My Answers account is on the fritz at the moment.
When I press control+Z, ‘count’ drops down to the next-highest even number. It should just decrease by one. What am I doing wrong?
Here’s the object:
class Undoable extends Monobehaviour {
var count : int;
}
Here’s its editor:
@CustomEditor(Undoable)
class UndoTest extends Editor {
function OnInspectorGUI() {
if ( GUILayout.Button("Add (" + target.count + ")") ) {
Undo.RegisterUndo(target as Undoable,target.count.ToString());
target.count = target.count + 1;
}
}
}
Clicking the button adds one to count. Pressing control-z, or using the Undo option from the menu, drops the count to the next highest even number (so if I add to 11, then undo, it’ll go to 10, then 8, then 6, etc.)
The problem is a lot worse in my actual class inspector. Undo doesn’t just skip a step, it drops straight back to the state of the object when the scene was last loaded.
Edit: Scratch that, it’s a magical mystery state somewhere between a prefab and the object with the broken prefab connection. Yaay. I’m sure there’s a complex logic error in that one somewhere.
As a bonus, thinking perhaps GUI was responsible for not following EditorGUI’s rules, I wrote a second method of both adding and undoing. Notice that the code is all new. I must be doing something really obviously wrong, or else be really bad at searching for ‘undo doesn’t work rite’.
@CustomEditor(Undoable)
class UndoTest extends Editor {
var count : int; var propcount : SerializedProperty;
function OnEnable() {
propcount = serializedObject.FindProperty("count");
}
function OnInspectorGUI() {
serializedObject.Update();
if ( EditorGUILayout.Toggle("Add " + propcount.intValue, false, EditorStyles.miniButton) ) {
propcount.intValue += 1;
}
serializedObject.ApplyModifiedProperties();
}
}
