{
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  {
   "cell_type": "markdown",
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   "metadata": {},
   "source": [
    "# 18-02 · Płótno (Canvas)\n",
    "\n",
    "Praktyka do sekcji [„Konfiguracja ekranu. Tworzymy płótno”](/pl/chapters/rozdzial-18/18-02-ekran-holst.html)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "ddacbea8",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Utwórz Canvas i narysuj na nim ręcznie."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f5650ea8",
   "metadata": {},
   "source": [
    "## O mainloop() i wydarzeniach myszy na tym laptopie\n",
    "\n",
    "Zamiast `root.mainloop()` używany tutaj `root.update()` + `root.destroy()`. A zamiast prawdziwych kliknięć myszką wywołujemy funkcje-obsługujące bezpośrednio z małym obiektem `FakeEvent(x, y)` zamiast rzeczywistego zdarzenia, Tkinter w rzeczywistej aplikacji przekazuje obiekt o tych samych polach `.x`/`.y`, więc kod obsługi sprawdzany jest naprawdę."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2f8024b7",
   "metadata": {},
   "source": [
    "## Sprawa robocza"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "00a4096d",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T00:51:13.183391Z",
     "iopub.status.busy": "2026-09-03T00:51:13.183238Z",
     "iopub.status.idle": "2026-09-03T00:51:13.375130Z",
     "shell.execute_reply": "2026-09-03T00:51:13.373945Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Фигур на холсте: 1\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "canvas = tk.Canvas(root, width=600, height=400, bg=\"white\")\n",
    "canvas.pack()\n",
    "\n",
    "canvas.create_line(10, 10, 100, 100, fill=\"black\", width=2)\n",
    "print(\"Фигур на холсте:\", len(canvas.find_all()))\n",
    "root.update()\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "416a1965",
   "metadata": {},
   "source": [
    "## Podstawowa praktyka zadań ★\n",
    "\n",
    "Narysuj prostokąt i owal bezpośrednio za pomocą poleceń create_rectangle/create_oval."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "a30b3b04",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T00:51:13.377137Z",
     "iopub.status.busy": "2026-09-03T00:51:13.376932Z",
     "iopub.status.idle": "2026-09-03T00:51:13.504469Z",
     "shell.execute_reply": "2026-09-03T00:51:13.503238Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Фигур на холсте: 2\n"
     ]
    }
   ],
   "source": [
    "root = tk.Tk()\n",
    "canvas = tk.Canvas(root, width=600, height=400, bg=\"white\")\n",
    "\n",
    "canvas.create_rectangle(50, 50, 150, 120, outline=\"red\", width=3)\n",
    "canvas.create_oval(200, 50, 300, 150, outline=\"blue\", width=3)\n",
    "\n",
    "print(\"Фигур на холсте:\", len(canvas.find_all()))\n",
    "root.update()\n",
    "root.destroy()"
   ]
  }
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