Re: Problem with AjaxFallbackDefaultDataTable in 1.4-SNAPSHOT wicket-1.4-20090709.154646-550.jar [SEC=UNCLASSIFIED]

[James Carman <jc...@carmanconsulting.com>]

There's a built-in component for toggling check boxes in a check group.

On Mon, Jul 13, 2009 at 7:04 PM, <Mi...@health.gov.au> wrote:
> Hello.
>
> I'm attempting a simple AjaxFallbackDefaultDataTable with using
> 1.4-SNAPSHOT and the wicket-1.4-20090709.154646-550.jar and
> wicket-extensions-1.4-20090709.154646-542.jar files.
>
> I get the following error:
> WicketMessage: Unable to find component with id 'label' in
> [MarkupContainer [Component id = header]]. This means that you declared
> wicket:id=label in your markup, but that you either did not add the
> component to your page at all, or that the hierarchy does not match.
> [markup =
> jar:file:/D:/bin/geronimo-jetty6-javaee5-2.1.4/repository/au/gov/doha/DataTable/1.0-SNAPSHOT/DataTable-1.0-SNAPSHOT.war/WEB-INF/lib/wicket-extensions-1.4-SNAPSHOT.jar!/org/apache/wicket/extensions/markup/html/repeater/data/table/HeadersToolbar.html
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> <wicket:panel>
>                 <tr class="headers">
>                                 <span wicket:id="headers">
>                                                 <th
> wicket:id="header"><span wicket:id="label">[header-label]</span></th>
>                                 </span>
>                 </tr>
> </wicket:panel>, index = 6, current = '<span wicket:id="label">' (line 20,
> column 27)]
>
> The only change I've done from the example given at
> http://www.wicket-library.com/wicket-examples/repeater/ is a column:
>                checked = new
> AbstractColumn<CheckedApplicationProcessDetails>(new
> Model<String>("Select")) {
>                        @Override
>                        public void populateItem(
>  Item<ICellPopulator<CheckedApplicationProcessDetails>> cellItem,
>                                String componentId,
>                                IModel<CheckedApplicationProcessDetails>
> model)
>                        {
>                                cellItem.add(new
> CheckBoxPanel(componentId, model));
>                        }
>
>                        @Override
>                        public Component getHeader(String componentId) {
>                                // select option
>                                AjaxCheckBox checkBox = new
> AjaxCheckBox("SelectAll", new PropertyModel(this, "selectAll")) {
>                                        // checkbox provides 'check all'
> or 'check none' functionality
>                                        @Override
>                                        protected void
> onUpdate(AjaxRequestTarget target) {
> // how do we access the items within a datatable?
> //                                              Iterator iter =
> table.getItems();
> //                                              table.modelChanging();
> //                                              while(iter.hasNext()) {
> //
> ((CheckedApplicationProcessDetails)((Item)iter.next()).getModelObject()).setChecked(ListFundingTenders.this.selectAll);
> //                                              }
> //                                              table.modelChanged();
> //                                              checkBoxChanged();
>  target.addComponent(table);
>                                        }
>                                };
>                                return checkBox;
>                        }
>                };
>                columns.add(checked);
>
> Basically I want a column with a check box for each row, and a
> select-all/select-none checkbox for the header.   I fail to see how this
> could cause the error given above.
>
> Is the error message a bug in the snapshot?  Or am I somehow causing it?
>
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