void OnPanned(UIPanGestureRecognizer gr)
{
if (!_element.IsVisible)
{
return;
}
if (touchCount == 0)
{
touchCount++;
}
PanEventArgs panEventArgs = new iOSPanEventArgs(gr, (BaseGestureEventArgs)_lastPanArgs ?? _downGestureArgs);
if (gr.State == UIGestureRecognizerState.Ended || gr.State == UIGestureRecognizerState.Cancelled || gr.State == UIGestureRecognizerState.Failed)
{
touchCount = 0;
if (_lastPanArgs == null)
{
return;
}
_lastPanArgs = null;
_pinching = false;
_rotating = false;
_panning = false;
_longPressing = false;
Point velocity = panEventArgs.Velocity;
bool xTriggered = Math.Abs(velocity.X) > Settings.SwipeVelocityThreshold.X;
bool yTriggered = Math.Abs(velocity.Y) > Settings.SwipeVelocityThreshold.Y;
if (xTriggered || yTriggered)
{
Direction direction = Direction.NotClear;
if (!yTriggered)
{
direction = ((velocity.X > 0.0) ? Direction.Right : Direction.Left);
}
else if (!xTriggered)
{
direction = ((velocity.Y > 0.0) ? Direction.Down : Direction.Up);
}
SwipeEventArgs args = new iOSSwipeEventArgs(gr, direction)
{
VelocityX = velocity.X,
VelocityY = velocity.Y
};
foreach (var listener in _listeners)
{
if (listener.HandlesSwiped)
{
args.Listener = listener;
listener.OnSwiped(args);
if (args.Handled)
{
break;
}
}
}
}
foreach (var listener in _listeners)
{
if (listener.HandlesPanning || listener.HandlesPanned)
{
panEventArgs.Listener = listener;
listener.OnPanned(panEventArgs);
if (panEventArgs.Handled)
{
break;
}
}
}
}
else
{
_panning = true;
foreach (var listener in _listeners)
{
if (!panEventArgs.Equals(_lastPanArgs) && listener.HandlesPanning)
{
panEventArgs.Listener = listener;
listener.OnPanning(panEventArgs);
if (panEventArgs.Handled)
{
break;
}
}
}
_lastPanArgs = panEventArgs;
}
}
void OnPanned(UIPanGestureRecognizer gr)
{
if (!_element.IsVisible)
{
return;
}
if (touchCount == 0)
{
//System.Diagnostics.Debug.WriteLine("new _viewLocationAtOnDown");
//System.Diagnostics.Debug.WriteLine("onPanned set _viewLocationAtOnDown");
_viewLocationAtOnDown = ViewLocationInWindow(gr.View);
touchCount++;
}
//System.Diagnostics.Debug.WriteLine("NativeGestureHandler.onPanned");
PanEventArgs panEventArgs = new iOSPanEventArgs(gr, _lastPanArgs, _viewLocationAtOnDown);
if (gr.State == UIGestureRecognizerState.Ended || gr.State == UIGestureRecognizerState.Cancelled || gr.State == UIGestureRecognizerState.Failed)
{
touchCount = 0;
//System.Diagnostics.Debug.WriteLine("\tonPanned _touchCount=0 = [" + _touchCount + "]");
//System.Diagnostics.Debug.WriteLine("\tend");
if (_lastPanArgs == null)
{
return;
}
_lastPanArgs = null;
_pinching = false;
_rotating = false;
_panning = false;
_longPressing = false;
bool handled = false;
foreach (var listener in _listeners)
{
//if (handled)
// break;
if (listener.HandlesSwiped)
{
Point velocity = panEventArgs.Velocity;
bool xTriggered = Math.Abs(velocity.X) > Settings.SwipeVelocityThreshold.X;
bool yTriggered = Math.Abs(velocity.Y) > Settings.SwipeVelocityThreshold.Y;
if (xTriggered || yTriggered)
{
Direction direction = Direction.NotClear;
if (!yTriggered)
{
direction = ((velocity.X > 0.0) ? Direction.Right : Direction.Left);
}
else if (!xTriggered)
{
direction = ((velocity.Y > 0.0) ? Direction.Down : Direction.Up);
}
SwipeEventArgs args = new iOSSwipeEventArgs(gr, direction, _viewLocationAtOnDown);
args.Listener = listener;
args.VelocityX = velocity.X;
args.VelocityY = velocity.Y;
listener.OnSwiped(args);
//gr.CancelsTouchesInView = swipeEventArgs.Handled;
//return;
handled = handled || args.Handled;
if (handled)
{
break;
}
}
}
}
//gr.CancelsTouchesInView = handled;
//if (handled)
// return;
foreach (var listener in _listeners)
{
//if (handled)
// break;
if (listener.HandlesPanning || listener.HandlesPanned)
{
var taskArgs = new PanEventArgs(panEventArgs);
taskArgs.Listener = listener;
listener.OnPanned(taskArgs);
//gr.CancelsTouchesInView = panEventArgs.Handled;
//return;
handled = handled || taskArgs.Handled;
if (handled)
{
break;
}
}
}
//gr.CancelsTouchesInView = handled;
//if (handled)
// return;
}
else
{
//System.Diagnostics.Debug.WriteLine("\tmove");
_panning = true;
bool handled = false;
foreach (var listener in _listeners)
{
//System.Diagnostics.Debug.WriteLine("\tlistener.handlesPanning=["+listener.HandlesPanning+"]");
//if (handled)
// break;
if (!panEventArgs.Equals(_lastPanArgs) && listener.HandlesPanning)
{
var taskArgs = new PanEventArgs(panEventArgs);
taskArgs.Listener = listener;
listener.OnPanning(taskArgs);
handled = handled || taskArgs.Handled;
if (handled)
{
break;
}
}
}
//gr.CancelsTouchesInView = handled;
_lastPanArgs = panEventArgs;
//System.Diagnostics.Debug.WriteLine("_viewLocationAtOnDown ["+_viewLocationAtOnDown+"]");
}
}