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  1. Qt
  2. QTBUG-96030

TapHandler PassiveGrab prohibits event propagation to MouseArea click

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    • Windows

    Description

      Observation
      TapHandler with Passive Grab does not trigger MouseArea Click. The TapHandler is wrapped in an item to ensure it's an Item sibling of the MouseArea and both are overlapping.

      Expectation
      Because the TapHandler creates only a passive grab, I've expected to get the CLICKED log entry.

      Code

      Item {
   anchors.fill: parent

   MouseArea {
      objectName: "mouseArea"
      anchors.fill: parent
      onClicked: () => console.log("CLICKED");
   }

   Item {
      objectName: "handlerContainer"
      anchors.fill: parent

      TapHandler {
         objectName: "tapHandler"
         gesturePolicy: TapHandler.DragThreshold
         onTapped: () => console.log("TAP");
      }
   }
}

      qt.quick.handler.dispatch: "tapHandler" checking device type QFlags<QInputDevice::DeviceType>(AllDevices) pointer type QFlags<QPointingDevice::PointerType>(AllPointerTypes) modifiers QFlags<Qt::KeyboardModifier>(KeyboardModifierMask)
qt.quick.handler.dispatch: QQuickTapHandler "tapHandler" on QQuickItem "handlerContainer" WANTS QMouseEvent(MouseButtonPress LeftButton pos=18,287 scn=18,287 gbl=-1141,394 dev=QPointingDevice("core pointer" Mouse id=1))
qt.quick.handler.tap: "tapHandler" pressed false -> true  QEventPoint(id=0 ts=5805 pos=18,287 scn=18,287 gbl=-1141,394 Pressed vel=24.0964,-7.98291 press=18,287 last=18,287 ? 0,0) gp QQuickTapHandler::DragThreshold
qt.quick.handler.grab: QQuickTapHandler(0x163dca07ea0, name = "tapHandler") QEventPoint(id=0 ts=5805 pos=18,287 scn=18,287 gbl=-1141,394 Pressed vel=24.0964,-7.98291 press=18,287 last=18,287 ? 0,0) true via QQuickDeliveryAgent(root=QQuickRootItem)
qt.quick.handler.grab: QEventPoint(id=0 ts=5805 pos=18,287 scn=18,287 gbl=-1141,394 Pressed vel=24.0964,-7.98291 press=18,287 last=18,287 ? 0,0) QPointingDevice::GrabPassive QQuickTapHandler(0x163dca07ea0, name = "tapHandler")
qt.quick.mouse: QQuickDeliveryAgent(root=QQuickRootItem) QMouseEvent(MouseButtonRelease LeftButton pos=18,287 scn=18,287 gbl=-1141,394 dev=QPointingDevice("core pointer" Mouse id=1))
qt.quick.handler.dispatch: "tapHandler" checking device type QFlags<QInputDevice::DeviceType>(AllDevices) pointer type QFlags<QPointingDevice::PointerType>(AllPointerTypes) modifiers QFlags<Qt::KeyboardModifier>(KeyboardModifierMask)
qt.quick.handler.dispatch: QQuickTapHandler "tapHandler" on QQuickItem "handlerContainer" WANTS QMouseEvent(MouseButtonRelease LeftButton pos=18,287 scn=18,287 gbl=-1141,394 dev=QPointingDevice("core pointer" Mouse id=1))
qt.quick.handler.tap: "tapHandler" pressed true -> false  QEventPoint(id=0 ts=5884 pos=18,287 scn=18,287 gbl=-1141,394 Released vel=7.22891,-2.39487 press=18,287 last=18,287 ? 0,0) gp QQuickTapHandler::DragThreshold
qt.quick.handler.tap: "tapHandler" tapped 1 times

qml: TAP

qt.quick.handler.grab: QEventPoint(id=0 ts=5884 pos=18,287 scn=18,287 gbl=-1141,394 Released vel=7.22891,-2.39487 press=18,287 last=18,287 ? 0,0) QPointingDevice::UngrabPassive QQuickTapHandler(0x163dca07ea0, name = "tapHandler")

      Notes

      • Enable "false" on the TapHandler makes the MouseArea react again
      • TapHandler without Item container does not work (only MouseArea active then) (qt.quick.handler.dispatch: QQuickTapHandler "tapHandler" on QQuickItem "" DECLINES QMouseEvent(...))
      • onPressed on MouseArea is not working as well

      Attachments

        Issue Links

          duplicates

          Task - A task that needs to be done. QTBUG-68099 make it possible to press a TapHandler and a MouseArea at the same time

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Reported
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-73262 it's confusing that TapHandler.gesturePolicy affects event propagation

          • 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.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-96050 TapHandler PassiveGrab prohibits event propagation to Button click

          • 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-70397 TapHandler fires for all overlapping items

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported
          For Gerrit Dashboard: QTBUG-96030
          # Subject Branch Project Status CR V
          369785,2 WIP test MouseArea under item with TapHandler dev qt/qtdeclarative Status: NEW -2 0
          385031,2 WIP PointerHandler: add acceptsEvents property dev qt/qtdeclarative Status: ABANDONED -2 0

          Activity

            People

              srutledg Shawn Rutledge
              michl86 Michael Piendl
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              Dates

                Created:
                Updated:

                Gerrit Reviews

                  There is 1 open Gerrit change