add_dragDelta(function(sender, e))
dragDelta.add(function(sender, e))
remove_dragDelta(function(sender, e))
dragDelta.remove(function(sender, e))
    
            
        
            The DragDelta event will always fire after DragStarted occurs and any of the following occurs:
On a device that supports mouse: When the user moves the mouse while holding the button down after a drag operation has been started.
On a device that supports touch: When the user moves the finger after a drag operation has been started.
| Parameter | Type | Description | 
|---|---|---|
| sender | 'var' | The source of the event. | 
| e | InteractiveDragDeltaEventArgs | The event data. |