{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "5abee512",
   "metadata": {},
   "source": [
    "# 16-08 · Kalkulator napiwków\n",
    "\n",
    "Praktyka do sekcji [„Mini-projekt - aplikacja kalkulatora wskazówek”"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0e386865",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Złóż pełnoprawną aplikację z widżetów rozdziałów."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d309170b",
   "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": "71f4a2f7",
   "metadata": {},
   "source": [
    "## Sprawa robocza"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "f1228fe4",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-18T21:45:06.842283Z",
     "iopub.status.busy": "2026-08-18T21:45:06.842170Z",
     "iopub.status.idle": "2026-08-18T21:45:07.005275Z",
     "shell.execute_reply": "2026-08-18T21:45:07.004729Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Чаевые: 150.00\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "root.title(\"Калькулятор чаевых\")\n",
    "\n",
    "tk.Label(root, text=\"Сумма счёта:\").grid(row=0, column=0, padx=10, pady=10)\n",
    "schet_entry = tk.Entry(root)\n",
    "schet_entry.grid(row=0, column=1)\n",
    "\n",
    "tk.Label(root, text=\"Процент чаевых:\").grid(row=1, column=0, padx=10, pady=10)\n",
    "procent_entry = tk.Entry(root)\n",
    "procent_entry.grid(row=1, column=1)\n",
    "\n",
    "rezultat_label = tk.Label(root, text=\"\", font=(\"Arial\", 14, \"bold\"))\n",
    "rezultat_label.grid(row=3, column=0, columnspan=2, pady=10)\n",
    "\n",
    "def poschitat():\n",
    "    schet = float(schet_entry.get())\n",
    "    procent = float(procent_entry.get())\n",
    "    chaevye = schet * procent / 100\n",
    "    rezultat_label.config(text=f\"Чаевые: {chaevye:.2f}\")\n",
    "\n",
    "tk.Button(root, text=\"Посчитать\", command=poschitat).grid(row=2, column=0, columnspan=2)\n",
    "\n",
    "# programowo wprowadzamy dane i „klikamy” przycisk, tak jak zrobiłby to użytkownik\n",
    "schet_entry.insert(0, \"1000\")\n",
    "procent_entry.insert(0, \"15\")\n",
    "poschitat()\n",
    "\n",
    "root.update()\n",
    "print(rezultat_label.cget(\"text\"))\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "908fcac7",
   "metadata": {},
   "source": [
    "## Sprawdzenie wyniku"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "fffa28b4",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-18T21:45:07.006314Z",
     "iopub.status.busy": "2026-08-18T21:45:07.006175Z",
     "iopub.status.idle": "2026-08-18T21:45:07.008753Z",
     "shell.execute_reply": "2026-08-18T21:45:07.008258Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Верно: чаевые с 1000 при 15% равны 150.0\n"
     ]
    }
   ],
   "source": [
    "assert 1000 * 15 / 100 == 150.0\n",
    "print(\"Верно: чаевые с 1000 при 15% равны 150.0\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "fcd0b32a",
   "metadata": {},
   "source": [
    "## Zadanie niezależne od zadania ★★\n",
    "\n",
    "Sprawdź kalkulator z innymi liczbami."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "22bfd086",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-08-18T21:45:07.010461Z",
     "iopub.status.busy": "2026-08-18T21:45:07.010310Z",
     "iopub.status.idle": "2026-08-18T21:45:07.099670Z",
     "shell.execute_reply": "2026-08-18T21:45:07.099115Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Чаевые: 500.00\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "schet_entry = tk.Entry(root)\n",
    "procent_entry = tk.Entry(root)\n",
    "rezultat_label = tk.Label(root, text=\"\")\n",
    "\n",
    "def poschitat():\n",
    "    schet = float(schet_entry.get())\n",
    "    procent = float(procent_entry.get())\n",
    "    chaevye = schet * procent / 100\n",
    "    rezultat_label.config(text=f\"Чаевые: {chaevye:.2f}\")\n",
    "\n",
    "schet_entry.insert(0, \"2500\")\n",
    "procent_entry.insert(0, \"20\")\n",
    "poschitat()\n",
    "root.update()\n",
    "print(rezultat_label.cget(\"text\"))\n",
    "root.destroy()"
   ]
  }
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