using DevExpress.XtraEditors;
using HL_FristAidPlatform_Public;
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;

namespace HL_FristAidPlatform_MultiSystemPublic
{
    public partial class Form_ImageShow : XtraForm
    {
        #region 变量
        /// <summary>
        /// 需要显示的图片源
        /// </summary>
        private byte[] Cur_Image = null;

        /// <summary>
        /// 当前图片
        /// </summary>
        private Image image;

        /// <summary>
        /// 图片原始宽
        /// </summary>
        private int image_Width;

        /// <summary>
        /// 图片原始高
        /// </summary>
        private int image_Height;

        /// <summary>
        /// 是否鼠标移动
        /// </summary>
        private bool isMouseDown = false;

        /// <summary>
        /// 绘制
        /// </summary>
        System.Drawing.Point p1 = new System.Drawing.Point();

        /// <summary>
        /// 绘制
        /// </summary>
        System.Drawing.Point p2 = new System.Drawing.Point();

        /// <summary>
        /// 是否需要居中显示
        /// </summary>
        private bool IsShowInCenter = true;
        #endregion

        /// <summary>
        /// 查看图片
        /// </summary>
        /// <param name="_image">图片源</param>
        public Form_ImageShow(byte[] _image)
        {
            InitializeComponent();
            Cur_Image = _image;
        }

        /// <summary>
        /// 窗体加载
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form_ServiceImageShow_Load(object sender, EventArgs e)
        {
            //注册鼠标滚动事件
            this.MouseWheel += Form_MouseWheel;

            //显示图片
            ShowImage(Cur_Image);
        }

        /// <summary>
        /// 鼠标滚动事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form_MouseWheel(object sender, MouseEventArgs e)
        {
            if (e.Delta > 0) //放大图片bai
            {
                pictureBox.Size = new Size(pictureBox.Width + 50, pictureBox.Height + 50);
            }
            else
            {
                int Width = pictureBox.Width - 50;
                int Height = pictureBox.Height - 50;

                //不能小于10
                if (Width <= 10)
                {
                    Width = 10;
                }
                if (Height <= 10)
                {
                    Height = 10;
                }

                //缩小图片
                pictureBox.Size = new Size(Width, Height);
            }

            if (IsShowInCenter)
            {
                //设置图片在窗体居中
                pictureBox.Location = new Point((this.Width - pictureBox.Width) / 2, (this.Height - pictureBox.Height) / 2);
            }
        }

        /// <summary>
        /// 展示图片
        /// </summary>
        /// <param name="_image">图片源</param>
        private void ShowImage(byte[] _image)
        {
            if (Cur_Image != null)
            {
                try
                {
                    MemoryStream ms = new MemoryStream(_image);
                    image = Image.FromStream(ms);
                    pictureBox.Image = image;

                    //图片原始值
                    image_Width = image.Width;
                    image_Height = image.Height;
                    //double length = (double)_image.Length / (1024 * 1024);
                    //double length2 = (double)_image.Length / 1024 / 1024;
                    //首次显示时显示图片大小
                    pictureBox.Size = new Size(image_Width, image_Height);
                    //设置图片在窗体居中
                    //pictureBox.Location = new Point((this.Width - pictureBox.Width) / 2, (this.Height - pictureBox.Height) / 2);
                }
                catch (Exception ex)
                {
                    PublicClass.WriteErrorLog(this.Text, "展示图片：\r\n" + ex);
                }
            }
            else
            {
                XtraMessageBox.Show("没有需要显示的图片！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        /// <summary>
        /// 保存文件到本地电脑
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_Save_Click(object sender, EventArgs e)
        {
            try
            {
                //double length = (double)Cur_Image.Length / (1024 * 1024);
                SaveFileDialog saveFileDialog = new SaveFileDialog();
                saveFileDialog.Filter = "Image Files(*.JPG;*.PNG;*.jpeg;*.GIF;*.BMP)|*.JPG;*.PNG;*.GIF;*.BMP;*.jpeg|All files(*.*)|*.*";
                saveFileDialog.RestoreDirectory = true;
                saveFileDialog.Title = "保存";
                if (saveFileDialog.ShowDialog() == DialogResult.OK)
                {
                    FileStream fs = (FileStream)saveFileDialog.OpenFile();
                    pictureBox.Image.Save(fs, ImageFormat.Bmp);
                }
            }
            catch (Exception ex)
            {
                PublicClass.WriteErrorLog(this.Text, "保存心电图至电脑：\r\n" + ex);
            }
        }

        /// <summary>
        /// 旋转90°
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_Revolve_Click(object sender, EventArgs e)
        {
            image.RotateFlip(RotateFlipType.Rotate90FlipXY);
            pictureBox.Image = image;
        }

        /// <summary>
        /// 恢复原图
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_Refresh_Click(object sender, EventArgs e)
        {
            pictureBox.Size = new Size(image_Width, image_Height);

            //double length = (double)Cur_Image.Length / (1024 * 1024);
            IsShowInCenter = true;
            //设置图片在窗体居中
            pictureBox.Location = new Point((this.Width - pictureBox.Width) / 2, (this.Height - pictureBox.Height) / 2);
        }

        /// <summary>
        /// 鼠标移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void pictureBox_MouseDown(object sender, MouseEventArgs e)
        {
            IsShowInCenter = false;
            isMouseDown = true;
            p1 = PointToClient(Control.MousePosition);//记录鼠标坐标
            p2 = pictureBox.Location;
        }

        /// <summary>
        /// 鼠标移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void pictureBox_MouseUp(object sender, MouseEventArgs e)
        {
            IsShowInCenter = false;
            isMouseDown = false;
        }

        /// <summary>
        /// 鼠标移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void pictureBox_MouseMove(object sender, MouseEventArgs e)
        {
            //图片坐标计算&赋值
            if (isMouseDown)
            {
                int a = PointToClient(Control.MousePosition).X - p1.X;
                int b = PointToClient(Control.MousePosition).Y - p1.Y;
                IsShowInCenter = false;
                //图片新的坐标 = 图片起始坐标 + 鼠标相对位移}
                pictureBox.Location = new System.Drawing.Point(p2.X + a, p2.Y + b);
            }
        }
    }
}