How to display Date and Number Fields with NULL values as invalid?

[andreiastra]

Hi,

I have TextFields that should not be empty. I use

field.setAllowBlank(false);

to achieve that.

When the fields are initialized they do not have any value assigned to them; their values are Nulls. But, these fields are not displayed as invalid (with the red border).

Invalid Field.JPG

I do need to show them as invalid.

I do not have that problem with TextField<String>, because I can always call

stringField.setValue("");

Now, the field is not null but blank and is properly invalidated. Unfortunately, there are no blank Date or Number values.

Is there any trick/ workaround to display DateField and Number field with Null values as invalid?

Thank you,

Andrei

[sven]

Is there any trick/ workaround to display DateField and Number field with Null values as invalid?

Set allowblank to false. Add a render event listener to the field and call setValue(null);

[andreiastra]

Thank you, Sven! It worked.