{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "2c5cc1ec",
   "metadata": {},
   "source": [
    "# 18-30 · Zapisywanie i ładowanie JSON\n",
    "\n",
    "Praktyka do [Zapis i wczytanie JSON](.. /.. /site/chapters/glava-18/18-30-sohranenie-json.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c45f110f",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Zapisz dokument rysunku w JSON i załaduj go ponownie — bez utraty figur."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7a4858de",
   "metadata": {},
   "source": [
    "## Pro mainloop() w tym laptopie\n",
    "\n",
    "Zamiast `root.mainloop()` używany tutaj `root.update()` + `root.destroy()` jest takie, że aplikacja jest zbudowana dokładnie tak samo, tylko bez niekończącego się oczekiwania na końcu (zobacz wyjaśnienie w rozdziale 16)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d6c00565",
   "metadata": {},
   "source": [
    "## Sprawa robocza"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "e8042c54",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T00:52:25.451873Z",
     "iopub.status.busy": "2026-09-03T00:52:25.451705Z",
     "iopub.status.idle": "2026-09-03T00:52:25.613287Z",
     "shell.execute_reply": "2026-09-03T00:52:25.612646Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[Shape(kind='rectangle', coords=[10, 10, 100, 80], color='#2563eb', width=4)]\n"
     ]
    }
   ],
   "source": [
    "import sys\n",
    "sys.path.insert(0, \"../../projects/tkinter/paint-app\")\n",
    "\n",
    "import tkinter as tk\n",
    "from pathlib import Path\n",
    "import paint_app as p\n",
    "\n",
    "root = tk.Tk()\n",
    "app = p.PaintApp(root)\n",
    "\n",
    "app.document = [p.Shape(kind=\"rectangle\", coords=[10, 10, 100, 80], color=\"#2563eb\", width=4)]\n",
    "\n",
    "tmp_path = Path(\"_tmp_practice_drawing.json\")\n",
    "app._write_document(tmp_path)\n",
    "app.load_from_path(tmp_path)\n",
    "\n",
    "print(app.document)\n",
    "tmp_path.unlink()\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "31e07bf9",
   "metadata": {},
   "source": [
    "## Zadanie niezależne od zadania ★★\n",
    "\n",
    "Narysuj prawdziwe kształty na prawdziwym oknie, zapisz przez `app.save_document()` (Ctrl+S), zamknij aplikację, otwórz ponownie i pobierz plik przez `app.load_document()` (Ctrl+O) — rysunek powinien się odtworzyć."
   ]
  }
 ],
 "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"
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 "nbformat": 4,
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