import org.newdawn.slick.state.transition.VerticalSplitTransition; //导入依赖的package包/类
@Override
public void update (GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
	Input input = gc.getInput();
	
  if(input.isKeyPressed(Input.KEY_UP)){
	  if(index > 0){
      index--;
	  }
  }else if(input.isKeyPressed(Input.KEY_DOWN)){
    if(index < (menuText.length -1)){
      index++;
    }
  }else if(input.isKeyPressed(Input.KEY_ENTER)){
	  if(menuText[index] == "Spiel starten"){ //make sure player is connected
		  if( (spOne.getConnected() && ((boolean)status.get(1).getData())) || 
		      !(boolean)status.get(1).getData() ){
		    sbg.getState(Spacerun.GAMESTATE).init(gc, sbg);
		    sbg.enterState(Spacerun.GAMESTATE, null, new VerticalSplitTransition());
      }
  	}else if(menuText[index] == "Multiplayer"){ //make sure player is connected
  	  if( (spOne.getConnected() && spTwo.getConnected() && ((boolean)status.get(1).getData())) ||
  	      !(boolean)status.get(1).getData()){
  	    status.get(0).setData(true);
		    sbg.getState(Spacerun.GAMESTATE).init(gc, sbg);
		    sbg.enterState(Spacerun.GAMESTATE, null, new VerticalSplitTransition());
      }
	  }else if(menuText[index] == "Highscores"){
	    sbg.getState(Spacerun.HIGHSCORESTATE).init(gc, sbg);
  	  sbg.enterState(Spacerun.HIGHSCORESTATE, null, new VerticalSplitTransition());
    }else if(menuText[index] == "Steuerung"){
      sbg.getState(Spacerun.CONTROLSTATE).init(gc, sbg);
      sbg.enterState(Spacerun.CONTROLSTATE, null, new VerticalSplitTransition());
		}else if(menuText[index] == "Exit"){
  	  gc.exit();
	  }   
  }
  if(input.isKeyPressed(Input.KEY_ESCAPE)){
	  gc.exit();
  }
}