How to cancel a google map marker drag operation?

Question

As you see in the following code, the Markers are draggable. In some cases, If a marker is dropped in a wrong area(polygon) I would like to cancel the drop event and consequently the marker come back to its original location automatically.

function placeMarker(latlng, color, isDraggable) {
    var marker = new GMarker(latlng, { icon: getIcon(color), draggable: true });
    map.addOverlay(marker);
    GEvent.addListener(marker, "dragend", function () {
        //redraw polygons again
    });
    GEvent.addListener(marker, "click", function () {
        var latlng = marker.getPoint();
        map.openInfoWindowHtml(marker.getPoint(), latlng.y + ", " + latlng.x);
    });
    return marker;
}

The question is how can I cancel the drag event of marker when it's already dropped in dragend event?

Copt

Why not just use an InfoWindow to show the marker's lat/lng, and not make the marker draggable at all? – Humanoid

Just declare their draggable property as false and their clickable property as true. They will still listen to clicks and mouseover events. – Downstairs

@MattBall I need to be draggable. – Copt

Answer 1

Still couldn't find any solutions after these years, and yet again encountering this issue. I wish there was event.cancelDrag()to call.

All I can think of is to check if the marker belongs to mypolygon if not move it back to where it was before:

• On dragstart save the current location as preLocation
• on dragend use containsLocation(e.latLng, mypolygon)
  • yes => do nothing
  • no: set the marker location to preLocation.

google map containsLocation

google map Events

Copt

Answer 2

I don't remember that Google Map API support it but you can serve this functionality for yourself by saving markers' movements to a stack and extracting old position when you need it. I know it isn't irrefragable answer. It just general idea. But I hope it will helpful.

Goldwin

Really, why you don't whant to make the marker undraggable at all? – Goldwin

That's the method which is implemented here: Duncan's blog -- Google Maps API – locked draggable markers – Blowfly