add_pinchDelta(function(sender, e))
pinchDelta.add(function(sender, e))
remove_pinchDelta(function(sender, e))
pinchDelta.remove(function(sender, e))
    
            
        
            Pinch events are only supported by touch devices.
The PinchDelta event will always fire after PinchStarted occurs and any of the following occurs:
On a device that supports touch: When the user moves the fingers after pinch operation has been started.
| Parameter | Type | Description | 
|---|---|---|
| sender | 'var' | The source of the event. | 
| e | InteractivePinchDeltaEventArgs | The event data. |