TCP asyncio hello world

README.md

Look at this TCP hello world video

app.py

"""
My first application
"""
import asyncio
import toga
from toga.style import Pack
from toga.style.pack import COLUMN, ROW

from rubicon.java.android_events import AndroidEventLoop


class HelloWorld(toga.App):
    def startup(self):
        loop = AndroidEventLoop()
        asyncio.set_event_loop(loop)
        loop.run_forever_cooperatively()

        main_box = toga.Box(style=Pack(direction=COLUMN))

        name_label = toga.Label("Your name: ", style=Pack(padding=(0, 5)))
        self.name_input = toga.TextInput(style=Pack(flex=1))

        name_box = toga.Box(style=Pack(direction=ROW, padding=5))
        name_box.add(name_label)
        name_box.add(self.name_input)

        async def hello_world_async():
            name_label.text = "TCP conn..."
            print("hi, sleeping for 1...")
            await asyncio.sleep(1)
            print("ok, done sleeping")
            print("async hello from hello_world_async()")
            print("Gonna try tcp")
            reader, writer = await asyncio.open_connection("195.34.89.241", 7)
            print("Sending hi")
            writer.write(b"hi")
            await writer.drain()
            data = await reader.read(100)
            print(f"Received: {data.decode()!r}")
            name_label.text = data.decode()

            print("Close the connection")
            writer.close()
            await writer.wait_closed()

        asyncio.ensure_future(hello_world_async())

        button = toga.Button(
            "Say Hello!", on_press=self.say_hello, style=Pack(padding=5)
        )

        main_box.add(name_box)
        main_box.add(button)

        self.main_window = toga.MainWindow(title=self.formal_name)
        self.main_window.content = main_box
        self.main_window.show()

    async def say_hello(self, widget):
        print("Hello", self.name_input.value)


def main():
    return HelloWorld()