app.py

import gradio as gr

def clear_message():
    return None

def undo_message():
    return None

def submit_input():
    return None

with gr.Blocks() as app:
    with gr.Row():
        chat_interface = gr.Chatbox()
        buttons = [
            gr.Button("Clear"),
            gr.Button("Undo"),
            gr.Button("Submit")
        ]

    chat_interface.change(clear_message, inputs=buttons[0], outputs=chat_interface)
    chat_interface.change(undo_message, inputs=buttons[1], outputs=chat_interface)
    chat_interface.change(submit_input, inputs=buttons[2], outputs=chat_interface)

app.launch()