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from textual.app import App, ComposeResult
from textual.containers import Center, Middle
from textual.timer import Timer
from textual.widgets import Footer, ProgressBar
class StyledProgressBar(App[None]):
BINDINGS = [("s", "start", "Start")]
CSS_PATH = "progress_bar_styled.tcss"
progress_timer: Timer
"""Timer to simulate progress happening."""
def compose(self) -> ComposeResult:
with Center():
with Middle():
yield ProgressBar()
yield Footer()
def on_mount(self) -> None:
"""Set up a timer to simulate progress happening."""
self.progress_timer = self.set_interval(1 / 10, self.make_progress, pause=True)
def make_progress(self) -> None:
"""Called automatically to advance the progress bar."""
self.query_one(ProgressBar).advance(1)
def action_start(self) -> None:
"""Start the progress tracking."""
self.query_one(ProgressBar).update(total=100)
self.progress_timer.resume()
if __name__ == "__main__":
StyledProgressBar().run()
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