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from textual.app import App, ComposeResult
from textual.reactive import reactive
from textual.widget import Widget
from textual.widgets import Button, Label, ProgressBar
class Counter(Widget):
DEFAULT_CSS = "Counter { height: auto; }"
counter = reactive(0) # (1)!
def compose(self) -> ComposeResult:
yield Label()
yield Button("+10")
def on_button_pressed(self) -> None:
self.counter += 10
def watch_counter(self, counter_value: int):
self.query_one(Label).update(str(counter_value))
class WatchApp(App[None]):
def compose(self) -> ComposeResult:
yield Counter()
yield ProgressBar(total=100, show_eta=False)
def on_mount(self):
def update_progress(counter_value: int): # (2)!
self.query_one(ProgressBar).update(progress=counter_value)
self.watch(self.query_one(Counter), "counter", update_progress) # (3)!
if __name__ == "__main__":
WatchApp().run()
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