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Guard finally blocks against app teardown during Ctrl+C

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The sweep/scan finally blocks call self.app.call_from_thread() to
reset button state, but self.app raises NoActiveAppError if the
Textual context is already torn down during Ctrl+C shutdown.
Wrap with contextlib.suppress so the flag reset still happens.
This commit is contained in:
Ryan Malloy 2026-02-14 16:58:21 -07:00
parent c6ac958ee8
commit 972c26b22f
1 changed files with 9 additions and 6 deletions
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15
tui/src/birdcage_tui/screens/signal.py
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@ -447,15 +447,17 @@ class SignalScreen(Container):
"Firmware sweep failed, falling back to software",
exc_info=True,
)
self.app.call_from_thread(
self._set_sweep_status,
"Firmware sweep failed -- falling back...",
)
with contextlib.suppress(Exception):
self.app.call_from_thread(
self._set_sweep_status,
"Firmware sweep failed -- falling back...",
)
self._do_sweep_software(device)
finally:
self._sweeping = False
self.app.call_from_thread(self._reset_sweep_buttons)
with contextlib.suppress(Exception):
self.app.call_from_thread(self._reset_sweep_buttons)
def _do_sweep_firmware(self, device: DeviceLike) -> None:
"""Firmware-accelerated sweep via azscanwxp (runs in worker thread)."""
@ -674,7 +676,8 @@ class SignalScreen(Container):
self._do_scan_inner(device)
finally:
self._scanning = False
self.app.call_from_thread(self._reset_scan_buttons)
with contextlib.suppress(Exception):
self.app.call_from_thread(self._reset_scan_buttons)
def _do_scan_inner(self, device: DeviceLike) -> None:
"""Inner scan logic (called from _do_scan worker thread)."""