Bumping this old thread because it hasn't really been resolved, there is no real step-by-step tutorial on how to do chat windows, and the example hasn't been updated since ArenMook said in this thread that it was no longer the correct way to do this.
I, too, have just got a chat window working from the included example by copy-and-pasting from the example into my project and making the necessary corrections. However, the scroll function doesn't work just like the others. In my case, the UIText List and other components are under a 2D camera connected to a 2D UI Root like the other examples (I also have a lot of HUD elements there). The 2D camera is set to Depth Only, etc., and then there is a standard 3D perspective camera for the player. Everything is working perfectly except for the scrolling.
Since the scrolling is dependent on clicking on the collision trigger attached to the Text List, which is under the 2D camera that's below the main scene, would I be right in thinking that there's no way for the player to actually click on it from the main camera?
I can get my game to work without the scrolling, but it would be a nice feature to add. I'm just now sure how it would be hooked up in a 3D environment. I've tried hooking it up under the main camera so that the collision was actually on-screen, but that didn't seem to work either, though there's probably something obvious I missed.
Any thoughts?