ValidatedProperty

A Property whose value is validated before being set. Whenever value is changed, validation is called with the old and new values. validation returns a validated value.

validation takes 3 arguments (similar to ChangeListener :

1. this property

2. oldValue

3. newValue

For example, to reject a value, keeping the old value :

val myStringProperty = ValidatedProperty("Hello") { _, old, new ->
    if (old.isBlank()) old else new
}

Inheritors