validatable

gistfile1.txt

validator: { v -> 
                               try{
                                    v = parseInt(v)
                                } catch (NumberFormatException e) {
                                    field.background = Color.RED
                                    field.revalidate()
                                    return false
                                }
                                if (v >= 0 && v < MAX_VALUE) {
                                    field.background = Color.WHITE
                                    field.revalidate()
                                    return true
                                } else {
                                    field.background = Color.RED
                                    field.revalidate()
                                    return false
                                }
}