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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