hi,
here is my code:
public class AttributeChoiceDto implements Serializable
{
public AttributeChoiceDto(String aId, String aName)
{
theId = aId;
theName = aName;
}
public String getId()
{
return theId;
}
public void setId(String aId)
{
theId = aId;
}
public String getName()
{
return theName;
}
public void setName(String aName)
{
theName = aName;
}
private String theId;
private String theName;
}
public class ChoiceOptions extends AbstractModel
{
public ChoiceOptions(List<AttributeChoiceDto> aOptions)
{
theOptions = aOptions;
}
public Object getObject(final Component component)
{
return theOptions;
}
public void setObject(final Component component, final Object object)
{
}
}
public class SymbolAddUpdate extends WebPage
{
public SymbolAddUpdate(PageParameters aParams)
{
addFeedback();
addPageTitle("Add/Update Symbol");
CompoundPropertyModel mySymbol = checkNewOrUpdate(aParams,
aParams.getString("theSymbolId"));
final Form myForm = new AddUpdateForm("form.symbol", mySymbol);
add(myForm);
TextField myName = new TextField("name");
final ChoiceOptions myOptions = new ChoiceOptions(
theDao.findAllCategoriesAsDto());
final ChoiceRenderer myRenderer = new ChoiceRenderer("name", "id");
final CategoryChoices myCategories = new CategoryChoices();
DropDownChoice myCat
= new DropDownChoice("categories", myCategories,
myCategories,myRenderer);
[...]
}
I hope this helps.
thanks,
florian
Igor Vaynberg wrote:
if you show me the exact code snippet that doesnt work that will give
me the necessary context.
-igor
On 5/17/07, *Florian Hehlen* < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
wrote:
Hi,
Thanks for the help... It's starting to make more sense to me
although still not working. The issue is definitely with the form
model. because all my sandbox experiments show me that it all goes
to hell when i introduce the model in the form. My form is a a
bean wrapped in a CompoundPropertyModel.
Maybe you can clarify below your explanation in that context.
florian
Igor Vaynberg wrote:
if you type it it looks like this
DDC<T>(String,IModel<T>,IModel<List<T>>,IChoiceRenderer<T>)
the first model is the one that holds the selection, the second
is the one that holds a list of available choices.
the constructor with a single model:
DDC<T>(String,IModel<List<T>>,IChoiceRenderer<T>)
is used when you use DDC in combination with a compound property
model on the form, in which case the ddc's id is used as a
property expression into form's model to determine the selection.
there is a great wiki page on models.
so try this
myForm.add(new DropDownChoice("select",new Model(),new
MyChoices(),myRenderer));
this will create a ddc with a null selection. its not practical,
because to get the selection you have to call
ddc.getmodelobject(), but it will at least get you going before
you decide on what model to use.
-igor
On 5/16/07, *Florian Hehlen* < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
wrote:
hi,
I am new to wicket so I am not sure how simple this issue is.
I am creating DropDownChoice components. I want to a) build
the the
Options from a list of Objects (not primitives) and b) want
to render
the option id and value as an attribute of the object in the
list. this
definitly works in the following sample code:
public class WicketSandbox extends WebPage
{
public WicketSandbox()
{
addPageTitle("Development Sandbox");
final Form myForm = new Form("form");
add(myForm);
final ChoiceRenderer myRenderer = new
ChoiceRenderer("name", "id");
myForm.add(new DropDownChoice("select",new
MyChoices(),myRenderer));
}
}
But as soon as I add an IModel to the form it seems that the
DropDownChoice looks up the choices in the form's IModel. I
have tried
to use the other constructors for the DropDownChoice which
require an
(String id, IModel model, IModel choices, IChoicerenderer
renderer) but
I can't figure out what is the difference between the 2
IModel objects
that have to be provided. If I provide twice a ref to the
same object I
get a different error:
The expression 'id' is neither an index nor is it a method
for the list class java.util.ArrayList
this is an improvement because it is accessing the right
object and
retrieving the list of choices but not extracting the the
objects from
the list as it does when I use (String id, IModel choices,
IChoicerenderer renderer).
In all cases if I remove the ChoiceRenderer my web page
builds and
displays but I see object.toString() values in my drop-downs.
Any tips or pointers would be greatly appreciated.
Florian Hehlen
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