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45 lines
1.0 KiB
Python
45 lines
1.0 KiB
Python
import asyncio
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from random import randint
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from textual.app import App, ComposeResult
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from textual.color import Color
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from textual.containers import Grid, VerticalScroll
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from textual.widget import Widget
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from textual.widgets import Footer, Label
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class ColourChanger(Widget):
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def on_click(self) -> None:
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self.styles.background = Color(
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randint(1, 255),
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randint(1, 255),
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randint(1, 255),
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)
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class MyApp(App[None]):
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BINDINGS = [("l", "load", "Load data")]
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CSS = """
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Grid {
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grid-size: 2;
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}
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"""
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def compose(self) -> ComposeResult:
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yield Grid(
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ColourChanger(),
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VerticalScroll(id="log"),
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)
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yield Footer()
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def action_load(self) -> None:
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asyncio.create_task(self._do_long_operation())
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async def _do_long_operation(self) -> None:
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self.query_one("#log").mount(Label("Starting ⏳")) # (1)!
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await asyncio.sleep(5) # (2)!
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self.query_one("#log").mount(Label("Data loaded ✅")) # (3)!
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MyApp().run()
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