private void OnTouch(object sender, SKTouchEventArgs e)
{
// Save time, when the event occures
long ticks = DateTime.Now.Ticks;
var location = GetScreenPosition(e.Location);
if (e.ActionType == SKTouchAction.Pressed)
{
_firstTouch = location;
_touches[e.Id] = new TouchEvent(e.Id, location, ticks);
_velocityTracker.Clear();
// Do we have a doubleTapTestTimer running?
// If yes, stop it and increment _numOfTaps
if (_doubleTapTestTimer != null)
{
_doubleTapTestTimer.Dispose();
_doubleTapTestTimer = null;
_numOfTaps++;
}
else
{
_numOfTaps = 1;
}
e.Handled = OnTouchStart(_touches.Select(t => t.Value.Location).ToList());
}
if (e.ActionType == SKTouchAction.Released)
{
// Delete e.Id from _touches, because finger is released
var releasedTouch = _touches[e.Id];
_touches.Remove(e.Id);
double velocityX;
double velocityY;
(velocityX, velocityY) = _velocityTracker.CalcVelocity(e.Id, ticks);
// Is this a fling or swipe?
if (_touches.Count == 0)
{
if (velocityX > 10000 || velocityY > 10000)
{
// This was the last finger on screen, so this is a fling
e.Handled = OnFlinged(velocityX, velocityY);
}
// Do we have a tap event
if (releasedTouch == null)
{
e.Handled = false;
return;
}
// While tapping on screen, there could be a small movement of the finger
// (especially on Samsungs). So check, if touch start location isn't more
// than 2 pixels away from touch end location.
var isAround = Math.Abs(releasedTouch.Location.X - _firstTouch.X) < 2 && Math.Abs(releasedTouch.Location.Y - _firstTouch.Y) < 2;
// If touch start and end is in the same area and the touch time is shorter
// than longTap, than we have a tap.
if (isAround && ticks - releasedTouch.Tick < (e.DeviceType == SKTouchDeviceType.Mouse ? shortClick : longTap) * 10000)
{
// Start a timer with timeout delayTap ms. If than isn't arrived another tap, than it is a single
_doubleTapTestTimer = new System.Threading.Timer((l) =>
{
if (_numOfTaps > 1)
{
if (!e.Handled)
{
e.Handled = OnDoubleTapped(location, _numOfTaps);
}
}
else
if (!e.Handled)
{
e.Handled = OnSingleTapped((Geometries.Point)l);
}
_numOfTaps = 1;
if (_doubleTapTestTimer != null)
{
_doubleTapTestTimer.Dispose();
}
_doubleTapTestTimer = null;
}, location, UseDoubleTap ? delayTap : 0, -1);
}
else if (releasedTouch.Location.Equals(_firstTouch) && ticks - releasedTouch.Tick >= longTap * 10000)
{
if (!e.Handled)
{
e.Handled = OnLongTapped(location);
}
}
}
if (_touches.Count == 1)
{
e.Handled = OnTouchStart(_touches.Select(t => t.Value.Location).ToList());
}
if (!e.Handled)
{
e.Handled = OnTouchEnd(_touches.Select(t => t.Value.Location).ToList(), releasedTouch.Location);
}
}
if (e.ActionType == SKTouchAction.Moved)
{
_touches[e.Id] = new TouchEvent(e.Id, location, ticks);
if (e.InContact)
{
_velocityTracker.AddEvent(e.Id, location, ticks);
}
if (e.InContact && !e.Handled)
{
e.Handled = OnTouchMove(_touches.Select(t => t.Value.Location).ToList());
}
else
{
e.Handled = OnHovered(_touches.Select(t => t.Value.Location).FirstOrDefault());
}
}
if (e.ActionType == SKTouchAction.Cancelled)
{
_touches.Remove(e.Id);
}
if (e.ActionType == SKTouchAction.Exited)
{
}
if (e.ActionType == SKTouchAction.Entered)
{
}
}
private void OnTouch(object sender, SKTouchEventArgs e)
{
// Save time, when the event occures
long ticks = DateTime.Now.Ticks;
var location = GetScreenPosition(e.Location);
// Get finger/handler for this event
if (!_fingers.Keys.Contains(e.Id))
{
if (_fingers.Count < 10)
{
_fingers.Add(e.Id, _fingers.Count);
}
}
var id = _fingers[e.Id];
if (e.ActionType == SKTouchAction.Pressed)
{
_firstTouch = location;
_touches[id] = new TouchEvent(id, location, ticks);
_velocityTracker.Clear();
// Do we have a doubleTapTestTimer running?
// If yes, stop it and increment _numOfTaps
if (_doubleTapTestTimer != null)
{
_doubleTapTestTimer.Dispose();
_doubleTapTestTimer = null;
_numOfTaps++;
}
else
{
_numOfTaps = 1;
}
e.Handled = OnTouchStart(_touches.Select(t => t.Value.Location).ToList());
}
if (e.ActionType == SKTouchAction.Released)
{
// Delete e.Id from _fingers, because finger is released
_fingers.Remove(e.Id);
double velocityX;
double velocityY;
(velocityX, velocityY) = _velocityTracker.CalcVelocity(id, ticks);
// Is this a fling or swipe?
if (velocityX > 10000 || velocityY > 10000)
{
System.Diagnostics.Debug.WriteLine($"Velocity X = {velocityX}, Velocity Y = {velocityY}");
e.Handled = OnFlinged(velocityX, velocityY);
}
// Do we have a tap event
if (_touches.Count == 0 || _touches[id] == null)
{
e.Handled = false;
return;
}
if (_touches[id].Location.Equals(_firstTouch) && ticks - _touches[id].Tick < (e.DeviceType == SKTouchDeviceType.Mouse ? shortClick : longTap) * 10000)
{
// Start a timer with timeout delayTap ms. If than isn't arrived another tap, than it is a single
_doubleTapTestTimer = new System.Threading.Timer((l) =>
{
if (_numOfTaps > 1)
{
if (!e.Handled)
{
e.Handled = OnDoubleTapped(location, _numOfTaps);
}
}
else
if (!e.Handled)
{
e.Handled = OnSingleTapped((Geometries.Point)l);
}
_numOfTaps = 1;
if (_doubleTapTestTimer != null)
{
_doubleTapTestTimer.Dispose();
}
_doubleTapTestTimer = null;
}, location, UseDoubleTap ? delayTap : 0, -1);
}
else if (_touches[id].Location.Equals(_firstTouch) && ticks - _touches[id].Tick >= longTap * 10000)
{
if (!e.Handled)
{
e.Handled = OnLongTapped(location);
}
}
var releasedTouch = _touches[id];
_touches.Remove(id);
if (!e.Handled)
{
e.Handled = OnTouchEnd(_touches.Select(t => t.Value.Location).ToList(), releasedTouch.Location);
}
}
if (e.ActionType == SKTouchAction.Moved)
{
_touches[id] = new TouchEvent(id, location, ticks);
if (e.InContact)
{
_velocityTracker.AddEvent(id, location, ticks);
}
if (e.InContact && !e.Handled)
{
e.Handled = OnTouchMove(_touches.Select(t => t.Value.Location).ToList());
}
else
{
e.Handled = OnHovered(_touches.Select(t => t.Value.Location).FirstOrDefault());
}
}
}
