__init__.py

class PasswordInput(WidgetWrap):

    """ Password input dialog
    """
    __metaclass__ = signals.MetaSignals
    signals = ['done']

    def __init__(self, title, done_signal_handler):
        self.title = '{0} (Esc)'.format(title)
        self.pass_input = Edit(caption=('', 'Password: '), mask='*')
        self.pass_confirm_input = Edit(
            caption=('', 'Confirm Password: '), mask='*')
        w = self._build_widget()
        w = AttrWrap(w, 'dialog')

        connect_signal(self, 'done', done_signal_handler)
        super().__init__(w)

    def _buttons(self):
        buttons = [AttrWrap(Button("Ok", self.submit),
                            'button'),
                   AttrWrap(Button("Cancel", self.cancel),
                            'button')]
        return Columns(buttons)

    def _build_widget(self, **kwargs):
        lbox = ListBox([
            AttrWrap(self.pass_input, 'input', 'input focus'),
            AttrWrap(self.pass_confirm_input, 'input', 'input focus'),
            Divider(),
            self._buttons()
        ])
        lbox.set_focus(0)
        w = LineBox(
            BoxAdapter(lbox, height=4), title='Enter new Password (ESC)')
        return w

    def keypress(self, size, key):
        if key == 'enter':
            self.submit()
            return
        elif key == 'esc':
            self.cancel()
            return

    def submit(self, button):
        self.emit_done_signal(self.editor.get_edit_text())

    def cancel(self, button):
        self.emit_done_signal()

    def emit_done_signal(self, content=None):
        emit_signal(self, 'done', content)