帶有BasicGameState的Slick2D中的Textfield不回答

我目前正在用Java中的Slick2D開發一個簡單的多人遊戲。菜單結構會稍微複雜一點，因爲我需要幾個文本框來獲取服務器地址連接的信息，有多少玩家可以玩，暱稱等等。帶有BasicGameState的Slick2D中的Textfield不回答

我轉載了我的問題在3類：主類（ExampleGame）從StateBasedGame，從BasicGameStatePlay和Menu延伸。

類Play和Menu有每個文本字段和一個按鈕。我的問題是我只能將這些類中的一個鍵入到文本字段中。當您單擊文本字段時，其他文本字段不顯示任何光標響應。

這是主類ExampleGame：

public class ExampleGame extends StateBasedGame { 

public static final int MAIN_MENU_STATE = 0; 
public static final int GAME_PLAY_STATE = 1; 

public ExampleGame(String name) { 
    super(name); 

    this.addState(new Menu(MAIN_MENU_STATE)); 
this.addState(new Play(GAME_PLAY_STATE)); 

this.enterState(MAIN_MENU_STATE); 
} 

/** 
* @param args 
*/ 
public static void main(String[] args) { 
    AppGameContainer appgc; 
try{ 
    appgc = new AppGameContainer(new ExampleGame("ExampleGame")); 
    appgc.setDisplayMode(640, 360, false); 
    appgc.setTargetFrameRate(50); 
    appgc.start(); 
}catch(SlickException e){ 
    e.printStackTrace(); 
} 
} 

@Override 
public void initStatesList(GameContainer arg0) throws SlickException { 
    // TODO Auto-generated method stub 
    this.getState(GAME_PLAY_STATE); 
    this.getState(MAIN_MENU_STATE); 


System.out.println(this.getStateCount() + ", " + this.getCurrentStateID()); 
this.enterState(MAIN_MENU_STATE); 
}

}

ExampleGame自動調用的MainMenu（Menu.java）：

public class Menu extends BasicGameState { 

private int stateID; 
private Image background; 
private UnicodeFont font; 
private TextField textfield; 
private Image createGameOption; 
private int menuX = 50; 
private int menuY = 250; 


public Menu(int stateID) { 
    this.stateID = stateID; 
} 


@Override 
public void init(GameContainer arg0, StateBasedGame arg1) throws SlickException { 

    System.out.println("StateID: " + arg1.getState(this.getID()) + " , State: " + arg1.getCurrentState()); 

    background = new Image("images/background_1024x640_v1.jpg"); 
    createGameOption = new Image("images/btn_CreateGame_for_1024x640_v1.png"); 

    textfield = new TextField(arg0, arg0.getDefaultFont(), 100, 100, 200, 30); 
} 


@Override 
public void render(GameContainer arg0, StateBasedGame arg1, Graphics arg2) throws SlickException { 
    // TODO Auto-generated method stub 
    background.draw(0, 0); 
    createGameOption.draw(menuX, menuY); 
    textfield.render(arg0, arg2); 

} 


@Override 
public void update(GameContainer arg0, StateBasedGame arg1, int arg2) throws SlickException { 

    Input input = arg0.getInput(); 

    int mouseX = input.getMouseX(); 
    int mouseY = input.getMouseY(); 

    // if mouse is over a button 
    if ((mouseX >= menuX && mouseX <= menuX + createGameOption.getWidth()) && (mouseY >= menuY && mouseY <= menuY + createGameOption.getHeight())) { 

     if (input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON)) { 
      // fx.play(); 
      arg1.enterState(ExampleGame.GAME_PLAY_STATE); 
     } 

    } 

} 


@Override 
public int getID() { 
    // TODO Auto-generated method stub 
    return stateID; 
}

}

在這裏，我可以寫在文本字段中。到現在爲止還挺好。通過點擊按鈕，我所說的下一個頁面（Play.java）：

public class Play extends BasicGameState { 

private int stateID; 
private Image background; 
private UnicodeFont font; 
private TextField textfield; 
private Image createGameOption; 
private int menuX = 350; 
private int menuY = 250; 


public Play (int stateID) { 
    this.stateID = stateID; 
} 

@Override 
public void init(GameContainer arg0, StateBasedGame arg1) throws SlickException { 

    System.out.println("StateID: " + arg1.getCurrentStateID() + " , State: " + arg1.getCurrentState()); 
    arg1.inputStarted(); 

    background = new Image("images/background_1024x640_v1.jpg"); 
    createGameOption = new Image("images/btn_CreateGame_for_1024x640_v1.png"); 

    textfield = new TextField(arg0, arg0.getDefaultFont(), 150, 100, 200, 30); 
} 

@Override 
public void render(GameContainer arg0, StateBasedGame arg1, Graphics arg2) throws SlickException { 
    // TODO Auto-generated method stub 
    background.draw(0,0); 
    createGameOption.draw(menuX, menuY); 
    textfield.render(arg0, arg2); 
} 

@Override 
public void update(GameContainer arg0, StateBasedGame arg1, int arg2) throws SlickException { 

    Input input = arg0.getInput(); 

    int mouseX = input.getMouseX(); 
    int mouseY = input.getMouseY(); 

    if ((mouseX >= menuX && mouseX <= menuX + createGameOption.getWidth()) 
      && (mouseY >= menuY && mouseY <= menuY + createGameOption.getHeight())) { 

     if (input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON)) { 
      arg1.enterState(ExampleGame.MAIN_MENU_STATE); 
     } 
    } 
} 

@Override 
public int getID() { 
    // TODO Auto-generated method stub 
    return stateID; 
}

}

類Play具有幾乎相同的代碼Menu但似乎在Play文本字段不響應鼠標和鍵。它似乎是無效的，因爲你看不到任何變化。但事實並非如此。如果我在文本框中單擊，鍵入內容並通過單擊按鈕返回到菜單，您可以看到您鍵入的文本。似乎這兩個文本框（來自菜單和Play）都以某種方式連接。但我不知道問題出在哪裏。

有沒有人有任何建議，我可以解決這個問題？

在此先感謝！

來源

2013-04-20 user1885888