Gets the offset of the character located at coordinates @x and @y. @x and @y are interpreted as being relative to the screen or this widget's window depending on @coords.
screen x-position of character
screen y-position of character
specify whether coordinates are relative to the screen or widget window
the offset to the character which is located at the specified @x and @y coordinates of -1 in case of failure.
See Implementation
Gets the offset of the character located at coordinates @x and @y. @x and @y are interpreted as being relative to the screen or this widget's window depending on @coords.