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enforce node position n gridlayout [message #1007942]

Fri, 08 February 2013 11:06

Mokhtar Alshubei

Messages: 121
Registered: November 2011
Location: Germany

Senior Member

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

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

Fri, 08 February 2013 15:00

Zoltan Ujhelyi

Messages: 392
Registered: July 2015

Senior Member

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

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

Fri, 15 February 2013 17:56

Mokhtar Alshubei

Messages: 121
Registered: November 2011
Location: Germany

Senior Member

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

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

Sat, 16 February 2013 20:25

Zoltan Ujhelyi

Messages: 392
Registered: July 2015

Senior Member

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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