helpscreen.java

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

  public class HelpScreen extends Canvas implements Runnable,CommandListener {
     private Puke midlet;     
     private boolean Up,Down;
     private Sprite title,ordeR;
     private Image im_orde,im_title,im_help,window;
     private int Y,dy; 
     private boolean Pause=false;
  public HelpScreen (Puke midlet) throws Exception {
  	setFullScreenMode(true);  
    this.midlet = midlet;    
    Y=48;dy=9;
    try{
		im_orde = Image.createImage("/orde.png");
		im_title	= Image.createImage("/title.png");
		im_help = Image.createImage("/help.png");
		window = Image.createImage("/window.png");
	}catch(java.io.IOException e){}  
    setCommandListener(this);
    
    title = new Sprite(im_title,80,18);
    title.setFrame(2);
    title.setPosition(48,18);
    
    ordeR = new Sprite (im_orde,23,11);
	ordeR.setPosition(152,208);
	ordeR.setFrame(2);
    startThread();
    setCommandListener(this);
  }
  
  private void startThread(){
    	Pause=false;
    	Thread th=new Thread(this);
    	th.start();	
    }


  public void commandAction(Command c, Displayable d) {
  }
  
  public void keyPressed(int keyCode){             
      switch(keyCode){//三页显示        
      	case -1://UP
      	     Up=true;
      	     break;
      	case -2://DOWN
      	     Down=true;
      	     break;
      	case -7://SOFT2-后退
             if(midlet.BackTo==1)      	     
             midlet.mainMenuScreenShow();
      	     break;
      	
      }
  }
  
  
  public void run(){
  	   while(!Pause){
  	   	   
  	   	   if(Up){
  	   	   	 if(Y>-20)
  	   	   	 Y-=dy;
  	   	   	 dy--;
  	   	   	 if(dy==0){
  	   	   	 	dy=9;
  	   	   	 	Up=false;
  	   	   	 }
  	   	   }
  	   	   
  	   	   if(Down){
  	   	   	 if(Y<120)
  	   	   	 Y+=dy;  	   	   	 
  	   	   	 dy--;
  	   	   	 if(dy==0){
  	   	   	 	dy=9;
  	   	   	 	Down=false;
  	   	   	 }
  	   	   }
  	   	   
  	   	   try{Thread.sleep(40);
  	       }catch (Exception e){}
           repaint();
  	   	}
  	   	
  	}
  
  
  public void paint(Graphics g) {  	    
        g.setColor(0x000000);
		g.fillRect(0,0,getWidth(),getHeight());		
        g.drawImage(im_help,27,Y,Graphics.TOP|Graphics.LEFT);
        g.drawImage(window,0,0,Graphics.TOP|Graphics.LEFT);
        title.paint(g);
        ordeR.paint(g);      
       

  }
  

}