{
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  {
   "cell_type": "markdown",
   "id": "3e3fb0f3",
   "metadata": {},
   "source": [
    "# 17-01 · Привязка событий\n",
    "\n",
    "Практика к разделу [«Привязка событий»](../../site/chapters/glava-17/17-01-privyazka-sobytij.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f98d4cb4",
   "metadata": {},
   "source": [
    "## Цель\n",
    "\n",
    "Освоить .bind() для реакции на события клавиатуры."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "07603773",
   "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": "21f2e558",
   "metadata": {},
   "source": [
    "## Рабочий пример"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "66b25bbd",
   "metadata": {
    "execution": {
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     "shell.execute_reply": "2026-08-14T21:02:24.473168Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Нажатия: []\n",
      "Текст метки: Нажмите любую клавишу\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "label = tk.Label(root, text=\"Нажмите любую клавишу\", font=(\"Arial\", 14))\n",
    "label.pack(padx=20, pady=20)\n",
    "\n",
    "nazhatiya = []\n",
    "\n",
    "def na_klavishu(event):\n",
    "    nazhatiya.append(event.keysym)\n",
    "    label.config(text=f\"Вы нажали: {event.keysym}\")\n",
    "\n",
    "root.bind(\"<Key>\", na_klavishu)\n",
    "root.update()\n",
    "\n",
    "# программно \"нажимаем\" клавишу, как это сделал бы пользователь\n",
    "label.event_generate(\"<Key>\", keysym=\"Up\")\n",
    "root.update()\n",
    "\n",
    "print(\"Нажатия:\", nazhatiya)\n",
    "print(\"Текст метки:\", label.cget(\"text\"))\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "e8e60e01",
   "metadata": {},
   "source": [
    "## Задание ★ Базовая практика\n",
    "\n",
    "Привяжите обработчик к событию `<Return>` (клавиша Enter) вместо `<Key>`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "2012cd97",
   "metadata": {
    "execution": {
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Ожидание Enter\n"
     ]
    }
   ],
   "source": [
    "root = tk.Tk()\n",
    "label = tk.Label(root, text=\"Ожидание Enter\")\n",
    "\n",
    "def na_enter(event):\n",
    "    label.config(text=\"Enter нажат!\")\n",
    "\n",
    "root.bind(\"<Return>\", na_enter)\n",
    "root.update()\n",
    "label.event_generate(\"<Return>\")\n",
    "root.update()\n",
    "\n",
    "print(label.cget(\"text\"))\n",
    "root.destroy()"
   ]
  }
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