Question

In my Flex 4.5 application I have a TitleWindow Settings.mxml, which is popped up by the PopUpManager.

Once the user has changed some settings, I not only need to save them to a SharedObject, but also to apply them to the main Application itself – so that the changes are visible to the user immediately.

For example I need to call its method hideApp(somevalue);

The spark.components.Application does not seem to have any static/singleton methods to get ahold of it.

So how do you do it?

And I also wonder how to declare, that an MXML file implements one or several interfaces?

package {
  public interface Hiddable {
    function hideApp(value:Number):void;
  }
}

I’m asking this, because besides the main Application I have a SettingsTest.mxml Application in my project for “unit testing” that particular functionality.

Thank you! Alex

Answer 1

About implementing of interfaces in MXML components see the following documentation.

What about passing changed data back from your pop up window to the application I recommend you to use Observer pattern with Flash event model something like the following:

var myWindow:MyWindow = MyWindow(PopUpManager.createPopUp(this, MyWindow));
myWindow.addEventListener(MyWindowEvent.SUBMIT, myWindowSubmit);

private function myWindow(event:MyWindowEvent):void
{
    // Unsubscribing from events
    var myWindow:MyWindow = MyWindow(event.currentTarget);
    myWindow.removeEventListener(MyWindowEvent.SUBMIT, myWindowSubmit);
    // Changed data is passing with custom event object
    someData = event.someData;
}

And you should implement your custom event for that (MyWindowEvent in my pseudo code) and fire it from your TitleWindow component. You can read more about implementing custom event in documentation.