Vaadin 8 + DataBinding

Hello. 

I was trying new Vaadin 8 data binding. 

I used BeanBinder and bind 2 TextFields with Validators (lenght > 3 && lenght >5), 
Then i added addStatusChangeListener with code from examples: 

boolean isValid = !event.hasValidationErrors();
boolean hasChanges = binder.hasChanges();

The problem is when you put first field in wrong state (lenght == 2), put second in wrong state (lenght == 4)
isValid = false (correct)

change second field to correct state (lenght 6), the first one is stil in incorrect state (lenght == 2)
isValid = true (incorrect). 

Is this bug (seem to be) or developers need to handle changes and error manually? 

Thanks for answer (if). 

Hi,

I'm not super-familiar with Vaadin 8 yet, but sounds like the event has the validity value of the most recent changed field. Can you check the validity of the Binder instead?

-Olli

Hello everybody. 

So i test the behaviour which i describe above.
Here are some results:

binder.addStatusChangeListener(event -> {
  boolean isValid = !event.hasValidationErrors();
  boolean hasChanges = binder.hasChanges();
});

event contains only errors from actual modified field, not from whole form. 

While user is typing something to field, it will trigger status change. 
- is there any way to use logic from V7 - after leaving the field, the value is binded. 
- it is annoing to get error messages while i'm writing and thinking about what to type. 

Questions:
is code above a bug or programmer need to find another way to get no valid state of binder
binder.validate().getFieldValidationErrors()

Is there any way to disable "on fly typing + validate" event? 
 

One big thanks for answer ;)