Customizing JGraphX

I have been using JGraphX to display some data (simple discrete graphs) and I would like to know how to do the following things with the JGraphX library:

• Make all edges unmovable but still allow the user to create an edge between two vertices
• Make all vertices and edges uneditable (they cannot edit what is displayed on them)
• How do I get the selected vertex or edge at any given time?
• Make all vertex boxes unresizable to the user
• How do I modify the colour of each vertex's box?

Thanks, ExtremeCoder

Here is an example:

mxGraph graph = new mxGraph()
{
  // Make all edges unmovable
  public boolean isCellMovable(Object cell)
  {
    return !getModel().isEdge(cell);
  }

  // Make all vertex boxes unresizable
  public boolean isCellResizable(Object cell)
  {
     return !getModel().isVertex(cell);
  }
};

// Make all vertices and edges uneditable
graph.setCellsEditable(false);

// Make all edges unbendable
graph.setCellsBendable(false);

// Get the selected vertex or edge
System.out.println(graph.getSelectionCell());

// To insert a vertex with a given color:
Object v1 = graph.insertVertex(parent, null, "Hello",
            20, 20, 80, 30, "fillColor=#FF0000;");

// To modify the color of a vertex:
graph.setCellStyles(mxConstants.STYLE_FILLCOLOR, "#00FF00", new Object[]{v1});