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from textual.app import App, ComposeResult
from textual.widgets import Button
class OnDecoratorApp(App):
CSS_PATH = "on_decorator.tcss"
def compose(self) -> ComposeResult:
"""Three buttons."""
yield Button("Bell", id="bell")
yield Button("Toggle dark", classes="toggle dark")
yield Button("Quit", id="quit")
def on_button_pressed(self, event: Button.Pressed) -> None: # (1)!
"""Handle all button pressed events."""
if event.button.id == "bell":
self.bell()
elif event.button.has_class("toggle", "dark"):
self.theme = (
"textual-dark" if self.theme == "textual-light" else "textual-light"
)
elif event.button.id == "quit":
self.exit()
if __name__ == "__main__":
app = OnDecoratorApp()
app.run()
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