71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
"""Application entry point for the PyQt GUI."""
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from __future__ import annotations
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import os
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from pathlib import Path
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import signal
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import sys
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import pyqtgraph as pg
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from PyQt6.QtCore import QTimer
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from PyQt6.QtWidgets import QApplication
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# Ensure imports are resolved when started as a script.
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PROJECT_ROOT = Path(__file__).resolve().parents[2]
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if str(PROJECT_ROOT) not in sys.path:
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sys.path.insert(0, str(PROJECT_ROOT))
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from python_app.gui.app_window import AppWindow
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from python_app.gui.theme import apply_light_theme
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def _is_headless() -> bool:
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"""Return whether the launcher requested a non-interactive deployment."""
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return os.environ.get("RADAR_SYSTEM_HEADLESS", "").strip().lower() in {
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"1",
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"true",
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"yes",
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"on",
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}
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def _install_unix_signal_handlers(app: QApplication, window: AppWindow) -> None:
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"""Route SIGINT and SIGTERM through the Qt event loop into a clean shutdown.
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`window.close()` runs `closeEvent`, which aborts any active capture and
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shuts down managed C++ processes; only then does the Qt loop exit. A
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short repeating timer keeps the Python interpreter pinned in the event
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loop just long enough to deliver pending signals.
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"""
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def _request_shutdown(*_args: object) -> None:
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window.close()
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app.quit()
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for sig in (signal.SIGINT, signal.SIGTERM):
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signal.signal(sig, _request_shutdown)
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keepalive_timer = QTimer(app)
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keepalive_timer.setInterval(200)
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keepalive_timer.timeout.connect(lambda: None)
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keepalive_timer.start()
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def main() -> int:
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"""Run Qt event loop and show main radar control window."""
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app = QApplication(sys.argv)
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apply_light_theme(app)
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# PyQtGraph foreground controls axis lines, tick text, labels, and titles.
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pg.setConfigOptions(antialias=True, background="#ffffff", foreground="#ffffff")
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window = AppWindow(PROJECT_ROOT)
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if _is_headless():
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_install_unix_signal_handlers(app, window)
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else:
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window.showMaximized()
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return app.exec()
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if __name__ == "__main__":
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raise SystemExit(main())
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