CD_Laola_Welle/LaOlaWelle/MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
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.Runtime.InteropServices;



namespace LaOlaWelle
{
   /// <summary>
   /// Interaktionslogik für MainWindow.xaml
   /// </summary>
   public partial class MainWindow : Window
   {
      public int ApplicationID;

      [DllImport("winmm.dll")]
      static extern Int32 mciSendString(string Befehl, string buffer, int bufferSize, IntPtr hwndCallback);

      ServerGUI server;
      bool serverActive = false;

      public MainWindow()
      {
         InitializeComponent();

         System.Windows.Forms.NotifyIcon Icon = new System.Windows.Forms.NotifyIcon();
         Icon.BalloonTipText = "Activated";

         Bitmap bmp = new Bitmap(1, 1);
         bmp.SetPixel(0, 0, System.Drawing.Color.AliceBlue);

         Icon.Icon = System.Drawing.Icon.ExtractAssociatedIcon(System.Reflection.Assembly.GetEntryAssembly().ManifestModule.Name);
         Icon.ShowBalloonTip(int.MaxValue);
         Icon.Visible = true;
         Icon.Click += Icon_Click;
         Icon.DoubleClick += Icon_DoubleClick;
      }

      private void Icon_DoubleClick(object sender, EventArgs e)
      {
         Application.Current.Shutdown();
      }

      private async void button_Click(object sender, RoutedEventArgs e)
      {
         if (Equals(clientNumber.Text, "0"))
         {
            server = new ServerGUI();
            server.Owner = this;
            server.Show();
            serverActive = true;
            this.Hide();
            return;
         }

         try {
            ApplicationID = int.Parse(clientNumber.Text);
            teach.IsEnabled = false;

            UdpClient client = new UdpClient();
            IPEndPoint localEp = new IPEndPoint(IPAddress.Any, 2222);
            client.Client.Bind(localEp);

            IPAddress multicastaddress = IPAddress.Parse("239.0.0.222");
            client.JoinMulticastGroup(multicastaddress);
            await Task.Run(() =>
            {
               while (true)
               {
                  var data = client.Receive(ref localEp);
                  using (var stream = new MemoryStream(data))
                  {
                     stream.Position = 0;
                     using (var reader = new BinaryReader(stream))
                     {
                        var message = new Message();
                        if (!Equals(reader.ReadString(), message.Valid))
                        {
                           return;
                        }
                        if (reader.ReadInt32() == ApplicationID) {
                           OpenCloseCD((state)reader.ReadInt32());
                        }
                     }
                  }
               }
            });
         } catch (Exception) {
            MessageBox.Show("Eingabe ungültig");
            return;
         }
      }

      private void OpenCloseCD(state state)
      {
         if(state == state.open)
         {
            mciSendString("set CDAudio door open", null, 127, (IntPtr)0);
         } else
         {
            mciSendString("set CDAudio door closed", null, 127, (IntPtr)0);
         }
      }

      private void Icon_Click(object sender, EventArgs e)
      {

         if (serverActive)
         {
            if (!server.IsVisible)
            {
               server.Show();
            }

            if (server.WindowState == WindowState.Minimized)
            {
               server.WindowState = WindowState.Normal;
            }

            server.Activate();
            server.Topmost = true;
            server.Topmost = false;
            server.Focus();
            return;
         }

         if (!this.IsVisible)
         {
            this.Show();
         }

         if(this.WindowState == WindowState.Minimized)
         {
            this.WindowState = WindowState.Normal;
         }

         this.Activate();
         this.Topmost = true;
         this.Topmost = false;
         this.Focus();
      }
   }
}