[mcclim-devel] Drawing graphs & scaling

[Andy Hefner]

This should be fixed. Let me know if you have any further problems.

On 3/22/05, Thibault Langlois <tl at di.fc.ul.pt> wrote:
> 
> 
> Hello,
> 
> I would like to be able to scale a graph:
> 
> (defmethod plot ((object tree) stream)
> (with-scaling (stream 0.7)
> (draw-graph (list (root-node object))
> #'draw-node-colors
> :stream stream)))
> 
> where draw-graph is directly inspired from an example
> in allegro CLIM manual:
> 
> (defun draw-graph (root-nodes draw-node-function &rest keys)
> (apply #'format-graph-from-roots
> root-nodes
> #'(lambda (node s)
> (multiple-value-bind ()
> (with-output-as-presentation (s node 'node)
> (funcall draw-node-function node s))))
> #'(lambda (n)
> (if (visible-p n)
> (children n)))
> keys))
> and draw-node-colors draws a node using draw-rectangle*.
> 
> The problem is that when the scaling factor is not 1 the nodes are not
> correctly placed (although they are correctly scaled) with respect to 
> arcs.
> 
> Any ideas ?
> 
> Thanks.
> 
> Thibault
> 
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