And this is CatogoryModel class:
public class CategoryModel implements Serializable {
private static final long serialVersionUID = 1L;
private List<OmCategory> omCategories;
private OmCategory selectedCategory;
public CategoryModel(List<OmCategory> omCategories) {
this.omCategories = omCategories;
}
public List<OmCategory> getOmCategories() {
return omCategories;
}
public void setOmCategories(List<OmCategory> omCategories) {
this.omCategories = omCategories;
}
public OmCategory getSelectedCategory() {
return selectedCategory;
}
public void setSelectedCategory(OmCategory selectedCategory) {
this.selectedCategory = selectedCategory;
}
}
On Mon, Aug 1, 2011 at 12:05 AM, ramazan pekin <[email protected]> wrote:
> Actually, as you said, when I add new bounded object to the collection
> new listChoice has been added to page, but whenever I tried to remove
> object from collection, related listChoice is not being removed from
> page. I have added wrapping container and I specified as target
> component to listChoice's onchange action. As result, I have added
> "item.remove(listChoice);" to code but this time, exception raised.
>
> I think I am using ListView wrongly, main problem looks like ListView
> related model object. This is my current markup file content.
>
> <body>
> <form wicket:id="form">
> <table wicket:id="categoryContainer">
> <tr>
> <td wicket:id="categoryList">
> <select wicket:id="category"/>
> </td>
> </tr>
> </table>
> <input type="submit" value="Submit"/>
> </form>
> </body>
>
> On Sun, Jul 31, 2011 at 11:02 PM, Christian Huber <[email protected]>
> wrote:
>> Hi,
>>
>> this is just a wild guess but in your code you have line that calls
>> "item.remove(listChoice);" under certain conditions and the listChoice
>> instance is bound to the category identifier which does not seem right to
>> me.
>>
>> As far as I understand ListViews the associated markup block is created for
>> each item. If you remove the listChoice from an item then Wicket has no
>> object to associate the markup with. So I think you cannot remove the choice
>> that way.
>>
>> I have a similar use case where I also add and remove objects to and from
>> ListViews via Ajax and it was sufficient to just remove the object from the
>> collection that the ListView relies on and add the wrappign container to the
>> ajax target.
>>
>> Since the listChoice is the only thing you add to an item I figure that
>> could also be feasible for your case but as said before this is just a
>> hunch.
>>
>> HTH, Chris
>>
>> --
>> The Sanity Resort <http://sanityresort.blogspot.com/>
>>
>> Am 31.07.2011 21:06, schrieb ramazan pekin:
>>>
>>> Hi to everyone,
>>>
>>> I am trying to generate dynamic form elements. I need to add and
>>> remove some components dynamically. I have added listChoice component
>>> succesfuly whenever user select a listChoice item, but when I tried to
>>> remove listChoice component, I received an error like that:
>>>
>>>
>>> org.apache.wicket.DefaultExceptionMapper.internalMap(DefaultExceptionMapper.java:102)
>>> - Unexpected error occurred
>>> org.apache.wicket.markup.MarkupException: Unable to find component
>>> with id 'category' in [ListItem [Component id = 1]]. This means that
>>> you declared wicket:id=category in your markup, but that you either
>>> did not add the component to your page at all, or that the hierarchy
>>> does not match.
>>> .....Page.html
>>> <td wicket:id="categoryList">
>>>
>>> <select wicket:id="category"></select>
>>> </td>, index = 2, current = '<select
>>> wicket:id="category">' (line 16, column 18)]
>>> at
>>> org.apache.wicket.markup.MarkupStream.throwMarkupException(MarkupStream.java:536)
>>>
>>>
>>> This is form code:
>>>
>>> public class DynamicForm extends Form {
>>>
>>> private static final long serialVersionUID = 1L;
>>>
>>> final ListView<CategoryModel> listView;
>>>
>>> private List<CategoryModel> categories;
>>>
>>> public DynamicForm(String id) {
>>> super(id);
>>>
>>> categories = new ArrayList<CategoryModel>();
>>> categories.add(new CategoryModel(masterCategories));
>>>
>>> final WebMarkupContainer listContainer = new
>>> WebMarkupContainer("categoryContainer");
>>> listView = new ListView<CategoryModel>("categoryList", categories) {
>>>
>>> private static final long serialVersionUID = 1L;
>>>
>>> @Override
>>> protected void populateItem(final ListItem<CategoryModel> item) {
>>> final CategoryModel category = item.getModelObject();
>>> ListChoice<OmCategory> listChoice = new ListChoice<OmCategory>(
>>> "category",
>>> new PropertyModel<OmCategory>(category, "selectedCategory"),
>>> masterCategories,
>>> new IChoiceRenderer<OmCategory>() {
>>> private static final long serialVersionUID = 1L;
>>>
>>> public Object getDisplayValue(OmCategory omCategory) {
>>> return omCategory.getCategoryCode().getLocalized();
>>> }
>>>
>>> public String getIdValue(OmCategory omCategory, int index) {
>>> return omCategory.getRowId();
>>> }
>>> }
>>> );
>>> listChoice.add(new AjaxFormComponentUpdatingBehavior("onchange") {
>>> private static final long serialVersionUID =
>>> 5417882427051940952L;
>>>
>>> @Override
>>> protected void onUpdate(AjaxRequestTarget target) {
>>> if(categories.size()> 1&& (categories.indexOf(category)
>>> + 1) != categories.size()) {
>>> categories = new
>>> ArrayList<CategoryModel>(categories.subList(0,
>>> (categories.indexOf(category) + 1)));
>>> }
>>> categories.add(new CategoryModel(masterCategories));
>>> target.add(listContainer);
>>> }
>>> });
>>> if(categories.indexOf(item.getModelObject()) != -1) {
>>> item.add(listChoice);
>>> } else {
>>> item.remove(listChoice);
>>> }
>>> }
>>> };
>>> listView.setOutputMarkupId(true);
>>> listContainer.add(listView);
>>> listContainer.setOutputMarkupId(true);
>>> add(listContainer);
>>> }
>>> }
>>>
>>>
>>> First time I am developing with wicket, and maybe I use wrongly. I'm
>>> new and any feedback is appreciated... Sorry for my english :)
>>>
>>> Br.
>>> Ramazan
>>>
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>>>
>>
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