Swing动画暂停和恢复 [英] Swing animation pause and resume

问题描述

我想为我的游戏添加暂停/恢复的可能性.不幸的是，我的解决方案只会暂停游戏，但不会恢复它(当我单击恢复"按钮时没有任何反应 - 图像仍然存在).我还尝试在 thread 上调用 wait/notify 方法，但它也不起作用 - 我在线程AWT-EventQueue-0"java.lang.IllegalMonitorStateException 中遇到了 Exception.暂停/恢复的最佳解决方案是什么?

I want to add possibility to pause/resume to my game. Unfortunately my solution only pauses the game, but does not resume it (when I click resume button nothing happens - the image is still). I also tried to call wait/notify methods on thread, but it also did not work - I got Exception in thread "AWT-EventQueue-0" java.lang.IllegalMonitorStateException. What is the best solution to make pause/resume?

游戏循环

public void run() {
    init();

    long startTime;
    long reTime;
    long waitTime;

    while (running) {
        startTime = System.nanoTime();
        int CarPosX = car.zwrocPolozenieX();
        int CarPosY = car.zwrocPolozenieY();
        update(b, CarPosX, CarPosY);
        render(b);
        //draw();
        repaint();


        if(b<4390) {
            b=b+szybkoscMapy;
        }

        reTime = System.nanoTime() - startTime;
        waitTime = targetTime - reTime/100000000;
        try {
            Thread.sleep(waitTime);
        }
        catch(Exception e) {

        }
    }
}

public void init() {
    if(thread == null) {
        thread = new Thread(this);
        thread.start();
    }
    b=0;
    running = true;
    image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
    g = (Graphics2D) image.getGraphics();


    map = new Map(levelNumber);
    car = new Car(map);
    car.setxpos(338);
    car.setypos(150);

}

听众

    pause_button.addActionListener( new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            bp.running = false;
        }
    });

resume_button.addActionListener( new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            bp.running = true;
        }
    });

推荐答案

使用 javax.swing.Timer 调整动画速度.检查了调用计时器的 start() 和 stop() 方法的典型控件这里.这个舰队模拟，它使用了这样一个Timer，如果有兴趣也可以.

Use javax.swing.Timer to pace the animation. Typical controls that invoke the timer's start() and stop() methods are examined here. This fleet simulation, which uses such a Timer, may also be if interest.

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