DragAndDropEvent not having source element position

Hi,

My application requirement is to connect two elements on dragAndDrop.
I am using canvas to draw line between elements to be connected.

I am getting AbsoluteLeft and AbsoluteTop for target from DragAndDropEvent using which well centered line to target is drawn.

But for source(Dragged element) not getting any values using which element can be located.
Only below values(drag mouse click) are present in event,
sourceDetails.getMouseDownEvent().getClientY();
sourceDetails.getMouseDownEvent().getClientX();

Please suggest some solution.
Thanks