are relative to the "physical" origin of the scrolled window. If the user insert a child window at
position (10,10) and scrolls the window down 100 pixels (moving the child window out of the visible
area), the child window will report a position of (10,-90).
are relative to the "physical" origin of the scrolled window. If the user insert a child window at
position (10,10) and scrolls the window down 100 pixels (moving the child window out of the visible
area), the child window will report a position of (10,-90).