Re: nodePosition(Graph, String) returns (0,0,0)

[guilhelm savin <guilhelm.savin AT gmail.com>]

Hi Zacharie,

Coordinates are stored on the GraphicGraph, not on your Graph object.

So, you have these alternatives :

- you can use the graphic graph of your viewer

- you have to redirect attribute modifications happening on the graphic graph to your own graph

For the first solution, here is an example :

| 

| Graph g = new AdjacencyListGraph("g");

| g.addNode("A");

| g.addNode("B");

| g.addEdge("AB", "A", "B");

| 

| Viewer v = g.display(true);

| 

| Thread.sleep(1000);

| 

| double[] d = org.graphstream.ui.graphicGraph.GraphPosLengthUtils.nodePosition(v.getGraphicGraph(),"A");

| System.out.println(d[0] + ", " + d[1] + ", " + d[2]);

| 

And for the second (this is a draft example) :

| 

| Graph g = new AdjacencyListGraph("g");

| g.addNode("A");

| g.addNode("B");

| g.addEdge("AB", "A", "B");

| 

| Viewer v = g.display(true);

|

| v.enableXYZfeedback(true);

| v.getGraphicGraph().addAttributeSink(g);

| 

| Thread.sleep(1000);

| 

| double[] d = org.graphstream.ui.graphicGraph.GraphPosLengthUtils.nodePosition(g,"A");

| System.out.println(d[0] + ", " + d[1] + ", " + d[2]);

| 

Regards.

2012/9/12 Zacharie ALES <zacharie.ales AT gmail.com>

Hello,

I recently switched to the nightly build version. Everything works fine except the nodePosition function that I am using to center the view on one specific node. 

An exemple : 

    public void centerView(String id)
    double[] d = org.graphstream.ui.graphicGraph.GraphPosLengthUtils.nodePosition(myGraph,id);
    System.out.println(d[0] + ", " + d[1] + ", " + d[2]);  // Display "position : 0.0, 0.0, 0.0"
    }

I checked the id and it is correct (myGraph.getNode(id) == null returns false). Is it a bug or do I miss something ?

Thanks in advance for your help.

--

Zacharie ALES.

--
Guilhelm Savin
PhD Student of Computer Science

LITIS, University of Le Havre
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