How do I make a simple output&input application?

[raphant]

Hi,

What I have

I have a CLI app that currently displays a bunch of information on the terminal.

Example

What I desire

What I desire is to be able to see all of the above output but also have a permanent input section where I can enter commands and change certain settings like so:

Example

What I have tried

I've looked at examples and from what I could gather, this would involve a horizontal split and perhaps two buffers: one for input, one for output. I would also want it to be fullscreen so the Application(full_screen=true) would be used.
It looks like I would also need to route my logging system to the output buffer which I know how to do.

I'm just having difficulty piecing everything together in code and would like some general/specific pointers or even (preferably ) pseudo-code!

Thanks

[raphant]

Ok I figured it out:

from prompt_toolkit import Application
from prompt_toolkit.buffer import Buffer
from prompt_toolkit.completion import WordCompleter
from prompt_toolkit.key_binding import KeyBindings
from prompt_toolkit.layout import (
    Window,
    BufferControl,
    Layout,
    HSplit,
)

from fenparser import state, communication

kb = KeyBindings()


@kb.add('c-q')
def exit_(event):
    """
    Pressing Ctrl-Q will exit the user interface.

    Setting a return value means: quit the event loop that drives the user
    interface and return this value from the `Application.run()` call.
    """
    state.go = False
    event.app.exit()


def on_text_input(buffer: Buffer):
    """Handles input and clears the buffer after message is received"""
    message = buffer.text
    display_buffer.insert_text(message + '\n')
    try:
        type_, value = message.split(' ', 1)
    except Exception as e:
        display_buffer.insert_text(str(e) + '\n')
        return
    # queues.state_queue.put(split)
    communication.send_message(type_, value)
    buffer.reset()
    return True


# doesn't work as of yet
command_completer = WordCompleter(
    ['move', 'reset', 'set_node_limit', 'orientation', 'node_limit', 'hint', 'fen']
)


input_buffer = Buffer(
    multiline=False,
    enable_history_search=True,
    accept_handler=on_text_input,
    completer=command_completer,
    complete_while_typing=True,
)
# I set my logger to send all output to this
display_buffer = Buffer()

root_container = HSplit(
    [
        # Top window that displays all messages
        # `focusable=False` ensures that it won't receive input
        Window(
            content=BufferControl(buffer=display_buffer, focusable=False),
            allow_scroll_beyond_bottom=True,
            wrap_lines=True,
        ),
        # Bottom window that accepts input
        Window(content=BufferControl(buffer=input_buffer)),
    ]
)

layout = Layout(root_container)

app = Application(layout=layout, full_screen=True, key_bindings=kb)