Marker.qml Example File

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 import QtQuick 2.0;
 import QtLocation 5.0
 import QtLocation.examples 5.0

 MapQuickItem {
     id: marker
     property alias lastMouseX: markerMouseArea.lastX
     property alias lastMouseY: markerMouseArea.lastY

     anchorPoint.x: image.width/4
     anchorPoint.y: image.height

     coordinate: Coordinate { latitude : 0; longitude : 0 }

     sourceItem: Image {
         id: image
         source: markerMouseArea.containsMouse ? (markerMouseArea.pressed  ? "../../resources/marker_selected.png" :"../../resources/marker_hovered.png") : "../../resources/marker.png"
         MapMouseArea  {
             id: markerMouseArea
             property int pressX : -1
             property int pressY : -1
             property int jitterThreshold : 10
             property int lastX: -1
             property int lastY: -1
             anchors.fill: parent
             hoverEnabled : false
             drag.target: marker

             onPressed : {
                 map.pressX = mouse.x
                 map.pressY = mouse.y
                 map.currentMarker = -1
                 for (var i = 0; i< map.markers.length; i++){
                     if (marker == map.markers[i]){
                         map.currentMarker = i
                         break
                     }
                 }
                 map.state = ""
             }

             onPressAndHold:{
                 if (Math.abs(map.pressX - mouse.x ) < map.jitterThreshold
                         && Math.abs(map.pressY - mouse.y ) < map.jitterThreshold) {
                     lastX = map.toScreenPosition(marker.coordinate).x
                     lastY = map.toScreenPosition(marker.coordinate).y
                     map.markerPopup()
                 }
             }
         }

         Text{
             id: number
             y: image.height/4
             color: "white"
             font.bold: true
             font.pixelSize: 14
             width:27
             horizontalAlignment: Text.AlignHCenter
             Component.onCompleted: {
                 text = map.markerCounter
             }
         }

     }

     Component.onCompleted: {
         coordinate.longitude = mouseArea.lastCoordinate.longitude
         coordinate.latitude = mouseArea.lastCoordinate.latitude
     }
 }