textual_stopwatch_app_with_widgets_and_dark_mode.py

1from textual.app import App, ComposeResult
2from textual.widgets import Header, Footer, Static, Button
3
4class TimeDisplay(Static):
5    """A widget to display elapsed time."""
6
7class Stopwatch(Static):
8    """A stopwatch widget."""
9    def compose(self) -> ComposeResult:
10        yield Button("Start", id="start", variant="success")
11        yield Button("Stop", id="stop", variant="error")
12        yield Button("Reset", id="reset")
13        yield TimeDisplay("00:00:00.00")
14
15class StopwatchApp(App):
16    """A Textual app to manage stopwatches."""
17
18    BINDINGS = [("d", "toggle_dark", "Toggle dark mode")]
19
20    def compose(self) -> ComposeResult:
21        yield Header()
22        yield Footer()
23        yield Stopwatch()
24        yield Stopwatch()
25        yield Stopwatch()
26
27    def action_toggle_dark(self) -> None:
28        """An action to toggle dark mode."""
29        self.dark = not self.dark
30
31if __name__ == "__main__":
32    app = StopwatchApp()
33    app.run()