{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "7d3c9812",
   "metadata": {},
   "source": [
    "# 17-12 · Mouse Enter/Leave i hover\n",
    "\n",
    "Praktyka do sekcji [„Mouse Enter/Leave i hover”"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6151c561",
   "metadata": {},
   "source": [
    "## Cel\n",
    "\n",
    "Zbuduj prosty efekt hover- przez<Enter>/<Leave>— bez jednego kliknięcia."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "5ca01252",
   "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": "37bb1998",
   "metadata": {},
   "source": [
    "## Sprawa robocza"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "0af1b0ac",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T10:12:47.207805Z",
     "iopub.status.busy": "2026-09-03T10:12:47.207695Z",
     "iopub.status.idle": "2026-09-03T10:12:47.355549Z",
     "shell.execute_reply": "2026-09-03T10:12:47.354693Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "После Enter: #B9A0FC\n",
      "После Leave: #FAFAFC\n"
     ]
    }
   ],
   "source": [
    "import tkinter as tk\n",
    "\n",
    "root = tk.Tk()\n",
    "button = tk.Button(root, text=\"Наведите на меня\")\n",
    "button.pack()\n",
    "\n",
    "def on_enter(_event):\n",
    "    button.config(bg=\"#B9A0FC\")\n",
    "\n",
    "def on_leave(_event):\n",
    "    button.config(bg=\"#FAFAFC\")\n",
    "\n",
    "button.bind(\"<Enter>\", on_enter)\n",
    "button.bind(\"<Leave>\", on_leave)\n",
    "root.update()\n",
    "\n",
    "button.event_generate(\"<Enter>\")\n",
    "root.update()\n",
    "print(\"После Enter:\", button.cget(\"bg\"))\n",
    "\n",
    "button.event_generate(\"<Leave>\")\n",
    "root.update()\n",
    "print(\"После Leave:\", button.cget(\"bg\"))\n",
    "root.destroy()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "d5a46a1a",
   "metadata": {},
   "source": [
    "## Zadanie niezależne od zadania ★★\n",
    "\n",
    "Ułóż trzy przyciski w rzędzie i podświetl ten najechany, zapewniając, że pozostałe dwa pozostają w zwykłym kolorze."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "3c54c28b",
   "metadata": {
    "execution": {
     "iopub.execute_input": "2026-09-03T10:12:47.357050Z",
     "iopub.status.busy": "2026-09-03T10:12:47.356835Z",
     "iopub.status.idle": "2026-09-03T10:12:47.461486Z",
     "shell.execute_reply": "2026-09-03T10:12:47.460950Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Цвета после наведения на кнопку 1: ['#FAFAFC', '#B9A0FC', '#FAFAFC']\n",
      "Цвета после ухода курсора:       ['#FAFAFC', '#FAFAFC', '#FAFAFC']\n",
      "Подсвечивается только наведённая кнопка, остальные остаются обычными.\n"
     ]
    }
   ],
   "source": [
    "root = tk.Tk()\n",
    "OBYCHNYJ = \"#FAFAFC\"\n",
    "PODSVETKA = \"#B9A0FC\"\n",
    "\n",
    "knopki = []\n",
    "for i in range(3):\n",
    "    b = tk.Button(root, text=f\"Кнопка {i}\", bg=OBYCHNYJ)\n",
    "    b.pack(side=\"left\")\n",
    "    # k=b to ta sama technika „zamrażania”\n",
    "    b.bind(\"<Enter>\", lambda _event, k=b: k.config(bg=PODSVETKA))\n",
    "    b.bind(\"<Leave>\", lambda _event, k=b: k.config(bg=OBYCHNYJ))\n",
    "    knopki.append(b)\n",
    "root.update()\n",
    "\n",
    "knopki[1].event_generate(\"<Enter>\")\n",
    "root.update()\n",
    "cveta = [k.cget(\"bg\") for k in knopki]\n",
    "print(\"Цвета после наведения на кнопку 1:\", cveta)\n",
    "assert cveta == [OBYCHNYJ, PODSVETKA, OBYCHNYJ], \"подсвечена должна быть ровно одна кнопка\"\n",
    "\n",
    "knopki[1].event_generate(\"<Leave>\")\n",
    "root.update()\n",
    "print(\"Цвета после ухода курсора:      \", [k.cget(\"bg\") for k in knopki])\n",
    "assert all(k.cget(\"bg\") == OBYCHNYJ for k in knopki)\n",
    "print(\"Подсвечивается только наведённая кнопка, остальные остаются обычными.\")\n",
    "root.destroy()"
   ]
  }
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