Hi Kjetil
Hmm I've only used the "simple" approach of simply having a js that
showed a div over the whole page when making callbacks. EG showing a
message saying loading and a gif. So you could create a behavior that
did that and attach it to the dropdown.
The thing is if you want something that gives an actual percentage you
will need to be able to provide that somehow and use the workerthread
approach.
regards Nino
Kjetil Paulsen wrote:
Hi
Is there an easy way to show the user that things are loading in the
background when using ajax calls to populate e.g the palette component
based on a selection in a dropdown? Like changing the mousepointer or
have some kind of load indicator component indicating this to the user
based on when the ajax call starts and ends..
I've attached some code - the call to fill the palette based on the
selection in the dropdown takes some time so there I would like to hook
in and to some kind of indication to the user that data are loading...
Code..
IModel companies = new AbstractReadOnlyModel() {
public Object getObject() {
return service.findAllCompanies();
}
protected Object load() {
return null;
}
};
IModel personsOnCompany = new AbstractReadOnlyModel() {
public Object getObject() {
List<Person> list = new ArrayList<Person>();
if (myModel.getCompany() != null) {
list =
service.findAllPersonsForCompany(myModel.getCompany());
}
return list;
}
protected Object load() {
return null;
}
};
IModel allPersons = new AbstractReadOnlyModel() {
public Object getObject() {
return service.findAllPersons();
}
protected Object load() {
return null;
}
};
final DropDownChoice companiesDDC =
new CompaniesDropDownChoice(
"companies",
new PropertyModel(MyPage.this,
"myModel.company"),
companies);
final Palette personPalette = new Palette("personPalette",
personsOnCompany,
allPersons,
new PersonRenderer(), 20, false);
add(companiesDDC);
personPalette.setOutputMarkupId(true);
add(personPalette);
companiesDDC.add(new
AjaxFormComponentUpdatingBehavior("onchange") {
protected void onUpdate(AjaxRequestTarget target) {
target.addComponent(personPalette);
}
});
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