imagepanel.java

来自「打印管理程序,测试完全通过.windows开发环境.」· Java 代码 · 共 47 行

package jp.co.ntl.swing.ext;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Toolkit;
import javax.swing.JPanel;

/*
 * Created on 2006/06/14
 */

public class ImagePanel extends JPanel {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	private boolean loaded;
	private Image image;
	private MediaTracker tracker = new MediaTracker(this);
	
	public ImagePanel(String imagestr) {
		this.image = Toolkit.getDefaultToolkit().getImage(imagestr);
		tracker.addImage(image, 1);
		loaded = tracker.checkID(1);
	}
	
	public ImagePanel(Image image) {
		this.image = image;
		tracker.addImage(image, 1);
		loaded = tracker.checkID(1);
	}
	
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		if (!loaded) {
			try {
				tracker.waitForID(1);	
			} catch (InterruptedException e) {
			}		
		}
		
		g.drawImage(image, 0, 0, image.getWidth(this), image.getHeight(this), this);
	}
}