savescreenmidlet.java.svn-base

来自「example2 众多JAVA实例源码...学习java基础的好帮手」· SVN-BASE 代码 · 共 71 行

package opusmicro.demos.canvas;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.midlet.MIDlet;

public class SaveScreenMIDlet extends MIDlet implements CommandListener {
	private Display display = null;
	private SimpleCanvas canvas = new SimpleCanvas(true);
	private Command printCommand = new Command("Print", Command.OK, 1);

	public void startApp() {
		if ( display == null) display = Display.getDisplay(this);
		canvas.addCommand(printCommand);
		canvas.setCommandListener(this);
		display.setCurrent(canvas);
	}

	public void pauseApp() {}
	public void destroyApp(boolean unconditional) {}

	public void commandAction(Command command, Displayable displayable) {
		if(command == printCommand){
			Form form = new Form("screen");
			form.append(canvas.printMe());
			display.setCurrent(form);
		}
	}
}

class SimpleCanvas extends Canvas {
	int w;
	int h;
	private Image offImage = null;
	private boolean buffered = true;

	public SimpleCanvas(boolean _buffered) {
		buffered = _buffered;
		w = getWidth();
		h = getHeight();
		if ( buffered) offImage = Image.createImage(w, h);
	}

	protected void paint(Graphics g) {
		int color = g.getColor();
		g.setColor(0xFFFFFF);
		g.fillRect(0, 0, w, h);
		g.setColor(color);

		Graphics save = g;
		if ( offImage != null) g = offImage.getGraphics();
		// draw the offimage
		g.setColor(128, 128, 0);
		g.fillRoundRect((w - 100) / 2, (h - 60) / 2, 100, 60, 5, 3);
		g.setColor(0xffeebb);
		g.drawString("this is buffer", (w-100)/2, (h-60)/2, 0);
		// draw the offimage to the canvas
		save.drawImage(offImage, 0, 0, Graphics.TOP | Graphics.LEFT);
	}

	public Image printMe() {
		return offImage;
	}
}