public void RemovePinchListener(IPinchListener listener)
{
if (_pinchStartListeners != null)
_pinchStartListeners -= listener.OnPinchStart;
if (_pinchUpdateListeners != null)
_pinchUpdateListeners -= listener.OnPinchUpdate;
if (_pinchEndListeners != null)
_pinchEndListeners -= listener.OnPinchEnd;
}
/*private void UpdateGesture(TouchPoint pt1, TouchPoint pt2)
* {
* this.gesture.Handled = false;
* this.gesture.Position = pt1.Position;
* this.gesture.Position2 = pt2.Position;
*
* double dx = pt1.Position.X - pt2.Position.X;
* double dy = pt1.Position.Y - pt2.Position.Y;
*
* this.gesture.Distance = Math.Max(1, Math.Sqrt((dx * dx) + (dy * dy)));
* }*/
private void OnListenerUnloaded(object sender, RoutedEventArgs e)
{
IPinchListener listener = e.OriginalSource as IPinchListener;
if (listener != null)
{
this.RemoveListener(listener);
}
}
public void AddListener(IPinchListener listener)
{
this.listeners.Add(listener);
listener.Unloaded += this.OnListenerUnloaded;
if (!this.eventHooked)
{
//Windows.UI.Xaml.Input.Pointer
//Touch.FrameReported += this.OnFrameReported;
this.eventHooked = true;
}
}
public void RemoveListener(IPinchListener listener)
{
if (this.listeners.Count == 0)
{
return;
}
this.listeners.Remove(listener);
listener.Unloaded -= this.OnListenerUnloaded;
if (this.listeners.Count == 0)
{
//Touch.FrameReported -= this.OnFrameReported;
this.eventHooked = false;
this.pinching = false;
}
}
public void AddPinchListener(IPinchListener listener)
{
_pinchStartListeners += listener.OnPinchStart;
_pinchUpdateListeners += listener.OnPinchUpdate;
_pinchEndListeners += listener.OnPinchEnd;
}
