protected override void OnAttached()
{
// Get the Android View corresponding to the Element that the effect is attached to
view = Control == null ? Container : Control;
// Get access to the TouchEffect class in the .NET Standard library
TouchTracking.TouchEffect touchEffect =
(TouchTracking.TouchEffect)Element.Effects.
FirstOrDefault(e => e is TouchTracking.TouchEffect);
if (touchEffect != null && view != null)
{
formsElement = Element;
libTouchEffect = touchEffect;
// Save fromPixels function
fromPixels = view.Context.FromPixels;
tapDetector = new InternalGestureDetector
{
TapAction = motionEvent =>
{
libTouchEffect.OnTapAction(formsElement);
},
};
gestureRecognizer = new GestureDetectorCompat(view.Context, tapDetector);
// Set event handler on View
view.Touch += OnTouch;
}
}
public GestureStackLayoutRenderer()
{
_tapDetector = new InternalGestureDetector();
_tapDetector.OnTap += HandleTap;
_tapDetector.OnSwipeLeft += HandleOnSwipeLeft;
_tapDetector.OnSwipeRight += HandleOnSwipeRight;
}
public PlatformGestureEffect()
{
tapDetector = new InternalGestureDetector
{
TapAction = motionEvent =>
{
var command = tapCommand;
if (command != null)
{
var x = motionEvent.GetX();
var y = motionEvent.GetY();
var point = GetScaledCoord(x, y);
if (command.CanExecute(point))
{
command.Execute(point);
}
}
},
PanAction = (e1, e2, distanceX, distanceY) =>
{
moving = true;
var command = panCommand;
if (command != null)
{
eventArgs.StartPosition = GetScaledCoord(e1.GetX(), e1.GetY());
eventArgs.CurrentPosition = GetScaledCoord(e2.GetX(), e2.GetY());
eventArgs.StatusType = GestureStatus.Running;
eventArgs.TotalMove = GetScaledCoord(e2.GetX() - e1.GetX(), e2.GetY() - e1.GetY());
if (command.CanExecute(eventArgs))
{
command.Execute(eventArgs);
}
}
},
PanEndAction = (motionEvent) =>
{
if (!moving)
{
return;
}
var command = panCommand;
if (command != null)
{
eventArgs.CurrentPosition = GetScaledCoord(motionEvent.GetX(), motionEvent.GetY());
eventArgs.StatusType = GestureStatus.Completed;
eventArgs.TotalMove = GetScaledCoord(motionEvent.GetX() - eventArgs.StartPosition.X, motionEvent.GetY() - eventArgs.StartPosition.Y);
if (command.CanExecute(eventArgs))
{
command.Execute(eventArgs);
}
}
moving = false;
}
};
}
public TapWithPositionGestureEffect()
{
tapDetector = new InternalGestureDetector
{
TapAction = motionEvent =>
{
var tap = tapWithPositionCommand;
if (tap != null)
{
var x = motionEvent.GetX();
var y = motionEvent.GetY();
var point = PxToDp(new Point(x, y));
Log.WriteLine(LogPriority.Debug, "gesture", $"Tap detected at {x} x {y} in forms: {point.X} x {point.Y}");
if (tap.CanExecute(point))
{
tap.Execute(point);
}
}
}
};
}
public PlatformGestureEffect()
{
tapDetector = new InternalGestureDetector
{
TapAction = motionEvent =>
{
var command = tapCommand2;
if (command != null)
{
var x = motionEvent.GetX();
var y = motionEvent.GetY();
var point = PxToDp(new Point(x, y));
if (command.CanExecute(point))
{
command.Execute(point);
}
}
var handler = tapCommand;
if (handler?.CanExecute(null) == true)
{
handler.Execute(null);
}
},
DoubleTapAction = motionEvent =>
{
var command = doubleTapCommand;
if (command != null)
{
var x = motionEvent.GetX();
var y = motionEvent.GetY();
var point = PxToDp(new Point(x, y));
if (command.CanExecute(point))
{
command.Execute(point);
}
}
},
SwipeLeftAction = motionEvent =>
{
var handler = swipeLeftCommand;
if (handler?.CanExecute(null) == true)
{
handler.Execute(null);
}
},
SwipeRightAction = motionEvent =>
{
var handler = swipeRightCommand;
if (handler?.CanExecute(null) == true)
{
handler.Execute(null);
}
},
SwipeTopAction = motionEvent =>
{
var handler = swipeTopCommand;
if (handler?.CanExecute(null) == true)
{
handler.Execute(null);
}
},
SwipeBottomAction = motionEvent =>
{
var handler = swipeBottomCommand;
if (handler?.CanExecute(null) == true)
{
handler.Execute(null);
}
},
PanAction = (initialDown, currentMove) =>
{
var command = panCommand;
if (command != null)
{
var x0 = initialDown.GetX();
var y0 = initialDown.GetY();
var x = currentMove.GetX();
var y = currentMove.GetY();
var point = PxToDp(new Point(x - x0, y - y0));
if (command.CanExecute(point))
{
command.Execute(point);
}
}
},
};
}
