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CompoundDirectedGraphLayout and node orientation [message #246919]

Tue, 20 January 2009 11:26

Eclipse User

Dear GEF/Draw2D gurus,

I have studied the org.eclipse.gef.examples.flow and it does an automatic
layout of nodes vertically, except for different "branches" which are laid
out horizontally.

Node1
|
Node2------Node4
| |
Node3 Node5
|
Node6

I've seen that the class responsible for this is
CompoundDirectedGraphLayout.

I need just the opposite behaviour:

nodes arranged horizontally, and "branches" vertically

Node1 -- Node2 -- Node3 -- Node6
|
+------Node4 -- Node5

Is this easily possible?
There is no much doc about this, so any indication would be very useful.
Thanks in advance for any hint.

David

Re: CompoundDirectedGraphLayout and node orientation [message #246925 is a reply to message #246919]

Tue, 20 January 2009 12:03

Eclipse User

I answer myself:

compoundDirectedGraph.setDirection(PositionConstants.EAST);

I have now only to fix the origin and destination anchor points of the
edges.

Horizontal edges go from the top left corner of the source node (at the
left) to the bottom left of the target node (at the right), so the line is
not fully horizontal but sloped downwards.

Any idea please?

David Pérez wrote:

> Dear GEF/Draw2D gurus,

> I have studied the org.eclipse.gef.examples.flow and it does an automatic
> layout of nodes vertically, except for different "branches" which are laid
> out horizontally.

> Node1
> |
> Node2------Node4
> | |
> Node3 Node5
> |
> Node6

> I've seen that the class responsible for this is
> CompoundDirectedGraphLayout.

> I need just the opposite behaviour:

> nodes arranged horizontally, and "branches" vertically

> Node1 -- Node2 -- Node3 -- Node6
> |
> +------Node4 -- Node5

> Is this easily possible?
> There is no much doc about this, so any indication would be very useful.
> Thanks in advance for any hint.

> David

Re: CompoundDirectedGraphLayout and node orientation [message #246966 is a reply to message #246925]

Wed, 21 January 2009 09:32

Eclipse User

If necessary I can provide a screenshot.

David Pérez wrote:

> I have now only to fix the origin and destination anchor points of the
> edges.

> Horizontal edges go from the top left corner of the source node (at the
> left) to the bottom left of the target node (at the right), so the line is
> not fully horizontal but sloped downwards.

> Any idea please?

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