start.py

import sys
import multiprocessing
import argparse
import matplotlib
matplotlib.use('QT5Agg') # Ensures that the Qt5 backend is used, otherwise there might be some issues on some OSs (Mac)
from com_window.main import ComWindow
from PyQt5 import QtWidgets, QtCore
from profiles.rockets.tantalus import TantalusProfile
from util.self_test import SelfTest

if hasattr(QtCore.Qt, 'AA_EnableHighDpiScaling'):
    QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling, True)

if hasattr(QtCore.Qt, 'AA_UseHighDpiPixmaps'):
    QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps, True)

MIN_APP_FONT_POINT_SIZE = 8

if __name__ == "__main__":
    # Pyinstaller fix https://stackoverflow.com/questions/32672596/pyinstaller-loads-script-multiple-times
    multiprocessing.freeze_support()

    parser = argparse.ArgumentParser()

    parser.add_argument("-t", "--self-test", action='store_true')

    args, unparsed_args = parser.parse_known_args()

    # QApplication expects the first argument to be the program name.
    qt_args = sys.argv[:1] + unparsed_args
    app = QtWidgets.QApplication(qt_args)

    font = app.font()
    font.setPointSize(max(MIN_APP_FONT_POINT_SIZE, font.pointSize()))
    app.setFont(font)

    if not args.self_test:
        # Open com_window dialog to get startup details
        com_window = ComWindow()
        com_window.show()
        return_code = app.exec_()
        if return_code != 0 or com_window.chosen_rocket is None or com_window.chosen_connection is None:
            sys.exit(return_code)

        rocket = com_window.chosen_rocket
        connection = com_window.chosen_connection
        main_window = rocket.construct_app(connection)

    else:
        rocket = TantalusProfile()
        connection = rocket.construct_debug_connection()
        main_window = rocket.construct_app(connection)
        test = SelfTest(main_window)
        test.start()

    main_window.show()
    return_code = app.exec_()
    sys.exit(return_code)