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[ZEST] Right Tree Layout algorithm [message #1775206]

Thu, 26 October 2017 09:52

Syamkumar Cheedela

Messages: 7
Registered: April 2011

Junior Member

I am very new to GEF/ZEST. For one of my use case i wanted to display models in graphical tree representation.

Below zest algorithms i have tried.

TreeLayoutAlgorithm is showing the diagram as below
index.php/fa/31132/0/

HorizantalTreeLayoutAlgorithm is showing the diagram as below
index.php/fa/31131/0/

But what i wanted is Right sided Tree as shown below. Can anyone hint me how to proceed here?
index.php/fa/31133/0/

Attachment: HorizantalTree.JPG
(Size: 18.73KB, Downloaded 185 times)
Attachment: Tree.jpg
(Size: 18.94KB, Downloaded 179 times)
Attachment: RightsideTree.JPG
(Size: 18.82KB, Downloaded 169 times)

[Updated on: Thu, 26 October 2017 09:54]

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Re: [ZEST] Right Tree Layout algorithm [message #1775364 is a reply to message #1775206]

Sat, 28 October 2017 11:30

Alexander Nyssen

Messages: 235
Registered: July 2009
Location: Lünen

Senior Member

I think that kind of layout is not covered by one of the existing layout algorithms. You would have to implement a custom one.

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Re: [ZEST] Right Tree Layout algorithm [message #1785398 is a reply to message #1775364]

Fri, 13 April 2018 13:22

Matthias Wienand

Messages: 163
Registered: March 2015

Senior Member

Hi Syamkumar,

in addition to Alexander proposal, you could utilise Graphviz for computing the layout (using hidden nodes, invisible edges, ranking, and subgraphs to influence the Graphviz default). You can take a look at the "DotLayoutExample" for how to delegate to Graphviz for laying out.

Apart from that, you could delegate to another layout library, e.g. Eclipse Layout Kernel (ELK), for computing the layout. There might already be an algorithm available for such a tree layout.

h2h
Matthias and Tamas

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