public UMLOpenArrow(CanvasGroup group)
: base(group)
{
_arrowhead = new CanvasLine (group);
_arrowhead.WidthUnits= 1.0;
_arrowhead.FillColorGdk = UMLEdge.OUTLINE_COLOR;
_arrowhead.Lower (1);
Redraw ();
_arrowhead.Show ();
}
// there's no need to specify the location, because every segment will
// be placed in the canvas in the method Redraw.
private CanvasLine CreateLine()
{
CanvasLine line = new CanvasLine (this);
line.CanvasEvent += new CanvasEventHandler (LineEventHandler);
line.FillColorGdk = OUTLINE_COLOR;
line.WidthUnits = WIDTH_UNITS;
line.Lower (1);
line.Show ();
return line;
}