[ADDED] canvas data sending to the server works, but not fully yet to all the clients

Client/Client.cs

@@ -8,13 +8,18 @@ using static SharedClientServer.JSONConvert;
 
 namespace Client
 {
-    public delegate void OnLobbyCreated(int id);
+    public delegate void OnLobbyCreated(int id);
+
+    public delegate void CanvasDataReceived(double[] coordinates);
     class Client : ObservableObject
-    {
+    {
+
+        private ClientData clientData = ClientData.Instance;
+
         private TcpClient tcpClient;
         private NetworkStream stream;
-        private byte[] buffer = new byte[1024];
+        private byte[] buffer = new byte[2048];
-        private byte[] totalBuffer = new byte[1024];
+        private byte[] totalBuffer = new byte[2048];
         private int totalBufferReceived = 0;
         public int Port = 5555;
         public bool Connected = false;
@@ -24,6 +29,8 @@ namespace Client
         public Callback OnLobbyJoinSuccess;
         public Callback OnLobbiesReceivedAndWaitingForHost;
         public OnLobbyCreated OnLobbyCreated;
+
+        public CanvasDataReceived CanvasDataReceived;
         public Lobby[] Lobbies { get; set; }
 
         public Client(string username)
@@ -48,7 +55,7 @@ namespace Client
         {
             int amountReceived = stream.EndRead(ar);
 
-            if (totalBufferReceived + amountReceived > 1024)
+            if (totalBufferReceived > 2048)
             {
                 throw new OutOfMemoryException("buffer too small");
             }
@@ -68,6 +75,7 @@ namespace Client
                 handleData(message);
 
                 totalBufferReceived -= expectedMessageLength;
+                Debug.WriteLine($"reduced buffer: {expectedMessageLength}");
                 expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
             }
 
@@ -124,6 +132,8 @@ namespace Client
 
                 case JSONConvert.CANVAS:
                     // canvas data
+                    //clientData.CanvasData = JSONConvert.getCoordinates(payload);                   
+                    CanvasDataReceived?.Invoke(JSONConvert.getCoordinates(payload));
                     break;
 
                 default:

Client/ClientData.cs

@@ -31,6 +31,7 @@ namespace Client
         private Client _client;
         private Lobby _lobby;
         private string _message;
+        private double[] _canvasData = new double[4];
 
         private ClientData()
         {
@@ -68,5 +69,11 @@ namespace Client
             }
         }
 
+        public double[] CanvasData
+        {
+            get { return _canvasData; }
+            set { _canvasData = value; }
+        }
+
     }
 }

Client/ViewModels/ViewModelGame.cs

@@ -14,6 +14,7 @@ namespace Client.ViewModels
     class ViewModelGame : INotifyPropertyChanged
     {
         private ClientData data = ClientData.Instance;
+        private GameWindow window;
 
         public event PropertyChangedEventHandler PropertyChanged;
 
@@ -68,7 +69,7 @@ namespace Client.ViewModels
                 currentPoint = e.GetPosition(window.CanvasForPaint);
 
                 window.CanvasForPaint.Children.Add(line);
-                data.Client.SendMessage(JSONConvert.GetMessageToSend(0x04, coordinates));
+                data.Client.SendMessage(JSONConvert.ConstructCanvasDataSend(coordinates));
             }
         }
 
@@ -83,8 +84,9 @@ namespace Client.ViewModels
         }
         
 
-        public ViewModelGame()
+        public ViewModelGame(GameWindow window)
         {
+            this.window = window;
             if (_payload == null)
             {
                 _message = "";
@@ -97,6 +99,24 @@ namespace Client.ViewModels
                 //Messages.Add($"{data.User.Username}: {Message}");
             }
             OnKeyDown = new RelayCommand(ChatBox_KeyDown);
+            data.Client.CanvasDataReceived = UpdateCanvasWithNewData;
+        }
+
+
+        private void UpdateCanvasWithNewData(double[] coordinates)
+        {
+            Application.Current.Dispatcher.Invoke(delegate
+            {
+                Line line = new Line();
+                line.Stroke = new SolidColorBrush(Colors.Black);
+                line.X1 = coordinates[0];
+                line.Y1 = coordinates[1];
+                line.X2 = coordinates[2];
+                line.Y2 = coordinates[3];
+
+                this.window.CanvasForPaint.Children.Add(line);
+            });
+            
         }
 
         private void ChatBox_KeyDown()

Client/Views/GameWindow.xaml.cs

@@ -22,7 +22,7 @@ namespace Client.Views
         private ViewModelGame viewModel;
         public GameWindow()
         {
-            this.viewModel = new ViewModelGame();
+            this.viewModel = new ViewModelGame(this);
             DataContext = this.viewModel;
             InitializeComponent();
             

Server/Models/ServerClient.cs

@@ -16,8 +16,8 @@ namespace Server.Models
     {
         private TcpClient tcpClient;
         private NetworkStream stream;
-        private byte[] buffer = new byte[1024];
+        private byte[] buffer = new byte[2048];
-        private byte[] totalBuffer = new byte[1024];
+        private byte[] totalBuffer = new byte[2048];
         private int totalBufferReceived = 0;
         public User User { get; set; }
         private ServerCommunication serverCom = ServerCommunication.INSTANCE;
@@ -48,7 +48,7 @@ namespace Server.Models
 
             int bytesReceived = this.stream.EndRead(ar);
 
-            if (totalBufferReceived + bytesReceived > 1024)
+            if (totalBufferReceived > 2048)
             {
                 throw new OutOfMemoryException("buffer is too small!");
             }
@@ -136,6 +136,11 @@ namespace Server.Models
                     break;
                 case JSONConvert.CANVAS:
                     Debug.WriteLine("GOT A MESSAGE FROM THE CLIENT ABOUT THE CANVAS!!!");
+                    dynamic canvasData = new {
+                        coordinatesLine = JSONConvert.getCoordinates(payload)
+                    };
+                    serverCom.SendToLobby(serverCom.GetLobbyForUser(User), JSONConvert.GetMessageToSend(CANVAS, canvasData));
+
                     // canvas data
                     // todo send canvas data to all other serverclients in lobby
                     break;

SharedClientServer/ClientServerUtil.cs

@@ -7,6 +7,8 @@ using System.Text;
 namespace SharedClientServer
 {
     public delegate void Callback();
+
+
     class ClientServerUtil
     {
         // creates a message array to send to the server or to clients

SharedClientServer/JSONConvert.cs

@@ -83,6 +83,7 @@ namespace SharedClientServer
             });
         }
 
+
         public static byte[] ConstructLobbyJoinMessage(int lobbyID)
         {
             return GetMessageToSend(LOBBY, new
@@ -140,6 +141,24 @@ namespace SharedClientServer
 
         #endregion
 
+        public static byte[] ConstructCanvasDataSend(double[] coordinates)
+        {
+            return GetMessageToSend(CANVAS, new
+            {
+                coordinatesLine = coordinates
+            }); ;
+        }
+
+        public static double[] getCoordinates(byte[] payload)
+        {
+            dynamic payloadD = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(payload));
+            JArray coordinatesArray = payloadD.coordinatesLine;
+
+            double[] coordinates = coordinatesArray.ToObject<double[]>();
+
+            return coordinates;
+        }
+
         /// <summary>
         /// constructs a message that can be sent to the clients or server
         /// </summary>