using System.Windows;
using System.Windows.Forms;
using System.Threading;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using System.Windows.Threading;
using System.Xml.Serialization;
using Accord.Video.FFMPEG;
using static System.Net.WebRequestMethods;
using AI.Common.Crypto;


namespace AutomaticallyCropImg
{
    enum EnumResultImgType
    {
        OrigImgWithCropRect,
        CroppedImg,
        BothImgWithCropRectAndCroppedImg,
    }

    public class ImgInfoForSegEntity
    {
        /// <summary>
        /// 图片ID
        /// </summary>
        public string ImgId { get; set; } = string.Empty;

        /// <summary>
        /// 图片路径
        /// </summary>
        public string ImgLocalPath { get; set; } = string.Empty;

        /// <summary>
        /// 裁切是否成功
        /// </summary>
        public bool SegSucceed { get; set; } = false;

        /// <summary>
        /// 裁切后，图像左上点在原始图像上的像素坐标x
        /// </summary>
        public int Left { get; set; } = 0;

        /// <summary>
        /// 裁切后，图像右下点在原始图像上的像素坐标x
        /// </summary>
        public int Right { get; set; } = 0;

        /// <summary>
        /// 裁切后，图像左上点在原始图像上的像素坐标y
        /// </summary>
        public int Top { get; set; } = 0;

        /// <summary>
        /// 裁切后，图像右下点在原始图像上的像素坐标y
        /// </summary>
        public int Bottom { get; set; } = 0;
    }

    public class FileInfosForSeg
    {
        private string _origFilePath;
        private bool _isVideo;
        private string _origFolder;
        private string _randomId;

        public string OrigFilePath { get => _origFilePath; set => _origFilePath = value; }
        public bool IsVideo { get => _isVideo; set => _isVideo = value; }
        public string OrigFolder { get => _origFolder; set => _origFolder = value; }
        public string RandomId { get => _randomId; set => _randomId = value; }

        public FileInfosForSeg(string origFilePath, bool isVideo, string origFolder, string randomId)
        {
            _origFilePath = origFilePath;
            _isVideo = isVideo;
            _origFolder = origFolder;
            _randomId = randomId;
        }
    }


    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private volatile bool _processing = false;
        private string _dstFolder = null;
        private string _dstTxtFolder = null;
        private Dictionary<string, string> _imageFiles = new Dictionary<string, string>();
        private Dictionary<string, string> _videoFiles = new Dictionary<string, string>();
        private Dictionary<string, string> _cropNameOriNameDict = new Dictionary<string, string>();
        private int _sameImgNum = 0;
        private static int _processedCount = 0;
        private static int _totalCount = 0;
        private ConcurrentQueue<FileInfosForSeg> _processingFiles = new ConcurrentQueue<FileInfosForSeg>();
        private ConcurrentBag<ImgInfoForSegEntity> _cropResults = new ConcurrentBag<ImgInfoForSegEntity>();
        private readonly int _threadCount = Math.Max(1, Environment.ProcessorCount / 2 - 1);
        private List<Thread> _processThreads = new List<Thread>();
        private Thread _waitThread = null;
        private volatile bool _closing = false;

        private EnumResultImgType _resulttype;
        private bool _saveCropInfo;
        private bool _rename;
        private string _dataSource = "";

        /// <summary>
        /// 调用CvCore.dll裁图
        /// </summary>
        /// <param name="scrImgData"></param>
        /// <param name="imgInfoIn"></param>
        /// <param name="rectInfoOut">左，上，宽，高</param>
        /// <returns></returns>
        [DllImport(@"CvCropUltImgRegion.dll", CallingConvention = CallingConvention.Cdecl)]
        [return: MarshalAs(UnmanagedType.I1)]
        public static extern bool CropImage(IntPtr scrImgData, int[] imgInfoIn, int[] rectInfoOut);


        public MainWindow()
        {
            InitializeComponent();
        }

        private void OnSelectFolderClick(object sender, RoutedEventArgs e)
        {
            FolderBrowserDialog srcdialog = new FolderBrowserDialog();
            srcdialog.Description = "请选择待裁切图片所在文件夹";
            if (srcdialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                if (string.IsNullOrEmpty(srcdialog.SelectedPath))
                {
                    System.Windows.MessageBox.Show("文件夹路径不能为空", "提示");
                    return;
                }
                if (_dstFolder == null)
                {
                    FolderBrowserDialog dstdialog = new FolderBrowserDialog();
                    dstdialog.Description = "请选择保存裁切结果的文件夹";
                    if (dstdialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                    {
                        if (string.IsNullOrEmpty(dstdialog.SelectedPath))
                        {
                            System.Windows.MessageBox.Show("文件夹路径不能为空", "提示");
                            return;
                        }
                        _dstFolder = dstdialog.SelectedPath;
                    }
                    FolderBrowserDialog dstdialog2 = new FolderBrowserDialog();
                    dstdialog.Description = "为后续手动裁切能找到原图，请选择保存裁切结果图像名称和原图名称组成的 cropNameAndOriName.txt 的文件夹";
                    if (dstdialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                    {
                        if (string.IsNullOrEmpty(dstdialog.SelectedPath))
                        {
                            System.Windows.MessageBox.Show("文件夹路径不能为空", "提示");
                            return;
                        }
                        _dstTxtFolder = dstdialog.SelectedPath;
                    }
                    EnumResultImgType resulttype = new EnumResultImgType();
                    if ((RadioBtnResultCropped.IsChecked ?? false) && (RadioBtnResultCropRect.IsChecked ?? false))
                    {
                        resulttype = EnumResultImgType.BothImgWithCropRectAndCroppedImg;
                    }
                    else if (RadioBtnResultCropped.IsChecked ?? false)
                    {
                        resulttype = EnumResultImgType.CroppedImg;
                    }
                    else if (RadioBtnResultCropRect.IsChecked ?? false)
                    {
                        resulttype = EnumResultImgType.OrigImgWithCropRect;
                    }
                    else
                    {
                        System.Windows.MessageBox.Show("保留裁图框位置信息 和 文件重命名 必须至少选择其中一项", "提示");
                        return;
                    }
                    _resulttype = resulttype;
                    _saveCropInfo = CheckBoxSaveCropInfo.IsChecked != null && (bool)CheckBoxSaveCropInfo.IsChecked;
                    _rename = CheckBoxRename.IsChecked != null && (bool)CheckBoxRename.IsChecked;
                }
                SearchFiles(srcdialog.SelectedPath);
                if (_imageFiles.Count > 0 || _videoFiles.Count > 0)
                {
                    System.Windows.MessageBox.Show("共查询到待脱敏的视频：" + _videoFiles.Count +
                                                   "个，图像：" + _imageFiles.Count + "张，点击确认后立即开始脱敏，请稍候...", "提示");
                    foreach (KeyValuePair<string, string> kvp in _imageFiles)
                    {
                        string imageFile = kvp.Key;
                        string randomId = kvp.Value;
                        var fileInfo = new FileInfosForSeg(imageFile, false, srcdialog.SelectedPath, randomId);
                        _processingFiles.Enqueue(fileInfo);
                    }
                    _totalCount += _imageFiles.Count;
                    _imageFiles.Clear();
                    foreach (KeyValuePair<string, string> kvp in _videoFiles)
                    {
                        string videoFile = kvp.Key;
                        string randomId = kvp.Value;
                        var fileInfo = new FileInfosForSeg(videoFile, true, srcdialog.SelectedPath, randomId);
                        _processingFiles.Enqueue(fileInfo);
                    }
                    _totalCount += _videoFiles.Count;
                    _videoFiles.Clear();;
                    int threadCount = Math.Min(_threadCount, _processingFiles.Count);
                    for (int ni = 0; ni < threadCount; ni++)
                    {
                        if (_processThreads.Count < ni+1)
                        {
                            var thread = new Thread(() => DoImgCrop())
                            {
                                IsBackground = true,
                                Name = "CropThread_"+ni.ToString(),
                            };
                            _processThreads.Add(thread);
                            thread.Start();
                        }
                        else
                        {
                            var thread = _processThreads[ni];
                            if (thread == null || !thread.IsAlive)
                            {
                                thread = new Thread(() => DoImgCrop())
                                {
                                    IsBackground = true,
                                    Name = "CropThread_" + ni.ToString(),
                                };
                                thread.Start();
                            }
                        }
                    }
                }
            }
        }

        private void setDataSourceTextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
        {
            _dataSource = ((System.Windows.Controls.TextBox)sender).Text;
        }
        private byte[] ImageToByteArray(Bitmap bitmap)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                bitmap.Save(ms, ImageFormat.Jpeg);
                return ms.ToArray();
            }
        }

        private void DoImgCrop()
        {
            _processing = true;
            while (!_closing && _processingFiles.Count > 0)
            {
                if (_processingFiles.TryDequeue(out var fileInfo))
                {
                    try
                    {
                        // 创建子文件夹
                        string origFolder = fileInfo.OrigFolder;
                        string origFilePath = fileInfo.OrigFilePath;
                        string fileName = Path.GetFileNameWithoutExtension(origFilePath);
                        string extension = Path.GetExtension(origFilePath);
                        string localSubFolder = Path.GetDirectoryName(origFilePath).Substring(origFolder.Length);
                        if (localSubFolder != string.Empty)
                        {
                            localSubFolder = localSubFolder.Substring(1);
                            string[] subFolders = localSubFolder.Split('\\');
                            string dstFolder = _dstFolder;
                            foreach (var subFolder in subFolders)
                            {
                                if (subFolder != string.Empty)
                                {
                                    dstFolder = Path.Combine(dstFolder, subFolder);
                                    if (!Directory.Exists(dstFolder))
                                    {
                                        Directory.CreateDirectory(dstFolder);
                                    }
                                }
                            }
                        }
                        if (fileInfo.IsVideo)
                        {
                            var videoFileReader = new VideoFileReader();
                            videoFileReader.Open(origFilePath);
                            var frameCount = videoFileReader.FrameCount;
                            // 一个视频用一个固定的裁切框
                            // 为了避免一两幅图上裁切框效果不佳导致整个视频裁切的不好
                            // 先将视频的每一帧取出来，计算裁切框的位置
                            // 将每个裁切框的左上右下角位置排序，取中值，得到最终整个视频的裁切框位置
                            List<int> cropRectLeft = new List<int>();
                            List<int> cropRectTop = new List<int>();
                            List<int> cropRectBottom = new List<int>();
                            List<int> cropRectRight = new List<int>();
                            for (int ni = 0; ni < frameCount; ni+=5)
                            {
                                if (_closing)
                                {
                                    break;
                                }
                                var img = videoFileReader.ReadVideoFrame(ni);
                                if (CropImageWithOpenCVCppdll(img, out var rect))
                                {
                                    cropRectLeft.Add(rect.Left);
                                    cropRectTop.Add(rect.Top);
                                    cropRectRight.Add(rect.Right);
                                    cropRectBottom.Add(rect.Bottom);
                                }
                                img.Dispose();
                            }
                            if (cropRectLeft.Count <= 0)
                            {
                                continue;
                            }
                            cropRectLeft.Sort();
                            cropRectTop.Sort();
                            cropRectRight.Sort();
                            cropRectBottom.Sort();
                            cropRectRight.Reverse();
                            cropRectBottom.Reverse();
                            // 考虑到希望尽量取一个稍微大一点的框，左上角尽量靠左上，右下角尽量靠右下，所以这里没有直接取最中间的结果
                            // 而是取的1/4处（没有取最左上和最右下的点，是为了避免极个别裁切的不好的结果被选用）
                            int index = cropRectLeft.Count / 4;
                            var left = cropRectLeft[index];
                            var top = cropRectTop[index];
                            var bottom = cropRectBottom[index];
                            var right = cropRectRight[index];
                            if (right <= left || bottom <= top)
                            {
                                continue;
                            }
                            var cropRectForWholeVideo = new Rectangle(left, top, right - left, bottom - top);
                            string fileId;
                            if (_rename)
                            {
                                fileId = fileInfo.RandomId.ToString();
                            }
                            else
                            {
                                fileId = fileName;
                            }
                            for (int ni = 0; ni < frameCount; ni++)
                            {
                                if (_closing)
                                {
                                    break;
                                }
                                var img = videoFileReader.ReadVideoFrame(ni);

                                byte[] imageBytes = ImageToByteArray(img);
                                string imgHashCode = HashCode.ComputeHashCode(imageBytes);
                                string imgNewName = _dataSource + "_" + fileId + "_" + ni.ToString() + "_" + imgHashCode + ".jpg";
                                string imgLocalPath = Path.Combine(localSubFolder, imgNewName);
                                _cropNameOriNameDict.Add(imgNewName, origFilePath + "_" + ni.ToString());
                                var segInfo = ProcessOneImage(img, _resulttype, _dstFolder, imgLocalPath, ImageFormat.Jpeg,cropRectForWholeVideo, true);
                                _cropResults.Add(segInfo);
                                img.Dispose();
                                GC.Collect();
                                GC.WaitForFullGCComplete();
                            }
                            videoFileReader.Close();
                            videoFileReader.Dispose();
                            Interlocked.Increment(ref _processedCount);
                            Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() =>
                            {
                                ProgressBar.Value = (int)((double)_processedCount / _totalCount * 100);
                            }));
                        }
                        else
                        {
                            var img = new Bitmap(origFilePath);
                            string fileId;
                            if (_rename)
                            {
                                fileId = fileInfo.RandomId.ToString();
                            }
                            else
                            {
                                fileId = fileName;
                            }
                            byte[] imageBytes = ImageToByteArray(img);
                            string imgHashCode = HashCode.ComputeHashCode(imageBytes);
                            string imgNewName = _dataSource + "_" + fileId + "_" + imgHashCode + extension;
                            string imgLocalPath = Path.Combine(localSubFolder, imgNewName);
                            try
                            {
                                _cropNameOriNameDict.Add(imgNewName, origFilePath);
                            }
                            catch
                            {
                                _sameImgNum++;
                            }
                            var segInfo = ProcessOneImage(img, _resulttype, _dstFolder, imgLocalPath, ImageFormat.Jpeg, Rectangle.Empty);
                            _cropResults.Add(segInfo);
                            img.Dispose();
                            GC.Collect();
                            GC.WaitForFullGCComplete();
                            Interlocked.Increment(ref _processedCount);
                            Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() =>
                            {
                                ProgressBar.Value = (int)((double)_processedCount / _totalCount * 100);
                            }));
                        }
                    }
                    catch (Exception e)
                    {
                        System.Windows.MessageBox.Show("出错了！"+e);
                        while (_processingFiles.Count > 0)
                        {
                            _processingFiles.TryDequeue(out _);
                        }
                    }
                }
                Thread.Sleep(1);
            }
            if (_waitThread == null || !_waitThread.IsAlive)
            {
                _waitThread = new Thread(() => DoWait())
                {
                    IsBackground = true,
                };
                _waitThread.Start();
            }
        }

        private void SaveTxt(string txtPath)
        {
            using (StreamWriter writer = new StreamWriter(txtPath))
            {
                foreach (KeyValuePair<string, string> kvp in _cropNameOriNameDict)
                {
                    writer.WriteLine($"{kvp.Key}: {kvp.Value}");
                }
            }
        }

        private void DoWait()
        {
            while (true)
            {
                bool finish = true;
                for (int ni = 0; ni < _threadCount; ni++)
                {
                    Thread thread = _processThreads.Find(b => b.Name == "CropThread_" + ni.ToString());
                    if (thread == null)
                    {
                        continue;
                    }
                    if (thread.IsAlive)
                    {
                        finish = false;
                        break;
                    }
                    _processThreads.Remove(thread);
                }
                if (finish)
                {
                    // 保存结果
                    if (_saveCropInfo)
                    {
                        var datas = _cropResults.ToList();
                        XmlSerializer xmls = new XmlSerializer(datas.GetType());
                        FileInfo fileinfo = new FileInfo(_dstFolder + "\\croppeddatas_"+DateTime.Now.ToString("yyyyMMdd_HHmmss") +".xml");
                        if (fileinfo.Exists)
                        {
                            fileinfo.Delete();
                        }
                        using (Stream s = fileinfo.OpenWrite())
                        {
                            xmls.Serialize(s, datas);
                        }
                    }
                    System.Windows.MessageBox.Show("裁切完毕! 已过滤重复图像" + _sameImgNum.ToString() + "张！");
                    _processing = false;
                    _processedCount = 0;
                    _totalCount = 0;
                    _cropResults = new ConcurrentBag<ImgInfoForSegEntity>();
                    if (_resulttype == EnumResultImgType.BothImgWithCropRectAndCroppedImg)
                    {
                        string croppedImgFolder = Path.Combine(_dstFolder, "裁切结果图");
                        string cropRectImgFolder = Path.Combine(_dstFolder, "带裁切框原图");
                        string txtPath = Path.Combine(croppedImgFolder, "cropNameAndOriName.txt");
                        SaveTxt(txtPath);
                        txtPath = Path.Combine(cropRectImgFolder, "cropNameAndOriName.txt");
                        SaveTxt(txtPath);
                    }
                    else
                    {
                        string txtPath = Path.Combine(_dstTxtFolder, "cropNameAndOriName.txt");
                        SaveTxt(txtPath);
                    }
                    System.Windows.MessageBox.Show("cropNameAndOriName.txt 保存完毕！");
                    break;
                }
                else
                {
                    Thread.Sleep(1);
                }
            }
        }

        public static bool CropImageWithOpenCVCppdll(Bitmap imagesrc, out Rectangle rectcrop)
        {
            if ((imagesrc.PixelFormat != PixelFormat.Format24bppRgb) && (imagesrc.PixelFormat != PixelFormat.Format32bppArgb) && (imagesrc.PixelFormat != PixelFormat.Format32bppPArgb) && (imagesrc.PixelFormat != PixelFormat.Format32bppRgb))
            {
                rectcrop = Rectangle.Empty;
                return false;
            }
            BitmapData bmData;
            int imgWidth = imagesrc.Width;
            int imgHeight = imagesrc.Height;
            int channels = (imagesrc.PixelFormat == PixelFormat.Format24bppRgb) ? 3 : 4;
            Rectangle rect = new Rectangle(0, 0, imgWidth, imgHeight);
            bmData = imagesrc.LockBits(rect, ImageLockMode.ReadOnly, imagesrc.PixelFormat);
            int[] imginfo = new int[4];
            imginfo[0] = imgWidth;
            imginfo[1] = imgHeight;
            imginfo[2] = bmData.Stride;
            imginfo[3] = channels;
            int[] rectinfo = new int[4];
            if (!CropImage(bmData.Scan0, imginfo, rectinfo))
            {
                imagesrc.UnlockBits(bmData);
                bmData = null;
                rectcrop = Rectangle.Empty;
                return false;
            }
            imagesrc.UnlockBits(bmData);
            bmData = null;
            int rectX = rectinfo[0];
            int rectY = rectinfo[1];
            int rectWidth = rectinfo[2];
            int rectHeight = rectinfo[3];

            if ((rectX < 0) || (rectY < 0) || (rectWidth <= 0) || (rectHeight <= 0) || (rectX + rectWidth > imgWidth) || (rectY + rectHeight > imgHeight))
            {
                rectcrop = Rectangle.Empty;
                return false;
            }
            rectcrop = new Rectangle(rectX, rectY, rectWidth, rectHeight);

            return true;
        }

        public void SearchFiles(string folderName)
        {
            DirectoryInfo folder = new DirectoryInfo(folderName);
            string singleFolderRandomId = Guid.NewGuid().ToString();
            foreach (FileInfo file in folder.GetFiles())
            {
                if (file.Extension == ".png" || file.Extension == ".PNG" ||
                    file.Extension == ".jpg" || file.Extension == ".JPG" || 
                    file.Extension == ".jpeg" || file.Extension == ".JPEG" ||
                    file.Extension == ".bmp" || file.Extension == ".BMP")
                {
                    _imageFiles.Add(file.FullName, singleFolderRandomId);
                }
                if (file.Extension == ".avi" || file.Extension == ".AVI" ||
                    file.Extension == ".mp4" || file.Extension == ".MP4")
                {
                    // 对每个视频添加唯一的随机码，后续标注的时候就不会打乱
                    string singleVideorRandomId = Guid.NewGuid().ToString();
                    _videoFiles.Add(file.FullName, singleVideorRandomId);
                }
            }
            foreach (var subFolder in folder.GetDirectories())
            {
                SearchFiles(subFolder.FullName);
            }
        }

        private ImgInfoForSegEntity ProcessOneImage(Bitmap img, EnumResultImgType resulttype, 
            string dstimgfolder, string imgLocalPath, ImageFormat dstFormat, Rectangle rectIn, bool useInputRect = false)
        {
            string dstImgPath = Path.Combine(dstimgfolder,imgLocalPath);
            string imgid = Path.GetFileNameWithoutExtension(imgLocalPath);
            bool segSucceed = true;
            System.Drawing.Rectangle rect = System.Drawing.Rectangle.Empty;
            if (!useInputRect)
            {
                if (!CropImageWithOpenCVCppdll(img, out rect))
                {
                    img.Dispose();
                    segSucceed = false;
                }
            }
            else
            {
                rect = rectIn;
            }
            if (segSucceed)
            {
                Bitmap dstimg = null;
                if (resulttype == EnumResultImgType.CroppedImg)
                {
                    dstimg = new Bitmap(rect.Width, rect.Height, img.PixelFormat);
                    using (var g = Graphics.FromImage(dstimg))
                    {
                        g.DrawImage(img, new System.Drawing.Rectangle(0, 0, rect.Width, rect.Height),
                            new System.Drawing.Rectangle(rect.Left, rect.Top, rect.Width, rect.Height),
                            GraphicsUnit.Pixel);
                        g.Dispose();
                    }
                    dstimg.Save(dstImgPath, dstFormat);
                    dstimg.Dispose();
                }
                if (resulttype == EnumResultImgType.OrigImgWithCropRect)
                {
                    dstimg = img.Clone(new Rectangle(0, 0, img.Width, img.Height), img.PixelFormat);
                    using (var g = Graphics.FromImage(dstimg))
                    {
                        g.DrawRectangle(new System.Drawing.Pen(System.Drawing.Color.Yellow, 8), rect);
                        g.Dispose();
                    }
                    dstimg.Save(dstImgPath, dstFormat);
                    dstimg.Dispose();
                }
                if (resulttype == EnumResultImgType.BothImgWithCropRectAndCroppedImg)
                {
                    Bitmap dstCroppedImg = new Bitmap(rect.Width, rect.Height, img.PixelFormat);
                    Bitmap dstCropImgWithCropRect = img.Clone(new Rectangle(0, 0, img.Width, img.Height), img.PixelFormat);
                    using (var g = Graphics.FromImage(dstCroppedImg))
                    {
                        g.DrawImage(img, new System.Drawing.Rectangle(0, 0, rect.Width, rect.Height),
                            new System.Drawing.Rectangle(rect.Left, rect.Top, rect.Width, rect.Height),
                            GraphicsUnit.Pixel);
                        g.Dispose();
                    }
                    using (var g = Graphics.FromImage(dstCropImgWithCropRect))
                    {
                        g.DrawRectangle(new System.Drawing.Pen(System.Drawing.Color.Yellow, 8), rect);
                        g.Dispose();
                    }
                    string croppedImgFolder = Path.Combine(dstimgfolder, "裁切结果图");
                    string cropRectImgFolder = Path.Combine(dstimgfolder, "带裁切框原图");
                    Directory.CreateDirectory(croppedImgFolder);
                    Directory.CreateDirectory(cropRectImgFolder);
                    dstCroppedImg.Save(Path.Combine(croppedImgFolder, imgLocalPath), dstFormat);
                    dstCroppedImg.Dispose();
                    dstCropImgWithCropRect.Save(Path.Combine(cropRectImgFolder, imgLocalPath), dstFormat);
                    dstCropImgWithCropRect.Dispose();
                }
            }
            var segInfo = new ImgInfoForSegEntity
            {
                ImgId = imgid,
                ImgLocalPath = imgLocalPath,
                SegSucceed = segSucceed,
                Left = rect.Left,
                Right = rect.Right,
                Top = rect.Top,
                Bottom = rect.Bottom,
            };
            return segInfo;
        }

        private void WindowClosing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            _closing = true;
            while (_processing)
            {
                Thread.Sleep(1);
            }
            _closing = false;
        }
    }
}