从发生事件的类返回值：ADDED_TO_STAGE

Question

I have a class with ADDED_TO_STAGE event (it's an incomplete dialog), and I want it to return a value. Is this possible? Or what's the what's the way I should follow?

My class: http://sudrap.org/paste/text/555684/

Edit: I'll create some buttons in the class. I want buttons' functions to return some value. And I'll need to get which button is clicked. I want to pass these values to main fla.

I'll probably need the class to return an array for settings specified in the dialog.

Answer 1

Generally speaking what you have there is a view . Something visual that the user can interact with.

You should define your view in that class. Apparently you want to pass a bunch of comboboxes and checkboxes to your class. This is not the way to do this.

comboboxes and checkboxes are themselves views. They are also called components (because they provide additional functionality like styling, etc). If your popup should be made up of comboboxes and checkboxes that's fine. Create them in your class PopupDialog, but do not pass them to the class.

The thing that you should pass to your class is the model , that is the data that the user should be able to modify.

In the realm of Flash's components, this is a DataProvider object. Take a look at the description of the .dataProvider property of the ComboBox class:

Gets or sets the data model of the list of items to be viewed. A data provider can be shared by multiple list-based components. Changes to the data provider are immediately available to all components that use it as a data source.

As you can see the model or dataProvider holds some data. It is an object that is shared by all views that display that very same data. As soon as this data is manipulated in any way, all other views are notified of that change.

I hope you can see how this solves your problem: it doesn't matter if your view is a popup or not. As long as it operates on a model that is shared with the rest of your application, the functionality to return the value is already there.

Answer 2

You can do this by creating your custom event class that extends Event and pass your required parameters within.

    package{
    import flash.events.Event;
    public class CustomEvent extends Event{

        public static const PASS_PARAMS:String = "passParams";

        // Your custom properties.
        public var btnName:*;

        public function CustomEvent(type:String, bName:*, bubbles:Boolean=false, cancelable:Boolean=false):void {
            this.btnName = bName;
            super(type, bubbles, cancelable);
        }

        override public function clone():Event{
            return new CustomEvent(type,btnName, bubbles, cancelable);
        }
     }
   }

and dispatch your customEvent on button click event whenever happens

    btn.addEventListener(MouseEvent.CLICK, onBtnClick);
    private function onBtnClick(e:MouseEvent):void{
        dispatchEvent(new Event(CustomEvent.PASS_PARAMS, e.target.name));
    }

and add a listener on your Main class

    this.addEventListener(CustomEvent.PASS_PARAMS, onProcessedEvent);       
    private function onProcessedEvent(e:CustomEvent):void{
        trace(e.btnName);
    }