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enforce node position n gridlayout [message #1007942]

Fri, 08 February 2013 06:06

Eclipse User

Hello all,

Could you help me as how to enforce the position of a certain node in a certain column and row (i.e. cell) in a GridlayoutAlgoritm?

I had got valuable help [message #1007779]

Thanks,
Mok

Re: enforce node position n gridlayout [message #1008004 is a reply to message #1007942]

Fri, 08 February 2013 10:00

Eclipse User

Hi,

The algorithm does not support direct positioning. However, by ordering the nodes using a comparator it might be possible to put each element to its space. If not, than you have to implement your own changes - that should not be too hard.

Cheers,
Zoltán

Re: enforce node position n gridlayout [message #1009786 is a reply to message #1008004]

Fri, 15 February 2013 12:56

Eclipse User

Hi,
i set a comparator to my gridlayout algo object like this:

public void customizeLayout(ArrayList<ResultsVersion> resultsVersions) {
		EvolutionGridLayoutAlgo glayoutAlg = new EvolutionGridLayoutAlgo(resultsVersions);
		glayoutAlg.setComparator(new Comparator<CandidateNode>() {
			
			@Override
			public int compare(CandidateNode o1, CandidateNode o2) {
				String id1 = o1.getCandidate().getIdentity();
				String id2 = o2.getCandidate().getIdentity();
				
			      return id1.compareTo(id2);
			}
		});
		setLayoutAlgorithm(glayoutAlg, true);
	}

but i am still missing something as it didn't work. Is this the way you set a comparator? the

CandidateNode

class extends GraphNode. Should I rather make my CandidateNode implements Comparable and the rest is automatically doable by the grid logic itsef?
thank you,
Mok

Re: enforce node position n gridlayout [message #1010185 is a reply to message #1009786]

Sat, 16 February 2013 15:25

Eclipse User

Hi,

it seems I wasn't clear about my intentions with the comparator. I was asking to try to use the GraphViewer#setComparator method, as it will order the nodes before they are added to the algorithm (at least if I am not mistaken).

Of course, a layout algorithm may also offer a comparator support, but in that case it is their responsibility to handle the data. The GridLayoutAlgorithm does not do this, but relies on the external ordering created by the GraphViewer before.

I hope, it will work now.

Cheers,
Zoltán

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