private void OnTouch(TouchEvent evt)
{
SparrowSharp.MouseCursor = (_useHandCursor && _enabled && evt.InteractsWith(this)) ? MouseCursor.Hand : MouseCursor.Default;
if (!_enabled)
{
return;
}
Touch touch = evt.GetTouch(this);
if (touch == null)
{
State = ButtonState.Up;
}
else if (touch.Phase == TouchPhase.Stationary)
{
State = ButtonState.Over;
}
else if (touch.Phase == TouchPhase.Began && _state != ButtonState.Down)
{
_triggerBounds = GetBounds(Stage);
_triggerBounds.Inflate(MaxDragDist, MaxDragDist);
State = ButtonState.Down;
}
else if (touch.Phase == TouchPhase.Moved)
{
var isWithinBounds = _triggerBounds.Contains(touch.GlobalX, touch.GlobalY);
if (_state == ButtonState.Down && !isWithinBounds)
{
// reset button when finger is moved too far away ...
State = ButtonState.Up;
}
else if (_state == ButtonState.Up && isWithinBounds)
{
// ... and reactivate when the finger moves back into the bounds.
State = ButtonState.Down;
}
}
else if (touch.Phase == TouchPhase.Ended && _state == ButtonState.Down)
{
State = ButtonState.Up;
Triggered?.Invoke(this, evt);
}
}
