And, no, this is not the ideal place for a CPM. A CPM is most
commonly used on a form that has many form components below it that
directly edit items off of the form's model. ie:
new Form(new CPM(new Person()))
form.add(new Label("firstName")) <--- by using a CPM, you save
creating your own property model here
form.add(new Label("lastName")) <--- by using a CPM, you save
creating your own property model here
I have been using Wicket for several years, and I hardly ever use a
CPM. It's a shortcut that you can use if you choose to do so. But
it's nothing more than that. Like Igor said, you'll be better served
by understanding models first rather than understanding CPM.
--
Jeremy Thomerson
http://www.wickettraining.com
On Thu, Jun 25, 2009 at 6:22 PM, Jeremy
Thomerson<[email protected]> wrote:
> The problem in your example is not the CPM, but your data provider -
> where does it get it's list of items from?
>
> --
> Jeremy Thomerson
> http://www.wickettraining.com
>
>
>
>
> On Thu, Jun 25, 2009 at 6:07 PM, Hubbard, Bobby<[email protected]>
> wrote:
>> Does that mean what I am trying to do is not suited for
>> CompoundPropertyModel? :) Can you point me to some documentation that might
>> help me understand it better?
>>
>> -----Original Message-----
>> From: Igor Vaynberg [mailto:[email protected]]
>> Sent: Thursday, June 25, 2009 11:22 AM
>> To: [email protected]
>> Subject: Re: CompoundPropertyModel and nested DataView
>>
>> if you are a newbie do not use CPM it is a shortcut model more suited
>> for users who know and understand models well.
>>
>> -igor
>>
>> On Wed, Jun 24, 2009 at 5:35 PM, Hubbard, Bobby<[email protected]>
>> wrote:
>>> I am a Wicket newbie and am currently struggling with
>>> CompoundPropertyModel. I have found a lot on the list about
>>> CompoundPropertyModel but not regarding this specific issue. I am
>>> building a shopping cart. I have placed the cart's form inside a panel
>>> and the cart items (via DataView) are inside the form. ShoppingCart is a
>>> model that I would like to use to represent the current state of the
>>> entire cart. It contains a array of ShoppingCartItem 's. However, when
>>> running this, cartItems never gets set on the ShoppingCart model. While
>>> debugging, cartItems is a child of the panelForm, but never gets
>>> populated on the ShoppingCart pojo via CompoundPropertyModel. The form
>>> does persist and if I traverse the panelForm object I could figure out
>>> how to get to the ShoppingCartItem's...but I'd rather not. J
>>>
>>>
>>>
>>> What am I missing? Is there a better way to do this? See code attached
>>> below.
>>>
>>>
>>>
>>> Thanks!!
>>>
>>>
>>>
>>> <code>
>>>
>>> ...
>>>
>>> public CartPanel(String id) {
>>>
>>> super(id);
>>>
>>> Form panelForm = new Form("panelForm", new
>>> CompoundPropertyModel(new ShoppingCart())) {
>>>
>>> �...@override
>>>
>>> protected void onSubmit() {
>>>
>>> // need to rewrite cookie on update
>>>
>>> ShoppingCart cart = (ShoppingCart) getModelObject();
>>>
>>> System.out.println(cart.getCartItems());// check if
>>> cart items got populated
>>>
>>> }
>>>
>>> };
>>>
>>> add(panelForm);
>>>
>>>
>>>
>>> IDataProvider dataProvider = new ShoppingCartItemsProvider();
>>>
>>> DataView dataView = new DataView("cartItems", dataProvider) {
>>>
>>> �...@override
>>>
>>> protected void populateItem(final Item item) {
>>>
>>> final ShoppingCartItem cartItem = (ShoppingCartItem)
>>> item
>>>
>>> .getModelObject();
>>>
>>> item.add(new Label("itemName", cartItem.getName()));
>>>
>>> item.add(new TextField("quantity", new
>>> ShoppingCartItemModel(
>>>
>>> new Model(cartItem),
>>> ShoppingCartItemType.QUANTITY)));
>>>
>>> }
>>>
>>> };
>>>
>>> // add general text labels and buttons to the cart
>>>
>>> addFieldsAndButtons(panelForm);
>>>
>>> panelForm.add(dataView);
>>>
>>> }...
>>>
>>> </code>
>>>
>>>
>>>
>>> Thanks!!
>>>
>>>
>>>
>>>
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