using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Drawing;
using System.Drawing.Imaging;
using System.Diagnostics;
using System.Security.Cryptography;

namespace Capture
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private OptionContext _options;

        public MainWindow()
        {
            InitializeComponent();
            InitInstance();
        }

        private void InitInstance()
        {
            _options = this.DataContext as OptionContext;
        }

        private void CaptureScreen()
        {
            int width = (int)this.Width - _options.FrameThickness * 2;
            int height = (int)this.Height - _options.FrameThickness * 2 - _options.ButtonHeight;
            int left = (int)this.Left + _options.FrameThickness;
            int top = (int)this.Top + _options.FrameThickness;

            string path = @"C:\Temp\test.bmp";
            using (Bitmap bitmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
            {
                using (Graphics gr = Graphics.FromImage(bitmap))
                {
                    gr.CopyFromScreen(left, top, 0, 0, bitmap.Size);
                }

                bitmap.Save(path, ImageFormat.Png);
            }

            OpenFile(path);
        }

        private void OpenFile(string path)
        {
            Process pr = new Process();
            pr.StartInfo = new ProcessStartInfo(path)
            {
                UseShellExecute = true
            };
            pr.Start();
        }

        private void btnCapture_Click(object sender, RoutedEventArgs e)
        {
            CaptureScreen();
        }

        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.ChangedButton != MouseButton.Left)
                return;

            this.DragMove();
        }
    }
}