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   "source": [
    "# 16-25 · Klasa aplikacji i ustawienia\n",
    "\n",
    "Praktyka do [Klasa aplikacji i Ustawienia trwałe](.. /.. /site/chapters/glava-16/16-25-klass-prilozheniya-i-nastrojki.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7cfc8c5f",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Ustawienia trwałe dla GUI są takie same jak w rozdziale 15."
   ]
  },
  {
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   "execution_count": 1,
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    "execution": {
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     "iopub.status.busy": "2026-08-18T21:45:21.750276Z",
     "iopub.status.idle": "2026-08-18T21:45:21.768771Z",
     "shell.execute_reply": "2026-08-18T21:45:21.768311Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'theme': 'light', 'window_width': 900}\n",
      "{'theme': 'dark', 'window_width': 1024}\n"
     ]
    }
   ],
   "source": [
    "import json\n",
    "from pathlib import Path\n",
    "\n",
    "DEFAULT_SETTINGS = {\"theme\": \"light\", \"window_width\": 900}\n",
    "\n",
    "def load_settings(path):\n",
    "    if not path.exists():\n",
    "        return dict(DEFAULT_SETTINGS)\n",
    "    with path.open(\"r\", encoding=\"utf-8\") as f:\n",
    "        return json.load(f)\n",
    "\n",
    "def save_settings(path, settings):\n",
    "    with path.open(\"w\", encoding=\"utf-8\") as f:\n",
    "        json.dump(settings, f, ensure_ascii=False, indent=2)\n",
    "\n",
    "settings_path = Path(\"gui_settings.json\")\n",
    "settings_path.unlink(missing_ok=True)\n",
    "defaults = load_settings(settings_path)\n",
    "save_settings(settings_path, {\"theme\": \"dark\", \"window_width\": 1024})\n",
    "loaded = load_settings(settings_path)\n",
    "print(defaults)\n",
    "print(loaded)"
   ]
  }
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