input_dialog validation

Validation does not work with input_dialog.

how to reproduce the issue

from prompt_toolkit.validation import Validator
from prompt_toolkit.shortcuts import input_dialog
from prompt_toolkit.validation import Validator


def is_number(text):
    return text.isdigit()

validator = Validator.from_callable(
    is_number,
    error_message='This input contains non-numeric characters')

age = input_dialog(title="Age", text="Your age:",
                   validator=validator).run()

print(f"Your age: {age}")

Fill the input dialog with some string (eg: abc) and press tab key to move focus on OK button. Then press enter key.

Output

Your age: abc

Output expected

Error message on focus lost

About the environment

$ python -V
Python 3.11.1

$ pip freeze
prompt-toolkit==3.0.36
wcwidth==0.2.6

Start at the input_dialog entry point and reproduce the supplied Python example with an invalid value, then trace how validation behaves when focus moves to the OK button. Done means the invalid value is rejected and the validation error is shown instead of returning abc.