diagramtreeeditpart.java

GEF初学者可以用来对照的小例子

/*
 * Created on 2005-1-25
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package com.example.parts;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.List;

import org.eclipse.gef.editparts.AbstractTreeEditPart;

import com.example.model.Diagram;

/**
 * @author zhanghao
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class DiagramTreeEditPart extends AbstractTreeEditPart implements PropertyChangeListener{
    public DiagramTreeEditPart(Object model) {
        super(model);
     }

    public void propertyChange(PropertyChangeEvent evt) {
        refreshChildren();
    }
    public void activate() {
        super.activate();
        ((Diagram) getModel()).addPropertyChangeListener(this);
    }
    public void deactivate() {
        super.deactivate();
        ((Diagram) getModel()).removePropertyChangeListener(this);
    }
    protected List getModelChildren() {
        return ((Diagram) getModel()).getNodes();
    }
}