imagefilefigure.java

来自「mywork是rcp开发的很好的例子」· Java 代码 · 共 57 行

package net.sf.freenote.figure;

import java.io.ByteArrayInputStream;

import org.eclipse.draw2d.AbstractBackground;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.ImageFigure;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;

import sun.misc.BASE64Decoder;
/**
 * 依据文件路径显示图片
 * @author levin
 * @since 2008-1-20 上午10:12:12
 */
public class ImageFileFigure extends ImageFigure implements FileFigure {
	private String[] fileEmbed;
	
	//缺省情况下自动缩放图片
	protected void paintFigure(Graphics graphics) {
		if (isOpaque())
			graphics.fillRectangle(getBounds());
		if (getBorder() instanceof AbstractBackground)
			((AbstractBackground) getBorder()).paintBackground(this, graphics, NO_INSETS);

		if(fileEmbed.length !=2  || fileEmbed[0] == null) return;
		Rectangle area = getClientArea();

		try {
			byte[] bytes=new BASE64Decoder().decodeBuffer(fileEmbed[1]);
			ImageData imageData = new ImageData(new ByteArrayInputStream(bytes));
			if(area.width > 0){
				imageData=imageData.scaledTo(area.width, area.height);
			}
			Image image = new Image(null,imageData);
			graphics.drawImage(image,area.x,area.y);
			image.dispose();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	@Override
	public void setSize(int w, int h) {
		super.setSize(w, h);
		repaint();
	}

	@Override
	public void setFileEmbed(String[] fileEmbed) {
		this.fileEmbed=fileEmbed;
		repaint();
	}
}