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  1. Qt
  2. QTBUG-107239

DragHandler propagates tap event through Flickable to underlying TapHandler

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P3: Somewhat important P3: Somewhat important
    • None
    • 6.2.4, 6.5.3, 6.8.3, 6.9.0 RC
    • None
    • a6e196ce9 (dev), ae7069bfa (6.5), dd3484343 (6.5.0), b0bb5823e (6.4), a8fb5c36c (tqtc/lts-6.2)

      DragHandler propagates tap event through Flickable/ListView to underlying TapHandler.

      Code example:

      import QtQuick
      import QtQuick.Layouts
      
      Window {
          id: window
          width: 640
          height: 480
          visible: true
      
          Rectangle {
              id: mainRect
              anchors.fill: parent
              TapHandler {
                  onTapped: {
                      mainRect.color = Qt.rgba(Math.random(), Math.random(), Math.random(), 1)
                      console.log("Tapped")
                  }
              }
          }
      
          Flickable {
              id: flickable
              anchors {
                  fill: parent
                  leftMargin: 50
                  rightMargin: 50
              }
              contentWidth: content.implicitWidth
              contentHeight: content.implicitHeight
      
              ColumnLayout {
                  id: content
                  width: flickable.width
                  Rectangle {
                      Layout.fillWidth: true
                      height: window.height / 2 + 100
                      border.width: 1
                      color: 'red'
                      DragHandler {
                          onActiveChanged: console.log("Drag active: " + active)
                      }
                  }
      
                  Rectangle {
                      Layout.fillWidth: true
                      height: window.height / 2 + 100
                      border.width: 1
                      color: 'blue'
                  }
              }
          }
      }
      

      Steps to reproduce:
      click on "red" rectangle (flickable's child with DragHandler inside)

      Actual results:
      tap event is propagated to underlying rectangle (id: mainRect), see console output

      Expected result:
      tap event is NOT propagated to underlying rectangle (id: mainRect), i.e. the behavior should be
      the same as for "blue" rectangle (flickable's child without DragHandler inside)

      Note:
      in the example above, if we drop Flickable from there, the behavior for "red" and "blue" rectangle
      will be identical. both will propagate tap event to underlying rectangle with TapHandler.

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            qt.team.quick.subscriptions Qt Quick and Widgets Team
            studiosus Vladimir Belyavsky
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            3 Vote for this issue
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            6 Start watching this issue

              Created:
              Updated:

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