{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "6541e5be",
   "metadata": {},
   "source": [
    "# 16-04 · Zmienne Tkinter\n",
    "\n",
    "Praktyka do sekcji [„Zmienne Tkinter”"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "80d7d598",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Opanować StringVar i aktualizację powiązanych widżetów."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "014c4c65",
   "metadata": {},
   "source": [
    "## Pro mainloop() w tym laptopie\n",
    "\n",
    "W normalnym życiu `.py`- pliku aplikacja jest uruchamiana przez `root.mainloop()` - To polecenie „zamraża” `root.mainloop()` zadzwonimy `root.update()` (obsługuje zdarzenia raz, bez oczekiwania) a następnie `root.destroy()` — interfejs buduje się dokładnie tak samo, po prostu bez nieskończonego oczekiwania na końcu."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "50e5c0c4",
   "metadata": {},
   "source": [
    "## Sprawa robocza"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "2b403f95",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-18T21:45:02.871445Z",
     "iopub.status.busy": "2026-08-18T21:45:02.871312Z",
     "iopub.status.idle": "2026-08-18T21:45:03.010594Z",
     "shell.execute_reply": "2026-08-18T21:45:03.010037Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "До смены: Гость\n",
      "После смены: Cartesian\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "imya = tk.StringVar(value=\"Гость\")\n",
    "\n",
    "label = tk.Label(root, textvariable=imya)\n",
    "label.pack()\n",
    "\n",
    "print(\"До смены:\", label.cget(\"text\"))\n",
    "\n",
    "imya.set(\"Cartesian\")\n",
    "root.update()   # применяем изменение к виджету\n",
    "\n",
    "print(\"После смены:\", label.cget(\"text\"))\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0251954a",
   "metadata": {},
   "source": [
    "## Podstawowa praktyka zadań ★\n",
    "\n",
    "Stwórz IntVar z licznikiem, który zwiększa się w momencie wywołania funkcji."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "dbac6249",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-18T21:45:03.011616Z",
     "iopub.status.busy": "2026-08-18T21:45:03.011486Z",
     "iopub.status.idle": "2026-08-18T21:45:03.069657Z",
     "shell.execute_reply": "2026-08-18T21:45:03.069205Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Значение счётчика: 3\n"
     ]
    }
   ],
   "source": [
    "root = tk.Tk()\n",
    "schet = tk.IntVar(value=0)\n",
    "label = tk.Label(root, textvariable=schet)\n",
    "label.pack()\n",
    "\n",
    "def uvelichit():\n",
    "    schet.set(schet.get() + 1)\n",
    "\n",
    "uvelichit()\n",
    "uvelichit()\n",
    "uvelichit()\n",
    "root.update()\n",
    "print(\"Значение счётчика:\", schet.get())\n",
    "root.destroy()"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Cartesian Python 3.14",
   "language": "python",
   "name": "cartesian-python314"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.14.6"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}