com.misaki.art-tools/Editor/AssetsHelpers/Implementation/Meshes/ExtractMaterials/ExtractMaterialsVisualProvider.cs

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

namespace Misaki.ArtToolEditor
{
    internal class ExtractMaterialsVisualProvider : OptionsVisualProvider
    {
        public override void ContentAfterList(VisualElement rootVisualElement)
        {
            rootVisualElement.dataSource = processor;

            var materialRemapOptionContainer = new VisualElement()
            {
                style =
                    {
                        display = DisplayStyle.None,
                    }
            };

            var useMaterialRemapField = new DropdownField("Use Material Remap", new List<string> { "False", "True" }, "False");
            useMaterialRemapField.SetBinding(
                nameof(DropdownField.index),
                new DataBinding()
                {
                    dataSourcePath = PropertyPath.FromName(nameof(ExtractMaterialsProcessor.useMaterialRemap))
                });
            useMaterialRemapField.RegisterValueChangedCallback(evt =>
            {
                materialRemapOptionContainer.style.display = evt.newValue == "True" ? DisplayStyle.Flex : DisplayStyle.None;
            });

            var materialLocationField = new EnumField("Location", ModelImporterMaterialLocation.External);
            materialLocationField.SetBinding(
                nameof(EnumField.value),
                new DataBinding()
                {
                    dataSourcePath = PropertyPath.FromName(nameof(ExtractMaterialsProcessor.materialLocation))
                });

            var materialRemapNamingOptionField = new EnumField("Naming Option", ModelImporterMaterialName.BasedOnTextureName);
            materialRemapNamingOptionField.SetBinding(
                nameof(EnumField.value),
                new DataBinding()
                {
                    dataSourcePath = PropertyPath.FromName(nameof(ExtractMaterialsProcessor.materialRemapNamingOption))
                });

            var materialRemapSearchOptionField = new EnumField("Search Option", ModelImporterMaterialSearch.Local);
            materialRemapSearchOptionField.SetBinding(
                nameof(EnumField.value),
                new DataBinding()
                {
                    dataSourcePath = PropertyPath.FromName(nameof(ExtractMaterialsProcessor.materialRemapSearchOption))
                });

            materialRemapOptionContainer.Add(materialLocationField);
            materialRemapOptionContainer.Add(materialRemapNamingOptionField);
            materialRemapOptionContainer.Add(materialRemapSearchOptionField);

            rootVisualElement.Add(useMaterialRemapField);
            rootVisualElement.Add(materialRemapOptionContainer);
        }
    }
}