Yes, it's a workaround, and it has limitations which I mention in JumpStart 6
where we were trying not to lose the filter's partialName:
http://jumpstart.doublenegative.com.au/jumpstart/together/ajaxcomponentscrud/persons
In that example:
@Property
// If we use @ActivationRequestParameter instead of @Persist, then our
handler for filter form success would have
// to render more than just the listZone, it would have to render all other
links and forms: it would need a zone
// around the "Create..." link so it could render it; and it would render
the editorZone, which would be destructive
// if the user has been typing into Create or Update. Alternatively, it
could use a custom JavaScript callback to
// update the partialName in all other links and forms - see
AjaxResponseRenderer#addCallback(JavaScriptCallback).
@Persist
private String partialName;
Instead, I'm suggesting that if we make Grid behave like Form, EventLink, and
ActionLink, then we won't need workarounds, as shown here:
http://jumpstart.doublenegative.com.au/jumpstart7/together/ajaxcomponentscrud/persons
Cheers,
Geoff
On 25/02/2014, at 12:10 AM, Dmitry Gusev wrote:
> Hi Geoff,
>
> another way to handle this situation (a workaround?) is by using
> @ActivationRequestParameter("paramName") attribute on page properties.
> This is what I do for my projects and what's working for me.
>
>
>
> On Mon, Feb 24, 2014 at 4:20 PM, Geoff Callender <
> [email protected]> wrote:
>
>> To participate in nested components in an AJAX page we can utilise Form's,
>> EventLink's, and ActionLink's context parameter. It can be used to pass the
>> parameters of the enclosing component. The containing component's event
>> handlers can receive the context and set its parameters from them before
>> making any decisions. This works well.
>>
>> However, Grid doesn't have a context parameter. Consequently, when the
>> user chooses a new page in a GridPager, or a new sort order in a Grid
>> column, the containing component doesn't know the context and consequently
>> might not be able to render the Grid correctly.
>>
>> I've produced an example, in which I've created a GridWithContext to wrap
>> a Grid, and modified GridPager to include the context in its links and
>> bubble up a new event with the context. It's in JumpStart 7.0 preview-6:
>>
>> http://jumpstart.doublenegative.com.au/jumpstart7/
>>
>> Without this, I would lose the selectedPersonId when I a GridPager link.
>>
>> So I think Grid needs a context. Or is there another existing way to
>> handle this problem?
>>
>> There's an existing JIRA for this.
>> https://issues.apache.org/jira/browse/TAP5-1162
>>
>> Cheers,
>>
>> Geoff
>>
>>
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>
>
> --
> Dmitry Gusev
>
> AnjLab Team
> http://anjlab.com
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