You manipulated the prototype? As in you worked
on A.prototype…? I can’t see how that would work in MXML and do
the right thing. In order to understand the attribute we need to see the
[Event] metadata on the class definition, this means having access to the
source. Assuming you do have access to the source your [Event] metadata should
be inherited by the subclasses. It’s sounding like that’s not
happening for you. I think we’ll need to see a working (or I guess in
this case non-working) example, not just pseudocode to see if we can figure out
what’s going on.
Matt
Hello,
I already commented this but the message appears
to have
disappeared - another try.
Explanation:
In the Application AS file, the prototype of a
standard class A is
manipulated so that the class has event E. The
event is dispatched
with "this.dispatchEvent({target:this,type:"E",...});
Now if I specify an event handler in an MXML file
like <mx:A id="id"
E="doSomething()"/>, everything works
just fine.
But: I also want to use class B which extends
class C extending
class A, ie. B is a subclass of A. If I write like
before <mx:B
id="id"
E="doSomethingElse()"/>, the compiler says that the E
attribute is unknown.
So, this E event has to be declared all over again
for class B??
What exactly does this mean?
Satu
--- In [email protected],
"Matt Chotin" <[EMAIL PROTECTED]>
wrote:
> All [Event] metadata is inherited by the
subclass so you shouldn't
have
> any problems. But you can't dispatch
the event, you have to have
it
> declared on the class definition for MXML to
pick it up.
>
>
>
> Matt
>
>
>
> ________________________________
>
> From: [email protected]
[mailto:[email protected]]
On
> Behalf Of svktiilikainen
> Sent: Monday, August 01, 2005 1:48 AM
> To: [email protected]
> Subject: [flexcoders] Custom event &
inheritance
>
>
>
> Hi all,
>
> how should a custom event be used in
subclasses?
>
> I have a custom event specified in the
prototype of an AS class,
say
> ScrollSelectList. Now I want to use the event
in an instance of a
> subclass of ScrollSelectList, say DataGrid.
If I just write
something
> like
> <mx:DataGrid id="myGrid"
event-name="function-name">,
> 'event-name' being the event to catch, Flex
throws an error
> "unknown attribute 'event-name' on
myGrid".
> The event handling works just fine when used
in the parent
> (ScrollSelectList) class instance.
>
> Should the event be declared somehow for
subclass as well?
>
> Thanks,
> Satu
>
>
>
>
> --
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