PropertyDrawer DragAndDrop AnimationCurve

Questions & Answers
1

Hi,

so i’m here, trying to save my own AnimationCurve as .asset into my unity folder.
So far i can save them into a simple ScriptableObject with one field (AnimationCurve)
but i can’t load my saved AnimationCurve into a script’s InspectorField

Here the code full code:

[CustomPropertyDrawer(typeof(AnimationCurve))]
public class AnimationCurveDrawer : PropertyDrawer
{
	private T CreateAsset<T>() where T : ScriptableObject
	{
		T asset = ScriptableObject.CreateInstance<T>();

		string path = AssetDatabase.GetAssetPath(Selection.activeObject);
		if (path == "")
		{
			path = "Assets";
		}
		else if (Path.GetExtension(path) != "")
		{
			path = path.Replace(Path.GetFileName(AssetDatabase.GetAssetPath(Selection.activeObject)), "");
		}

		string assetPathAndName = AssetDatabase.GenerateUniqueAssetPath(path + "/New " + typeof(T).ToString() + ".asset");

		AssetDatabase.CreateAsset(asset, assetPathAndName);

		AssetDatabase.SaveAssets();
		EditorUtility.FocusProjectWindow();
		Selection.activeObject = asset;
		return asset;
	}
	public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
	{
		return 17f;
	}
	public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
	{
		if (Event.current.type == EventType.DragExited && DragAndDrop.objectReferences.Length > 0)
		{
			for (int i = 0; i < DragAndDrop.objectReferences.Length; i++)
			{
				if (DragAndDrop.objectReferences*.GetType() == typeof(AnimationCurveCustomAsset))*

  •  		{*

_ Debug.Log("Hey ? " + (DragAndDrop.objectReferences as AnimationCurveCustomAsset).curve);_
_ property.animationCurveValue = (DragAndDrop.objectReferences as AnimationCurveCustomAsset).curve;
* return;
 }
 }
 }
 if (Event.current.type == EventType.MouseDown && Event.current.button == 1)
 {
 GenericMenu menu = new GenericMenu();*_

* menu.AddItem(new GUIContent(“Save”), false, (q) =>*
* {*
* this.CreateAsset().curve = property.animationCurveValue;*
* }, “Save”);*
* menu.ShowAsContext();*
* }*
* property.animationCurveValue = EditorGUI.CurveField(position, label, property.animationCurveValue);*
* }*
}

Am I doing something wrong here ?
(btw: I gived up on how the MouseCursor look…)

2

There’s the working code:

[CustomPropertyDrawer(typeof(AnimationCurve))]
public class AnimationCurveDrawer : PropertyDrawer
{
	private T CreateAsset<T>() where T : ScriptableObject
	{
		T asset = ScriptableObject.CreateInstance<T>();

		string path = AssetDatabase.GetAssetPath(Selection.activeObject);
		if (path == "")
		{
			path = "Assets";
		}
		else if (Path.GetExtension(path) != "")
		{
			path = path.Replace(Path.GetFileName(AssetDatabase.GetAssetPath(Selection.activeObject)), "");
		}

		string assetPathAndName = AssetDatabase.GenerateUniqueAssetPath(path + "/New " + typeof(T).ToString() + ".asset");

		AssetDatabase.CreateAsset(asset, assetPathAndName);

		AssetDatabase.SaveAssets();
		EditorUtility.FocusProjectWindow();
		Selection.activeObject = asset;
		return asset;
	}
	public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
	{
		return 17f;
	}

	AnimationCurve last;
	private AnimationCurve getDragedCurve()
	{
		if (DragAndDrop.objectReferences.Length > 0 && DragAndDrop.objectReferences[0] != null && DragAndDrop.objectReferences[0].GetType() == typeof(AnimationCurveCustomAsset))
			return (DragAndDrop.objectReferences[0] as AnimationCurveCustomAsset).curve;
		return null;
	}
	public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
	{
		if (Event.current.type == EventType.DragUpdated && position.Contains(Event.current.mousePosition) && this.getDragedCurve() != null)
			DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
		if (Event.current.type == EventType.DragPerform && DragAndDrop.objectReferences.Length > 0 && position.Contains(Event.current.mousePosition))
			this.last = this.getDragedCurve();
		if (Event.current.type == EventType.MouseDown && Event.current.button == 1 && position.Contains(Event.current.mousePosition))
		{
			GenericMenu menu = new GenericMenu();

			menu.AddItem(new GUIContent("Save"), false, (q) =>
			{
				AnimationCurveCustomAsset assetSaved = this.CreateAsset<AnimationCurveCustomAsset>();

				assetSaved.curve = property.animationCurveValue;
				EditorUtility.SetDirty(assetSaved);
			}, "Save");
			menu.ShowAsContext();
		}
		property.animationCurveValue = EditorGUI.CurveField(position, label, (this.last != null) ? this.last : property.animationCurveValue);
		if (this.last != null && Event.current.type == EventType.Repaint)
			this.last = null;
	}
}