Disable built-in menu items, override built-in hotkeys

More of a philosophical question, but is it possible to disable/remove some of the built-in editor menus and menu items ("File/" or "Edit/Cut" &c), or override some of the built-in hotkeys (Ctrl-S to save, &c)? Curious how malleable the editor can be.

 

As far as built in menu items go, you're not going to be able to remove them from the menu- but with some hacky techniques you can definitely intercept the functionality and override it with reflection.

Overriding hotkeys is infinitely easier, you just need a custom editor or editorwindow and check for input in OnGUI/OnSceneGUI. Just remember that most of unity's hotkeys happen on keydown, not keyup.

As an example, one of the new hotkeys introduced in 4.3 is the "2" key- it will change your scene view to "2D" mode. To override that, it's as easy as the following code:

Code (csharp):

1.  
2. void OnSceneGUI()
3. {
4.     if ( Event.current.type == EventType.keyDown )
5.     {
6.         if ( Event.current.isKey  Event.current.keyCode == KeyCode.Alpha2 )
7.         {
8.             Debug.Log( "Number 2 was pressed, default unity hotkey is overridden." );
9.             Event.current.Use();    // if you don't use the event, the default action will still take place.
10.         }
11.     }
12. }

 

Nice post.