two suggestions,
1)emptyrow.setoutputmarkupplaceholdertag(true) instead of
setoutputmarkupid(true).
2)you can use dataview.getitemscount() instead of data.size() as later can
be expensive.

On Sun, Feb 14, 2010 at 8:11 AM, <b...@actrix.gen.nz> wrote:

> Hi all,
>
> How is it possible to dynamically show and hide an additional dummy
> row "No items to show" below a DataView?
>
> I tried this with code similar to code below but it does not work even
> though isVisible() is called. I have a small testcase ready to go.
> It's quite basic so I must be missing something obvious.
>
> Many thanks
>
> Bernard
>
>
> In a DataView, with an AjaxFallbackLink delete action, in onClick I do
> something like
>
> item.setVisible(false);
> target.addComponent(item);
> target.addComponent(emptyRow);
>
> with emptyRow as follows:
>
>        final WebMarkupContainer emptyRow = new
> WebMarkupContainer("emptyRow"){
>            @Override
>            public boolean isVisible(){
>                return rowProvider.size() == 0;
>            }
>        };
>        emptyRow.setOutputMarkupId(true);
>        add(emptyRow);
>
> In HTML:
>
>        <tr wicket:id="dataRow">
>            <td wicket:id="Id">ID</td>
>            <td><a wicket:id="delete">Delete</a></td>
>        </tr>
>        <tr wicket:id="emptyRow">
>            <td colspan="2">No Items to show</td>
>        </tr>
>
>
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>


-- 
regards,
Vineet Semwal

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