Wicket newbie so standard up front apologies. We are running our intranet on
Wicket 1.4.18. I have searched the forums but I mostly see requests to
generate stateless pages. I need to do the opposite. I need to generate a
stateful page off an AutoCompleteTextField onchange/onsubmit event.
Setup: I have an AutoCompleteTextField as the only component inside a form,
no buttons or submit links. The AutoComplete field holds a list of strings
of people's names and email addresses. Beneath the form in the html markup
is a WebMarkupContainer which holds a ListView. The ListView is fed by a
simple property model of Person objects which is empty on initial rendering.
When a person is selected in the AutoComplete field then the ListView is
updated to display one row with person-dependent links to other pages. I
know the ListView is over kill for displaying only one row but the code was
brought forward from a previous app so why re-invent the wheel.
What is working: When a user types in chars and eventually selects a name
from the AutoComplete they hit Enter and the name populates the field. I
have an AjaxFormSubmitBehavior on the AutoComplete field where I trap the
onSubmit, manipulate the selected user string and populate the simple
property model with a Person object from our system. I then trigger a
target.addComponent on the WebMarkupContainer to force the ListView to be
rendered with the new Person object from the model and life is all good. I
get the display results I am looking for...except
The Problem: When the page is first rendered it is stateless (url just shows
wicket:bookmarkablePage=:com.ourstuff.PersonSelectionPage). Even after the
user types in chars to do the AutoComplete process, hits Enter to select the
name from the AutoComplete listing, and the ajax process updates the
ListView display with the resulting links for that person the page is still
stateless. At that point If the user selects a link from the ListView and
then tries to return to the page with a browser Back button they are
returned to a blank AutoComplete field with no ListView data (since there is
no stateful page to return to.) I do see that both the Form and
AutoCompleteTextField component's onSubmit events are called when the user
hits enter to select the name from the listing.
What I don't understand: After selecting a person from the AutoComplete
listing if I place the cursor in the AutoComplete field again and hit Enter,
then the Form's onSubmit event is called again but this time the page is
returned to the server, gets versioned with a wicket:interface=:2:1:::, and
I am able to click the ListView links and return to the person populated
page with the Back button. Not sure why the Form's onSubmit event behaves
differently unless the AutoComplete's onSubmit is overridding it?
The Question: So, how can I force a page to get 'versioned' on an
AutoCompleteTextField onchange/onsubmit event without asking the user to
click an additional button or link?
I have attached the code for the relevant objects
Form<Void> form = new Form<Void>("form") {
@Override
public void onSubmit() {
System.out.println("form submit");
}
};
final AutoCompleteTextField<String> field = new
AutoCompleteTextField<String>("ac", new Model<String>("")) {
private static final long serialVersionUID = 1L;
@Override
protected Iterator<String> getChoices(String input) {
if (Strings.isEmpty(input)) {
List<String> emptyList =
Collections.emptyList();
return emptyList.iterator();
}
List<String> choices = new
ArrayList<String>(20);
for (final Persons person : customers) {
String fullname = person.getFullName()
+ " (" + person.getEmail() +
")";
if
(fullname.toLowerCase().contains(input.toLowerCase())) {
choices.add(fullname);
if (choices.size() == 15) {
break;
}
}
}
return choices.iterator();
}
};
form.add(field);
field.add(new AjaxFormSubmitBehavior(form, "onchange") {
private static final long serialVersionUID = 1L;
@Override
protected void onSubmit(AjaxRequestTarget target) {
// get the person record for the autocomplete user and update
the chart
System.out.println("ajax submit");
String fullfieldentry = field.getModelObject();
String email = parseEmailFromEntry(fullfieldentry);
if (!email.equals("")) {
SessionFactory factory =
siteDaoFactory.getSessionFactory();
HibernateUtility.openSession(factory);
try {
// set the model with the Person object
setLoneUser(personDao.findPersonsByEmailWithInit(email));
// wicket won't allow us to target the
PageableListView repeater
// so we need to target the wmc holding the
repeater.
target.addComponent(datacontainer);
} catch (Exception e) {
e.printStackTrace();
}finally {
HibernateUtility.close(factory);
}
}
}
@Override
protected void onError(AjaxRequestTarget target) {
}
});
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