main.py

# coding:utf-8
import os
import sys

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication

from app import cfg
from app import MainWindow


if __name__ == "__main__":
    # enable dpi scale
    if cfg.get(cfg.dpiScale) == "Auto":
        QApplication.setHighDpiScaleFactorRoundingPolicy(
            Qt.HighDpiScaleFactorRoundingPolicy.PassThrough
        )
        QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
    else:
        os.environ["QT_ENABLE_HIGHDPI_SCALING"] = "0"
        os.environ["QT_SCALE_FACTOR"] = str(cfg.get(cfg.dpiScale))

    QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps)

    # create application
    app = QApplication(sys.argv)
    app.setAttribute(Qt.AA_DontCreateNativeWidgetSiblings)

    # create main window
    w = MainWindow()
    w.show()

    app.exec_()