void OnUp(DownUpGestureRecognizer gr, UITouch[] touchesEnded)
{
if (!_element.IsVisible)
{
return;
}
bool handled = false;
DownUpEventArgs args = new iOSDownUpEventArgs(gr, touchesEnded);
foreach (var listener in _listeners)
{
if (listener.HandlesUp)
{
args.Listener = listener;
listener.OnUp(args);
handled = handled || args.Handled;
if (handled)
{
break;
}
}
}
touchCount--;
}
public iOSDownUpEventArgs(DownUpGestureRecognizer gr, UITouch[] triggeringTouches, CoreGraphics.CGPoint viewLocationAtStart)
{
Cancelled = (gr.State == UIGestureRecognizerState.Cancelled || gr.State == UIGestureRecognizerState.Failed);
ViewPosition = iOSEventArgsHelper.GetViewPosition(gr.View.Frame);
Touches = iOSEventArgsHelper.GetTouches(gr, viewLocationAtStart);
TriggeringTouches = GetTriggeringTouches(gr, triggeringTouches, viewLocationAtStart);
}
void OnDown(DownUpGestureRecognizer gr, UITouch[] touchesBegan)
{
_panning = false;
if (!_element.IsVisible)
{
return;
}
bool handled = false;
touchCount++;
DownUpEventArgs args = new iOSDownUpEventArgs(gr, touchesBegan);
foreach (var listener in _listeners)
{
if (listener.HandlesDown)
{
args.Listener = listener;
listener.OnDown(args);
handled = handled || args.Handled;
if (handled)
{
break;
}
}
}
_downGestureArgs = args;
}
public iOSDownUpEventArgs(DownUpGestureRecognizer gr, UITouch[] triggeringTouches)
{
Cancelled = (gr.State == UIGestureRecognizerState.Cancelled || gr.State == UIGestureRecognizerState.Failed);
ElementPosition = gr.View.BoundsInFormsCoord();
ElementTouches = iOSEventArgsHelper.GetTouches(gr, gr.View);
WindowTouches = iOSEventArgsHelper.GetTouches(gr, null);
TriggeringTouches = GetTriggeringTouches(gr, triggeringTouches);
}
private int[] GetTriggeringTouches(DownUpGestureRecognizer gr, UITouch[] triggeringTouches, CoreGraphics.CGPoint locationAtStart)
{
Point[] array = Enumerable.ToArray <Point>(Enumerable.Select <UITouch, Point>(triggeringTouches, delegate(UITouch t) {
CGPoint cGPoint = t.LocationInView(null);
return(new Point(cGPoint.X - locationAtStart.X, cGPoint.Y - locationAtStart.Y));
}));
List <int> list = new List <int>();
for (int i = 0; i < Touches.Length; i++)
{
Point t = Touches[i];
if (Enumerable.Any <Point>(array, (Point p) => Math.Abs(p.X - t.X) < 0.1 && Math.Abs(p.Y - t.Y) < 0.1))
{
list.Add(i);
}
}
return(list.ToArray());
}
void OnDown(DownUpGestureRecognizer gr, UITouch[] touchesBegan)
{
_panning = false;
if (!_element.IsVisible)
{
return;
}
/*
* var control = (UIView)_view.GetPropertyValue ("Control");
* if (control is UIButton)
* ((UIButton)control).SendActionForControlEvents (UIControlEvent.TouchDown);
*/
bool handled = false;
if (touchCount == 0)
{
//System.Diagnostics.Debug.WriteLine("onDown set _viewLocationAtOnDown");
_viewLocationAtOnDown = ViewLocationInWindow(gr.View);
}
touchCount++;
//System.Diagnostics.Debug.WriteLine("\tNativeGestureHandler.onDown _touchCount=["+_touchCount+"] _viewLocation=["+_viewLocationAtOnDown+"]");
foreach (var listener in _listeners)
{
//if (handled)
// break;
if (listener.HandlesDown)
{
DownUpEventArgs args = new iOSDownUpEventArgs(gr, touchesBegan, _viewLocationAtOnDown)
{
Listener = listener
};
listener.OnDown(args);
handled = handled || args.Handled;
if (handled)
{
break;
}
}
}
//gr.CancelsTouchesInView = handled;
//System.Diagnostics.Debug.WriteLine("\thandled=["+handled+"]");
}
void OnUp(DownUpGestureRecognizer gr, UITouch[] touchesEnded)
{
if (!_element.IsVisible)
{
return;
}
/*
* var control = (UIView)_view.GetPropertyValue ("Control");
* if (control is UIButton)
* ((UIButton)control).SendActionForControlEvents (UIControlEvent.TouchUpInside);
*/
bool handled = false;
foreach (var listener in _listeners)
{
//if (handled)
// break;
if (listener.HandlesUp)
{
DownUpEventArgs args = new iOSDownUpEventArgs(gr, touchesEnded, _viewLocationAtOnDown)
{
Listener = listener
};
listener.OnUp(args);
handled = handled || args.Handled;
if (handled)
{
break;
}
}
}
touchCount--;
//System.Diagnostics.Debug.WriteLine("onUp touchCount-- = ["+_touchCount+"] touchesEnded.Length=["+touchesEnded.Length+"]");
//System.Diagnostics.Debug.WriteLine("\tNativeGestureHandler.onUp _touchCount=[" + _touchCount + "] _viewLocation=[" + _viewLocationAtOnDown + "]");
//gr.CancelsTouchesInView = handled;
//System.Diagnostics.Debug.WriteLine("\thandled=[" + handled + "]");
}
#pragma warning disable IDE0060 // Remove unused parameter
private int[] GetTriggeringTouches(DownUpGestureRecognizer gr, UITouch[] triggeringTouches)
#pragma warning restore IDE0060 // Remove unused parameter
{
/* remember this notation next time I trip over using blocks for expressions
* Point[] array = triggeringTouches.Select(delegate(UITouch t) {
* CGPoint cGPoint = t.LocationInView(null);
* return cGPoint.ToPoint();
* }).ToArray();
*/
var array = triggeringTouches.Select(t => t.LocationInView(null).ToPoint()).ToArray();
List <int> list = new List <int>();
for (int i = 0; i < WindowTouches.Length; i++)
{
Point t = WindowTouches[i];
if (array.Any(p => Math.Abs(p.X - t.X) < 0.1 && Math.Abs(p.Y - t.Y) < 0.1))
{
list.Add(i);
}
}
return(list.ToArray());
}
UIGestureRecognizer[] CreateGestureRecognizers()
{
var list = new List <UIGestureRecognizer>();
//if (HandlesDownUps) WE NEED TO ALWAYS MONITOR FOR DOWN TO BE ABLE TO UNDO A CANCEL
{ // commenting out if (HanglesDownUps) causes FormsDragNDrop listview to not recognize cell selections after a scroll. Why? I have no clue.
// Let's always trigger the down gesture recognizer so we can get the starting location
var downUpGestureRecognizer = new DownUpGestureRecognizer(new Action <DownUpGestureRecognizer, UITouch[]>(OnDown), new Action <DownUpGestureRecognizer, UITouch[]>(OnUp))
{
ShouldRecognizeSimultaneously = ((thisGr, otherGr) => false),
ShouldReceiveTouch = ((UIGestureRecognizer gr, UITouch touch) => !(touch.View is UIControl))
};
list.Add(downUpGestureRecognizer);
}
UILongPressGestureRecognizer uILongPressGestureRecognizer = null;
if (HandlesLongs)
{
uILongPressGestureRecognizer = new UILongPressGestureRecognizer(new Action <UILongPressGestureRecognizer>(OnLongPressed))
{
ShouldRecognizeSimultaneously = ((thisGr, otherGr) => false)
};
list.Add(uILongPressGestureRecognizer);
}
if (HandlesTaps)
{
var uITapGestureRecognizer = new UITapGestureRecognizer(new Action <UITapGestureRecognizer>(OnTapped))
{
ShouldRecognizeSimultaneously = ((thisGr, otherGr) =>
{
return(thisGr.GetType() != otherGr.GetType());
}),
ShouldReceiveTouch = ((UIGestureRecognizer gr, UITouch touch) =>
{
// these are handled BEFORE the touch call is passed to the listener.
return(!(touch.View is UIControl));
})
};
if (uILongPressGestureRecognizer != null)
{
uITapGestureRecognizer.RequireGestureRecognizerToFail(uILongPressGestureRecognizer);
}
list.Add(uITapGestureRecognizer);
}
if (HandlesPans)
{
var uIPanGestureRecognizer = new UIPanGestureRecognizer(new Action <UIPanGestureRecognizer>(OnPanned))
{
MinimumNumberOfTouches = 1,
ShouldRecognizeSimultaneously = ((thisGr, otherGr) => true)
};
list.Add(uIPanGestureRecognizer);
}
if (HandlesPinches)
{
var uIPinchGestureRecognizer = new UIPinchGestureRecognizer(new Action <UIPinchGestureRecognizer>(OnPinched))
{
ShouldRecognizeSimultaneously = ((thisGr, otherGr) => true)
};
list.Add(uIPinchGestureRecognizer);
}
if (HandlesRotates)
{
var uIRotationGestureRecognizer = new UIRotationGestureRecognizer(new Action <UIRotationGestureRecognizer>(OnRotated))
{
ShouldRecognizeSimultaneously = ((thisGr, otherGr) => true)
};
list.Add(uIRotationGestureRecognizer);
}
return(list.ToArray());
}
UIGestureRecognizer[] CreateGestureRecognizers()
{
var list = new List <UIGestureRecognizer>();
//if (HandlesDownUps) WE NEED TO ALWAYS MONITOR FOR DOWN TO BE ABLE TO UNDO A CANCEL
{ // commenting out if (HanglesDownUps) causes FormsDragNDrop listview to not recognize cell selections after a scroll. Why? I have no clue.
// Let's always trigger the down gesture recognizer so we can get the starting location
var downUpGestureRecognizer = new DownUpGestureRecognizer(new Action <DownUpGestureRecognizer, UITouch[]>(OnDown), new Action <DownUpGestureRecognizer, UITouch[]>(OnUp));
downUpGestureRecognizer.ShouldRecognizeSimultaneously = ((thisGr, otherGr) => false);
downUpGestureRecognizer.ShouldReceiveTouch = ((UIGestureRecognizer gr, UITouch touch) => !(touch.View is UIControl));
list.Add(downUpGestureRecognizer);
//downUpGestureRecognizer.ShouldReceiveTouch = (recognizer, touch) => {
// return _element.get_IgnoreChildrenTouches() ? touch.View==_view : true;
//};
}
UILongPressGestureRecognizer uILongPressGestureRecognizer = null;
if (HandlesLongs)
{
uILongPressGestureRecognizer = new UILongPressGestureRecognizer(new Action <UILongPressGestureRecognizer>(OnLongPressed));
uILongPressGestureRecognizer.ShouldRecognizeSimultaneously = ((thisGr, otherGr) => false);
list.Add(uILongPressGestureRecognizer);
//uILongPressGestureRecognizer.ShouldReceiveTouch = (recognizer, touch) => {
// return _element.get_IgnoreChildrenTouches() ? touch.View==_view : true;
//};
}
if (HandlesTaps)
{
var uITapGestureRecognizer = new UITapGestureRecognizer(new Action <UITapGestureRecognizer>(OnTapped));
uITapGestureRecognizer.ShouldRecognizeSimultaneously = ((thisGr, otherGr) =>
{
return(thisGr.GetType() != otherGr.GetType());
});
uITapGestureRecognizer.ShouldReceiveTouch = ((UIGestureRecognizer gr, UITouch touch) =>
{
// these are handled BEFORE the touch call is passed to the listener.
return(!(touch.View is UIControl));
//return touch.View == gr.View;
});
if (uILongPressGestureRecognizer != null)
{
uITapGestureRecognizer.RequireGestureRecognizerToFail(uILongPressGestureRecognizer);
}
list.Add(uITapGestureRecognizer);
//uITapGestureRecognizer.ShouldReceiveTouch = (recognizer, touch) => {
// return _element.get_IgnoreChildrenTouches() ? touch.View==_view : true;
//};
}
if (HandlesPans)
{
var uIPanGestureRecognizer = new UIPanGestureRecognizer(new Action <UIPanGestureRecognizer>(OnPanned));
uIPanGestureRecognizer.MinimumNumberOfTouches = 1;
uIPanGestureRecognizer.ShouldRecognizeSimultaneously = ((thisGr, otherGr) => true);
list.Add(uIPanGestureRecognizer);
//uIPanGestureRecognizer.ShouldReceiveTouch = (recognizer, touch) => {
// return _element.get_IgnoreChildrenTouches() ? touch.View==_view : true;
//};
}
if (HandlesPinches)
{
var uIPinchGestureRecognizer = new UIPinchGestureRecognizer(new Action <UIPinchGestureRecognizer>(OnPinched));
uIPinchGestureRecognizer.ShouldRecognizeSimultaneously = ((thisGr, otherGr) => true);
list.Add(uIPinchGestureRecognizer);
//uIPinchGestureRecognizer.ShouldReceiveTouch = (recognizer, touch) => {
// return _element.get_IgnoreChildrenTouches() ? touch.View==_view : true;
//};
}
if (HandlesRotates)
{
var uIRotationGestureRecognizer = new UIRotationGestureRecognizer(new Action <UIRotationGestureRecognizer>(OnRotated));
uIRotationGestureRecognizer.ShouldRecognizeSimultaneously = ((thisGr, otherGr) => true);
list.Add(uIRotationGestureRecognizer);
//uIRotationGestureRecognizer.ShouldReceiveTouch = (recognizer, touch) => {
// return _element.get_IgnoreChildrenTouches() ? touch.View==_view : true;
//};
}
/*
* var control = (UIView)_view.GetPropertyValue ("Control");
* if (control is UIButton)
* control.UserInteractionEnabled = !(HandlesTaps || HandlesDownUps);
*/
return(list.ToArray());
}