support async callback with state

[FredLL-Avaiga]

resolves #2288

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

Support async callback
inspired by
@FlorianJacta proposal

Related Tickets & Documents

• Closes Simplify asynchronous/long running callbacks #2288

How to reproduce the issue

import asyncio

import taipy.gui.builder as tgb
from taipy.gui import Gui, State


async def heavy_function(state: State):
    state.logs = "Starting...\n"
    state.logs += "Searching documents\n"
    await asyncio.sleep(5)
    state.logs += "Responding to user\n"
    await asyncio.sleep(5)
    state.logs += "Fact Checking\n"
    await asyncio.sleep(5)
    state.result = "Done!"


if __name__ == "__main__":
    logs = ""
    result = "No response yet"

    with tgb.Page() as main_page:
        tgb.button("Respond", on_action=heavy_function)
        with tgb.part("card"):
            tgb.text("{logs}", mode="pre")

        tgb.text("# Result", mode="md")
        tgb.text("{result}")

    gui = Gui(main_page)
    gui.run(title="2288 aync callback")

[FabienLelaquais]

😮amazingly neat!!
We need a code example for this one.
An async function that would do something relevant (like searching whether a large number is prime or not) to demonstrate the feature.
Great, great job!

ADDITION: I just spotted the code example you provide.
I'm not sure we can keep it as is, but maybe it's just what we want.
Then it should go to taipy/doc/gui/examples. async_callback.py?

[FredLL-Avaiga]

Would be nice to have a neat example...

[dinhlongviolin1]

Very very nice!

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
19424	16903	87%	0%	🟢

New Files

File	Coverage	Status
taipy/gui/utils/threads.py	63%	🟢
TOTAL	63%	🟢

Modified Files

File	Coverage	Status
taipy/gui/gui.py	80%	🟢
taipy/gui/gui_actions.py	66%	🟢
taipy/gui/state.py	84%	🟢
TOTAL	77%	🟢

updated for commit: df3edde by action🐍

[FabienLelaquais]

👌👌👌