LibGDX play sound when hovering button

Question

I'm trying to make a button that plays a sound when hovering above it with the cursor

So far I created a class which extends the scene2d TextButton and I'm adding a FocusListener. The problem is that the sound is played a lot of times when hovering because this event fires not only once but as long as the button is focused.

//When button is hovered
this.addListener(new FocusListener() {

        public boolean handle(Event e) {

            SoundManager.play(hoverSound);

            return true;
        }
});

I also tried to make a variable soundPlayed which toggles if the sound is played once but this leads to the sound playing only one time because I don't know how to detect if the button is not focused anymore so i can reset the variable.

Thanks for the help.

Answer 1

I'm assuming you want to play the sound only once during the whole time of the hover.

Since SoundManager does not track sounds it plays, you want to set a flag preventing from playing the sound twice. Then, you should use enter and exit functions provided by ClickListener to reset the flag when you go outside of the actor (your button).

public void enter(InputEvent event, float x, float y, int pointer, Actor fromActor)
{
    if (!soundPlayed)
    { 
        SoundManager.play(hoverSound)
        soundPlayed = true;
    }
}

public void exit(InputEvent event, float x, float y, int pointer, Actor toActor)
{
    soundPlayed = false;
}

This way, sound will be played only once during hover, and can be replayed if mouse isn't hover anymore