Initial value of TextBox does not appear

[f3rn4nd0-c354r]

Hello,

I'm starting out with Mini2Dx.
I'm creating this UI, where the player has to set some numbers, but I wanted to have a default value. So I set it. But it doesn't appear. It only appears in the TextBox if I insert another character (while the game is running).

This is what I'm trying:

        // text box
        textBox = new TextBox(20, 50, 50, 20);
        textBox.setVisibility(Visibility.VISIBLE);
        textBox.setValue("5");

Full example (this is the only file I changed from a generated game.

MyMini2DxGame.java

package com.mystudio.gamename;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.assets.AssetManager;
import com.badlogic.gdx.assets.loaders.FileHandleResolver;
import com.badlogic.gdx.assets.loaders.resolvers.ClasspathFileHandleResolver;
import com.badlogic.gdx.assets.loaders.resolvers.InternalFileHandleResolver;
import com.badlogic.gdx.graphics.Texture;
import org.mini2Dx.core.assets.FallbackFileHandleResolver;
import org.mini2Dx.core.game.BasicGame;
import org.mini2Dx.core.graphics.Graphics;
import org.mini2Dx.ui.UiContainer;
import org.mini2Dx.ui.UiThemeLoader;
import org.mini2Dx.ui.element.TextBox;
import org.mini2Dx.ui.element.Visibility;
import org.mini2Dx.ui.style.UiTheme;

public class MyMini2DxGame extends BasicGame {
	public static final String GAME_IDENTIFIER = "com.mystudio.gamename";

    private AssetManager assetManager;
	private Texture texture;
    private UiContainer uiContainer;
    private TextBox textBox;
	@Override
    public void initialise() {
        // UI
        //Create fallback file resolver, so we can use the default mini2Dx-ui theme
        FileHandleResolver fileHandleResolver = new FallbackFileHandleResolver(new ClasspathFileHandleResolver(),
                                                                               new InternalFileHandleResolver());
        //Create asset manager for loading resources
        assetManager = new AssetManager(fileHandleResolver);
        //Add mini2Dx-ui theme loader
        assetManager.setLoader(UiTheme.class, new UiThemeLoader(fileHandleResolver));
        //Load default theme
        assetManager.load(UiTheme.DEFAULT_THEME_FILENAME, UiTheme.class);
        uiContainer = new UiContainer(this, assetManager);
        Gdx.input.setInputProcessor(uiContainer);

    	texture = new Texture("mini2Dx.png");
        // text box
        textBox = new TextBox(20, 50, 50, 20);
        textBox.setVisibility(Visibility.VISIBLE);
        textBox.setValue("5");

        uiContainer.add(textBox);
    }
    
    @Override
    public void update(float delta) {
        // UI
        if(!assetManager.update()) {
            //Wait for asset manager to finish loading assets
            return;
        }
        if(!UiContainer.isThemeApplied()) {
            UiContainer.setTheme(assetManager.get(UiTheme.DEFAULT_THEME_FILENAME, UiTheme.class));
        }
        uiContainer.update(delta);
    }
    
    @Override
    public void interpolate(float alpha) {
        uiContainer.interpolate(alpha);
    }
    
    @Override
    public void render(Graphics g) {
		g.drawTexture(texture, 0f, 0f);
        uiContainer.render(g);
    }
}

Full project:
mini2dxtest.zip

Thanks in advance for any help.