package planegame;
import javax.microedition.lcdui.*;
import com.nokia.mid.ui.*;
/**************************************************
*類功能介紹:游戲的主要控制程序，主要用于控制顯示，
*退出，暫
*停游戲.
**************************************************/
public class cortrol extends FullCanvas  
{
	public Graphics bg=null;        //雙緩存畫布
	private main mainScreen;         //主屏幕
	private int width,height;        //屏幕寬高
	private backdrop back=null;      //背景
	private Image bufferImg=null;    //雙緩存圖片
	private plane  pl=null;          //飛機
	private bullet bu=null;          //子彈
	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);         //左移飛機
			repaint();
		}
		
		if (getGameAction(keyCode)==FullCanvas.RIGHT)
		{
			pl.movePlane(1);		//右移飛機	
			repaint();
		}

	}
	
	/**************************************************
	*功能介紹:系統(tǒng)方法,按鍵釋放時調(diào)用
	*輸入?yún)?shù):keyCode 按鍵碼
	*返回參數(shù):
	**************************************************/
	public void keyReleased(int keyCode)
	{
		pl.stopMove();				 //停止移動飛機
		
	}
	/**************************************************
	*功能介紹:顯示和刷新屏幕
	*輸入?yún)?shù):畫布
	*返回參數(shù):無
	**************************************************/
	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();
	}
};