Question about global variable scope in mxml

Question

Let's say I have two files, myApp.mxml and EntryClass.as, as
attached at the end of this post.
Why does mxmlc complain with this error message:
quote:
/path/to/EntryClass.as(4): col: 7 Error: Access of undefined
property myChart.
myChart.graphics.drawRect(100,100,100,100);
^
According to devguide_flex3.pdf,
quote:
The IDs for all tags in an MXML component, no matter how
deeply nested they are, generate public variables of the component
being defined. As a result, all id properties must be unique within
a document. This also means that if you specified an ID for a
component instance, you can access that component from anywhere in
the application: from functions, external class files, imported
ActionScript files, or inline scripts.
So how does one reference these public variables?

Answer 1

"slinabery" <[email protected]> wrote in
message
news:gbtnji$f03$[email protected]..
> Let's say I have two files, myApp.mxml and
EntryClass.as, as attached at
> the
> end of this post.
>
> Why does mxmlc complain with this error message:
>
quote:
/path/to/EntryClass.as(4): col: 7 Error: Access of undefined
property
> myChart.
>
> myChart.graphics.drawRect(100,100,100,100);
> ^
>
>
> According to devguide_flex3.pdf,
>
quote:
The IDs for all tags in an MXML component, no matter how
deeply nested
> they
> are, generate public variables of the component being
defined. As a
> result, all
> id properties must be unique within a document. This
also means that if
> you
> specified an ID for a component instance, you can access
that component
> from
> anywhere in the application: from functions, external
class files,
> imported
> ActionScript files, or inline scripts.
>
> So how does one reference these public variables?
>
> myApp.mxml:
>
> <?xml version="1.0"?>
> <mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
> applicationComplete="EntryClass.main()">
> <mx:Panel>
> <mx:VBox id="myChart" width="900" height="300" />
> </mx:Panel>
> </mx:Application>
>
> EntryClass.as:
>
> package {
> public class EntryClass {
> public static function main():void {
> myChart.graphics.drawRect(100,100,100,100);
> }
> }
> }
http://www.magnoliamultimedia.com/flex_examples/Amys_Flex_FAQ.pdf
Third question.