Question

How to access a display object on the stage in a class which is not a document class?

I am looking for a solution that doesn’t involve passing the stage as a parameter to the class.

One solution i always come across is using “TopLevel.as“. Is it a good method because as far as I have heard using global variables is not recommended because it might cause some problems while working on big projects.

Answer 1

All display objects have a addedToStage event dispatched when they are added to the display list, which gives you a reference to the stage. So you could do something like this:

// In the constructor
addEventListener(Event.ADDED_TO_STAGE, onAdded);

// A class level function
private function onAdded(e:Event):void {
    // get reference from stage, eg:
    // stage.getChildByName("nameHere");
}

There is no need to use the “Top Level” class, which is relying on global (ie: static) properties.