{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "24e33362",
   "metadata": {},
   "source": [
    "# 17-03 · Переменные и кнопки\n",
    "\n",
    "Практика к разделу [«Создаём глобальные переменные и кнопки»](../../site/chapters/glava-17/17-03-peremennye-knopki.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "a6c76274",
   "metadata": {},
   "source": [
    "## Цель\n",
    "\n",
    "Создать переменные состояния и поле из девяти кнопок."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "38639965",
   "metadata": {},
   "source": [
    "## Про mainloop() в этом ноутбуке\n",
    "\n",
    "Вместо `root.mainloop()` здесь используется `root.update()` + `root.destroy()` — приложение строится точно так же, просто без бесконечного ожидания в конце (см. объяснение в ноутбуках главы 16)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "09af1740",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "810f6c63",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T21:02:25.748135Z",
     "iopub.status.busy": "2026-08-14T21:02:25.748020Z",
     "iopub.status.idle": "2026-08-14T21:02:25.874598Z",
     "shell.execute_reply": "2026-08-14T21:02:25.874168Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Создано кнопок: 9\n",
      "Позиция кнопки 4 (центр): 1 1\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "\n",
    "tekuschij_igrok = \"X\"\n",
    "polya = []\n",
    "igra_okonchena = False\n",
    "\n",
    "pole_frame = tk.Frame(root)\n",
    "pole_frame.pack()\n",
    "\n",
    "for indeks in range(9):\n",
    "    knopka = tk.Button(pole_frame, text=\"\", font=(\"Arial\", 24, \"bold\"), width=3, height=1)\n",
    "    knopka.grid(row=indeks // 3, column=indeks % 3)\n",
    "    polya.append(knopka)\n",
    "\n",
    "print(\"Создано кнопок:\", len(polya))\n",
    "print(\"Позиция кнопки 4 (центр):\", polya[4].grid_info()[\"row\"], polya[4].grid_info()[\"column\"])\n",
    "root.update()\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "e93c8979",
   "metadata": {},
   "source": [
    "## Задание ★ Базовая практика\n",
    "\n",
    "Проверьте, что indeks // 3 и indeks % 3 дают правильные координаты для всех девяти клеток."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "6367ebfb",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-14T21:02:25.875832Z",
     "iopub.status.busy": "2026-08-14T21:02:25.875713Z",
     "iopub.status.idle": "2026-08-14T21:02:25.878077Z",
     "shell.execute_reply": "2026-08-14T21:02:25.877637Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0 -> row 0 col 0\n",
      "1 -> row 0 col 1\n",
      "2 -> row 0 col 2\n",
      "3 -> row 1 col 0\n",
      "4 -> row 1 col 1\n",
      "5 -> row 1 col 2\n",
      "6 -> row 2 col 0\n",
      "7 -> row 2 col 1\n",
      "8 -> row 2 col 2\n"
     ]
    }
   ],
   "source": [
    "for indeks in range(9):\n",
    "    print(indeks, \"-> row\", indeks // 3, \"col\", indeks % 3)"
   ]
  }
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