This module draws the operations of an xdot graph using Cairo and Pango on a Gtk canvas.
|:: Eq t|
|=> Object t|
id of the node to highlight
dimensions of the graph, as returned by
|-> [(Object t, Operation)]|
operations, as returned by
|-> Render [(Object t, Rectangle)]|
dimensions of the rendered nodes on the screen
Draw an xdot graph, possibly highlighting a node.