Passing entire doc class as function argument -- good or bad?

programming flash
1

I saw a post that touched on this, but I thought it deserved a thread of its own for explicit verification. It seemed that some of the resident geniuses here had given the thumbs-up to passing your whole doc or app class to a function. Please correct me if I’m wrong, as this sounds convenient but I assumed it would cause heart attacks and CPU meltdowns.

EXAMPLE: Say I have an app class that controls my entire game (or slideshow), and it has an ENTER_FRAME scrolling function that’s 50 lines long with tons of conditionals so I want to take it out and make it an external file. I pop it into a new .as file but now all my variables are out of scope. I could pass them each individually, but there are so many it’s impractical. So my question is: good or bad practice to pass the entire class?

// in app or doc class
this.addEventListener(Event.ENTER_FRAME, scroll_me);
public var scroll_me(evt:Event):void {
   // Scroller.as now has the long scrolling function 
   Scroller(this); // Really?!?!
}