Thank you for your e-mail, Christian.
I've already fixed it using the [retval] attribute and I was able to retrieve
the string from my xpcom component
But another problem surfaces.
I can explain what I need.
I need to affect the value of a <label> overlay element on my extension with a
string obtained from component.
I've tried to do it with this in js
label = document.getElementById("user_name_label");
label.value = data;
But the problem is when should I call this statements. they work but only when
the browser is already displayed.
If I use these instructions before nothing changes on label.
Is there any event I can trap to place this instructions on?
I guess label doesnt have events
Thanks in advance
Cheers,
Oliveiros
----- Original Message -----
From: "Christian Biesinger" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, July 07, 2006 6:30 PM
Subject: Re: How to pass values in XPCOM back to JS
> Oliveiros Cristina wrote:
>> void ObtainUser(out string str_user_name);
>
> If you instead defined it as:
> string Obtainuser();
> Then it'd be a function with no arguments in JS that just returns the
> string.
>
>> I've tried to call the function with one arguments, but I get an exception
>> like this :
>>
>> Erro: uncaught exception: [Exception... "'Out' argument must be an object
>> arg 0 [nsIFoxPanel.ObtainUser]" nsresult: "0x80570002
>> (NS_ERROR_XPC_NEED_OUT_OBJECT)" location: "JS frame ::
>> chrome://extensao/content/foxpanel.js :: <TOP_LEVEL> :: line 34" data: no]
>
> I don't know what your argument was but out params works like this:
>
> var outval = {};
> panel.ObtainUser(outval);
> // Now use outval.value
>
> But I'd suggest you use the IDL syntax I suggested above and do:
> var yourstring = panel.ObtainUser();
>
> --
> All the world's a stage,
> And all the men and women merely players:
> They have their exits and their entrances;
> And one man in his time plays many parts, [...] --W. Shakespeare
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> dev-tech-xpcom mailing list
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