protected override void OnAttached()
{
isCanTouch = Touch.GetIsEnabled(Element);
commandStartTap = Touch.GetStartTap(Element);
commandFinishTap = Touch.GetFinishTap(Element);
commandTap = Touch.GetTap(Element);
commandLongTap = Touch.GetLongTap(Element);
longTapLatency = Touch.GetLongTapLatency(Element);
gestureTap = new GestureTouchSam(OnTap);
gestureTap.MinimumPressDuration = 0;
gestureTap.ShouldReceiveTouch += (UIGestureRecognizer g, UITouch t) =>
{
return(true);
};
gestureTap.ShouldRecognizeSimultaneously += (UIGestureRecognizer g, UIGestureRecognizer t) =>
{
return(true);
};
if (commandLongTap != null)
{
TimerInit();
}
View.UserInteractionEnabled = true;
View.AddGestureRecognizer(gestureTap);
UpdateEffectColor();
}
public static void Preserve()
{
Touch.Preserve();
TimerPlatform.Preserve();
GestureTouchSam.Preserve();
GView.Preserve();
}
public static void Init()
{
Touch.Init();
TouchIOS.Init();
TimerPlatform.Init();
GestureTouchSam.Preserve();
GView.Preserve();
}
public GView(UIView view, GestureTouchSam gesture)
{
View = view;
Gesture = gesture;
}
internal void OnTap(UILongPressGestureRecognizer press)
{
if (View == null)
{
return;
}
var coordinate = press.LocationInView(View);
bool isInside = View.PointInside(coordinate, null);
// If this gesture detect nested TouchSam gesture
if (nestedGesture != null)
{
nestedGesture.OnTap(press);
// Detect END
if (press.State != UIGestureRecognizerState.Changed)
{
nestedGesture = null;
}
return;
}
switch (press.State)
{
case UIGestureRecognizerState.Began:
// Detect nested TouchSam gestures
var childsGestures = GetNestedTouchs(View);
foreach (var item in childsGestures)
{
if (item.Gesture == gestureTap)
{
continue;
}
var point = press.LocationInView(item.View);
if (item.View.PointInside(point, null))
{
nestedGesture = item.Gesture;
nestedGesture.OnTap(press);
return;
}
}
// Without nested TouchSam gestures
if (isCanTouch)
{
startPoint = coordinate;
StartTapExecute();
isTaped = true;
if (timer != null)
{
timer.Start(longTapLatency);
}
TapAnimation(0.3, 0, _alpha, false);
}
break;
case UIGestureRecognizerState.Changed:
if (!isInside && isTaped)
{
isTaped = false;
TapAnimation(0.3, _alpha);
FinishTapExecute();
}
else if (isTaped)
{
var diffX = Math.Abs(coordinate.X - startPoint.X);
var diffY = Math.Abs(coordinate.Y - startPoint.Y);
var maxDiff = Math.Max(diffX, diffY);
if (maxDiff > 4)
{
isTaped = false;
TapAnimation(0.3, _alpha);
FinishTapExecute();
}
}
break;
case UIGestureRecognizerState.Ended:
if (isInside && isTaped && isCanTouch)
{
if (timer == null)
{
TapExecute();
}
else
{
if (timer.IsEnabled)
{
TapExecute();
timer.Stop();
}
}
TapAnimation(0.3, _alpha);
FinishTapExecute();
}
isTaped = false;
break;
case UIGestureRecognizerState.Cancelled:
case UIGestureRecognizerState.Failed:
if (isTaped)
{
isTaped = false;
TapAnimation(0.3, _alpha);
FinishTapExecute();
}
break;
}
}
