print feedback message to current text box via keyboard emulation #UI #keyboard #python

keyboard.py

class FeedbackManager:
    """
    Manage user feedback by printing a message and printing dots after it.

    This class takes care of printing a message and then appending dots to it
    until told to clear. It also handles clearing the feedback by deleting the
    message and dots.

    The printing of dots is done in a separate thread to avoid blocking.
    """

    def __init__(self):
        self.dot_thread = None
        self.message = None
        self.keyboard_controller = keyboard.Controller()

    def provide_feedback(self, message):
        """
        Print a message and then print dots after it until clear_feedback is called.

        This function is non-blocking and runs in a separate thread.

        Args:
            message (str): The message to print before the dots.
        """
        self.message = message
        self.keyboard_controller = keyboard.Controller()
        self.keyboard_controller.type(self.message)
        dot_lock = threading.Lock()

        self.dot_thread = threading.Thread(target=self._print_dots, args=(dot_lock,))
        self.dot_thread.daemon = True
        self.dot_thread.start()

    def _print_dots(self, lock, every=2):
        while getattr(self.dot_thread, "do_run", True):
            self.keyboard_controller.type(".")
            with lock:
                self.message += "."
            time.sleep(every)

    def clear_feedback(self):
        """
        Clear the feedback by deleting the message and dots.

        This function stops the thread printing dots and deletes the message
        from the console.
        """
        if self.dot_thread:
            self.dot_thread.do_run = False
            self.dot_thread.join()

            for _ in range(len(self.message)):
                self.keyboard_controller.tap(keyboard.Key.backspace)
                time.sleep(0.001)

        self.dot_thread = None
        self.message = None