GdkGCValues for full
explanations of the arguments.gdkGCSetLineAttributes(object, line.width, line.style, cap.style, join.style)line.widthline.styleGdkLineStyle] the dash-style for lines.cap.styleGdkCapStyle] the manner in which the ends of lines are drawn.join.styleGdkJoinStyle] the in which lines are joined together.