Access Root Variables

[chris12295]

I want to do something like this:


class blah {

public function handleClickEvent ( event:MouseEvent ) : void {

this.setIndex ( _root.index );

}


}

I know _root.index doesn't work in ActionScript 3.0, so how do I access root variables from within a class or how do I accomplish what I'm trying to do?

[glidealong]

I know _root.index doesn't work in ActionScript 3.0, so how do I access root variables from within a class or how do I accomplish what I'm trying to do?

use root instead of _root and make sure you have added the instance of the class to the display list before using root.

[chris12295]

i tried this:


private function mouseUpHandler(event:MouseEvent) : void {
trace(this.root.myIndex);
}

and got this:
1119: Access of possibly undefined property myIndex through a reference with static type flash.display:DisplayObject.

[fluid_tw0]

MovieClip(this.root)

[glidealong]

i tried this:


private function mouseUpHandler(event:MouseEvent) : void {
trace(this.root.myIndex);
}

no need for 'this.root.myIndex' Try 'root.myIndex'

[chris12295]

private function mouseUpHandler(event:MouseEvent) : void {
trace(MovieClip(this.root.myIndex));
}
1180: Call to a possibly undefined method MovieClip.
1119: Access of possibly undefined property myIndex through a reference with static type flash.display:DisplayObject.


private function mouseUpHandler(event:MouseEvent) : void {
trace(root.myIndex);
}
1119: Access of possibly undefined property myIndex through a reference with static type flash.display:DisplayObject.

myIndex is declared on Frame 1 of the main timeline as:

myIndex:Number = 1;

just for testing. Later it will be dynamic. Also, I import the class which is in a separate file if that changes anything.

[Aquilonian]

MovieClip(root).myIndex

[chris12295]

Thanks. That last one worked but I didn't have import flash.display.MovieClip. So it worked after I imported.

[Pier25]

MovieClip(root).myIndex

I super new into as3, and I'm a designer... so my question is... what does that piece of code mean?

Ok I know myIndex is the name of the var. And I understand also that root is the lowest level of something.... but what does MovieClip(root) means? The lowest level in the movieclip class?... in the display object?...

As you can see I'm super lost...

Thanks ;)

[mathew.er]

It casts to MovieClip data type.

E.g. if you have a document class named MyClass that has has some public property named 'property' and you don't want to disable strict mode or use stage['property'], you would cast to the type of your document class like MyClass ( stage ).property to avoid compiler errors.

[Pier25]

Hi thanks mathew but you answer makes news questions... I know this must be super obvious to you OOP programmers but...

what is strict mode?
why do you use stage?

[Aquilonian]

There is a tip of the day about the strict mode, now i dont remember each one