using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

using System.Drawing.Imaging;

using System.Threading;



namespace WindowsTest

{

    public partial class entry : Form

    {

        private static Object lockObj = new object();



        public entry()

        {

            InitializeComponent();

        }

        #region 按钮事件

        /// <summary>

        /// 退出应用程序

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void buttonExit_Click(object sender, EventArgs e)

        {

            Application.Exit();//退出应用程序

        }

        /// <summary>

        /// 选择原路径

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void buttonSearchOld_Click(object sender, EventArgs e)

        {

            this.folderBrowserDialogOldPatch.ShowNewFolderButton = true;

            this.folderBrowserDialogOldPatch.ShowDialog();

            this.textBoxOldPath.Text = this.folderBrowserDialogOldPatch.SelectedPath;

        }

        /// <summary>

        /// 选择新路径

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void buttonSearchNew_Click(object sender, EventArgs e)

        {

            this.folderBrowserDialogOldPatch.ShowNewFolderButton = true;

            this.folderBrowserDialogNewPath.ShowDialog();

            this.textBoxNewPath.Text = this.folderBrowserDialogNewPath.SelectedPath;

        }

        /// <summary>

        /// 开始监控原文件夹

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void buttonAutoWatcher_Click(object sender, EventArgs e)

        {

            if (this.textBoxNewPath.Text.Trim() == string.Empty)

            {

                MessageBox.Show("请选择目标路径", "错误：目标路径为空", MessageBoxButtons.OK, MessageBoxIcon.Error);

                return;

            }

            if (this.textBoxOldPath.Text.Trim() == string.Empty)

            {

                MessageBox.Show("请选择原路径", "错误：原路径为空", MessageBoxButtons.OK, MessageBoxIcon.Error);

                return;

            }

            if (this.buttonAutoWatcher.Text == "自动")

            {

                this.buttonAutoWatcher.Text = "停止";

                this.SetEnable(false);

                this.StartWatcher();

            }

            else

            {

                this.buttonAutoWatcher.Text = "自动";

                this.SetEnable(true);

            }

        }

        #endregion



        #region 自定义方法

        /// <summary>

        /// 设定按钮的是否可用

        /// </summary>

        /// <param name="s">是否可用</param>

        private void SetEnable(bool s)

        {

            this.buttonSearchNew.Enabled = s;

            this.buttonSearchOld.Enabled = s;

            this.textBoxNewPath.Enabled = s;

            this.textBoxOldPath.Enabled = s;

            this.checkBoxIncludeSub.Enabled = s;

        }

        private void StartWatcher()

        {

            fw.BeginInit();

            fw.IncludeSubdirectories = this.checkBoxIncludeSub.Checked;//是否包含子文件夹

            fw.Path = this.textBoxOldPath.Text;

            fw.Changed += new System.IO.FileSystemEventHandler(OnChanged);

            fw.Created += new System.IO.FileSystemEventHandler(OnCreated);

            fw.Renamed += new System.IO.RenamedEventHandler(OnRenamed);

            fw.Deleted += new System.IO.FileSystemEventHandler(OnDeleted);

            fw.EnableRaisingEvents = true;

            fw.EndInit();

        }



        void OnDeleted(object sender, System.IO.FileSystemEventArgs e)

        {

        }



        void OnRenamed(object sender, System.IO.RenamedEventArgs e)

        {

        }



        void OnCreated(object sender, System.IO.FileSystemEventArgs e)

        {

            string NewPath = e.FullPath;

            NewPath = NewPath.Replace(this.textBoxOldPath.Text.Trim(), this.textBoxNewPath.Text);

            this.CreateFile(e.FullPath, NewPath);

        }



        void OnChanged(object sender, System.IO.FileSystemEventArgs e)

        {

        }



        /// <summary>

        /// 生成新的文件

        /// </summary>

        /// <param name="ol">原图片路径</param>

        /// <param name="ne">新图片路径</param>

        /// <returns></returns>

        private void CreateFile(string ol, string ne)

        {

            if (File.Exists(ol))

            {

                if (!Directory.Exists(ne.Substring(0, ne.LastIndexOf('\\'))))

                {

                    Directory.CreateDirectory(ne.Substring(0, ne.LastIndexOf('\\')));

                }

                string exFileName= ol.Substring(ol.LastIndexOf('.')).ToLower();

                if (exFileName == ".jpg" || exFileName == ".gif" || exFileName == ".bmp"||exFileName==".jpeg"||exFileName==".png")

                {

                    this.ShowThumbnail(ol, ne,Convert.ToInt32(numericUpDownHeight.Value),Convert.ToInt32(numericUpDownWidth.Value));

                }

            }

        }

        public void ShowThumbnail(string oldfile, string newfile, int h, int w)

        {

            lock (lockObj)

            {            System.Drawing.Image img = System.Drawing.Image.FromFile(oldfile);

            System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);



            int oldh = img.Height;

            int oldw = img.Width;



            int newh, neww;



            double h1 = oldh * 1.0 / h;

            double w1 = oldw * 1.0 / w;



            double f = (h1 > w1) ? h1 : w1;



            if (f < 1.0)

            {

                newh = oldh;

                neww = oldw;

            }

            else

            {

                newh = (int)(oldh / f);

                neww = (int)(oldw / f);

            }



            System.Drawing.Image myThumbnail = img.GetThumbnailImage(neww, newh, myCallback, IntPtr.Zero);

            string exFileName = oldfile.Substring(oldfile.LastIndexOf('.')+1).ToLower();

            switch (exFileName)

            {

                case "jpg":

                    myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                    break;

                case "bmp":

                    myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Bmp);

                    break;

                case "jpeg":

                    myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                    break;

                case "gif":

                    myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Gif);

                    break;

                case "png":

                    myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Png);

                    break;

                default:

                    myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                    break;

            }

            

            img.Dispose();

            myThumbnail.Dispose();

           }

        }

        private static bool ThumbnailCallback()

        {

            return false;

        }   



        #endregion

    }

}

/// <summary>

        /// 生成缩略图

        /// </summary>

        /// <param name="oldfile">原文件完整路径</param>

        /// <param name="newfile">目标文件完整路径</param>

        /// <param name="h">缩放后的最大高度</param>

        /// <param name="w">缩放后的最大宽度</param>

        /// <returns></returns>

        public bool ShowThumbnail(string oldfile, string newfile, int h, int w)

        {

            lock (lockObj)

            {

                FileStream fss = new FileStream(oldfile, FileMode.Open);

                System.Drawing.Image img = System.Drawing.Image.FromStream(fss);

                System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);



                #region 计算高度，宽度

                int oldh = img.Height;

                int oldw = img.Width;



                int newh, neww;



                double h1 = oldh * 1.0 / h;

                double w1 = oldw * 1.0 / w;



                double f = (h1 > w1) ? h1 : w1;



                if (f < 1.0)

                {

                    newh = oldh;

                    neww = oldw;

                }

                else

                {

                    newh = (int)(oldh / f);

                    neww = (int)(oldw / f);

                }

                #endregion

                System.Drawing.Image myThumbnail = img.GetThumbnailImage(neww, newh, myCallback, IntPtr.Zero);

                string exFileName = oldfile.Substring(oldfile.LastIndexOf('.') + 1).ToLower();

                switch (exFileName)

                {

                    case "jpg":

                        myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                        break;

                    case "bmp":

                        myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Bmp);

                        break;

                    case "jpeg":

                        myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                        break;

                    case "gif":

                        myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Gif);

                        break;

                    case "png":

                        myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Png);

                        break;

                    default:

                        myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                        break;

                }

                fss.Close();

                fss.Dispose();

                img.Dispose();

                myThumbnail.Dispose();

                return true;

            }

        }

        private static bool ThumbnailCallback()

        {

            return false;

        }