预熔为每个节点组设置不同的颜色

Question

I am new to prefuse and don't understand several things regarding nodes.

1. How can I get an event raised whenever a node clicked?
2. How can I group similar nodes with the same color?
3. How can I keep an extra meta-data on every node?

Its important to say that I build the graph in real-time and not loading it from any file.

Thanks, Ozrad.

Answer 1

Three answers to your three questions:

1. The best way to react on node clicks is to extend prefuse.controls.ControlAdapter and add it to the Display .
2. prefuse.action.assignment.DataColorAction assigns color based on a data field. For more advanced scenarios you can use ColorAction with predicates or extend the class DataColorAction .

3. You can add columns to the node table to store metadata. A column can also store objects if you need it:

    vg.getNodeTable().addColumn("meta", MyMetaData.class);