CheckGroup and Check work like this:
CheckGroup<T>(String id, IModel<Collection<T>> selected);
Check<T>(String id, IModel<T>)
so checkgroup has the model that holds your selection of objects of
type T, while each Check component's model contains an item of type T.
when you submit the form checkgroup's selection is cleared and
populated with instances of T from all selected Check components.
CheckBox is different. CheckBox has a model of type Boolean. if
model.getobject() returns true checkbox renders checked, if false
checkbox renders unchecked. Same for when the form is submitted: if
checked checkbox calls model.setobject(true), if not
model.setobject(false)
all of this should be explained in the javadoc...
so assuming you have
class Role{}
class User { Set<Role> getRoles(); } and you want to use CheckBox, its
model would look like this
class checkboxmodel implements imodel {
private final IModel<Role> role;
private final IModel<Collection<Role>> selection;
// constructor that takes role and selection
object getObject() {
return
((Collection<Role>)selection.getObject()).contains(role.getObject());
}
void setObject(Object object) {
boolean selected=(Boolean)object;
if (selected) {
((Collection<Role>)selection.getObject()).add(role.getObject()); }
else { ((Collection<Role>)selection.getObject()).remove(role.getObject());
}
}
void detach() {
selection.detach();
role.detach();
}
}
and used like this - assuming listview iterates over all possible roles
final IModel user=...
listview.populateItem(Item item) {
IModel role=item.getModel();
item.add(new CheckBox("role", new CheckBoxModel(user, role));
}
hope this helps get you started
-igor
On Fri, Mar 14, 2008 at 1:27 PM, Greg Dunn <[EMAIL PROTECTED]> wrote:
> Sorry if I'm being dense. I'm coming to Wicket from the Struts world.
> ;)
>
> The roles beans in the collection have a Boolean property 'hasRole'
> which I use to set the checkbox state. It has other properties I use to
> display the descriptions.
>
> Maybe it will be helpful for me to explain why the rolesGroup object
> gets passed on when I use Check but not when I use CheckBox.
>
> That said, I don't really need to use a CheckGroup, I did that because
> the list of roles isn't fixed, I need to get the latest set from the
> database. Would it be easier to just use a series of checkboxes and (if
> it's not too much trouble) how could I go about that?
>
> Thanks
>
> Greg
>
>
>
>
> -----Original Message-----
> From: Igor Vaynberg [mailto:[EMAIL PROTECTED]
> Sent: Friday, March 14, 2008 10:59 AM
> To: users@wicket.apache.org
> Subject: Re: CheckGroup, CheckBox and Check
>
> checkgroup's model is the selection mode, so it should be bound to
> user's assigned roles list, not the list of all available roles.
>
> -igor
>
> On Fri, Mar 14, 2008 at 7:45 AM, Greg Dunn <[EMAIL PROTECTED]> wrote:
> >
> > I've got a collection of beans ("roles") containing user
> authorization
> > roles that I'm using as the Model for a ListView. I'm confused by
> the
> > interaction between CheckGroups, Check's and CheckBox's. If I use
> > CheckBox my roles show up selected if the user has the role, but I
> can't
> > get the Model Object when I submit. If I use Check the roles the
> user
> > has do not show up selected, but I get the Model Object after I
> submit.
> >
> > My code for creating the CheckGroup ListView:
> >
> > rolesGroup = new CheckGroup("rolesGroup", roles);
> > add(rolesGroup);
> > ListView rolesList = new ListView("roleList", roles) {
> > protected void populateItem(ListItem item) {
> > item.add(new CheckBox("roleCheck", new
> > PropertyModel(item.getModel(), "hasRole")));
> > item.add(new Label("description", new
> > PropertyModel(item.getModel(), "description")));
> > item.add(new Label("groupId", new
>
>
> > PropertyModel(item.getModel(), "groupId")));
> > }}.setReuseItems(true);
> > rolesGroup.add(rolesList);
> > rolesGroup.add(new
> > CheckGroupSelector("rolesGroupSelector"));
> >
> >
> > And getting the model object in onSubmit():
> >
> > List userRoles = (List) rolesGroup.getModelObject();
> >
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> >
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