- l
- Current horizontal scroll origin.
- t
- Current vertical scroll origin.
- oldl
- Previous horizontal scroll origin.
- oldt
- Previous vertical scroll origin.
This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents). This is typically as a result of View.ScrollBy(int, System.Int32) or View.ScrollTo(int, System.Int32) having been called.