED +2 0
          323605,1 Limit Flickable wheel-scrolling velocity to maximumFlickVelocity() dev qt/qtdeclarative Status: ABANDONED 0 0
          325773,2 Kill Flickable's wheel momentum if angleDeltas not multiples of 120 6.0 qt/qtdeclarative Status: MERGED +2 0
          347174,2 Make horizontal and vertical Flickables independent dev qt/qtdeclarative Status: MERGED +2 0
          347437,5 Revert "Kill Flickable's wheel momentum" dev qt/qtdeclarative Status: MERGED +2 0
          347438,8 Fix Flickable wheel velocity calculation dev qt/qtdeclarative Status: MERGED +2 0
          358496,5 QtTest: use delay properly in mouseWheel() dev qt/qtdeclarative Status: MERGED +2 0
          359093,4 Fix Flickable wheel velocity calculation 6.2 qt/qtdeclarative Status: MERGED +2 0
          359095,3 Revert "Kill Flickable's wheel momentum" 6.2 qt/qtdeclarative Status: MERGED +2 0
          359303,2 QtTest: use delay properly in mouseWheel() 6.2 qt/qtdeclarative Status: MERGED +2 0
          362217,9 Fix Flickable wheel velocity calculation tqtc/lts-5.15 qt/tqtc-qtdeclarative Status: MERGED -1 0
          384703,2 QtTest: use delay properly in mouseWheel() tqtc/lts-5.15 qt/tqtc-qtdeclarative Status: MERGED +2 0

          Activity

            People

              srutledg Shawn Rutledge
              daljit97 Daljit Singh
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              16 Vote for this issue
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              33 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

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