return "Context: extents = " + extents
return "Context: extents = " + "("+extents.x+","+extents.y+") -> ("+extents.width+"x"+extents.height+")"
    public String toString() {        return "Context: extents = " + extents //" cursor = " + cursor +                //"\n color = " + color + " background color = " + background_color;                + " offset = " + xoff + "," + yoff                ;    }