Determines how the end of lines are drawn.
|0||Gdk::CAP_NOT_LAST||The same as Gdk::CAP_BUTT for lines of non-zero width. For zero width lines, the final point on the line will not be drawn.|
|1||Gdk::CAP_BUTT||The ends of the lines are drawn squared off and extending to the coordinates of the end point.|
|2||Gdk::CAP_ROUND||The ends of the lines are drawn as semicircles with the diameter equal to the line width and centered at the end point.|
|3||Gdk::CAP_PROJECTING||The ends of the lines are drawn squared off and extending half the width of the line beyond the end point.|