[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[] totalBuffer = new byte[1024];
+        private byte[] buffer = new byte[2048];
+        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();