superstar_v2/PrimaryFormParts/SongSearch/PrimaryForm.SongSearch.cs

namespace DualScreenDemo
{
    /* 
     * 主要視窗 (PrimaryForm) 的部分定義
     * 負責初始化搜尋按鈕並處理歌曲搜尋 UI 相關邏輯
     */
    public partial class PrimaryForm
    {
        // 各種歌曲搜尋按鈕及其對應的背景圖片 (一般狀態 / 啟動狀態)
        private Button zhuyinSearchSongButton;
        private Bitmap zhuyinSearchSongNormalBackground;
        private Bitmap zhuyinSearchSongActiveBackground;
        private Button englishSearchSongButton;
        private Bitmap englishSearchSongNormalBackground;
        private Bitmap englishSearchSongActiveBackground;
        private Button wordCountSearchSongButton;
        private Bitmap wordCountSearchSongNormalBackground;
        private Bitmap wordCountSearchSongActiveBackground;
        private Button pinyinSearchSongButton;
        private Bitmap pinyinSearchSongNormalBackground;
        private Bitmap pinyinSearchSongActiveBackground;
        private Button handWritingSearchSongButton;
        private Bitmap handWritingSearchSongNormalBackground;
        private Bitmap handWritingSearchSongActiveBackground;
        private Button numberSearchSongButton;
        private Bitmap numberSearchSongNormalBackground;
        private Bitmap numberSearchSongActiveBackground;

        /// <summary>
        /// 點擊「歌曲搜尋」按鈕時的事件處理函式
        /// 1. 更新導航按鈕的背景圖片，使「歌曲搜尋」按鈕顯示為啟動狀態
        /// 2. 隱藏其他搜尋/分類 UI，僅顯示歌曲搜尋選單
        /// 3. 若有 QR Code 顯示，則將其隱藏
        /// </summary>
        private void SongSearchButton_Click(object sender, EventArgs e)
        {
            // 更新導航按鈕的背景圖片
            newSongAlertButton.BackgroundImage = newSongAlertNormalBackground;
            hotPlayButton.BackgroundImage = hotPlayNormalBackground;
            singerSearchButton.BackgroundImage = singerSearchNormalBackground;
            songSearchButton.BackgroundImage = songSearchActiveBackground;
            languageSearchButton.BackgroundImage = languageSearchNormalBackground;
            groupSearchButton.BackgroundImage = groupSearchNormalBackground;
            categorySearchButton.BackgroundImage = categorySearchNormalBackground;
            orderedSongsButton.BackgroundImage = orderedSongsNormalBackground;
            myFavoritesButton.BackgroundImage = myFavoritesNormalBackground;
            promotionsButton.BackgroundImage = promotionsNormalBackground;
            deliciousFoodButton.BackgroundImage = deliciousFoodNormalBackground;
            isOnOrderedSongsPage = false;

            ResetinputBox();
            string query = $"SELECT * FROM song_library_cache WHERE language_name = '國語' LIMIT 100";
            var searchResult = SearchSongs_Mysql(query);
            currentPage = 0; 
            currentSongList = searchResult; 
            totalPages = (int)Math.Ceiling((double)searchResult.Count / itemsPerPage);

            
            multiPagePanel.currentPageIndex = 0;
            multiPagePanel.LoadSongs(currentSongList);

            // 隱藏其他 UI
            SetHotSongButtonsVisibility(false);
            SetNewSongButtonsVisibility(false);
            SetSingerSearchButtonsVisibility(false);
            SetPictureBoxLanguageButtonsVisibility(false);
            SetGroupButtonsVisibility(false);
            SetPictureBoxCategoryAndButtonsVisibility(false);
            SetZhuYinSingersAndButtonsVisibility(false);
            SetZhuYinSongsAndButtonsVisibility(false);
            SetEnglishSingersAndButtonsVisibility(false);
            SetPinYinSingersAndButtonsVisibility(false);
            SetPinYinSongsAndButtonsVisibility(false);
            SetPictureBoxToggleLightAndButtonsVisibility(false);
            SetPictureBoxSceneSoundEffectsAndButtonsVisibility(false);
            
            // 顯示歌曲搜尋選單按鈕
            SetSongSearchButtonsVisibility(true);

            // 隱藏 QR Code (若有)
            if (pictureBoxQRCode != null)
            {
                pictureBoxQRCode.Visible = false;
                closeQRCodeButton.Visible = false;
            }
        }
        
        /// <summary>
        /// 設定「歌曲搜尋」相關按鈕的可見性
        /// </summary>
        /// <param name="isVisible">是否顯示</param>
        private void SetSongSearchButtonsVisibility(bool isVisible)
        {
            pictureBox4.Visible = isVisible; // 控制搜尋 UI 背景的可見性

            // 歌曲搜尋的按鈕陣列
            Button[] songSearchButtons = { 
                zhuyinSearchSongButton, 
                englishSearchSongButton, 
                wordCountSearchSongButton, 
                pinyinSearchSongButton, 
                handWritingSearchSongButton, 
                numberSearchSongButton 
            };

            // 設定按鈕可見性，若顯示則移至最前
            foreach (var button in songSearchButtons)
            {
                button.Visible = isVisible;
                if (isVisible)
                {
                    button.BringToFront();
                }
            }
        }

        /// <summary>
        /// 初始化所有「歌曲搜尋」按鈕
        /// 依據不同的搜尋方式 (注音、英文、拼音、筆劃、手寫、數字) 建立對應按鈕
        /// </summary>
        private void InitializeButtonsForSongSearch()
        {
            // 初始化「注音搜尋」按鈕
            InitializeSearchButton(ref zhuyinSearchSongButton, "zhuyinSearchSongButton",
                1214, 230, 209, 59, ref zhuyinSearchSongNormalBackground, ref zhuyinSearchSongActiveBackground,
                normalStateImageSongQuery, mouseDownImageSongQuery, ZhuyinSearchSongsButton_Click);

            // 初始化「英文搜尋」按鈕
            InitializeSearchButton(ref englishSearchSongButton, "englishSearchSongButton",
                1214, 293, 209, 58, ref englishSearchSongNormalBackground, ref englishSearchSongActiveBackground,
                normalStateImageSongQuery, mouseDownImageSongQuery, EnglishSearchSongsButton_Click);

            // 初始化「拼音搜尋」按鈕
            InitializeSearchButton(ref pinyinSearchSongButton, "pinyinSearchSongButton",
                1214, 356, 209, 58, ref pinyinSearchSongNormalBackground, ref pinyinSearchSongActiveBackground,
                normalStateImageSongQuery, mouseDownImageSongQuery, PinyinSearchSongsButton_Click);

            // 初始化「筆劃搜尋」按鈕
            InitializeSearchButton(ref wordCountSearchSongButton, "wordCountSearchSongButton",
                1214, 418, 209, 59, ref wordCountSearchSongNormalBackground, ref wordCountSearchSongActiveBackground,
                normalStateImageSongQuery, mouseDownImageSongQuery, WordCountSearchSongsButton_Click);

            // 初始化「手寫搜尋」按鈕
            InitializeSearchButton(ref handWritingSearchSongButton, "handWritingSearchSongButton",
                1214, 481, 209, 59, ref handWritingSearchSongNormalBackground, ref handWritingSearchSongActiveBackground,
                normalStateImageSongQuery, mouseDownImageSongQuery, HandWritingSearchButtonForSongs_Click);

            // 初始化「數字搜尋」按鈕
            InitializeSearchButton(ref numberSearchSongButton, "numberSearchSongButton",
                1214, 544, 209, 58, ref numberSearchSongNormalBackground, ref numberSearchSongActiveBackground,
                normalStateImageSongQuery, mouseDownImageSongQuery, SongIDSearchSongsButton_Click);
        }
    }
}