example8.java

来自「Micro Window Toolkit(MWT)是一个用于开发J2ME用户界面」· Java 代码 · 共 128 行

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.Random;

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

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


// Custom Window

// Override the behavior of the window
class MyWindow extends Window {
	public MyWindow(int x,int y,int width,int height) {
		super(x,y,width,height);
	}
	// Now the focus may be moved with action keys instead of the key numbers
	public int getFocusAction(long key) {
		switch(Example8.canvas.getGameAction((int)key)) {
			case Canvas.FIRE:	return FOCUSACTION_FIRE;
			case Canvas.LEFT:	return FOCUSACTION_PREV;
			case Canvas.RIGHT:	return FOCUSACTION_NEXT;
			default: return FOCUSACTION_NONE;
		}
	}
	// A class can override the paint method instead of changing the skin
	protected void paint(Graphics g, Window window) {
		paintChilds(g,window); // must call this method
		g.setColor(0x000000);
		g.drawRoundRect(0,0,getWidth(),getHeight(),8,4);
	}
	// Now the focus will be moved only when the key is released
	protected void dispatchKey(long key) {
		if(key >> 32 != 0) return;
		switch(getFocusAction((int)key)) {
			case FOCUSACTION_PREV: setFocusPrevious(); break;
			case FOCUSACTION_NEXT: setFocusNext(); break;
		}
	}
}

class Canvas8 extends Canvas implements Runnable, EventListener {
	Window win = new MyWindow(20,20,100,100);	// the main window -reference-
	boolean exit;	// setted to true to finish the application
	static final int ACTION_EXIT = 0; // button's action ids
	
	// 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_EXIT: exit = true; return;
				}
				break;
			default: break;
		}
	}
	
	Canvas8() {
		win.add(new Label(4,4,60,20,"Choose"));
		win.add(new Button(20,24,60,20,"Exit 1",this,ACTION_EXIT));
		win.add(new Button(20,50,60,20,"Exit 2",this,ACTION_EXIT));
		win.add(new Button(20,76,60,20,"Exit 3",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(); }
		}
		Example8.instance.notifyDestroyed();
	}
	
	protected void paint(Graphics g) {
		g.setColor(0xFFFFFFFF);	// clear graphics
		g.fillRect(0,0,getWidth(),getHeight());
		
		Random r = new Random(); // paint the "background"
		for(int i=0; i<10 ;i++) {
			g.setColor(Math.abs(r.nextInt()));
			g.drawRect(Math.abs(r.nextInt())%128,Math.abs(r.nextInt())%128,Math.abs(r.nextInt())%128,Math.abs(r.nextInt())%128);
		}

		win.paint(g); // and paint the window...
	}
}


public class Example8 extends MIDlet {
	static MIDlet instance;
	static Canvas canvas;
	protected void startApp() throws MIDletStateChangeException {
		instance = this;
		Canvas8 c = new Canvas8();
		canvas = c;
		Display.getDisplay(this).setCurrent(c);
		new Thread(c).start();
	}
	protected void pauseApp() { }
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
}