Notification For Mouse-Selection Inside Editor?

Hi,

I need a feature like this (PS this will contribute to an OpenSource project I will publish in a month and is the Unity-Integration part !...

1) User clicks on a button inside a custom inspector
2) Mouse pointer is changed to a "camera" symbol or something
3) User selects a rectangle inside the current editor view of the scene, just like you can drag a rectangle for selecting objects right now
3.5) Preferably, the standard "select objects" functionality that normally happens now, should also be disabled during this process.
4) The coordinates&dimensions of this rectangle need to be intercepted by my script
5) Mouse cursor changes back to normal
6) I also need the editor view camera, especially the transformation matricies. Right now I can only get the ones for the Game-View, but that is insufficent, I need the one from the editor window!

Feature 3, 4 and 6 are crucial. The rest would be nice to have. Right now I can't figure out anything but the first one LOL.

Some pointers would be nice. I don't need code in particular (would be nice though), API docs or whatever is normally sufficient, I just have no idea how to implement these features right now, since its Editor, I only now how to do that in Game-Mode.

Thanks!

 

Pheww! I found something that seems to work... Still there are some artifacts. How could I disable all gizmos for the currently selected scene object? Because right now they are distorted while selecting the camera region.

Also the selected camera region is not 100% aligned with the scene view. If I end the drag&drop process you can see that it is a few pixels larger in all directions because it kinds "snaps" back to the original scene view. You need to try it out to see what I mean . The code just needs to be added to a custom editor script for any monobehaviour and then you can select a subregion of the view screen by dragging with the right mouse button.

PS: I dislike the fact that to create code like this, you are basically forced to skim through Unity using a decompiler... Maybe you could provide at least some major portion of the front-end source code along with the engine. After all, decompilation yields enough results for the "evil" guys anyway. So this only holds back honest users.

Code (csharp):

1. private static Vector3 mouseStart;
2.     private static Rect mouseRect;
3.  
4.     public void OnSceneGUI()
5.     {
6.         var screenSize = Camera.current.ViewportToScreenPoint(new Vector3(1,1,0));
7.         var current = Event.current;
8.  
9.         if (current.type == EventType.MouseDown)
10.         {
11.             current.Use();
12.             mouseStart = current.mousePosition;
13.         }
14.  
15.         if (current.type == EventType.MouseDrag)
16.         {
17.             current.Use();
18.             var xy = current.mousePosition;
19.             mouseRect = new Rect(mouseStart.x, mouseStart.y, Math.Max(50, xy.x - mouseStart.x), Math.Max(50, xy.y - mouseStart.y));
20.         }
21.  
22.         if (current.type == EventType.MouseUp)
23.         {
24.             current.Use();
25.             mouseRect = new Rect(0, 0, 0, 0);
26.         }
27.  
28.         if ((mouseRect.width > 0)  (mouseRect.height > 0))
29.         {
30.             var r = mouseRect;
31.  
32.             if (current.type != EventType.Repaint)
33.                 current.Use();
34.  
35.             Handles.ClearCamera(new Rect(0, 0, screenSize.x, r.yMin), Camera.current);
36.             Handles.ClearCamera(new Rect(0, r.yMin, r.xMin, screenSize.y), Camera.current);
37.             Handles.ClearCamera(new Rect(r.xMin, r.yMax, screenSize.x, screenSize.y), Camera.current);
38.             Handles.ClearCamera(new Rect(r.xMax, r.yMin, screenSize.x, r.yMax), Camera.current);
39.  
40.             Camera.current.rect = new Rect(0.0f, 0.0f, 1f, 1f);
41.         }
42.  
43.         if (GUI.changed)
44.             EditorUtility.SetDirty(target);
45.     }