referenceconnectioneditpart.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/ReferenceConnectionEditPart.java,v 1.2 2006/12/16 09:04:42 niegy Exp $
 * $Revision: 1.2 $
 * $Date: 2006/12/16 09:04:42 $
 *
 *==============================================================================
 *
 * Copyright (c) 2001-2006 Primeton Technologies, Ltd.
 * All rights reserved.
 * 
 * Created on 2006-11-29
 *******************************************************************************/


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

import org.eclipse.draw2d.ConnectionEndpointLocator;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.PolygonDecoration;
import org.eclipse.draw2d.PolylineConnection;
import org.eclipse.draw2d.PolylineDecoration;
import org.eclipse.draw2d.RotatableDecoration;
import org.eclipse.draw2d.geometry.PointList;

import com.primeton.studio.gef.ui.editor.AbstractGraphicalEditor;

/**
 * Referenc连线
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: ReferenceConnectionEditPart.java,v $
 * Revision 1.2  2006/12/16 09:04:42  niegy
 * 重构代码
 *
 * Revision 1.1  2006/12/05 05:18:59  niegy
 * 修改模型，增加连线的扩展点
 * 
 */
public class ReferenceConnectionEditPart extends ConnectionEditPart {
	/**
	 * @param editor
	 */
	public ReferenceConnectionEditPart(AbstractGraphicalEditor editor) {
		super(editor);
	}

	private Label srcCount, srcName, targetCount, targetName;
	private ConnectionEndpointLocator srcCountLocator, srcNameLocator, 
			targetCountLocator, targetNameLocator;
	private RotatableDecoration srcDecor, targetDecor;
	
	private PolygonDecoration createPolygonDecoration() {
		PolygonDecoration decoration = new PolygonDecoration();
		PointList decorationPointList = new PointList();
		decorationPointList.addPoint(0,0);
		decorationPointList.addPoint(-1,1);
		decorationPointList.addPoint(-2,0);
		decorationPointList.addPoint(-1,-1);
		decoration.setTemplate(decorationPointList);
		return decoration;
	}

	private PolylineDecoration createPolylineDecoration () {
		PolylineDecoration decoration = new PolylineDecoration();
		decoration.setScale(10, 5);
		return decoration;
	}

	/* (non-Javadoc)
	 * @see com.primeton.studio.gef.ui.parts.ConnectionEditPart#createFigure()
	 */
	protected IFigure createFigure() {
		// TODO Auto-generated method stub
		PolylineConnection conn = new PolylineConnection();

		// Create the endpoint locators
		srcCountLocator = new ConnectionEndpointLocator(conn, false);
		srcNameLocator = new ConnectionEndpointLocator(conn, false);
		srcNameLocator.setVDistance(-4);
		targetCountLocator = new ConnectionEndpointLocator(conn, true);
		targetNameLocator = new ConnectionEndpointLocator(conn, true);
		targetCountLocator.setVDistance(-4);
		
		//updateSourceDecoration
		srcDecor = createPolygonDecoration();
		conn.setSourceDecoration(srcDecor);
		
		//updateTargetDecoration
		targetDecor = createPolylineDecoration();
		conn.setTargetDecoration(targetDecor);
				
		//updateSourceCount
		srcCount = new Label("1..n");
		srcCount.setOpaque(true);
		conn.add(srcCount, srcCountLocator);
		
		//updateSourceName
		srcName = new Label("src");
		srcName.setOpaque(true);
		conn.add(srcName, srcNameLocator);
		
		//updateTargetCount
		targetCount = new Label("1..n");
		targetCount.setOpaque(true);
		conn.add(targetCount, targetCountLocator);
		
		//updateTargetName
		targetName = new Label("target");
		targetName.setOpaque(true);
		conn.add(targetName, targetNameLocator);
		
		return conn;
	}	
	
	
}