public override void TouchesBegan(NSSet touches, UIEvent evt)
{
base.TouchesBegan(touches, evt);
try
{
UITouch[] arr = evt.AllTouches.ToArray <UITouch>();
if (arr.Length == 2)
{
_resize = Math.Sqrt(Math.Abs(arr[0].LocationInView(this).X - arr[1].LocationInView(this).X) * Math.Abs(arr[0].LocationInView(this).X - arr[1].LocationInView(this).X) + Math.Abs(arr[0].LocationInView(this).Y - arr[1].LocationInView(this).Y) * Math.Abs(arr[0].LocationInView(this).Y - arr[1].LocationInView(this).Y));
// _resizeReady = true;
ignore_action = false;
}
UITouch touch = touches.AnyObject as UITouch;
if (touch != null)
{
_touchesX = touch.LocationInView(this).X;
_touchesY = touch.LocationInView(this).Y;
GestureFrame _gi = (GestureFrame)this.Element;
EventArgs e = new EventArgs();
_gi.OnDown(this, e, (float)_touchesX, (float)_touchesY, (int)touch.TapCount);
}
}
catch (Exception ex)
{
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Frame> e)
{
base.OnElementChanged(e);
GestureFrame control = (GestureFrame)Element;
if (control == null)
{
return;
}
if (control.IsSwipe)
{
taped = new UITapGestureRecognizer(
(action) =>
{
try
{
if (action.State == UIGestureRecognizerState.Ended)
{
CGPoint point = action.LocationOfTouch(0, null);
GestureFrame _gi = (GestureFrame)this.Element;
float scale = (float)UIScreen.MainScreen.Scale;
_gi.OnUp(this, e, ((float)point.X) * scale, ((float)point.Y) * scale);
_gi.OnTapped(this, e, ((float)point.X) * scale, ((float)point.Y) * scale);
}
else if (action.State == UIGestureRecognizerState.Began)
{
CGPoint point = action.LocationOfTouch(0, null);
GestureFrame _gi = (GestureFrame)this.Element;
float scale = (float)UIScreen.MainScreen.Scale;
_gi.OnDown(this, e, ((float)point.X) * scale, ((float)point.Y) * scale, 0);
}
else if (action.State == UIGestureRecognizerState.Changed)
{
CGPoint point = action.LocationOfTouch(0, null);
GestureFrame _gi = (GestureFrame)this.Element;
float scale = (float)UIScreen.MainScreen.Scale;
_gi.OnMove(this, e, ((float)point.X) * scale, ((float)point.Y) * scale);
}
}
catch (Exception ex)
{
Logs.LogEx(ex);
}
}
)
{
};
swipeDown = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeDown();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Down,
};
swipeUp = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeTop();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Up,
};
swipeLeft = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeLeft();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Left,
};
swipeRight = new UISwipeGestureRecognizer(
() =>
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnSwipeRight();
}
)
{
Direction = UISwipeGestureRecognizerDirection.Right,
};
if (e.NewElement == null)
{
if (swipeDown != null)
{
this.RemoveGestureRecognizer(swipeDown);
}
if (swipeUp != null)
{
this.RemoveGestureRecognizer(swipeUp);
}
if (swipeLeft != null)
{
this.RemoveGestureRecognizer(swipeLeft);
}
if (swipeRight != null)
{
this.RemoveGestureRecognizer(swipeRight);
}
if (taped != null)
{
this.RemoveGestureRecognizer(taped);
}
}
if (e.OldElement == null)
{
this.AddGestureRecognizer(swipeDown);
this.AddGestureRecognizer(swipeUp);
this.AddGestureRecognizer(swipeLeft);
this.AddGestureRecognizer(swipeRight);
this.AddGestureRecognizer(taped);
}
}
}
void HandleTouch(object sender, TouchEventArgs e)
{
bool cancelBase = false;
if (e.Event.ActionMasked == MotionEventActions.Down)
{
_tapedDownTime = e.Event.EventTime;
_tapedX = e.Event.RawX;
_tapedY = e.Event.RawY;
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnDown(sender, e, e.Event.RawX, e.Event.RawY, e.Event.ActionIndex);
}
if (e.Event.ActionMasked == MotionEventActions.Pointer1Up)
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnResizeDone(sender, e);
_resizeReady = false;
ignore_action = true;
}
if (e.Event.ActionMasked == MotionEventActions.Pointer1Down)
{
_resizeReady = true;
ignore_action = false;
if (_resizeReady)
{
MotionEvent.PointerCoords p0 = new MotionEvent.PointerCoords();
MotionEvent.PointerCoords p1 = new MotionEvent.PointerCoords();
e.Event.GetPointerCoords(0, p0);
e.Event.GetPointerCoords(1, p1);
_resize = Math.Sqrt(Math.Abs(p0.X - p1.X) * Math.Abs(p0.X - p1.X) + Math.Abs(p0.Y - p1.Y) * Math.Abs(p0.Y - p1.Y));
}
}
else if (e.Event.ActionMasked == MotionEventActions.Up)
{
GestureFrame _gi = (GestureFrame)this.Element;
_gi.OnUp(sender, e, e.Event.RawX, e.Event.RawY);
if ((e.Event.EventTime - _tapedDownTime < 250) &&
Math.Abs(_tapedX - e.Event.RawX) < 20 && Math.Abs(_tapedY - e.Event.RawY) < 20)
{
_gi.OnTapped(sender, e, e.Event.RawX, e.Event.RawY);
}
if (e.Event.PointerCount <= 1)
{
ignore_action = false;
}
}
else if (e.Event.ActionMasked == MotionEventActions.Move)
{
GestureFrame _gi = (GestureFrame)this.Element;
double rs = DetectResizeMotion(e);
if (-1 != rs)
{
_gi.OnResize(sender, e, _resize, rs);
}
else if (!ignore_action)
{
float d = Forms.Context.ApplicationContext.Resources.DisplayMetrics.Density;
float deltaX = _tapedX - e.Event.RawX;
float deltaY = _tapedY - e.Event.RawY;
cancelBase = _gi.OnMove(sender, e, deltaX / d, deltaY / d);
}
}
_detector.OnTouchEvent(e.Event);
}
