Cascade ComboBox update using FormFieldFactory

Vaadin 6 / 7 / 8 Framework UI
1

Hello,

It is possible to update a ComboBox depending on another ComboBoxt
using FormFieldFactory
?, for example this relation: ComboBox cb1 show countries and ComboBox cb2 show cities, when you change country in cb1, cb2 must show the cities of that country, some sample code?

Thanks

2

No sample code.

But here is what you can do!

What you can do is to add a listener to the combobox which would update the second one.

say

psuedocode :
when value changes on the cb1
get the value
set it to the value in cb2

Can’t be simpler.

3

is solved

ComboBox provincia ------------> (1…* ) in ComboBox canton

sample:

    List<UtilGlosasPaisDiv1> lProvincia = utilGlosasPaisDiv1Facade.findAll();
    for (Iterator<UtilGlosasPaisDiv1> it = lProvincia.iterator(); it.hasNext();) {
        UtilGlosasPaisDiv1 o = it.next();
        provincia.addItem(o);
    }
    provincia.setImmediate(true);
    provincia.addListener(new ValueChangeListener() {

        @Override
        public void valueChange(ValueChangeEvent event) {
            UtilGlosasPaisDiv1 ps = (UtilGlosasPaisDiv1) provincia.getValue();
            List<UtilGlosasPaisDiv2> cs = new ArrayList<UtilGlosasPaisDiv2>(ps.getUtilGlosasPaisDiv2Collection());
        
            canton.removeAllItems();

//load new items
for (Iterator it = cs.iterator(); it.hasNext():wink: {
UtilGlosasPaisDiv2 utilGlosasPaisDiv2 = it.next();
canton.addItem(utilGlosasPaisDiv2);
}

        }
    });