Generic Function

Summary

Returns or sets the direction of a graph.

Package

capi

Signature

graph-pane-direction graph-pane => direction

(setf graph-pane-direction) direction graph-pane => direction

Arguments

graph-pane

A graph-pane .

Values

direction

One of :forwards or :backwards .

Description

The generic function graph-pane-direction returns the direction of the graph graph-pane. If the layout-function of graph-pane is :top-down or :left-right then direction is :forwards . Otherwise direction is :backwards .

The generic function (setf graph-pane-direction) maintains the dimension of the layout-function but potentially reverses its direction.

Example

(setf gp 

      (make-instance 'capi:graph-pane 

                     :layout-function :top-down))

=>

#<CAPI:GRAPH-PANE [0 items] 20603294>

(setf (capi:graph-pane-direction gp) 

      :backwards)

=>

NIL

(capi:graph-pane-layout-function gp)

=>

:TOP-DOWN

See also

graph-pane