Python prompt_toolkit.application.Application() Examples

def listen_on_socket(self, socket_name=None):
        """
        Listen for clients on a Unix socket.
        Returns the socket name.
        """
        def connection_cb(pipe_connection):
            # We have to create a new `context`, because this will be the scope for
            # a new prompt_toolkit.Application to become active.
            with context():
                connection = ServerConnection(self, pipe_connection)

            self.connections.append(connection)

        self.socket_name = bind_and_listen_on_socket(socket_name, connection_cb)

        # Set session_name according to socket name.
#        if '.' in self.socket_name:
#            self.session_name = self.socket_name.rpartition('.')[-1]

        logger.info('Listening on %r.' % self.socket_name)
        return self.socket_name 

def message_dialog(
    title: AnyFormattedText = "",
    text: AnyFormattedText = "",
    ok_text: str = "Ok",
    style: Optional[BaseStyle] = None,
) -> Application[None]:
    """
    Display a simple message box and wait until the user presses enter.
    """
    dialog = Dialog(
        title=title,
        body=Label(text=text, dont_extend_height=True),
        buttons=[Button(text=ok_text, handler=_return_none),],
        with_background=True,
    )

    return _create_app(dialog, style) 

def print_container(container: "Container", file: Optional[TextIO] = None) -> None:
    """
    Print any layout to the output in a non-interactive way.

    Example usage::

        from prompt_toolkit.widgets import Frame, TextArea
        print_container(
            Frame(TextArea(text='Hello world!')))
    """
    if file:
        output = create_output(stdout=file)
    else:
        output = get_app_session().output

    def exit_immediately() -> None:
        # Use `call_from_executor` to exit "soon", so that we still render one
        # initial time, before exiting the application.
        get_event_loop().call_soon(lambda: app.exit())

    app: Application[None] = Application(
        layout=Layout(container=container), output=output, input=DummyInput()
    )
    app.run(pre_run=exit_immediately) 

def _(event):
    " Disable/enable wrapping. "
    global wrap_lines
    wrap_lines = not wrap_lines


# The `Application` 

def _create_application(self):
        """
        Create CommandLineInterface instance.
        """
        # Create Application.
        application = Application(
            input=self.input,
            output=self.output,
            editing_mode=EditingMode.VI,
            layout=self.editor_layout.layout,
            key_bindings=self.key_bindings,
#            get_title=lambda: get_terminal_title(self),
            style=DynamicStyle(lambda: self.current_style),
            paste_mode=Condition(lambda: self.paste_mode),
#            ignore_case=Condition(lambda: self.ignore_case),  # TODO
            include_default_pygments_style=False,
            mouse_support=Condition(lambda: self.enable_mouse_support),
            full_screen=True,
            enable_page_navigation_bindings=True)

        # Handle command line previews.
        # (e.g. when typing ':colorscheme blue', it should already show the
        # preview before pressing enter.)
        def preview(_):
            if self.application.layout.has_focus(self.command_buffer):
                self.previewer.preview(self.command_buffer.text)
        self.command_buffer.on_text_changed += preview

        return application 

def set_dummy_app():
    """
    Return a context manager that makes sure that this dummy application is
    active. This is important, because we need an `Application` with
    `is_done=False` flag, otherwise no keys will be processed.
    """
    app = Application(
        layout=Layout(Window()), output=DummyOutput(), input=create_pipe_input()
    )
    return set_app(app) 

def checkboxlist_dialog(
    title: AnyFormattedText = "",
    text: AnyFormattedText = "",
    ok_text: str = "Ok",
    cancel_text: str = "Cancel",
    values: Optional[List[Tuple[_T, AnyFormattedText]]] = None,
    style: Optional[BaseStyle] = None,
) -> Application[List[_T]]:
    """
    Display a simple list of element the user can choose multiple values amongst.

    Several elements can be selected at a time using Arrow keys and Enter.
    The focus can be moved between the list and the Ok/Cancel button with tab.
    """
    if values is None:
        values = []

    def ok_handler() -> None:
        get_app().exit(result=cb_list.current_values)

    cb_list = CheckboxList(values)

    dialog = Dialog(
        title=title,
        body=HSplit([Label(text=text, dont_extend_height=True), cb_list,], padding=1),
        buttons=[
            Button(text=ok_text, handler=ok_handler),
            Button(text=cancel_text, handler=_return_none),
        ],
        with_background=True,
    )

    return _create_app(dialog, style) 

def radiolist_dialog(
    title: AnyFormattedText = "",
    text: AnyFormattedText = "",
    ok_text: str = "Ok",
    cancel_text: str = "Cancel",
    values: Optional[List[Tuple[_T, AnyFormattedText]]] = None,
    style: Optional[BaseStyle] = None,
) -> Application[_T]:
    """
    Display a simple list of element the user can choose amongst.

    Only one element can be selected at a time using Arrow keys and Enter.
    The focus can be moved between the list and the Ok/Cancel button with tab.
    """
    if values is None:
        values = []

    def ok_handler() -> None:
        get_app().exit(result=radio_list.current_value)

    radio_list = RadioList(values)

    dialog = Dialog(
        title=title,
        body=HSplit(
            [Label(text=text, dont_extend_height=True), radio_list,], padding=1
        ),
        buttons=[
            Button(text=ok_text, handler=ok_handler),
            Button(text=cancel_text, handler=_return_none),
        ],
        with_background=True,
    )

    return _create_app(dialog, style) 

def input_dialog(
    title: AnyFormattedText = "",
    text: AnyFormattedText = "",
    ok_text: str = "OK",
    cancel_text: str = "Cancel",
    completer: Optional[Completer] = None,
    password: FilterOrBool = False,
    style: Optional[BaseStyle] = None,
) -> Application[str]:
    """
    Display a text input box.
    Return the given text, or None when cancelled.
    """

    def accept(buf: Buffer) -> bool:
        get_app().layout.focus(ok_button)
        return True  # Keep text.

    def ok_handler() -> None:
        get_app().exit(result=textfield.text)

    ok_button = Button(text=ok_text, handler=ok_handler)
    cancel_button = Button(text=cancel_text, handler=_return_none)

    textfield = TextArea(
        multiline=False, password=password, completer=completer, accept_handler=accept
    )

    dialog = Dialog(
        title=title,
        body=HSplit(
            [Label(text=text, dont_extend_height=True), textfield,],
            padding=D(preferred=1, max=1),
        ),
        buttons=[ok_button, cancel_button],
        with_background=True,
    )

    return _create_app(dialog, style) 

def yes_no_dialog(
    title: AnyFormattedText = "",
    text: AnyFormattedText = "",
    yes_text: str = "Yes",
    no_text: str = "No",
    style: Optional[BaseStyle] = None,
) -> Application[bool]:
    """
    Display a Yes/No dialog.
    Return a boolean.
    """

    def yes_handler() -> None:
        get_app().exit(result=True)

    def no_handler() -> None:
        get_app().exit(result=False)

    dialog = Dialog(
        title=title,
        body=Label(text=text, dont_extend_height=True),
        buttons=[
            Button(text=yes_text, handler=yes_handler),
            Button(text=no_text, handler=no_handler),
        ],
        with_background=True,
    )

    return _create_app(dialog, style) 

def cli(self) -> "Application":
        " For backward-compatibility. "
        return self.app 

def app(self) -> "Application[Any]":
        """
        The current `Application` object.
        """
        return self._app 

def _(event):
    event.app.layout.focus_previous()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _(event):
    " Quit application. "
    event.app.exit()


# 3. The `Application` 

def _create_application(
        self, input: Optional[Input], output: Optional[Output]
    ) -> Application:
        """
        Create an `Application` instance.
        """
        return Application(
            layout=self.ptpython_layout.layout,
            key_bindings=merge_key_bindings(
                [
                    load_python_bindings(self),
                    load_auto_suggest_bindings(),
                    load_sidebar_bindings(self),
                    load_confirm_exit_bindings(self),
                    ConditionalKeyBindings(
                        load_open_in_editor_bindings(),
                        Condition(lambda: self.enable_open_in_editor),
                    ),
                    # Extra key bindings should not be active when the sidebar is visible.
                    ConditionalKeyBindings(
                        self.extra_key_bindings,
                        Condition(lambda: not self.show_sidebar),
                    ),
                ]
            ),
            color_depth=lambda: self.color_depth,
            paste_mode=Condition(lambda: self.paste_mode),
            mouse_support=Condition(lambda: self.enable_mouse_support),
            style=DynamicStyle(lambda: self._current_style),
            style_transformation=self.style_transformation,
            include_default_pygments_style=False,
            reverse_vi_search_direction=True,
            input=input,
            output=output,
        ) 

def __init__(self, python_input, original_document):
        """
        Create an `Application` for the history screen.
        This has to be run as a sub application of `python_input`.

        When this application runs and returns, it retuns the selected lines.
        """
        self.python_input = python_input

        history_mapping = HistoryMapping(self, python_input.history, original_document)
        self.history_mapping = history_mapping

        document = Document(history_mapping.concatenated_history)
        document = Document(
            document.text,
            cursor_position=document.cursor_position
            + document.get_start_of_line_position(),
        )

        self.history_buffer = Buffer(
            document=document,
            on_cursor_position_changed=self._history_buffer_pos_changed,
            accept_handler=(
                lambda buff: get_app().exit(result=self.default_buffer.text)
            ),
            read_only=True,
        )

        self.default_buffer = Buffer(
            name=DEFAULT_BUFFER,
            document=history_mapping.get_new_document(),
            on_cursor_position_changed=self._default_buffer_pos_changed,
            read_only=True,
        )

        self.help_buffer = Buffer(document=Document(HELP_TEXT, 0), read_only=True)

        self.history_layout = HistoryLayout(self)

        self.app = Application(
            layout=self.history_layout.layout,
            full_screen=True,
            style=python_input._current_style,
            mouse_support=Condition(lambda: python_input.enable_mouse_support),
            key_bindings=create_key_bindings(self, python_input, history_mapping),
        ) 

def progress_dialog(
    title: AnyFormattedText = "",
    text: AnyFormattedText = "",
    run_callback: Callable[[Callable[[int], None], Callable[[str], None]], None] = (
        lambda *a: None
    ),
    style: Optional[BaseStyle] = None,
) -> Application[None]:
    """
    :param run_callback: A function that receives as input a `set_percentage`
        function and it does the work.
    """
    loop = get_event_loop()
    progressbar = ProgressBar()
    text_area = TextArea(
        focusable=False,
        # Prefer this text area as big as possible, to avoid having a window
        # that keeps resizing when we add text to it.
        height=D(preferred=10 ** 10),
    )

    dialog = Dialog(
        body=HSplit(
            [Box(Label(text=text)), Box(text_area, padding=D.exact(1)), progressbar,]
        ),
        title=title,
        with_background=True,
    )
    app = _create_app(dialog, style)

    def set_percentage(value: int) -> None:
        progressbar.percentage = int(value)
        app.invalidate()

    def log_text(text: str) -> None:
        loop.call_soon_threadsafe(text_area.buffer.insert_text, text)
        app.invalidate()

    # Run the callback in the executor. When done, set a return value for the
    # UI, so that it quits.
    def start() -> None:
        try:
            run_callback(set_percentage, log_text)
        finally:
            app.exit()

    def pre_run() -> None:
        run_in_executor_with_context(start)

    app.pre_run_callables.append(pre_run)

    return app