element.java

基于eclipse的工具开发代码

package com.cownew.uidesigner.model;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;

abstract public class Element implements Serializable
{

	static final long serialVersionUID = 1;

	transient protected PropertyChangeSupport listeners = new PropertyChangeSupport(
			this);

	public void addPropertyChangeListener(PropertyChangeListener listener)
	{
		listeners.addPropertyChangeListener(listener);
	}

	protected void firePropertyChange(String prop, Object old, Object newValue)
	{
		listeners.firePropertyChange(prop, old, newValue);
	}

	protected void fireStructureChange(String prop, Object child)
	{
		listeners.firePropertyChange(prop, null, child);
	}

	private void readObject(ObjectInputStream in) throws IOException,
			ClassNotFoundException
	{
		in.defaultReadObject();
		listeners = new PropertyChangeSupport(this);
	}

	public void removePropertyChangeListener(PropertyChangeListener listener)
	{
		listeners.removePropertyChangeListener(listener);
	}

}