karljj1 · September 16, 2024 13:51 · karljj1 · Sep 16, 2024 · karljj1 · Sep 16, 2024
diff --git a/UxmlAttribute_SerializeReference.cs b/UxmlAttribute_SerializeReference.cs
 using System;
 using UnityEditor;
 using UnityEditor.UIElements;
 using UnityEngine;
 using UnityEngine.UIElements;

 // Our Interface.
 public interface IMyInterface
 {
 }

 // Example implementations of the interface.
 [Serializable]
 public class MyInterfaceImplementation : IMyInterface
 {
    public int someValue;
 }

 [Serializable]
 public class MyOtherInterfaceImplementation : IMyInterface
 {
    public string someString;
    public float someFloat;
 }

 // Our class that contains a reference to the interface.
 [Serializable]
 public class MyClass
 {
    [SerializeReference]
    public IMyInterface myInterface;
 }

 // The converter class. This converts to and from the string representation of the interface instance
 public class MyClassConverter : UxmlAttributeConverter<MyClass>
 {
    public override MyClass FromString(string value)
    {
        return JsonUtility.FromJson<MyClass>(value);
    }

    public override string ToString(MyClass value)
    {
        return JsonUtility.ToJson(value);
    }
 }

 // The UXML element that uses the MyClass type.
 [UxmlElement]
 public partial class MyElement : VisualElement
 {
    [UxmlAttribute]
    public MyClass myClass { get; set; }
 }

 // The property drawer for the MyClass type. So we can give users options on what type to create.
 [CustomPropertyDrawer(typeof(MyClass))]
 public class MyDrawer : PropertyDrawer
 {
    public override VisualElement CreatePropertyGUI(SerializedProperty property)
    {
        var p = property.FindPropertyRelative("myInterface");

        var root = new VisualElement();

        root.Add(new Button(() =>
        {
            p.managedReferenceValue = new MyInterfaceImplementation();
            property.serializedObject.ApplyModifiedProperties();
        })
        { text = "MyterfaceImplementation" });

        root.Add(new Button(() =>
        {
            p.managedReferenceValue = new MyOtherInterfaceImplementation();
            property.serializedObject.ApplyModifiedProperties();
        })
        { text = "MyOtherInterfaceImplementation" });
        root.Add(new PropertyField(p));
        return root;
    }
 }
	using System;
	using UnityEditor;
	using UnityEditor.UIElements;
	using UnityEngine;
	using UnityEngine.UIElements;

	// Our Interface.
	public interface IMyInterface
	{
	}

	// Example implementations of the interface.
	[Serializable]
	public class MyInterfaceImplementation : IMyInterface
	{
	public int someValue;
	}

	[Serializable]
	public class MyOtherInterfaceImplementation : IMyInterface
	{
	public string someString;
	public float someFloat;
	}

	// Our class that contains a reference to the interface.
	[Serializable]
	public class MyClass
	{
	[SerializeReference]
	public IMyInterface myInterface;
	}

	// The converter class. This converts to and from the string representation of the interface instance
	public class MyClassConverter : UxmlAttributeConverter<MyClass>
	{
	public override MyClass FromString(string value)
	{
	return JsonUtility.FromJson<MyClass>(value);
	}

	public override string ToString(MyClass value)
	{
	return JsonUtility.ToJson(value);
	}
	}

	// The UXML element that uses the MyClass type.
	[UxmlElement]
	public partial class MyElement : VisualElement
	{
	[UxmlAttribute]
	public MyClass myClass { get; set; }
	}

	// The property drawer for the MyClass type. So we can give users options on what type to create.
	[CustomPropertyDrawer(typeof(MyClass))]
	public class MyDrawer : PropertyDrawer
	{
	public override VisualElement CreatePropertyGUI(SerializedProperty property)
	{
	var p = property.FindPropertyRelative("myInterface");

	var root = new VisualElement();

	root.Add(new Button(() =>
	{
	p.managedReferenceValue = new MyInterfaceImplementation();
	property.serializedObject.ApplyModifiedProperties();
	})
	{ text = "MyterfaceImplementation" });

	root.Add(new Button(() =>
	{
	p.managedReferenceValue = new MyOtherInterfaceImplementation();
	property.serializedObject.ApplyModifiedProperties();
	})
	{ text = "MyOtherInterfaceImplementation" });
	root.Add(new PropertyField(p));
	return root;
	}
	}