Select widget not showing null selection item

Vaadin 6 / 7 / 8 Framework UI
1

Hi,
I’m noticing this behavior for the Select widget. If I use the default Select, I don’t see the null selection item id that I specify, but if I switch the select to be the NativeSelect, I can see it for the same code… Is this by design? If yes, could you tell how to show the null selection item value I specify for the Select component?

— code —


Select opts = new Select("Select caption");
//        AbstractSelect opts = new NativeSelect("Select caption");    //The null selection item shows up for this!
        opts.addItem("Test 1");
        opts.addItem("Test 2");
        String nullItem = "-- Select one --";
        opts.setNullSelectionItemId(nullItem);

        opts.setValue(nullItem);

        opts.setImmediate(true);

        opts.addListener(new Property.ValueChangeListener() {
            public void valueChange(Property.ValueChangeEvent event) {
                getMainWindow().showNotification("Selected item: " + event.getProperty());
            }
        });

btw, is there a way to attach screenshots to forum messages without uploading it elsewhere and directly embedding in the post via an attachment?

2

Hello,

seems that you don’t add the nullItem to your Select. So, you should add the following line to your code:

opts.addItem(nullItem);

Unfortunately adding any attachments isn’t currently allowed for users without administration privileges. I’ll see what I can do about it.

3

Thanks, Teemu. That works! I don’t know how i missed that. I guess since it worked with the native select without adding the null item, I assumed I was doing it right… Anyway, thanks again! :slight_smile: