gui.py

from typing import Callable
from PyQt5.QtWidgets import *
from board import Board


class Gui:

    board: Board
    _layout: QGridLayout

    def __init__(self, board: Board):
        self.board = board

    def show(self):
        app = QApplication([])
        window = QWidget()
        window.setWindowTitle('Tic tac toe')
        self._layout = QGridLayout(window)
        self._create_buttons()

        window.show()
        app.exec()

    def _create_buttons(self):
        for x in range(self.board.board_size):
            for y in range(self.board.board_size):
                field_content = self.board.fields[x][y]
                button = self._create_button(field_content, lambda _, x=x, y=y: self.click_handler(x, y))
                self._layout.addWidget(button, x, y)

    def _update_buttons(self):
        for x in range(self.board.board_size):
            for y in range(self.board.board_size):
                field_content = self.board.fields[x][y]
                button = self._layout.itemAtPosition(x, y).widget()
                button.setText(field_content)
                button.setDisabled(field_content != '')

    @staticmethod
    def _create_button(field_content: str, handler: Callable[[bool], None]) -> QWidget:
        button = QToolButton()
        button.setFixedSize(30, 30)
        button.setText(field_content)
        button.setDisabled(field_content != '')
        button.clicked.connect(handler)
        return button

    def click_handler(self, x: int, y: int):
        self.board.move((x, y))
        self.board.cpu_move()
        self._update_buttons()