如何在LibGDX中获取所有按住的鼠标按钮？

import com.badlogic.gdx.Input.Buttons;
import com.badlogic.gdx.InputAdapter;

public class MyInputProcessor extends InputAdapter {
    @Override
    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
        if (button == Buttons.LEFT) {
            // 左键按下的处理逻辑
        } else if (button == Buttons.RIGHT) {
            // 右键按下的处理逻辑
        }
        return true;
    }

    @Override
    public boolean touchUp(int screenX, int screenY, int pointer, int button) {
        if (button == Buttons.LEFT) {
            // 左键释放的处理逻辑
        } else if (button == Buttons.RIGHT) {
            // 右键释放的处理逻辑
        }
        return true;
    }

    @Override
    public boolean touchDragged(int screenX, int screenY, int pointer) {
        // 鼠标拖拽的处理逻辑
        return true;
    }
}

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputMultiplexer;
import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;

public class MyGame extends ApplicationAdapter {
    @Override
    public void create() {
        InputMultiplexer inputMultiplexer = new InputMultiplexer();
        MyInputProcessor myInputProcessor = new MyInputProcessor();
        inputMultiplexer.addProcessor(myInputProcessor);
        Gdx.input.setInputProcessor(inputMultiplexer);
    }

    @Override
    public void render() {
        // 游戏渲染逻辑
    }

    public static void main(String[] args) {
        LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
        new LwjglApplication(new MyGame(), config);
    }
}