Mastering GUI Programming with Python

The main window class

In MainWindow.__init__(), we'll start by creating a board and a QGraphicsView object to display it:

        self.board = TTTBoard()        self.board_view = qtw.QGraphicsView()        self.board_view.setScene(self.board)        self.setCentralWidget(self.board_view)

Now we need to create an instance of the game engine and connect its signals. In order to allow us to start games over and over, we'll create a separate method for this:

    def start_game(self):        self.board.clear_board()        self.game = TicTacToeEngine()        self.game.game_won.connect(self.game_won)        self.game.game_draw.connect(self.game_draw)

This method clears the board, and then it creates an instance of the game engine object, connecting the engine's signals to MainWindow methods to handle ...