如何将事件侦听器与“询问”组合为事件？ [英] How to combine event listeners with "asking" for an event?

问题描述

我写了一个简单的小迷宫游戏终端，反复要求用户做某事（例如你要去哪个方向？[N / E / S / W]）。我有一个 navigate（）方法运行在一个循环中，消除这些问题，存储他们的答案，并根据答案做一些事情。

I wrote a simple little maze game for a terminal which repeatedly asks the user to do something (e.g. "In which direction would you like to go? [N/E/S/W]"). I have a navigate() method running in a loop that fires off these questions, stores their answers and does something depending on the answer.

public enum Dir (N, E, S, W);

public void navigate() {
    Dir nextDir = utils.askDirection("Which way do you want to go?");
    // Do stuff with answer, like changing position of user in maze
}

现在，我为我的游戏写了一个简单的GUI。我故意将终端的所有引用放在一个 ConsoleUtils 类中，该类实现了一个 Utils 接口（这有一些方法，如 askQuestion（）） - 这个想法是我可以创建一个 GuiUtils 类，让我的游戏作为终端游戏em>或作为GUI游戏。

Now, I've written a simple GUI for my game. I deliberately put all the references to the terminal in a ConsoleUtils class which implements a Utils interface (this has methods like askQuestion()) - the idea being that I could create a GuiUtils class and have my game either as a terminal game or as a GUI game.

问题是导航方法向用户询问问题，然后等待响应， Utils 类通过使用 Scanner 来读取最新的输入行。但是，如果我在GUI中使用新的N / E / S / W按钮的事件监听器，则无论导航方法是否要求一个，都会触发事件。
- > GUI的图像

The problem is that the navigate method asks the user a question and then "waits" for the response, which the Utils class gives it by using a Scanner to read the newest line of input. However if I use Event Listeners for the new N/E/S/W buttons in my GUI, they fire off events regardless whether the navigate method has asked for one or not. --> Image of GUI

有什么办法可以组合这个，还是需要为GUI编写一个新的导航方法？

Is there any way I can combine this or do I need to write a new navigate method for the GUI?

（说实话，我也不完全确定我的GUI类是否应该实例化一个游戏类，在这种情况下，导航的逻辑可能会导致GUI方法，或者游戏是否应该有GUI。我还没有为事件侦听器编写任何代码但是，因为我不知道哪个类应该调用哪个类，这可能是一个单独的问题。）

(To be honest, I'm also not entirely sure whether my GUI class should instantiate a game class, in which case the logic for navigate could end up in a GUI method anyway, or whether the game should have a GUI. I haven't written any code for the event listener either yet, since I'm not sure which class should be calling which. This is probably a separate question.)

推荐答案

你的文本基于游戏的游戏有一个循环，反复询问收集用户输入的问题。 Swing通过持续执行已发布到 Runnable 代码块，为您提供此循环/docs/api/java/awt/EventQueue.htmlrel =nofollow noreferrer> EventQueue 。例如，当用户按下标签为按钮时> E ，代码发布到调用您的 ActionEvent 实现的队列，以处理您的游戏对 move east的解释命令。

Your text based game has a loop that repeatedly asks questions to gather user input. Swing provides this loop for you by continually executing Runnable blocks of code that have been posted to the EventQueue. For example, when the user presses a button labeled E, code is posted to the queue that invokes your ActionEvent implementation to handle your game's interpretation of the move east command.

为了参考，一个非常简单的猜测游戏的完整示例将被检查此处。在伪代码中，相应的基于文本的游戏可能如下所示：

For reference, a complete example of a very simple guessing game is examined here. In pseudocode, the corresponding text based game might look like this:

initialize
loop
    prompt "Guess what color!"
    get chosenColor
    if chosenColor = actualColor
        say "You win!"
        reset game
    else
        say "Keep trying."
end loop

更精细的游戏引用，其中包含原始的基于文本的来源。

A more elaborate game cited there includes the original text-based source.

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