modelchangenotifer.java

对eclipse gef进行封装,可以生成图形化编辑器

/*******************************************************************************
 * $Header: /cvsroot/EOS6/work_dir/niegy/com.primeton.studio.gef.ui/src/com/primeton/studio/gef/ui/commands/ModelChangeNotifer.java,v 1.1 2006/11/17 03:15:13 niegy Exp $
 * $Revision: 1.1 $
 * $Date: 2006/11/17 03:15:13 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved. 
 * 
 * Created on 2006-10-30
 *******************************************************************************/


package com.primeton.studio.gef.ui.commands;

import java.util.Iterator;
import java.util.LinkedList;

import com.primeton.studio.gef.ui.properties.IModelViewChangedListener;

/**
 * TODO此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: ModelChangeNotifer.java,v $
 * Revision 1.1  2006/11/17 03:15:13  niegy
 * create
 * 
 */
public class ModelChangeNotifer {
    private LinkedList modelModifyListener;
    private static ModelChangeNotifer Instance = null;

    private ModelChangeNotifer()
    {
        modelModifyListener = new LinkedList();
    }

    public static ModelChangeNotifer getInstance()
    {
        if(Instance == null)
            Instance = new ModelChangeNotifer();
        return Instance;
    }

    public void addModelModifyListener(IModelViewChangedListener listener)
    {
        modelModifyListener.add(listener);
    }

    public void removeModelModifyListener(IModelViewChangedListener listener)
    {
        modelModifyListener.remove(listener);
    }

    public void fireModelChange()
    {
        IModelViewChangedListener listener;
        for(Iterator it = modelModifyListener.iterator(); it.hasNext(); listener.modelChange())
            listener = (IModelViewChangedListener)it.next();

    }

    public void fireExpandView(Object parent)
    {
        IModelViewChangedListener listener;
        for(Iterator it = modelModifyListener.iterator(); it.hasNext(); listener.expandView(parent))
            listener = (IModelViewChangedListener)it.next();

    }

}