UI Toolkit

UiDocumentManager.cs

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

public class UiDocumentManager : MonoBehaviour
{
    UIDocument _uiDocument;
    [SerializeField]
    string _visualElementName, _scrollViewName, _ProgressBarName, _bpmLabelName;
    VisualElement _visualElement;
    VisualElement _progressBar;
    ScrollView _scrollView;
    Label _bpmLabel;

    void Awake ()
    {
        if (_uiDocument = this.GetComponent<UIDocument>())
        {
            _visualElement = _uiDocument.rootVisualElement.Q(_visualElementName);
            _progressBar = _uiDocument.rootVisualElement.parent.Q<VisualElement>(_ProgressBarName);
            _bpmLabel = _uiDocument.rootVisualElement.Q<Label>(_bpmLabelName);
            _scrollView = _uiDocument.rootVisualElement.Q<ScrollView>(_scrollViewName);
        }
    }

    public VisualElement GetBackground ()
    {
        return _visualElement;
    }

    public ScrollView GetScrollView ()
    {
        return _scrollView;
    }

    public VisualElement GetProgressBar ()
    {
        return _progressBar;
    }

    public Label GetBpmLabel ()
    {
        _bpmLabel.text = "llll";
        return _bpmLabel;
    }
}