In ActionScript, one can use values from 0 to 1 to represent 0% to 100% and any values above 1 will cause
an increase in scale (or whatever parameter is being affected). The same is true for CSS/HTML. Have you tried this with flex? Can you input a value of 200%? On the same line can you input a ratio which reflects the dimensions of the desired result, if you know the target dimensions of your user's screen?
There is also a value in HTML when you publish a Flash file (FLA>SWF) that is called "allowfullscreen" and you can set it to "true". At least I believe that is what I saw the last time I checked a published HTML file for Flash . . .
Well I know that you can use scaleX to grow an image but I want to just scale it to fit 100% of its parent container. It scales, but will stop when it reaches a wall on one side without distorting the screen...
I have seen Flash content on the web that has a "Full Screen" button that you can click to expand the FLV or whatever is on the SWF page to fit the full screen of the browser. Perhaps you could find such a hook in Flex. I simply haven't learned it yet but I know it's possible to do. An example would be a YouTube video which you can click on the button to fit it to the Full Screen dimensions. The button looks like an X with the arrows of the X extending outward to the 4 corners of the screen. Whatever that code is to hook into that button's functionality is what you need.
I believe you can do this with the spark BitmapImage component: <s:BitmapImage fillMode="scale" .../>
You need to set the maintainAspectRatio="false" on Image control in order to stretch/scale to the full dimensions of its container.
<mx:Image source="assets/background.png" x="0" y="0" width="100%" height="100%" maintainAspectRatio="false" />
By default maintainAspectRatio="true" and it might not stretch fully..So make it to false.