main.py

import os
import warnings
import sys
import platform

from PySide6 import QtWidgets, QtCore
from PySide6.QtGui import QFont
from src.Model.Configuration import Configuration
from src.Controller.TopLevelController import Controller
warnings.filterwarnings("ignore")

QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling, True)

if __name__ == "__main__":

    # On some configurations error traceback is not being displayed
    #     when the program crashes. This is a workaround.
    sys._excepthook = sys.excepthook

    def exception_hook(exctype, value, traceback):
        print(exctype, value, traceback)
        sys._excepthook(exctype, value, traceback)
        sys.exit(1)

    sys.excepthook = exception_hook

    os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"
    app = QtWidgets.QApplication(sys.argv)

    print("PDPI: " + str(app.primaryScreen().physicalDotsPerInch()))

    # Set the font to Segoe UI, 9, when in windows OS
    if platform.system() == 'Windows':
        f = QFont("Segoe UI", 9)
        app.setFont(f)
    elif platform.system() == 'Darwin':
        f = QFont("Helvetica Neue", 13)
        app.setFont(f)

    if len(sys.argv) > 1:
        controller = Controller(default_directory=sys.argv[1])
        controller.show_open_patient()
    else:
        # Get the default DICOM directory from SQLite database
        # stored in a hidden directory in the user home directory
        configuration = Configuration()
        default_dir = configuration.get_default_directory()
        if default_dir is None:
            controller = Controller()
            controller.show_first_time_welcome()
        else:
            controller = Controller(default_directory=default_dir)
            controller.show_welcome()

    sys.exit(app.exec_())