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  1. Qt
  2. QTBUG-65648

Map + MouseArea double multi-touch problem

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    • Commits:
      710f9507c0ebf01d9e9f717e676b9c3b1b94ee8a

      Description

      When the map is double clicked with multiple fingers (2 or more) then the MouseArea's "doubleClick" and "longPress" signals are not emitted anymore:
       

      import QtQuick 2.7
      import QtQuick.Controls 2.0
      import QtQuick.Layouts 1.3
      
      import QtLocation 5.9
      import QtPositioning 5.8
      
      ApplicationWindow {
          visible: true
          width: 640
          height: 480
          title: qsTr("Hello World")
      
          Map {
              id: map
              anchors.fill: parent
      
              plugin: Plugin {
                  name: "osm"
              }
      
              MouseArea {
                  anchors.fill: parent
                  acceptedButtons: Qt.LeftButton | Qt.RightButton
      
                  onDoubleClicked: {
                      var mouseGeoPos = map.toCoordinate(Qt.point(mouse.x, mouse.y));
                      var preZoomPoint = map.fromCoordinate(mouseGeoPos, false);
      
                      if (mouse.button === Qt.LeftButton) {
                          map.zoomLevel = Math.floor(map.zoomLevel)+1;
                      }
                      else if (mouse.button === Qt.RightButton) {
                          map.zoomLevel = Math.floor(map.zoomLevel)-1;
                      }
      
                      var postZoomPoint = map.fromCoordinate(mouseGeoPos, false);
                      var dx = postZoomPoint.x - preZoomPoint.x;
                      var dy = postZoomPoint.y - preZoomPoint.y;
      
                      var mapCenterPoint = Qt.point(map.width / 2.0 + dx, map.height / 2.0 + dy);
                      map.center = map.toCoordinate(mapCenterPoint);
                  }
              }
          }
      }

      The problem happens sometimes on Android, iOS, Windows RT. It can be best reproduced 100% on an iPhone 6 Plus (iOS 11).

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              Assignee:
              smd Jan Arve
              Reporter:
              DanielSt Peter Staab
              Votes:
              3 Vote for this issue
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              8 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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