1.5.1 Instance variables

arrow <- fill: colour|{foreground,background}*

If not equal to @nil, the triangle is filled with this colour.

Defaults: @nil

arrow-right: point

Right-end of base.

arrow-left: point

Computed value to speed up redraw if the parameters of the arrow has not changed.

arrow <- length: num

Distance in pixels from the arrow<-tip to the baseline of the triangle. See also arrow<-wing.

arrow <- reference: point

Imaginary point where the arrow points to. Only the direction from arrow<-tip is considered; not the distance. arrow<-reference and arrow<-tip may not be at the same location.

arrow <- style: {open,closed}

If open, the baseline of the triangle is not painted.

arrow <- tip: point

Location of the arrow head. Together with arrow<-reference this determines the direction into which the arrow points.

arrow <- wing: num

Length of the baseline.