Yes, Alex, I finally got getDefinitionByName to help instantiate a
custom component as a class at runtime from a string (in a query-
result array). Your warning about needing to make sure the classes
are linked into the SWF was right on-the-mark!
I thought that by importing the components package, this made sure
all the component classes were included in the SWF. Apparently
not. Based on a suggestion from Gordon, I am declaring the class
with:
private static var clTestComp1:TestComp1 ...this works.
The problem is, like you say, you have to know the total set of
classes you want to use.
We are building a Dynamic UI, so we have an expanding list of
components that the user may be qualified to add to the application
at runtime. We don't want to have to declare all of the components
with hard-coded static vars. And, we can't know and declare today
the full list of classes that may be available in the future.
Can someone advise: Is RSL (runtime shared libraries) the best
practice for bringing in from the server only the components needed
at runtime? (note: In our application, a table at startup shows
which components the user is qualified for, the user may only click
to a sub-set of components they are qualified for. We want to add
those selected custom components as views to a ViewStack.)
Will RSL let us pull in (instantiate) selected component classes
from the strings in the query result array? Will we pull down the
whole RSL or just the classes that are needed?
Thanks
--- In [email protected], "Alex Harui" <[EMAIL PROTECTED]> wrote:
>
> getDefinitionByName and getDefinition. You will still need to
make sure
> the classes are linked into the SWF, so you have to know the total
set
> of classes you want to use.
>
>
>
> ________________________________
>
> From: [email protected]
[mailto:[EMAIL PROTECTED] On
> Behalf Of phall121
> Sent: Wednesday, June 06, 2007 8:50 AM
> To: [email protected]
> Subject: [flexcoders] Re: Selecting which Child Components to add
at
> runtime
>
>
>
> Alex's solution to the original challenge of selecting which Child
> components to add at runtime, worked very well with the
adjustments
> mentioned.
>
> However, the function to instantiate & add the Child component
> requires a class parameter dynamically specified at runtime.
>
> The mx.ComboBox approach described works...by surrounding the
> package/name of the component with curly braces, Flex manages to
> pass the actual component(reference) to the function.
> --So, the string of "{components.Comp1}" is passed as an actual
> class reference.
>
> But, to make the Dynamic UI "table-driven"...to specify which
Child
> components to add using an array...I must find a way in
ActionScript
> to convert the strings into the actual component reference. (Can't
> use the curly brace approach, since curly braces work in Flex, not
> Actionscript.)
>
> How, in AS, can you convert a string ("components.Comp1") into the
> actual reference to the component? This is very basic. I'm
> embarrassed to not know the answer. I've combed the docs and the
> FlexCoder archives.
>
> I tried explicit coercion or casting:
>
> private function fAddApps():void
> {
> var clComp:Class = Class(acCompList.getItemAt(2).compname);
> fAddCustomView(clComp);
> }
>
> private function fAddCustomView(compClass:Class):void
>
> This didn't work
>
> Does anyone have a suggestion?
>
