public void Unsubscribe()
{
_element.ManipulationStarted -= OnManipulationStarted;
_element.ManipulationCompleted -= OnManipulationCompleted;
_element.ManipulationDelta -= OnManipulationDelta;
TouchHelper.RemoveHandlers(_element);
if (_doubleTap != null)
{
_doubleTap.Cancel();
_doubleTap = null;
}
if (_tapAndHold != null)
{
_tapAndHold.Cancel();
_tapAndHold = null;
}
if (_pressAndTap != null)
{
_pressAndTap.Cancel();
_pressAndTap = null;
}
}
private void AbortTapHold()
{
if (_tapAndHold != null)
{
_tapAndHold.Cancel();
_tapAndHold = null;
}
}
private void OnManipulationStarted(object sender, ManipulationStartedEventArgs e)
{
_fingerTaps.Clear();
Debug.WriteLine("OnManipulationStarted: ({0})", e.ManipulationOrigin);
_isTap = true;
_tapStartTimestamp = DateTime.Now.Ticks;
_tapAndHold = new FutureAction(() =>
{
if (IsTwoFingerTap())
{
RaiseEvent(sender, TwoFingerTapAndHold, new TwoFingerTapAndHoldGestureEventArgs
{
Origin = e.ManipulationOrigin
});
}
else
{
RaiseEvent(sender, TapAndHold, new TapAndHoldGestureEventArgs
{
Origin = e.ManipulationOrigin
});
}
_isTap = false;
e.Complete();
}, TapAndHoldTimeThreshold);
_pressAndTap = new FutureAction(() =>
{
if (_fingerTaps.Count == 2 && _fingerTaps[0].IsTapComplete == false && _fingerTaps[1].IsTapComplete)
{
AbortTapHold();
RaiseEvent(sender, PressAndTap, new PressAndTapGestureEventArgs
{
Origin = e.ManipulationOrigin
});
_isTap = false;
e.Complete();
}
}, PressAndTapTimeThreshold);
}
public FutureAction(FutureAction action)
{
}
private void OnManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
{
Point origin = e.ManipulationOrigin;
DateTime now = DateTime.Now;
if (_isTap)
{
AbortTapHold();
if (_waitingFor2ndTap && IsDoubleTap(_lastTapOrigin, _lastTapTimestamp, origin, now.Ticks))
{
_doubleTap.Cancel();
_doubleTap = null;
_waitingFor2ndTap = false;
RaiseEvent(sender, DoubleTap, new DoubleTapGestureEventArgs
{
Origin = origin
});
}
else
{
_waitingFor2ndTap = true;
_lastTapTimestamp = now.Ticks;
_lastTapOrigin = origin;
_doubleTap = new FutureAction(() =>
{
if (IsTwoFingerTap())
{
RaiseEvent(sender, TwoFingerTap, new TwoFingerTapGestureEventArgs
{
Origin = e.ManipulationOrigin
});
}
else
{
RaiseEvent(sender, Tap, new TapGestureEventArgs
{
Origin = e.ManipulationOrigin
});
}
},
DoubleTapTimeThreshold);
}
}
else
{
_isTap = false;
_waitingFor2ndTap = false;
}
if (e.IsInertial && ((Math.Abs(e.FinalVelocities.LinearVelocity.X) > MinimumFlickSpeed) || (Math.Abs(e.FinalVelocities.LinearVelocity.Y) > MinimumFlickSpeed)))
{
RaiseEvent(sender, Flick, new FlickGestureEventArgs
{
Origin = e.ManipulationOrigin,
Velocity = e.FinalVelocities.LinearVelocity,
FlickDirection = FlickGestureEventArgs.GetDirection(e.ManipulationOrigin, e.FinalVelocities.LinearVelocity)
});
}
_primaryTouchPoint = null;
_secondaryTouchPoint = null;
_lastPrimaryTouchPoint = null;
_lastSecondaryTouchPoint = null;
}