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from textual.app import App, ComposeResult
from textual.clock import MockClock
from textual.containers import Center, Middle
from textual.timer import Timer
from textual.widgets import Footer, ProgressBar
class IndeterminateProgressBar(App[None]):
BINDINGS = [("s", "start", "Start")]
progress_timer: Timer
"""Timer to simulate progress happening."""
def compose(self) -> ComposeResult:
self.clock = MockClock()
with Center():
with Middle():
yield ProgressBar(clock=self.clock)
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()
def key_f(self) -> None:
# Freeze time for the indeterminate progress bar.
self.clock.set_time(5)
self.refresh()
def key_t(self) -> None:
# Freeze time to show always the same ETA.
self.clock.set_time(0)
self.query_one(ProgressBar).update(total=100, progress=0)
self.clock.set_time(3.9)
self.query_one(ProgressBar).update(progress=39)
def key_u(self) -> None:
self.refresh()
self.query_one(ProgressBar).update(total=100, progress=100)
if __name__ == "__main__":
IndeterminateProgressBar().run()
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