Question

通过遵循Kilbolt的Zombie Bird教程，我在项目中创建了一个代表所有按钮的类：

public class SimpleButton {

private float x, y, width, height;

private TextureRegion buttonUp;
private TextureRegion buttonDown;

private Rectangle bounds;

private boolean isPressed = false;

public SimpleButton(float x, float y, float width, float height,
        TextureRegion buttonUp, TextureRegion buttonDown) {
    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
    this.buttonUp = buttonUp;
    this.buttonDown = buttonDown;

    bounds = new Rectangle(x, y, width, height);

}

public boolean isClicked(int screenX, int screenY) {
    return bounds.contains(screenX, screenY);
}

public void draw(SpriteBatch batcher) {
    if (isPressed) {
        batcher.draw(buttonDown, x, y, width, height);
    } else {
        batcher.draw(buttonUp, x, y, width, height);
    }
}

public boolean isTouchDown(int screenX, int screenY) {

    if (bounds.contains(screenX, screenY)) {
        isPressed = true;
        return true;
    }

    return false;
}

public boolean isTouchUp(int screenX, int screenY) {

    // It only counts as a touchUp if the button is in a pressed state.
    if (bounds.contains(screenX, screenY) && isPressed) {
        isPressed = false;
        return true;
    }

    // Whenever a finger is released, we will cancel any presses.
    isPressed = false;
    return false;
}
}

每当我想创建一个按钮时，我通过创建一个SimpleButton对象在我的InputProcessor类中完成它，并在填充其参数后将其添加到List列表中。我目前的问题是我试图创建一个声音按钮，我创建它并且它工作正常，但我正在努力的是让按钮在开启和关闭状态之间改变TextureRegion。这是我如何创建一个按钮（实际上是我创建了声音按钮）并将其放入列表中的示例：

    soundButton = new SimpleButton(
            136 / 2 - (AssetLoader.soundOnNotClicked.getRegionWidth() / 0.25f),
            midPointY - 102, 15, 15, AssetLoader.soundOnNotClicked,
            AssetLoader.soundClicked);
    gameButtons.add(backButton);

我尝试使用相同的条件，当声音打开时，它将放入参数＆＃34; AssetLoader.soundOnNotClicked＆＃34;当它关闭＆＃34; AssetLoader.soundOFFNotClicked＆＃34;时，它只显示条件中的第一个TextureRegion。有人可以帮我弄清楚当声音打开和关闭时我怎么能改变TextureRigions？

编辑更改：首先创建了第二个约束器：

public SimpleButton(float x, float y, float width, float height,
        TextureRegion buttonUp, TextureRegion buttonDown, TextureRegion buttonOn) {
    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
    this.buttonUp = buttonUp;
    this.buttonDown = buttonDown;
    this.buttonOn = buttonOn;

    bounds = new Rectangle(x, y, width, height);

}

然后改变了一下isClicked方法：

public boolean isClicked(int screenX, int screenY) {
    if (isOn == false) {
        isOn = true;
    }else {
        isOn = false;
    }
    return bounds.contains(screenX, screenY);
}

然后改变了绘制方法：

public void draw(SpriteBatch batcher) {
    if (isPressed) {
        batcher.draw(buttonDown, x, y, width, height);
    } else {
        if (isOn == false) {
            batcher.draw(buttonUp, x, y, width, height);
        }else{
            batcher.draw(buttonOn, x, y, width, height);
        }
    }
}

最后，我通过添加OFF声音的textureRegion来改变按钮的创建：

    soundButton = new SimpleButton(
            136 / 2 - (AssetLoader.soundButtonOff.getRegionWidth() / 0.25f),
            midPointY - 102, 15, 15, AssetLoader.soundButtonOff,
            AssetLoader.soundButtonOn, AssetLoader.soundButtonOffX);
    menuButtons.add(soundButton);

Answer 1

创建另一个名为isOn的布尔值，就像isPressed一样
添加另一个名为buttonOn的TextureRegion，就像buttonDown
将TextureRegion buttonDown添加到构造函数中并像设置buttonDown一样将其设置为
只要在isClicked（）中单击按钮，就翻转布尔值。（isOn =！isOn）
如果isOn为true，则在draw方法中添加条件以绘制buttonOn纹理。

那几乎应该这样做。

libGDX更改按钮的图像

1 个答案: