How do I change the background color of an application while running a Flex 3.5 application?

Question

I have a Flex 3.5 application that will work for several purposes, and as part of the visual changes that I would like to indicate in order to indicate which mode the application is in, I want to change its background color.

Currently, the application tag looks like this:

<mx:Application 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    xmlns:com="ventures.view.component.*"
    xmlns:views="ventures.view.*"
    layout="absolute"
    preinitialize="onPreInitialize()"
    creationComplete="onCreationComplete()"
    applicationComplete="onApplicationComplete()"
    click="onClick(event)"
    enabled="{(!chainController.generalLocked)}"
    backgroundGradientColors="[0xFFFFFF, 0xFFFFFF]"
>

I tried using binding for attributes backgroundColorand backgroundGradientColors:

<mx:Application 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    ...
    backgroundColor="{app_background_color}"
>

- and -

<mx:Application 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    ...
    backgroundGradientColors="{app_background_color}"
>

but for the former binding it is not allowed, and for the latter there is a warning that:

Data binding will not be able to detect destinations for "app_background_color".

, , , , setStyle(), , , , , .

, <mx:Canvas></mx:Canvas>, , Div-itis HTML - .

?

Answer 1

StyleManager.getStyleDeclaration("Application").setStyle('backgroundColor', 'Red');

Answer 2

, mx: Application backgroundColor, :

mx.core.Application.application.setStyle('backgroundColor','green');