figurechoicecanvas.java

用J2ME开发的卡片游戏

/**
 * 
 * 人物头像选择界面
 * 
 * 
 */

package card;

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.Image;

import card.stringtable.ImageStringTable;
import card.stringtable.TextString;

import java.io.IOException;

public class FigureChoiceCanvas extends Canvas implements Runnable{
	Display display = null;
	Image imgFigureChoice = null;
	Image imgLeftArrow = null;
	Image imgRightArrow = null;
	Thread thread = null;
	CardGameCanvas cvsCardGame = null;	
	
	final int COLOR_SCREEN = 0x3A6EA5; //背景色
	final int COLOR_BLACK = 0x000000; //黑色
	final int COLOR_WHITE = 0xFFFFFF; //白色
	final int SCREEN_WIDTH = 176; //屏幕宽度
	final int SCREEN_HEIGHT = 208; //屏幕高度
	final int FIGURE_WIDTH = 32; //头像宽度
	final int FIGURE_HEIGHT = 32; //头像高度
	
	int iFigureChoice; //选择的头像
	int iChoice; //画的头像
	int iFigureMoveX; //移动的像素
	boolean bChoice; //是否已选择
	boolean bMoveLeft; //是否往左移
	boolean bFinishChoice; //是否结束选择
	
	public FigureChoiceCanvas(Display display) {
		this.setFullScreenMode(true);
		this.display = display;
		
		iFigureChoice = 0;
		iChoice = 0;
		iFigureMoveX = 0;
		bChoice = false;
		bMoveLeft = true;
		bFinishChoice = false;
	}	 
	
	public void init () {		
		try {
			imgLeftArrow = Image.createImage(ImageStringTable.getImgLeftArrowString());
			imgRightArrow = Image.createImage(ImageStringTable.getImgRightArrowString());	
			imgFigureChoice = Image.createImage(ImageStringTable.getImgFigureMapSmallString());
			thread = new Thread(this);
			thread.start();
		}catch (IOException e) {
			ErrorHandling ehIOException = new ErrorHandling(display, ErrorHandling.IMGNOTFOUND);
		}	
	}
	
	 protected synchronized void keyPressed(int keyCode) {
	    int iKey = getGameAction(keyCode);
	    if (iKey == Canvas.LEFT) { //左移,显示上一个头像
	    	iChoice = iFigureChoice;
	    	bMoveLeft = true;
	    	bChoice = true;
	    	if (iFigureChoice > 0) {
	    		iFigureChoice--;
	    	}else {
	    		iFigureChoice = 3;
	    	}  	
	    }else if (iKey == Canvas.RIGHT) { //右移,显示下一个头像
	    	iChoice = iFigureChoice;
	    	bMoveLeft = false;
	    	bChoice = true;
	    	if (iFigureChoice < 3) {
	    		iFigureChoice++;
	    	}else {
	    		iFigureChoice = 0;
	    	}	    		    	
	    }else if (iKey == Canvas.FIRE) { //确定,以当前头像进入游戏
	    	bFinishChoice = true;
	    	if (cvsCardGame == null) {
	    		cvsCardGame = new CardGameCanvas(display, iFigureChoice);
	    	}
	    	display.setCurrent(cvsCardGame);
	    	cvsCardGame.init();
	    }
	 }
	
	public void paint(Graphics g) {
		g.setColor(COLOR_SCREEN);
		g.fillRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
		g.setClip(SCREEN_WIDTH / 2 - FIGURE_WIDTH / 2 - iFigureMoveX,  SCREEN_HEIGHT / 2 - FIGURE_HEIGHT / 2, FIGURE_WIDTH, FIGURE_HEIGHT);		
		g.drawImage(imgFigureChoice, SCREEN_WIDTH / 2 - FIGURE_WIDTH / 2 - iFigureMoveX, SCREEN_HEIGHT / 2 - FIGURE_HEIGHT / 2 - iChoice * FIGURE_HEIGHT, Graphics.TOP | Graphics.LEFT);
		g.setClip(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
		g.setColor(COLOR_WHITE);
		g.drawString(TextString.getTxtFigureChoiceString(), SCREEN_WIDTH / 2, 50, Graphics.BASELINE | Graphics.HCENTER);
		g.setColor(COLOR_BLACK);
		g.drawImage(imgLeftArrow, SCREEN_WIDTH / 2 - 30, SCREEN_HEIGHT / 2 + 9, Graphics.BOTTOM | Graphics.HCENTER);
		g.drawImage(imgRightArrow, SCREEN_WIDTH / 2 + 30, SCREEN_HEIGHT / 2 + 9, Graphics.BOTTOM | Graphics.HCENTER);
	}
	
	public void run() {
		while (!bFinishChoice) {
			if (bChoice) {				
				for (int i = 0; i<3; i++) {					
					if (bMoveLeft) {
						iFigureMoveX += SCREEN_WIDTH /6;
					}else {
						iFigureMoveX -= SCREEN_WIDTH /6;
					}					
					try {
						Thread.sleep(100);
					}catch (Exception e) {
					}	
					repaint();
				}
				iChoice = iFigureChoice;
				bChoice = false;
				iFigureMoveX = 0;
			}
		}
	}
	
}