you are passing a list of enum objects into the list model of the dropdown
choice, that means the one selected object out of that list - of type enum -
will be set into the model object.
so there are two ways to do this
you can pass in a list of ints into the choice component, that way the
selected int will be set into your model
or you can write a model decorator that does the transform
class SizeEnumToIntModel extends Model {
private final IModel delegate;
public SizeEnumToIntModel(IModel delegate) {
this.delegate=delegate; }
public Object getObject(Component c) {return Size.forValue(
delegate.getObject(c); // convert int to enum }
public void setObject(Component c, Object o) {
delegate.setObject(((Size)o).getintvalue();
// convert enum to int }
public void detach() { delegate.detach(); }
}
then
new DropDownChoice(id, new SizeEnumToIntModel(new PropertyModel(form,
"size"))....
you lose the nice compound model syntax, but oh well
you might also be able to use a convert to accomplish the same, but i havent
looked into that
-igor
On 12/30/06, Flavius <[EMAIL PROTECTED]> wrote:
I tried this:
DropDownChoice severityChoice = new
DropDownChoice("size",
Arrays.asList(SIZE.values()),
new ChoiceRenderer()
{
public Object getDisplayValue(Object
object)
{
return ((SIZE)object).getName();
}
public String getIdValue(Object object,
int index)
{
return ((SIZE)object).getId();
}
});
The page renders fine. But when I submit the form, I get this error:
WicketMessage: unable to set object Small, model:
Model:classname=[wicket.model.CompoundPropertyModel]
Root cause:
wicket.util.convert.ConversionException: Cannot parse 'Small' using format
[EMAIL PROTECTED]
at
wicket.util.convert.converters.AbstractConverter.newConversionException(
AbstractConverter.java:72)
As I understand it, it's trying to set an int in the Shirt model for size,
but the drop down returned the Small object. What I really need is
Small.getId(). So I need to tell the form to bind the id property of the
return object to the field "size"
Nick Heudecker wrote:
>
> IChoiceRenderer allows you to specify the id and display values for a
> DropDownChoice. It's exactly what you're looking for. To explain a
bit:
>
> getDisplayValue(...) - returns the value you want the user to see.
> "Small",
> "Medium", etc. This is where you'd return SIZE.getName().
> getIdValue(...) returns the value submitted to the application. This is
> where you'd return SIZE.getId().
>
>
--
View this message in context:
http://www.nabble.com/DropDownChoice-binding-question-tf2900580.html#a8104039
Sent from the Wicket - User mailing list archive at Nabble.com.
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