async Task InvokeSwipe(CancellationToken cancellationToken)
{
try
{
await Task.Delay(100);
if (!cancellationToken.IsCancellationRequested)
{
if (SwipeRight)
{
SwipedRight?.Invoke(this, null);
}
else if (SwipeLeft)
{
SwipedLeft?.Invoke(this, null);
}
else
{
SmoothScrollTo(((View)Parent).Width, 0);
}
}
}
catch (TaskCanceledException ex)
{
}
catch (Exception ex)
{
}
}
public SwipeGestureRecognizer()
{
PanUpdated += (_, e) =>
{
if (e.StatusType == GestureStatus.Running)
{
translatedX = e.TotalX;
translatedY = e.TotalY;
}
else if (e.StatusType == GestureStatus.Completed)
{
if (translatedX < 0 && Math.Abs(translatedX) > Math.Abs(translatedY))
{
SwipedLeft?.Invoke();
}
else if (translatedX > 0 && translatedX > Math.Abs(translatedY))
{
SwipedRight?.Invoke();
}
else if (translatedY < 0 && Math.Abs(translatedY) > Math.Abs(translatedX))
{
SwipedUp?.Invoke();
}
else if (translatedY > 0 && translatedY > Math.Abs(translatedX))
{
SwipedDown?.Invoke();
}
}
};
}
public override bool OnFling(MotionEvent?e1, MotionEvent?e2, float velocityX, float velocityY)
{
var result = false;
if (e1 == null || e2 == null)
{
return(result);
}
try
{
var diffY = e2.GetY() - e1.GetY();
var diffX = e2.GetX() - e1.GetX();
if (Math.Abs(diffX) > Math.Abs(diffY))
{
if (Math.Abs(diffX) > SwipeThreshold && Math.Abs(velocityX) > SwipeVelocityThreshold)
{
if (diffX > 0)
{
SwipedRight?.Invoke(this, EventArgs.Empty);
}
else
{
SwipedLeft?.Invoke(this, EventArgs.Empty);
}
result = true;
}
}
else if (Math.Abs(diffY) > SwipeThreshold && Math.Abs(velocityY) > SwipeVelocityThreshold)
{
if (diffY > 0)
{
SwipedBottom?.Invoke(this, EventArgs.Empty);
}
else
{
SwipedTop?.Invoke(this, EventArgs.Empty);
}
result = true;
}
}
catch (Exception exception)
{
System.Diagnostics.Debug.WriteLine(exception);
}
return(result);
}
private void SwipeRelativeLayout_ScrollStopped(object sender, EventArgs e)
{
var scroll = (SwipeLayout)sender;
if (scroll.ScrollX < scroll.Width / 2)
{
//swiperight
SwipedRight?.Invoke(sender, e);
}
else if (scroll.ScrollX > scroll.Width * 1.5)
{
//swipeleft
SwipedLeft?.Invoke(sender, e);
}
}
protected virtual void OnSwipedLeft(double x, double y) => SwipedLeft?.Invoke(this, new SwipedEventArgs(_view, x, y));
public void OnSwipeLeft() => SwipedLeft?.Invoke(this, EventArgs.Empty);
public void RaiseSwipedLeft()
{
SwipedLeft?.Invoke(this, new EventArgs());
}