example5.java

Micro Window Toolkit(MWT)是一个用于开发J2ME用户界面(UI)的工具包。它具有友好

package example;

/*
 * MWT - Micro Window Toolkit
 * Copyright (C) 2007 Lucas Domanico - [e-mail]
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 * 		http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 * 		http://j2me-mwt.sourceforge.net/
 */

import java.util.Calendar;
import java.util.Date;
import java.util.Random;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

import mwt.Button;
import mwt.Component;
import mwt.EventListener;
import mwt.Label;
import mwt.Skin;
import mwt.Window;


// Look and Feel
//
class Canvas5 extends Canvas implements Runnable, EventListener {
	Window win = new Window(8,8,100,100);	// the main window -reference-
	boolean exit;	// setted to true to finish the application
	static final int ACTION_BACKGROUND = 0;	// button's action ids
	static final int ACTION_BORDER = 1;
	static final int ACTION_EXIT = 2;
	final int[] winColors = {0x2033FF,0x000000,0xCCCCCC,0x000000,0x444444}; // colours for the win background
	Random r = new Random(); // will be used to change colours randomly
	
	// notify input
	protected void keyPressed(int keyCode)	{ win.setKeyState(keyCode,Window.KEYSTATE_PRESSED,true); }
	protected void keyReleased(int keyCode) { win.setKeyState(keyCode,Window.KEYSTATE_RELEASED,true); }
	
	// event listener implementation
	public void processEvent(int eventType, Component sender, Object[] args) {
		switch(eventType) {
			case EVENT_ACTION: // when a button is pressed an event action is triggered
				switch(((Button)sender).getActionType()) {
					case ACTION_BACKGROUND: winColors[0] = Math.abs(r.nextInt()); break;
					case ACTION_BORDER: winColors[2] = Math.abs(r.nextInt()); break;
					case ACTION_EXIT: exit = true; return;
				}
				win.setSkin(Window.STYLE_DEFAULT, new Skin(winColors));
				break;
			default: break;
		}
	}
	
	Canvas5() {
		// set white color as default for labels
		Label.getDefaultFont(Label.STYLE_DEFAULT).setColor(0xFFFFFF);

		// the "menu" label
		Label menu = new Label(0,6,win.getWidth(),20,"Menu");
		menu.setTextAlign(Component.ALIGN_TOP_CENTER);
		win.add(menu);
		
		// display the time
		Label time = new Label(0,20,win.getWidth(),20,"") {
			protected void paint(Graphics g, Window window) { // override paint method
				Calendar now = Calendar.getInstance();
				now.setTime(new Date());
				setText("Time " + now.get(Calendar.HOUR) + ":" + now.get(Calendar.MINUTE) + ":" + now.get(Calendar.SECOND));
				super.paint(g, window);
			}
		};
		time.setTextAlign(Component.ALIGN_TOP_CENTER);
		win.add(time);

		// change the background button (ImageSkin" defined below)
		Button background = new Button(6,50,42,20,"",this,ACTION_BACKGROUND);
		win.add(background);
		try {
			background.setSkin(Button.STYLE_DEFAULT, new ImageSkin(Image.createImage("/color_def.png")));
			background.setSkin(Button.STYLE_FOCUSED, new ImageSkin(Image.createImage("/color_foc.png")));
			background.setSkin(Button.STYLE_PRESSED, new ImageSkin(Image.createImage("/color_def.png")));
		} catch(Exception e) { e.printStackTrace(); }

		// this sets the skin and font for the last two buttons		
		Button.setDefaultSkin(Button.STYLE_DEFAULT, new Skin()); // null skin
		Button.setDefaultSkin(Button.STYLE_FOCUSED, new Skin());
		Button.setDefaultSkin(Button.STYLE_PRESSED, new Skin());
		Button.getDefaultFont(Button.STYLE_DEFAULT).setColor(0xFFFFFF);
		Button.getDefaultFont(Button.STYLE_FOCUSED).setColor(0xF8FF66);
		
		win.add(new Button(50,52,40,20,"Border",this,ACTION_BORDER));
		win.add(new Button(30,70,30,20,"Exit",this,ACTION_EXIT));
		win.setFocusFirst();
	}
	
	public void run() {
		while(!exit) { // main loop
			win.repeatKeys(true);
			repaint();
			serviceRepaints();
			try { Thread.sleep(1); }
			catch(Exception e) { e.printStackTrace(); }
		}
		Example5.instance.notifyDestroyed();
	}
	
	protected void paint(Graphics g) {
		g.setColor(0xFFFFFFFF);	// clear graphics
		g.fillRect(0,0,getWidth(),getHeight());
		win.paint(g); // and paint the window...
	}
}

// this skin displays an image and show how this class must be extended
class ImageSkin extends Skin {
	Image image;
	ImageSkin(Image image) { this.image = image; }
	
	protected void paint(Graphics g, int width, int height) { // override the paint method
		g.drawImage(image,width/2,height/2,Graphics.VCENTER|Graphics.HCENTER);
	}
	
	// override the clone and copy methods
	private ImageSkin() {}
	public Skin clone() {
		ImageSkin t = new ImageSkin();
		copy(t);
		return t;
	}
	protected void copy(ImageSkin skin) {
		super.copy(skin);
		skin.image = image;
	}
}

public class Example5 extends MIDlet {
	static MIDlet instance;
	protected void startApp() throws MIDletStateChangeException {
		instance = this;
		Canvas5 c = new Canvas5();
		Display.getDisplay(this).setCurrent(c);
		new Thread(c).start();
	}
	protected void pauseApp() { }
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
}