[REG] Map + MouseArea double multi-touch problem

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);
            }
        }
    }
}