copynodeaction.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/CopyNodeAction.java,v 1.5 2006/12/30 02:45:04 niegy Exp $
 * $Revision: 1.5 $
 * $Date: 2006/12/30 02:45:04 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved. 
 * 
 * Created on 2006-9-27
 *******************************************************************************/

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

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

import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.ui.actions.Clipboard;
import org.eclipse.gef.ui.actions.EditorPartAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.internal.WorkbenchImages;

import com.primeton.studio.gef.core.GroupNode;
import com.primeton.studio.gef.core.NodeElement;
import com.primeton.studio.gef.core.NodeElementLabel;
import com.primeton.studio.gef.core.TNodeType;

/**
 * TODO此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: CopyNodeAction.java,v $
 * Revision 1.5  2006/12/30 02:45:04  niegy
 * 重构代码
 *
 * Revision 1.4  2006/12/29 09:07:10  niegy
 * 禁止拷贝组合图元
 *
 * Revision 1.3  2006/12/12 08:26:39  niegy
 * 重构代码,实现一般图元的编辑框
 *
 * Revision 1.2  2006/12/05 05:18:59  niegy
 * 修改模型，增加连线的扩展点
 *
 * Revision 1.1  2006/11/17 03:15:13  niegy
 * create
 * 
 */
public class CopyNodeAction extends EditorPartAction implements
        ISelectionChangedListener {
	/* Editor Model List */
    protected List selecteds;

    /* Selection Object*/
    protected IStructuredSelection selection;
    
    /**
     * @param editor
     */
    public CopyNodeAction(IEditorPart editor) {
        super(editor);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
     */
    public void selectionChanged(SelectionChangedEvent event) {
    	selecteds = getSelection(event);
        refresh();
    }

    public  List getSelection(SelectionChangedEvent event) {
        // TODO Auto-generated method stub
        List selecteds = null;
        ISelection s = event.getSelection();
        if (!(s instanceof IStructuredSelection))
            return null;
        
        selection = (IStructuredSelection) s;
        if (selection != null) {
            selecteds = new ArrayList();
            for (int i = 0; i < selection.size(); i++) {
                Object obj = selection.toList().get(i);
                
                Object model = ((EditPart) obj).getModel();
                if (!(model instanceof NodeElement)) {
                    selecteds = null;
                    break;
                }
                if(!(model instanceof NodeElementLabel))
                		selecteds.add(model);   
            }
        }
        return selecteds;
    }
    
    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
     */
    protected boolean calculateEnabled() {
        boolean flag = (selecteds != null) && (selecteds.size() > 0);
        boolean isExistCopynotNode = false;
        if(flag){
        	for (Iterator iter = selecteds.iterator(); iter.hasNext();) {
				NodeElement element = (NodeElement) iter.next();
				if(element instanceof GroupNode)
					return false;
				if(element.isGrouped())
					return false;
				if(element.getNodeType()==TNodeType.ATTRICOLUMN_LITERAL ||
						element.getNodeType()==TNodeType.OPERATIONCOLUMN_LITERAL)
					isExistCopynotNode = true;
			}
        }
        return (flag && !isExistCopynotNode);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.action.IAction#run()
     */
    public void run() {
  	
    	if (selecteds != null && selecteds.size() > 0)
    		Clipboard.getDefault().setContents(EcoreUtil.copyAll(selecteds));
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#init()
     */
    protected void init() {
        setId(ActionFactory.COPY.getId());
        setText("Copy");  //$NON-NLS-1$
        setImageDescriptor(WorkbenchImages
                .getImageDescriptor(ISharedImages.IMG_TOOL_COPY));
        setDisabledImageDescriptor(WorkbenchImages
                .getImageDescriptor(ISharedImages.IMG_TOOL_COPY_DISABLED));
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.Disposable#dispose()
     */
    public void dispose() {
        selecteds = null;
    }
}