example14.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.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.Font;
import mwt.Label;
import mwt.Window;



class BasicTextBox extends Component {
	final StringBuffer text = new StringBuffer();
	int cursor = 0;
	int cursorWait;
	static private int CURSOR_WAIT = 10;
	static private int[] CURSOR_COLOR = {0xA1C632, 0xCFFF40};
	int cursorColor;
	final Font font;
	
	public BasicTextBox(int x, int y, int w, int h, Font font) {
		super(x,y,w,h,false);
		this.font = font;
	}

	protected boolean keyEvent(long key, Window window) {
		if((key >> 32) != 0) return true; // if key is not released return
		
		if(cursor == text.length()) text.append(' '); // new char (blank)
		
		int keycode = (int) key;
		switch(Example14.canvas.getGameAction(keycode)) { // move cursor
		case Canvas.RIGHT: cursor++; return true;
		case Canvas.LEFT: if(cursor > 0) cursor--; return true;
		}
		
		// set char
		char c = text.charAt(cursor);
		switch(keycode) {
		case Canvas.KEY_POUND:
		case Canvas.KEY_STAR:
			if(text.length() > 0) {
				text.deleteCharAt(cursor);
				if(cursor > 0) cursor--;
			}
			return true;
		case Canvas.KEY_NUM0:
			if(!Character.isDigit(c) || c == '9') c = '0';
			else c++;
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM2:
			switch(c) {
			case 'a': c = 'b'; break;
			case 'b': c = 'c'; break;
			case 'c': c = 'A'; break;
			case 'A': c = 'B'; break;
			case 'B': c = 'C'; break;
			default:
			case 'C': c = 'a'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM3:
			switch(c) {
			case 'd': c = 'e'; break;
			case 'e': c = 'f'; break;
			case 'f': c = 'D'; break;
			case 'D': c = 'E'; break;
			case 'E': c = 'F'; break;
			default:
			case 'F': c = 'd'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM4:
			switch(c) {
			case 'g': c = 'h'; break;
			case 'h': c = 'i'; break;
			case 'i': c = 'G'; break;
			case 'G': c = 'H'; break;
			case 'H': c = 'I'; break;
			default:
			case 'I': c = 'g'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM5:
			switch(c) {
			case 'j': c = 'k'; break;
			case 'k': c = 'l'; break;
			case 'l': c = 'J'; break;
			case 'J': c = 'K'; break;
			case 'K': c = 'L'; break;
			default:
			case 'L': c = 'j'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM6:
			switch(c) {
			case 'm': c = 'n'; break;
			case 'n': c = 'o'; break;
			case 'o': c = 'M'; break;
			case 'M': c = 'N'; break;
			case 'N': c = 'O'; break;
			default:
			case 'O': c = 'm'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM7:
			switch(c) {
			case 'p': c = 'q'; break;
			case 'q': c = 'r'; break;
			case 'r': c = 's'; break;
			case 's': c = 'P'; break;
			case 'P': c = 'Q'; break;
			case 'Q': c = 'R'; break;
			case 'R': c = 'S'; break;
			default:
			case 'S': c = 'p'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM8:
			switch(c) {
			case 't': c = 'u'; break;
			case 'u': c = 'v'; break;
			case 'v': c = 'T'; break;
			case 'T': c = 'U'; break;
			case 'U': c = 'V'; break;
			default:
			case 'V': c = 't'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		case Canvas.KEY_NUM9:
			switch(c) {
			case 'w': c = 'x'; break;
			case 'x': c = 'y'; break;
			case 'y': c = 'z'; break;
			case 'z': c = 'W'; break;
			case 'W': c = 'X'; break;
			case 'X': c = 'Y'; break;
			case 'Y': c = 'Z'; break;
			default:
			case 'Z': c = 'w'; break;
			}
			text.setCharAt(cursor, c);
			return true;
		}
		
		return false;
	}
	
	protected void paint(Graphics g, Window window) {
		boolean focused = window.getFocus() == this;
		if(focused) {
			cursorWait++;
			if(cursorWait == CURSOR_WAIT) {
				cursorWait = 0;
				cursorColor = cursorColor == 0? 1 : 0;
			}
			g.setColor(CURSOR_COLOR[cursorColor]);
			char cursorChar = (cursor == text.length())? ' ' : text.charAt(cursor);
			int x = font.getWidth(text.toString().substring(0, cursor));
			if(cursor > 0) x -= 3; // charspacing
			g.fillRect(x+2,3,font.getWidth(""+cursorChar),14);
		}
		font.write(g, text.toString(), 2, 0, getWidth()-4, getHeight(), Component.ALIGN_BOTTOM_LEFT);
		g.setColor(0);
		g.drawRect(0,0,getWidth()-1,getHeight()-1);
		g.setColor(0xC6C6C6);
		g.drawRect(1,1,getWidth()-3,getHeight()-3);
	}
}


class Canvas14 extends Canvas implements Runnable, EventListener {
	Window win = new Window(4,4,120,120) {
		public int getFocusAction(long key) {
			switch(Example14.canvas.getGameAction((int)key)) {
				case Canvas.FIRE:	return FOCUSACTION_FIRE;
				case Canvas.UP:
				case Canvas.LEFT:	return FOCUSACTION_PREV;
				case Canvas.DOWN:
				case Canvas.RIGHT:	return FOCUSACTION_NEXT;
				default: return FOCUSACTION_NONE;
			}
		}
	};	// the main window -reference-
	boolean exit;	// setted to true to finish the application
	static final int ACTION_EXIT = 1;
	
	// 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; break;
				}
				break;
			default: break;
		}
	}
	
	Canvas14() {
		try {
			final char[] charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'".toCharArray();
			final Image[] images = new Image[charset.length];
			for(int i=0; i<charset.length ;i++) {
				images[i] = Image.createImage("/mwt/" + ((int)charset[i]) + ".png");
			}			
			Font font = new Font(images, charset, -3);
			Label.setDefaultFont(Label.STYLE_DEFAULT, font);
			Button.setDefaultFont(Button.STYLE_DEFAULT, font);
			Button.setDefaultFont(Button.STYLE_PRESSED, font);
			Button.setDefaultFont(Button.STYLE_FOCUSED, font);
			win.add(new Label(6,14,60,20,"Name"));
			win.add(new Label(6,40,60,20,"Subj"));
			win.add(new Label(6,66,60,20,"Msg"));
			win.add(new BasicTextBox(50,10,58,20,font));
			win.add(new BasicTextBox(50,36,58,20,font));
			win.add(new BasicTextBox(50,62,58,20,font));
			win.add(new Button(50,88,58,20,"Submit",this,ACTION_EXIT));
		}
		catch(Exception e) { e.printStackTrace(); }
		win.setFocusFirst();
	}
	
	protected void paint(Graphics g) {
		g.setColor(0xFFFFFFFF);
		g.fillRect(0,0,getWidth(),getHeight());
		
		Random r = new Random();
		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);
	}
	
	
	public void run() {
		while(!exit) {
			win.repeatKeys(true);
			repaint();
			serviceRepaints();
			try { Thread.sleep(1); }
			catch(Exception e) { e.printStackTrace(); }
		}
		Example14.instance.notifyDestroyed();
	}
}


public class Example14 extends MIDlet {
	static MIDlet instance;
	static Canvas canvas;
	protected void startApp() throws MIDletStateChangeException {
		instance = this;
		Canvas14 c = new Canvas14();
		canvas = c;
		Display.getDisplay(this).setCurrent(c);
		new Thread(c).start();
	}
	protected void pauseApp() { }
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
}