LibGDX - change actor's texture

Question

Is there a way to change actor texture without creating a new object?

I want to change my ImageButton texture when resize() is called, and for example for screen > 800px, ImageButton have bigger texture, and if screen <= 800px, ImageButton have smaller texture?

Now when I'm increasing my window size, ImageButton is scaling up but quality is bad so I want to load bigger texture.

Thank you for help.

Answer 1

You have to change it in ImageButton's style and convert your Texture to Drawable using TextureRegionDrawable:

// load your texture:
Texture newImage = new Texture(Gdx.files.internal("biggerImage.png"));

// get button's style
ImageButtonStyle style = myButton.getStyle();
Drawable drawable = new TextureRegionDrawable(new TextureRegion(newImage));
style.imageUp = drawable;
style.imageDown = drawable;

Done!

@Edit

new TextureRegionDrawable won't allocate memory, because we pass an existing 'newImage' texture to it's constructor, BUT - it's a bad programming practice to make objects in places like render(), resize() etc. To do this right, declare two Textures at the start of your screen, big and small one, declare two Drawables, also at the start and load them via new TextureRegionDrawable and then in resize() put only:

if(screenSizeIsBig){ // your condition for big screen size
    style.imageUp = bigDrawable;
    style.imageDown = bigDrawable;
}else{ // 
    style.imageUp = smallDrawable;
    style.imageDown = smallDrawable;
}