cortrol.java

飞机游戏源码实例

package planegame;
import javax.microedition.lcdui.*;
import com.nokia.mid.ui.*;
/**************************************************
*类功能介绍:游戏的主要控制程序，主要用于控制显示，
*退出，暂
*停游戏.
**************************************************/
public class cortrol extends FullCanvas  
{
	public Graphics bg=null;        //双缓存画布
	private main mainScreen;         //主屏幕
	private int width,height;        //屏幕宽高
	private backdrop back=null;      //背景
	private Image bufferImg=null;    //双缓存图片
	private plane  pl=null;          //飞机
	private bullet bu=null;          //子弹
	public cortrol(main mainScreen)
	{
		this.mainScreen=mainScreen;
		width=getWidth();
    	height=getHeight();
		back=new backdrop(width,height);				
		bufferImg =Image.createImage(width,height);
		try{
			bg=bufferImg.getGraphics();
		}
		catch(Exception e)
		{
		}

		pl=new plane(this,width,height);	
		bu=new bullet(this,width,height);	
				
	}
	public void paint(Graphics g)
	{
		
		showCanvas(g);						
	}

	public void keyPressed( int keyCode)
	{		
		if (keyCode==-7)                  
		{
			mainScreen.goBack();     //返回主屏幕
		}

		if (getGameAction(keyCode)==FullCanvas.LEFT)
		{
			pl.movePlane(0);         //左移飞机
			repaint();
		}
		
		if (getGameAction(keyCode)==FullCanvas.RIGHT)
		{
			pl.movePlane(1);		//右移飞机	
			repaint();
		}

	}
	
	/**************************************************
	*功能介绍:系统方法,按键释放时调用
	*输入参数:keyCode 按键码
	*返回参数:
	**************************************************/
	public void keyReleased(int keyCode)
	{
		pl.stopMove();				 //停止移动飞机
		
	}
	/**************************************************
	*功能介绍:显示和刷新屏幕
	*输入参数:画布
	*返回参数:无
	**************************************************/
	public void showCanvas(Graphics g)
	{
		bg.drawImage(back.getBackdrop(),0,0,g.TOP|g.LEFT);
		pl.refreshPlane();
		bu.refreshBullet(pl.getX());
		g.drawImage(bufferImg,0,0,g.TOP|g.LEFT);
		repaint();
	}
};