ungroupnodeaction.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/action/UnGroupNodeAction.java,v 1.1 2006/12/08 07:04:32 niegy Exp $
 * $Revision: 1.1 $
 * $Date: 2006/12/08 07:04:32 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved.
 * 
 * Created on 2006-12-7
 *******************************************************************************/


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

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.ui.IEditorPart;

import com.primeton.studio.gef.core.GroupNode;
import com.primeton.studio.gef.ui.Constants;
import com.primeton.studio.gef.ui.commands.UnGroupCommand;
import com.primeton.studio.gef.ui.parts.GroupNodeEditPart;

/**
 * TODO 此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: UnGroupNodeAction.java,v $
 * Revision 1.1  2006/12/08 07:04:32  niegy
 * 重构代码
 * 
 */
public class UnGroupNodeAction extends GroupNodeAction {

	/**
	 * @param editor
	 */
	public UnGroupNodeAction(IEditorPart editor) {
		super(editor);
		// TODO Auto-generated constructor stub
	}

    protected void init() {
        setId(Constants.ACTION_UNGROUP);
        setText("ungroup");
    }
    
    protected boolean calculateEnabled() {
    	  return getSelectedObjects().size() > 0 && hasGroupNodeExist();
    }
    
    private boolean hasGroupNodeExist() {
        List objects = getSelectedObjects();
        
        for (Iterator iter = objects.iterator(); iter.hasNext();) {
            Object element = (Object) iter.next();
            if (element instanceof GroupNodeEditPart) {
                return true;
            }
        }
        return false;
    }
    
    public void run() {
        List objects = getSelectedObjects();
        
        List result = new ArrayList();
        for (Iterator iter = objects.iterator(); iter.hasNext();) {
            Object element = (Object) iter.next();
            if (element instanceof GroupNodeEditPart) {
                Object groupNode = ((GroupNodeEditPart)element).getModel();
                result.add(groupNode);   
            }
        }
        
        for (Iterator iter = result.iterator(); iter.hasNext();) {
            GroupNode groupNode = (GroupNode) iter.next();
            
            UnGroupCommand command = new UnGroupCommand(getGraphicalDiagram());
            command.setGroupNode(groupNode);
            getCommandStack().execute(command);
        }
    }
}