labeleditpart.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/parts/LabelEditPart.java,v 1.3 2006/12/30 02:45:04 niegy Exp $
 * $Revision: 1.3 $
 * $Date: 2006/12/30 02:45:04 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved.
 * 
 * Created on 2006-12-11
 *******************************************************************************/


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

import java.lang.reflect.Method;

import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.DirectEditPolicy;
import org.eclipse.gef.requests.DirectEditRequest;

import com.primeton.studio.gef.core.CorePackage;
import com.primeton.studio.gef.core.NodeElement;
import com.primeton.studio.gef.core.NodeElementLabel;
import com.primeton.studio.gef.ui.GefUiPluginImages;
import com.primeton.studio.gef.ui.commands.ChangeNameCommand;
import com.primeton.studio.gef.ui.editor.AbstractGraphicalEditor;
import com.primeton.studio.gef.ui.figure.NodeLabelFigure;

/**
 * TODO 此处填写 class 信息
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: LabelEditPart.java,v $
 * Revision 1.3  2006/12/30 02:45:04  niegy
 * 重构代码
 *
 * Revision 1.2  2006/12/16 09:04:42  niegy
 * 重构代码
 *
 * Revision 1.1  2006/12/12 08:26:39  niegy
 * 重构代码,实现一般图元的编辑框
 * 
 */
public class LabelEditPart extends BaseEditPart {

	NodeLabelFigure figure = null;
	/**
	 * @param editor
	 */
	public LabelEditPart(AbstractGraphicalEditor editor) {
		super(editor);
		// TODO Auto-generated constructor stub
	}

	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.parts.BaseEditPart#createDirectEditPolicy()
	 */
	protected DirectEditPolicy createDirectEditPolicy() {
		// TODO Auto-generated method stub
		return new DirectEditPolicy() {
			protected Command getDirectEditCommand(DirectEditRequest request) {
				return new ChangeNameCommand(
						getCastedModel().getNode(), (String)request.getCellEditor().getValue());
			}
			protected void showCurrentEditValue(DirectEditRequest request) {
				((Label)getFigure()).setText((String)request.getCellEditor().getValue());
				getFigure().getUpdateManager().performUpdate();
			}
		};
	}
	
	String getDirectEditText() {
		return getCastedModel().getNode().getName();
	}
	
    protected NodeElementLabel getCastedModel() {
        return ((NodeElementLabel) getModel());
    }
    
	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.parts.BaseEditPart#createEditPolicies()
	 */
	protected void createEditPolicies() {
		// TODO Auto-generated method stub
		super.createEditPolicies();
		installEditPolicy(EditPolicy.GRAPHICAL_NODE_ROLE,null);
	}
	
	private void setLayoutConstraint(int x,int width){
		x-=width;
		Rectangle bounds = new Rectangle(
                x,
                getCastedModel().getNode().getLocation().getY()+40,
                -1,
                -1);         
        ((GraphicalEditPart) getParent()).setLayoutConstraint(this, getFigure(), bounds);		   
	}
	
	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.parts.NodeEditPartEx#refreshVisuals()
	 */	
	protected void refreshVisuals() {
		// TODO Auto-generated method stub
		Label fig = (Label)getFigure();
		String displayText = "" + getCastedModel().getNode().getName();
		fig.setText(displayText);	
		((DiagramFreeformLayout)getFigure().getParent().getLayoutManager()).layoutChild(fig);		
		int x = getCastedModel().getNode().getLocation().getX()+16;
		int width = getFigure().getBounds().width/2;	
		setLayoutConstraint(x,width);	
//		try{
//			if(width==0){
//				IFigure parent = getFigure().getParent();
//				Class className = parent.getClass().getSuperclass().getSuperclass();
//				Method[] methods = className.getDeclaredMethods();
//				for (int i = 0; i < methods.length; i++) {
//					Method method = methods[i];
//					if(method.getName().equals("layout")){
//						method.setAccessible(true);
//						method.invoke(parent, null);
//						method.setAccessible(false);
//						width = getFigure().getBounds().width/2;
//						setLayoutConstraint(x,width);
//						break;
//					}
//				}
//			}
//		}
//		catch(Exception e){
//			e.printStackTrace();
//		}
	}
}