bentcornerfigure.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/figure/BentCornerFigure.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 2006-12-5
 *******************************************************************************/


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

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.geometry.PointList;
import org.eclipse.draw2d.geometry.Rectangle;

/**
 * 实现卷角的功能
 *
 * @author niegy (mailto:[e-mail])
 */
/*
 * 修改历史
 * $Log: BentCornerFigure.java,v $
 * Revision 1.1  2006/12/08 07:04:32  niegy
 * 重构代码
 * 
 */
public class BentCornerFigure extends Figure {
	
	/**
	 * 默认的卷角大小
	 */
	protected static int DEFAULT_CORNER_SIZE = 10;

	/**
	 * 卷角大小
	 */
	private int cornerSize;

	/**
	 * 构造函数，初试化式样
	 *
	 */
	public BentCornerFigure() {
		setBackgroundColor(ColorConstants.orange);
		setForegroundColor(ColorConstants.black);
		setCornerSize(DEFAULT_CORNER_SIZE);
	}

	/**
	 * 返回卷角大小
	 * @return
	 */
	public int getCornerSize() {
		return cornerSize;
	}

	/**
	 * @see org.eclipse.draw2d.Figure#paintFigure(org.eclipse.draw2d.Graphics)
	 */
	protected void paintFigure(Graphics graphics) {
		Rectangle rect = getBounds().getCopy();

		graphics.translate(getLocation());

		// fill the note
		PointList outline = new PointList();
		
		outline.addPoint(0, 0);
		outline.addPoint(rect.width - cornerSize, 0);
		outline.addPoint(rect.width - 1, cornerSize);
		outline.addPoint(rect.width - 1, rect.height - 1);
		outline.addPoint(0, rect.height - 1);
		
		graphics.fillPolygon(outline); 
		
		// draw the inner outline
		PointList innerLine = new PointList();
		
		innerLine.addPoint(rect.width - cornerSize - 1, 0);
		innerLine.addPoint(rect.width - cornerSize - 1, cornerSize);
		innerLine.addPoint(rect.width - 1, cornerSize);
		innerLine.addPoint(rect.width - cornerSize - 1, 0);
		innerLine.addPoint(0, 0);
		innerLine.addPoint(0, rect.height - 1);
		innerLine.addPoint(rect.width - 1, rect.height - 1);
		innerLine.addPoint(rect.width - 1, cornerSize);
		
		graphics.drawPolygon(innerLine);
		
		graphics.translate(getLocation().getNegated());
	}

	/**
	 * 设置卷角大小
	 * @param newSize
	 */
	public void setCornerSize(int newSize) {
		cornerSize = newSize;
	}
}