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CodingCowgirl
CodingCowgirl wrote ...

2021/11/16

start and stop music by if-statement but how?

CodingCowgirl CodingCowgirl

2021/11/16

#
Hey, guys! So, I’m still working on this quiz. Now my problem is that the music starts as soon as I open my Greenfoot project. I have an idea for a code to solve this problem. However, it doesn’t work at all. So, my plan is a Boolean which asks if the specific world is true. How do I solve my problem?
?
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private GreenfootSound background = new GreenfootSound("background.mp3");
     
    /**
     * Constructor for objects of class MainMenu.
     *
     */
    public MainMenu()
    {   
        // Create a new world with 600x400 cells with a cell size of 1x1 pixels.
        super(1920, 1080, 1);
         GreenfootImage bg = new GreenfootImage("london-background.png");
         bg.scale(getWidth(), getHeight());
         setBackground(bg);
         mainMenu();
    }
     
    private void mainMenu() {
        Logo logo = new Logo();
        addObject(logo, 960, 540);
        Greenfoot.playSound("background.mp3");
    }
     
    private void startMusic() {
        background.playLoop();
    }
     
    private void stopMusic() {
        background.stop();
    }
     
    private void backgroundMusic() {
        if (World.MainMenu = true) {
            startMusic();
        } else {
            stopMusic();
        }
    }
  
    public void act() {
         if(Greenfoot.isKeyDown("enter")) {
             Greenfoot.playSound("mouse-click.mp3");
             Greenfoot.setWorld(new playQuiz());
            }
    }
danpost danpost

2021/11/16

#
Currently, you have no way to control the music at all because you are using Greenfoot.playSound which does not give you a reference to any GreenfootSound object. Instead, create a GreenfootSound object and retain it in a class field so you can access it from anywhere in your project. You can then stop the sound when changing world (either before, during or after creating the new world).
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