public bool OnTouch(View v, MotionEvent ev)
{
if (AnimatingZoomEnding || ev.PointerCount > 2)
{
return(true);
}
ScaleGestureDetector.OnTouchEvent(ev);
GestureDetector.OnTouchEvent(ev);
var action = ev.Action & MotionEventActions.Mask;
switch (action)
{
case MotionEventActions.PointerDown:
case MotionEventActions.Down:
switch (State)
{
case STATE_IDLE:
State = STATE_POINTER_DOWN;
break;
case STATE_POINTER_DOWN:
State = STATE_ZOOMING;
ev.MidPointOfEvent(InitialPinchMidPoint);
StartZoomingView(Target);
break;
}
break;
case MotionEventActions.Move:
if (State == STATE_ZOOMING)
{
ev.MidPointOfEvent(CurrentMovementMidPoint);
CurrentMovementMidPoint.X -= InitialPinchMidPoint.X;
CurrentMovementMidPoint.Y -= InitialPinchMidPoint.Y;
CurrentMovementMidPoint.X += TargetViewCords.X;
CurrentMovementMidPoint.Y += TargetViewCords.Y;
float x = CurrentMovementMidPoint.X;
float y = CurrentMovementMidPoint.Y;
ZoomableView.SetX(x);
ZoomableView.SetY(y);
}
break;
case MotionEventActions.PointerUp:
case MotionEventActions.Up:
case MotionEventActions.Cancel:
switch (State)
{
case STATE_ZOOMING:
EndZoomingView();
break;
case STATE_POINTER_DOWN:
State = STATE_IDLE;
break;
}
break;
}
return(true);
}