Actionscript base class in Flex AIR app
- by Alan
I'm trying to build a Flex AIR app using Flex Builder 3, which I'm just getting started with.
In Flash CS4, there's a text field in the authoring environment where you can specify a class that will become the "base" class - your class inherits from Sprite and then "becomes" the Stage at runtime. Is there a a way to do the same thing with Flex/AIR? Failing that, can anyone explain how to create and use an external class?
Originally I had this in TestApp.mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script source="TestApp.as"/>
</mx:WindowedApplication>
And this in TestApp.as:
package {
public class TestApp {
public function TestApp() {
trace('Hello World');
}
}
}
That gives the error "packages cannot be nested", so I tried taking out the package statement:
public class TestApp {
public function TestApp() {
trace('Hello World');
}
}
That gives an error "classes cannot be nested", so I finally gave up and tried to take out the class altogether, figuring I'd try to start with a bunch of functions instead:
function init() {
trace('Hello World');
}
But that gives the error "A file found in a source-path must have an externally visible definition. If a definition in the file is meant to be externally visible, please put the definition in a package".
I can't win! When I put my class in a package, it says I can't do that because it would be nested. When I don't, it says it needs to be in a package so it can be seen.
Does anyone know how to fix this? If I can't do the custom-class-as-base-class thing, is there a way I could just have it like:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script source="TestApp.as"/>
<mx:Script>
var app = new TestApp();
</mx:Script>
</mx:WindowedApplication>
At the moment I can't import the class definition at all, so even that won't work.
Thanks in advance!
