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        self.text = Tkinter.Text(self.root, height=30, width=80)
        self.text.config(
            state=Tkinter.DISABLED # make textbox "read-only"
        )
        self.root.bind("<Key>", self.event_key_pressed)

    def event_key_pressed(self, event):
        char = event.char
        self.text.config(state=Tkinter.NORMAL)
        char = foobar(char)
        self.text.insert("end", char)
        self.text.see("end")
        self.text.config(state=Tkinter.DISABLED)

Code: Alles auswählen

        self.text = Tkinter.Text(self.root, height=30, width=80)
        self.root.bind("<Key>", self.event_key_pressed)

    def event_key_pressed(self, event):
        keycode = event.keycode
        char = event.char
        log.critical("keycode %s - char %s", keycode, repr(char))
        if not char or char not in string.letters:
            log.critical("ignore")
            return

        converted_char = invert_shift(char)
        log.critical("Convet char %r to %r", char, converted_char)
        self.text.insert(Tkinter.CURRENT, converted_char)
        return "break"

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def invert_shift(chars):
    """
    >>> invert_shift("a")
    'A'
    >>> invert_shift("A")
    'a'

    >>> invert_shift("123 foo 456 BAR #!")
    '123 FOO 456 bar #!'
    """
    result = ""
    for char in chars:
        if char in string.ascii_lowercase:
#             log.critical("auto shift lowercase char %s to UPPERCASE", repr(char))
            char = char.upper()
        elif char in string.ascii_uppercase:
#             log.critical("auto shift UPPERCASE char %s to lowercase", repr(char))
            char = char.lower()
        result += char
    return result

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...

    self.root.bind("<Key>", self.event_key)

    ...

    converted_char = char.upper()
    self.text.delete("insert-1c") # Delete last input char
    self.text.insert(Tkinter.INSERT, converted_char) # Insert converted char
    return "break"