koobas.hobune.stream
How to use the Undo class to record editor script property changes?
The issue is fairly obvious
EditorGUI.BeginChangeCheck();
myFloat= EditorGUILayout.Slider("Slider", myFloat, -3, 3);
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(this, "float");
EditorUtility.SetDirty(this);
}
Since we already changed the value myFloat it doesn't make much sense to call Undo.RecordObject() - but we shouldn't call it before that either because the EditorGUILayout.Slider() is changing it every frame basically regardless of user input). Is there a built in way to support undo/redo in editor scripts or do I have to manually create another variable for every variable I want to modify?
The EditorUndoManager from the wiki worked well after some slight modifications(it's kind of expected as it's 7 years old at this point). If anyone is interested here is the link
http://wiki.unity3d.com/index.php?title=EditorUndoManager
I removed the obsolete stuff and changed them to Undo.RegisterCompleteObjectUndo(). Also the properties have to be either public or marked as [Serialized](it sounds obvious as I type it but it took me a good 20 minutes to figure out why does it work with some of my changes while it doesn't with others).
Thanks! So the trick indeed was adding [SerializeField] and ensuring the types are using [Serialized] attribute, inside the editor script. I use them all the time for monobehaviors, but writing these attributes directly inside the editor script is kind of unusual to me :D
You can also use "[SerializeField] [HideInInspector]" if you still want to hide it and to be private
Right, I mentioned this combination at the end of my answer over here. The table I created is ordered by precedence from top to bottom. So if multiple things apply, things at the top would overwrite things further down.
If you don't want to rely on 3rd party code you could do the following:
EditorGUI.BeginChangeCheck();
var myFloatForUndoCheck = myFloat;
myFloatForUndoCheck = EditorGUILayout.Slider("Slider", myFloatForUndoCheck, -3, 3);
if (EditorGUI.EndChangeCheck()) {
Undo.RecordObject(this, "My Float");
myFloat = myFloatForUndoCheck;
}
