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Draw Graph parameters

source_path - string (``.'').

The directory where the DG tcl/tk scripts reside.

echo_commands - boolean (FALSE).

Whether to echo the tcl/tk commands on the screen or not.

canvas_width, canvas_height - integers (1000, 700).

The default width and height of the drawing canvas in pixels.

viewable_width, viewable_height - integers (600, 400).

The default viewable width and height of the drawing canvas in pixels.

interactive_mode - integer (TRUE).

Whether it is allowable to change things interactively on the canvas or not.

node_radius - integer (8).

The default radius of a displayed graph node.

disp_nodelabels, disp_nodeweights, disp_edgeweights - integers (all TRUE).

Whether to display node labels, node weights, and edge weights or not.

nodelabel_font, nodeweight_font, edgeweight_font - strings (all ``-adobe-helvetica-...'').

The default character font for displaying node labels, node weights and edge weights.

node_dash, edge_dash - strings (both empty string).

The dash pattern of the circles drawn around dashed nodes and that of dashed edges.