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272 | class TrayController(QObject):
"""Owns the manager and keeps the menu in step with it.
The menu is built once and only its actions change: rebuilding a QMenu that is
open misbehaves on macOS and on the Linux D-Bus menu. Everything here runs on
the GUI thread; the manager has its own threads, and bleak never runs here.
"""
def __init__(
self,
app: QApplication,
manager: ManagerLike,
autostart: Autostart,
version: str,
quit_timeout_seconds: float = QUIT_TIMEOUT_SECONDS,
) -> None:
super().__init__(app)
self._app = app
self._manager = manager
self._autostart = autostart
self._version = version
self._quit_timeout = quit_timeout_seconds
self._live: queue.Queue[NaneosDeviceDataPoint] = queue.Queue(maxsize=2000)
self._seen = LastSeen()
self._stopping = False
self._gave_up = False # Quit waited for the manager and it did not stop in time
self._final_stop_done = False
self._quit_deadline = 0.0
self._started_at = time.monotonic()
self._warned_no_tray = False
self._death_logged = False
self._tray = QSystemTrayIcon(QIcon(str(icon_file("png"))), self)
self._menu = QMenu() # owned by us: a tray icon does not take ownership
self._build_menu()
self._tray.setContextMenu(self._menu)
self._poll_timer = QTimer(self)
self._poll_timer.timeout.connect(self.refresh)
self._quit_timer = QTimer(self)
self._quit_timer.timeout.connect(self._check_stopped)
# Python only runs its signal handlers (SIGTERM, Ctrl+C) when bytecode runs,
# which a Qt event loop alone does not give it.
self._signal_timer = QTimer(self)
self._signal_timer.timeout.connect(lambda: None)
app.aboutToQuit.connect(self._on_about_to_quit)
app.commitDataRequest.connect(lambda *_: self._on_about_to_quit())
# ------------------------------------------------------------ menu
def _build_menu(self) -> None:
menu = self._menu
self._title_action = menu.addAction(format_title(self._version))
self._title_action.setEnabled(False)
self._status_action = menu.addAction("")
self._status_action.setEnabled(False)
menu.addSeparator()
self._rows: list[QAction] = []
for _ in range(MAX_ROWS):
row = menu.addAction("")
row.setEnabled(False) # information only; later a submenu with commands
row.setVisible(False)
self._rows.append(row)
menu.addSeparator()
self._autostart_action = menu.addAction("Start at login")
self._autostart_action.setCheckable(True)
self._autostart_action.triggered.connect(self._set_autostart)
self._log_action = menu.addAction("Open log folder")
self._log_action.triggered.connect(self._open_log_folder)
self._quit_action = menu.addAction("Quit")
self._quit_action.triggered.connect(self.request_quit)
menu.aboutToShow.connect(self._on_menu_about_to_show)
def _on_menu_about_to_show(self) -> None:
self._autostart_action.setChecked(self._safe_autostart_enabled())
self.refresh()
def _safe_autostart_enabled(self) -> bool:
try:
return self._autostart.enabled()
except Exception as e:
logger.warning(f"Cannot read the autostart setting: {e}")
return False
def _set_autostart(self, checked: bool) -> None:
try:
self._autostart.enable() if checked else self._autostart.disable()
except Exception as e:
logger.error(f"Cannot change the autostart setting: {e}")
self._tray.showMessage("Naneos Devices", f"Could not change the setting: {e}")
self._autostart_action.setChecked(self._safe_autostart_enabled())
def _open_log_folder(self) -> None:
folder = log_dir()
folder.mkdir(parents=True, exist_ok=True)
QDesktopServices.openUrl(QUrl.fromLocalFile(str(folder)))
# ------------------------------------------------------------ life cycle
def start(self) -> None:
self._manager.register_live_queue(self._live)
self._manager.start()
self._tray.show()
self.refresh()
self._poll_timer.start(POLL_MS)
self._signal_timer.start(500)
def refresh(self) -> None:
"""Bring the menu up to date. Runs every second and when the menu opens."""
self._seen.drain(self._live)
if self._stopping:
return
self._show_tray_when_available()
devices = sort_devices(self._manager.get_devices())
self._seen.forget_except(d.serial_number for d in devices)
if not self._manager.is_alive():
status = "Stopped – see log"
if not self._death_logged:
self._death_logged = True
logger.error("The device manager stopped unexpectedly")
else:
status = format_status(
self._manager.upload_active,
self._manager.pending_upload_count,
self._manager.diagnostics_in_progress,
)
self._status_action.setText(status)
texts = [format_device_row(d, self._seen.age(d.serial_number)) for d in devices]
if not texts:
texts = ["No devices in reach"]
if len(texts) > MAX_ROWS:
texts = texts[: MAX_ROWS - 1] + [f"… and {len(texts) - MAX_ROWS + 1} more"]
for i, row in enumerate(self._rows):
row.setVisible(i < len(texts))
if i < len(texts):
row.setText(texts[i])
self._tray.setToolTip(format_tooltip(self._version, len(devices)))
def _show_tray_when_available(self) -> None:
"""A Linux desktop may start its tray after us; show the icon as soon as it exists."""
if self._tray.isVisible():
return
if QSystemTrayIcon.isSystemTrayAvailable():
self._tray.show()
elif (
not self._warned_no_tray
and time.monotonic() - self._started_at > TRAY_WARNING_AFTER_SECONDS
):
self._warned_no_tray = True
logger.warning(
"No system tray on this desktop. Devices are still read and uploaded. "
"On GNOME install the 'AppIndicator and KStatusNotifierItem Support' extension."
)
def handle_command(self, command: str) -> None:
"""A command from another process, see instance.py."""
if command == "quit":
self.request_quit()
elif command == "show":
self.refresh()
self._menu.popup(QCursor.pos())
def request_quit(self) -> None:
"""Stop the manager without blocking the GUI, then leave the event loop."""
if self._stopping:
return
self._stopping = True
logger.info("Stopping")
self._title_action.setText("Stopping…")
self._status_action.setText("")
for action in (self._autostart_action, self._log_action, self._quit_action):
action.setEnabled(False)
for row in self._rows:
row.setVisible(False)
self._tray.setToolTip("Naneos Devices – stopping")
self._manager.stop()
self._quit_deadline = time.monotonic() + self._quit_timeout
self._quit_timer.start(QUIT_POLL_MS)
def _check_stopped(self) -> None:
if self._manager.is_alive() and time.monotonic() < self._quit_deadline:
return
self._quit_timer.stop()
if self._manager.is_alive():
self._gave_up = True
logger.warning("The device manager did not stop in time, quitting anyway")
self._tray.hide()
self._app.quit()
def _on_about_to_quit(self) -> None:
"""The OS is ending the session, or quit() was called: the last chance to stop.
Called for both aboutToQuit and commitDataRequest, and it blocks the GUI thread, so
it waits at most once, and not at all after Quit has already waited for nothing.
"""
self._poll_timer.stop()
if self._final_stop_done:
return
self._final_stop_done = True
if self._gave_up or not self._manager.is_alive():
return
self._manager.stop()
self._manager.join(timeout=SESSION_END_JOIN_SECONDS)
|