imagetest.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 62 行

package org.jnode.test.gui;

import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.ImageObserver;

/**
 * @author epr
 */
public class ImageTest {

    static class TestComponent extends Component implements ImageObserver {

        private final Image img;

        public TestComponent() {
            super();
            img = Toolkit.getDefaultToolkit().createImage(ClassLoader.getSystemResource("/org/zaval/lw/rs/img/tree.gif"));
        }

        public void paint(Graphics g) {
            System.out.println("Paint called");
            super.paint(g);

            g.setColor(Color.green);
            g.drawRect(0, 0, getWidth(), getHeight());
            g.drawImage(img, 1, 1, this);
        }

        /**
         * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
         */
        public boolean imageUpdate(Image img, int flags, int x, int y, int w, int h) {
            System.out.println("imageUpdate " + flags + "," + x + "," + y + "," + w + "," + h);
            return super.imageUpdate(img, flags, x, y, w, h);
        }

    }

    public static void main(String[] args) throws Exception {
        final boolean loadOnly = (args.length > 0) && args[0].equalsIgnoreCase("loadOnly");

        if (!loadOnly) {
            final Frame wnd = new Frame();
            try {
                wnd.setSize(600, 400);
                wnd.add(new TestComponent());
                wnd.show();

                //Thread.sleep(5000);
                System.in.read();
            } finally {
                wnd.dispose();
            }
        }
    }
}