Using OnEvent("activate") to render block

[dsarosi <ds...@hotmail.com>]

I'm trying to render a block instead of the page when using an ajax call. 
This way, I can have a low-bandwidth and a high-bandwith (AJAX enabled
site).  

@Inject
@Property
private Block _content;

@OnEvent("activate")
Object activate()
{
    if (req.isXHR()) 
        return _content 
    Object page = validateUserSession();
    retrieveMailSetting();
    return page;
}

However, when I make the ajax call, i get the following error;

A component event handler
 method returned the value Block[content within mail/Compose, at
context:mail/Compose.tml, line 2, column
 25]. Return type org.apache.tapestry5.internal.structure.BlockImpl can not
be handled.  Configured return
 types are java.lang.Class, java.lang.String, java.net.URL,
org.apache.tapestry5.Link, org.apache.tapestry5
.StreamResponse, org.apache.tapestry5.runtime.Component.


Any suggestions?  
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Re: Using OnEvent("activate") to render block

[Ulrich Stärk <ul...@spielviel.de>]

I'm not 100% sure but I think returning a block only works with Zones. In all other cases, the rules 
as described here http://tapestry.apache.org/tapestry5/guide/pagenav.html apply.

Cheers,

Uli

dsarosi schrieb:
> I'm trying to render a block instead of the page when using an ajax call. 
> This way, I can have a low-bandwidth and a high-bandwith (AJAX enabled
> site).  
> 
> @Inject
> @Property
> private Block _content;
> 
> @OnEvent("activate")
> Object activate()
> {
>     if (req.isXHR()) 
>         return _content 
>     Object page = validateUserSession();
>     retrieveMailSetting();
>     return page;
> }
> 
> However, when I make the ajax call, i get the following error;
> 
> A component event handler
>  method returned the value Block[content within mail/Compose, at
> context:mail/Compose.tml, line 2, column
>  25]. Return type org.apache.tapestry5.internal.structure.BlockImpl can not
> be handled.  Configured return
>  types are java.lang.Class, java.lang.String, java.net.URL,
> org.apache.tapestry5.Link, org.apache.tapestry5
> .StreamResponse, org.apache.tapestry5.runtime.Component.
> 
> 
> Any suggestions?  


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