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  1. Qt
  2. QTBUG-87646

WheelHandler doesn't work correctly with TouchPad

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    • macOS
    • 13d2a4e31 (dev), 9f4ef1785 (6.5)

    Description

      The WheelHandler should be usable for managing two-finger pan gestures on the Macbook trackpad.  However, the wheel event returns Mouse as the device type both for trackpad events, as well as for actual wheel events coming from a connected mouse. 

      Attached example logs the same device type value regardless of whether the wheel event came from a mouse or the touchpad.

      No other input handler seems capable of dealing with two finger drag on the touchpad (without a click to drag).  So, the wheel events need to properly identify the source device in order to support both mouse wheels and trackpads.  Limiting the WheelHandler to just TouchPad devices also doesn't work, since it apparently sees the trackpad as a mouse device.

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          relates to

          Task - A task that needs to be done. QTBUG-72167 Add a device tree

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-112432 wayland plugin should distinguish touchpads from mice, etc.

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-112394 Minimal map example - WheelHandler not working

          • 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-63363 QPointingDevices for the trackpad and mouse are dynamically instantiated on macOS

          • P4: Low - Would be nice to fix, but it's not very important.
          • Reported
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              qt.team.quick.subscriptions Qt Quick and Widgets Team
              ttgil Gil
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                Updated:
                Resolved:

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