Thank you, Igor! I had trouble subscribing to the mailing list. Just noticed your response on my Nabble Alert today. I also found out it by checking the source code of Check.java. Here is my code sample:
List<ItemI> selectedItems = (getSelectedList() == null ? new ArrayList() : new ArrayList (getSelectedList())); Form form = new MySelectItemForm ("form", selectedItems); add(form); final CheckGroup itemGroup = new CheckGroup ("group", selectedItems); form.add (itemGroup); List<ItemI> choiceList = getList(); ListView itemList = new ListView("item_list", choiceList ) { protected void populateItem(ListItem item) { item.add (new Check ("ckbox_item", item.getModel(), itemGroup)); ItemI t = (ItemI)item.getModelObject(); item.add (new Label("item_title", t.getName())); } }; itemGroup.add(itemList); CheckGroupSelector selectAll = new CheckGroupSelector ("groupselector_echan", itemGroup); if ( choiceList.size () == selectedItems.size()) { selectAll.add (new SimpleAttributeModifier ("checked", "checked")); } itemGroup.add (selectAll); I thought the CheckGroupSelector would set checked automatically if it sees the itemGroup has the same collection as the choiceList. But it does not. igor.vaynberg wrote: > > just like with any choice component in wicket, items are checked if > they are contained in the same collection model they would be put in > on submit, so in your case if the collection that is the model object > of the checkgroup contains the same value as the check's model object > the check is checked. > > -igor > > On Wed, Apr 29, 2009 at 12:54 PM, OjO <fang...@washington.edu> wrote: >> >> With CheckBox, I can pass in the Boolean value. But with Check, how do I >> let >> it know the item should be displayed as checked initially? >> >> OjO wrote: >>> >>> How does the Check object determine if the checkbox should be tagged as >>> checked? >>> >>> >>> >>> igor.vaynberg wrote: >>>> >>>> in the example checkgroup inherits a property of the >>>> compoundpropertymodel as its model. i suggest you read the models wiki >>>> page. >>>> >>>> -igor >>>> >>>> On Fri, May 23, 2008 at 8:36 AM, seanblaes <sean.bl...@hifiit.com> >>>> wrote: >>>>> >>>>> That's how the example at >>>>> http://wicketstuff.org/wicket13/compref/?wicket:bookmarkablePage=%3Aorg.apache.wicket.examples.compref.CheckGroupPage >>>>> shows it. I added an empty ArrayList as the model, and it works now. >>>>> Should I send a message to the bugs list to update the examples page >>>>> above? >>>>> >>>>> >>>>> I did note that when you view the source of the example, it uses the >>>>> empty >>>>> ArrayList approach I'm using now. >>>>> >>>>> >>>>> igor.vaynberg wrote: >>>>>> >>>>>> CheckGroup group = new CheckGroup("merchantCheckboxGroup", >>>>>> **model**); >>>>>> >>>>>> you are never setting the model you are passing in. >>>>>> >>>>>> -igor >>>>>> >>>>>> On Fri, May 23, 2008 at 12:09 AM, seanblaes <sean.bl...@hifiit.com> >>>>>> wrote: >>>>>>> >>>>>>> Hello all, I'm beating my head on the wall and not really sure what >>>>>>> I'm >>>>>>> doing >>>>>>> wrong... :( >>>>>>> >>>>>>> I am attempting to use a CheckGroup to contain several choices - >>>>>>> maybe >>>>>>> it's >>>>>>> even the wrong way to go about it. I followed the example on the >>>>>>> Wicket >>>>>>> webpage, but it's not working for me. >>>>>>> >>>>>>> Here's my HTML: >>>>>>> >>>>>>> <input type="checkbox" name="filter_by_merchant" >>>>>>> id="filter_by_merchant" >>>>>>> wicket:id="filterByMerchantCheckbox" value="1" onchange="var >>>>>>> l=$('optional_filter_by_merchant'); if (this.checked){l.show()} else >>>>>>> {l.hide()}"/> >>>>>>> <label for="filter_by_merchant">Merchant</label> >>>>>>> >>>>>>> <ul id="optional_filter_by_merchant" class="inline optional-indent"> >>>>>>> <li wicket:id="merchants"> >>>>>>> <input type="checkbox" >>>>>>> name="filter_by_merchant_rich_clicks" >>>>>>> id="filter_by_merchant_rich_clicks" >>>>>>> wicket:id="merchantCheckboxComponent" >>>>>>> /> >>>>>>> <label for="filter_by_merchant_rich_clicks" >>>>>>> wicket:id="merchantCheckboxLabel">Rich Clicks</label> >>>>>>> </li> >>>>>>> </ul> >>>>>>> >>>>>>> >>>>>>> >>>>>>> And I have a method to populate this section: >>>>>>> >>>>>>> private CheckGroup createMerchantFilterMerchantsCheckboxes(Model >>>>>>> model) { >>>>>>> CheckGroup group = new CheckGroup("merchantCheckboxGroup"); >>>>>>> ListView merchants = new ListView("merchants", >>>>>>> MerchantOption.loadOptions()) { >>>>>>> private static final long serialVersionUID = 1L; >>>>>>> >>>>>>> protected void populateItem(ListItem item) { >>>>>>> item.add(new >>>>>>> Check("merchantCheckboxComponent")); >>>>>>> item.add(new Label("merchantCheckboxLabel", >>>>>>> new >>>>>>> PropertyModel(item.getModel(), "value"))); >>>>>>> } >>>>>>> }; >>>>>>> group.add(merchants); >>>>>>> >>>>>>> return group; >>>>>>> } >>>>>>> >>>>>>> >>>>>>> When I call this method from my page class, it's pretty simple: >>>>>>> >>>>>>> ReportTypeOption def = new ReportTypeOption(); >>>>>>> Model model = new Model(def); >>>>>>> setModel(model); >>>>>>> Form form = new Form("reportForm"); >>>>>>> add(form); >>>>>>> form.add(createMerchantFilterMerchantsCheckboxes(model)); >>>>>>> >>>>>>> >>>>>>> But, every time I hit the page, it throws >>>>>>> "org.apache.wicket.WicketRuntimeException: CheckGroup >>>>>>> [0:reportForm:merchantCheckboxGroup] contains a null model object, >>>>>>> must >>>>>>> be >>>>>>> an object of type java.util.Collection". >>>>>>> >>>>>>> From what I can tell, this code is exactly like what's on the demo >>>>>>> page. >>>>>>> Further, I've tried reading all the docs I can find and have even >>>>>>> tried >>>>>>> stepping through the code. But, I'm not getting anywhere. Does >>>>>>> anybody >>>>>>> have any ideas on how to get that model populated? It's complaining >>>>>>> that >>>>>>> the CheckGroup doesn't have a model associated, not the Check, and >>>>>>> indeed >>>>>>> it's not initialized with a model. Should it be? Which one? >>>>>>> -- >>>>>>> View this message in context: >>>>>>> http://www.nabble.com/Null-model-with-CheckGroup-tp17419490p17419490.html >>>>>>> Sent from the Wicket - User mailing list archive at Nabble.com. >>>>>>> >>>>>>> >>>>>>> --------------------------------------------------------------------- >>>>>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>>>>>> For additional commands, e-mail: users-h...@wicket.apache.org >>>>>>> >>>>>>> >>>>>> >>>>>> --------------------------------------------------------------------- >>>>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>>>>> For additional commands, e-mail: users-h...@wicket.apache.org >>>>>> >>>>>> >>>>>> >>>>> >>>>> -- >>>>> View this message in context: >>>>> http://www.nabble.com/Null-model-with-CheckGroup-tp17419490p17427924.html >>>>> Sent from the Wicket - User mailing list archive at Nabble.com. >>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>>>> For additional commands, e-mail: users-h...@wicket.apache.org >>>>> >>>>> >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>>> For additional commands, e-mail: users-h...@wicket.apache.org >>>> >>>> >>>> >>> >>> >> >> -- >> View this message in context: >> http://www.nabble.com/Null-model-with-CheckGroup-tp17419490p23301416.html >> Sent from the Wicket - User mailing list archive at Nabble.com. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >> For additional commands, e-mail: users-h...@wicket.apache.org >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org > > > -- View this message in context: http://www.nabble.com/Null-model-with-CheckGroup-tp17419490p23336823.html Sent from the Wicket - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org