main.py

import pygame
from random import choices
from random import uniform
from math import exp
import sys
import platform
from PySide2 import QtCore, QtGui, QtWidgets
from PySide2.QtCore import (QCoreApplication, QPropertyAnimation, QDate, QDateTime, QMetaObject, QObject, QPoint, QRect, QSize, QTime, QUrl, Qt, QEvent)
from PySide2.QtGui import (QBrush, QColor, QConicalGradient, QCursor, QFont, QFontDatabase, QIcon, QKeySequence, QLinearGradient, QPalette, QPainter, QPixmap, QRadialGradient)
from PySide2.QtWidgets import *
import os
## ==> SPLASH SCREEN
from ui_splash_screen import Ui_SplashScreen

## ==> MAIN WINDOW
from ui_main import Ui_MainWindow

## ==> GLOBALS
counter = 0

# YOUR APPLICATION
class MainWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        # MAIN WINDOW LABEL
#        QtCore.QTimer.singleShot(1500, lambda: self.setStyleSheet("background-color: #222; color: #FFF"))

        
# SPLASH SCREEN
class SplashScreen(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.ui = Ui_SplashScreen()
        self.ui.setupUi(self)

        ## UI ==> INTERFACE CODES
        
        ## REMOVE TITLE BAR
        self.setWindowFlag(QtCore.Qt.FramelessWindowHint)
        self.setAttribute(QtCore.Qt.WA_TranslucentBackground)


        ## DROP SHADOW EFFECT
        self.shadow = QGraphicsDropShadowEffect(self)
        self.shadow.setBlurRadius(20)
        self.shadow.setXOffset(0)
        self.shadow.setYOffset(0)
        self.shadow.setColor(QColor(0, 0, 0, 60))
        self.ui.dropShadowFrame.setGraphicsEffect(self.shadow)

        ## QTIMER ==> START
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.progress)
        # TIMER IN MILLISECONDS
        self.timer.start(35)

        # CHANGE DESCRIPTION

        # Initial Text
        self.ui.label_description.setText("<strong>WELCOME</strong> TO THE OS PROJCET")

        # Change Texts
        QtCore.QTimer.singleShot(1500, lambda: self.ui.label_description.setText("<strong>LOADING</strong> TICTACTOE"))
        QtCore.QTimer.singleShot(3000, lambda: self.ui.label_description.setText("<strong>LOADING</strong> TEXTEDITOR"))


        self.show()
        
        ## ==> END ##

    def progress(self):

        global counter

        # SET VALUE TO PROGRESS BAR
        self.ui.progressBar.setValue(counter)

        # CLOSE SPLASH SCREE AND OPEN APP
        if counter > 100:
            # STOP TIMER
            self.timer.stop()
            self.close()
            b()
            
        # INCREASE COUNTER
        counter += 1

def b():
	#exec(open('game.py').read())---needs to be changed
	os.system('python3 game.py')

	

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = SplashScreen()
    #import game
    #exec('game.py')
    sys.exit(app.exec_())