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From Luca Furini <lfur...@cs.unibo.it>
Subject Re: Error message: "Should be first"
Date Tue, 11 Jul 2006 13:34:40 GMT
I've had another look at this.

A few debug outputs shows that the "error" arises when trying to remove 
the node <KnuthNode at 734 4527603+682968-135942 line:10 prev:687 
dem:11527.971465493918> while the list of active nodes contains

  <KnuthNode at 734 4527603+682968-135942 line:10 prev:683
  <KnuthNode at 734 4527603+682968-135942 line:10 prev:687

This removal, however, happens at the end of the algorithm, when the best 
layout is chosen (just like Vincent pointed out), and in this situation a 
node could be rightly be removed even if it's not the first one.

We could maybe add a boolean parameter to removeNode(), stating whether it 
is allowed to remove the nodes out of order or not, and only the calls in 
filterActiveNodes() would have it "true".



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