private void Update()
{
if (_mouseDown)
{
// Check for drag release
if (Input.GetMouseButtonUp(0))
{
// Touch ended; cancel tracking
_mouseDown = false;
_lastPosition = Vector3.zero;
if (DragEnded != null)
{
DragEnded.Invoke(Input.mousePosition);
}
}
else if (_lastPosition != Input.mousePosition)
{
// Touch still occuring and moved
if (DragMoved != null)
{
DragMoved.Invoke(_lastPosition - Input.mousePosition);
}
_lastPosition = Input.mousePosition;
}
}
else if (Input.GetMouseButtonDown(0))
{
// Otherwise, start tracking the first touch to begin
_lastPosition = Input.mousePosition;
_mouseDown = true;
if (DragBegan != null)
{
DragBegan.Invoke(_lastPosition);
}
}
}
public void OnBeginDrag(PointerEventData eventData)
{
DragBegan?.Invoke(eventData, gameObject);
}
