Repeater with checkbox

[Jurrie Overgoor <ju...@2go-mobile.nl>]

Hello everyone,

I'm currently creating a Wicket application, and for this I need a 
repeater that lets the user select multiple rows from a list of items. 
So basically a repeater that adds a checkbox in front of every item. Is 
this component available? I remember seeing this somewhere, but I forgot 
where, and I can't seem to find it again.

-- 
With kind regards,
Jurrie Overgoor
2go-mobile b.v.

Re: Repeater with checkbox

[Hannes Schubert <in...@tele2.de>]

Jurrie,

this goes very well. I use check boxes in repeaters for the same reason. 
Just have a look at the following snippets.

....
        dynamicContents.add(listView = new DataView("whatever", 
getDataProvider(), 15)
        {
            @Override
            protected void populateItem(Item listItem) {
                final Whatever whatever = 
(Whatever)listItem.getModelObject();

                //log.debug("populateItem() 
whatever="+whatever.getControlnumber()+" => 
"+selection.contains(whatever.getId()));
                final SelectionModel<Whatever> selectionModel = new 
SelectionModel<Whatever>(whatever, selection.contains(whatever.getId()));
                final CheckBox checkBox = new AjaxCheckBox("selected", 
selectionModel) {
                    @Override
                    public void onUpdate(AjaxRequestTarget target) {
                        Boolean selected = selectionModel.getObject();
                        Long id = selectionModel.getSelection().getId();
                        if (selected)
                            selection.add(id);
                        else
                            selection.remove(id);
                       
                        log.debug("selected.onUpdate: "+selected+" for 
id="+id);
                    }
                };
                checkBox.setOutputMarkupId(true);
                checkBox.setVisible(selectionEnabled);
               
                selectionBoxes.put(selectionModel, checkBox);
               
                listItem.add(checkBox);               
               
                listItem.add(new Label("dmcControlnumber", new 
PropertyModel(whatever, "controlnumber")));
...

This requires a simple class what simply reflects the selection state of 
the selected/unselected rows collected in a map. It is a bit tricky if 
you start up with some rows already selected and dataproviders 
supporting lazy loads . Then you might have to setup the selection 
models on creation only for visible rows and merge afterwards.

Best regards
Hannes

Jurrie Overgoor wrote:
> Hello everyone,
>
> I'm currently creating a Wicket application, and for this I need a 
> repeater that lets the user select multiple rows from a list of items. 
> So basically a repeater that adds a checkbox in front of every item. 
> Is this component available? I remember seeing this somewhere, but I 
> forgot where, and I can't seem to find it again.
>
> ------------------------------------------------------------------------
>
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