UI element binding not working anymore

Unity Engine
1

Hello,

I did a binding with a Boss health bar and a UI Elements yesterday. It was working yesterday, I didn’t change anything and today it’s not working.

Script on my Game object in game “BossHealth.cs”:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

[System.Serializable]
public class BossHealth : MonoBehaviour
{
    public int maxHealth;
    public int currentHealth;
    public float percentHealth;
 
    private void Start()
    {
        maxHealth = 3000;
        currentHealth = 2000;
    }
 
    private void Update()
    {
        percentHealth = ((float)currentHealth / maxHealth) * 100;
    }

}

Script for my UI

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEngine.UIElements;
using UnityEditor.UIElements;
using System;

public class bind_boss_bar : MonoBehaviour
{
    private VisualElement m_Root;
    private Label m_BossName;
    private ProgressBar m_BossLife;
    private VisualElement m_BossVisualElement;

    public GameObject bossScript;
    public float bossCurrentHealth;
    public float bossMaxHealth;
    public float bossPercentHealth;

    void OnEnable()
    {
        m_Root = GetComponent<UIDocument>().rootVisualElement;
        m_BossName = m_Root.Q<Label>("raid-boss-name");
        m_BossLife = m_Root.Q<ProgressBar>("raid-boss-life");
        m_BossVisualElement = m_Root.Q<VisualElement>("raid-boss-progress-bar");

        //Access game object and get value
        bossScript = GameObject.Find("Boss");
        bossCurrentHealth = bossScript.GetComponent<BossHealth>().currentHealth;
        bossMaxHealth = bossScript.GetComponent<BossHealth>().maxHealth;

        //Update progress bar
        m_BossLife.value = ((float)bossCurrentHealth / bossMaxHealth)*100;

        SerializedObject so = new SerializedObject(bossScript.GetComponent<BossHealth>());
        m_Root.Bind(so);
        m_BossLife.bindingPath = "bossPercentHealth";
    }

}

And in my UI Elements I set :
Binding path : “bossPercentHealth”

It only works if I add this code on my script for my UI , but it’s not a binding at all…

    private void Update()
    {
        bossCurrentHealth = bossScript.GetComponent<BossHealth>().currentHealth;
        bossMaxHealth = bossScript.GetComponent<BossHealth>().maxHealth;
        m_BossLife.value = ((float)bossCurrentHealth / bossMaxHealth)*100;
    }
2

Hi @fomafomitch ,

At the moment, data binding is not supported for runtime use cases like yours. Data binding is currently limited to inspecting Unity objects in the context of the Editor UI (such as inspectors).

In the future, we plan to expand the support for data binding by supporting binding from a more varied set of data sources to any Visual Element property (not just the “value” property), in a way that works in the Player.

1 Like
3

Ok, so I need to set up “event callback” for my UI ?

Do you have an ETA for this feature ?

Thank you for your work.