Re: Empty ListChoice
I believe that doing this causes the list to contain one empty, but
still selectable, element. That is what I am trying to avoid--I just
want a plain empty list. I'm starting to wonder whether empty lists are
considered to not be the Wicket way, as it seems like it should be
easier than this. Does ListChoice *intentionally* not allow for an
empty list? I expected to find something like
allowEmpty(boolean)...but no dice.
I could see this being a technical issue since the whole Choose
One/empty item thing will cause a request parameter to be submitted
with a form, whereas an empty list would submit no parameter at
all...possibly making it difficult/impossible to determine when a null
must be applied to the model during form processing. Does that have
anything to do with it?
That aside...thanks very much for your response, Kent.
--Matt
Kent Tong wrote:
Matt Jensen-2 wrote:
Is there any way to get a ListChoice to render as empty (no options)
when its choice model is empty? By default, Choose One appears. If I
set nullValid to true, an empty item appears which is still selectable.
I would like to have the list come up completely empty if the choice
model is empty, and I'd like to do it without creating a new component
(though obviously I will do that if it is what is needed.)
Try:
ListChoice lc = new ListChoice(lc, ...) {
protected CharSequence getDefaultChoice(Object selected) {
return ;
}
};
-
--
Kent Tong
Wicket tutorials freely available at http://www.agileskills2.org/EWDW
Re: Empty ListChoice
Matt Jensen-2 wrote:
Is there any way to get a ListChoice to render as empty (no options)
when its choice model is empty? By default, Choose One appears. If I
set nullValid to true, an empty item appears which is still selectable.
I would like to have the list come up completely empty if the choice
model is empty, and I'd like to do it without creating a new component
(though obviously I will do that if it is what is needed.)
Try:
ListChoice lc = new ListChoice(lc, ...) {
protected CharSequence getDefaultChoice(Object selected) {
return ;
}
};
-
--
Kent Tong
Wicket tutorials freely available at http://www.agileskills2.org/EWDW
--
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Re: Empty ListChoice
Matt Jensen-2 wrote: I believe that doing this causes the list to contain one empty, but still selectable, element. That is what I am trying to avoid--I just want a plain empty list. I'm starting to wonder whether empty lists are considered to not be the Wicket way, as it seems like it should be easier than this. Does ListChoice *intentionally* not allow for an empty list? I expected to find something like allowEmpty(boolean)...but no dice. Have you tried my code? The list has no selectable entry. - -- Kent Tong Wicket tutorials freely available at http://www.agileskills2.org/EWDW -- View this message in context: http://www.nabble.com/Empty-ListChoice-tf4604759.html#a13186476 Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Empty ListChoice
Is there any way to get a ListChoice to render as empty (no options) when its choice model is empty? By default, Choose One appears. If I set nullValid to true, an empty item appears which is still selectable. I would like to have the list come up completely empty if the choice model is empty, and I'd like to do it without creating a new component (though obviously I will do that if it is what is needed.) --Matt - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Empty ListChoice
Try this:
List choices;
if(empty_condition){
choices = new ArrayList();
}
else{
choices =
}
DropDownChoice d = new DropDownChoice(drop, new
PropertyModel(this,drop), choices) {
protected void onComponentTagBody(final MarkupStream
markupStream, final ComponentTag openTag)
{
Object list =getChoices();
if(list instanceof List){
int size = ((List)list).size();
if(size 0){
super.onComponentTagBody
(markupStream,openTag);
}
else{
replaceComponentTagBody(markupStream, openTag,
new AppendingStringBuffer());
}
}
else{
super.onComponentTagBody(markupStream,openTag);
}
}
};
-swaroop
On 10/11/07, Matt Jensen [EMAIL PROTECTED] wrote:
Is there any way to get a ListChoice to render as empty (no options)
when its choice model is empty? By default, Choose One appears. If I
set nullValid to true, an empty item appears which is still selectable.
I would like to have the list come up completely empty if the choice
model is empty, and I'd like to do it without creating a new component
(though obviously I will do that if it is what is needed.)
--Matt
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