Graph with different node size

[yinglcs]

I am trying to use the layout algorithm in GVF for my own graph. I only need to layout algoritm to calculate the co-ordinates of each node in the graph and I will display them myself. 

So I subclass the layout algorithm in GVF and over load the getSize() method so that it can take into the account of different node sizes in my graph, instead of create a NodeSize() with defaultSize.

And I check the ReingoldTilford algorithm in GVF, it does call getWidth() and getHeight() to account to different node size during layout.

But after I did this, there are still overlap in the graph hort. and the y-coordinate never get adjust (it always return 1.0, 2.0, 3.0, but the height is 69, 35, 30).

Could you please tell me what did I miss?

public class MyReingoldTilford extends ReingoldTilford {
   
   
    public NodeSize getSize(Node node, Graph graph) {
        NodeSize nodeSize = (NodeSize)sizeMap.get(node, graph);
        if (nodeSize == null) {     
          if (node instanceof MyLayoutNode) {
            MyLayoutNode myNode = (MyLayoutNode) node;
            nodeSize = new NodeSize(myNode.getSize().width, myNode.getSize().height);
          } else {
          nodeSize = new NodeSize(getDefaultNodeSize(), getDefaultNodeSize());
          } 
          sizeMap.put(node, graph, nodeSize);
        }
        return nodeSize;
      }
}

[yinglcs]

Here is what I do to build the graph:
1. I create a source node and a target node (target Node of the src node). and Mynode is just a child class of the node
2. I add targetNode as the successor of the srcNode
3. I create an edge for the connection between sourceNode and targetNode.
4. I add both nodes to the graph.

Do I miss something? I see there are over-lapping in the graph.

// Inside a loop
MyNode srcNode = new MyNode();
MyNode targetNode = new MyNode();

srcNode.addSuccessor(targetNode, graph);
    
royere.cwi.structure.Edge edge = new royere.cwi.structure.Edge(srcNode, targetNode);
    edge.setProperty(Keys.ISDIRECTED, Boolean.TRUE);

srcNode.addOutgoingEdge(edge, graph);