viewwindow_canvas.java

《精通JAVA手机游戏与应用程序设计》随书光盘

package LayerManager;

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;

public class ViewWindow_Canvas extends GameCanvas implements Runnable {

	private int drawX = 0;

	private int drawY = 0;
	
	private int dx=0,dy=0;

	private int i, j;

	private Sprite sprite;

	private Image titledImage, spriteImage;

	private Graphics g;

	private TiledLayer background;
	
	private LayerManager layManager;

	//设置精灵往右行走的数组
	private int down_seq[] = { 9, 10, 11 };
	
	protected ViewWindow_Canvas() {
		super(true);

		drawX = this.getWidth() / 2 - 16;
		drawY = this.getHeight() / 2;

		try {
			spriteImage = Image.createImage("/man.png");
			titledImage = Image.createImage("/ScrollPic.png");

		} catch (Exception e) {

		}
		//精灵单元宽32高48
		sprite = new Sprite(spriteImage, 32, 48);
		sprite.setFrameSequence(down_seq);

		g = this.getGraphics();

		background = new TiledLayer(1, 1, titledImage, 586, 121);
		background.setCell(0,0,1);
		background.move(0,drawY - 50);
		
		layManager = new LayerManager();
		
		
		Thread thread = new Thread(this);
		thread.start();

	}

	public void run() {
		while (true) {
			try {
				Thread.sleep(200);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			//清屏
			//g.setColor(255, 255, 255);
			//g.fillRect(0, 0, getWidth(), getHeight());
			//移动到下一帧
			sprite.nextFrame();
						
			//在屏幕正中间偏下走动
			sprite.setPosition(drawX + dx , drawY);
			
			layManager.append(sprite);
			layManager.append(background);	
						
			layManager.setViewWindow(dx,0,getWidth() - 40 ,150);
			g.setColor(0, 0, 0);
			g.drawString("Hello",0,0,Graphics.TOP|Graphics.LEFT);
			g.drawLine(0,19,getWidth(),19);
			layManager.paint(g,20,20);
			flushGraphics();

			if(dx < 586 - getWidth())
				dx = dx+5;
			else
				dx = 0;
			
			
		}
	}
	
}