Add online player list to lobby UI.

Content.Client/GameTicking/ClientGameTicker.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using Content.Client.Chat;
 using Content.Client.Interfaces;
 using Content.Client.Interfaces.Chat;
@@ -11,6 +12,7 @@ using Robust.Client.Interfaces;
 using Robust.Client.Interfaces.Input;
 using Robust.Client.Interfaces.ResourceManagement;
 using Robust.Client.Interfaces.UserInterface;
+using Robust.Client.Player;
 using Robust.Client.UserInterface;
 using Robust.Shared.Input;
 using Robust.Shared.Interfaces.Network;
@@ -32,6 +34,7 @@ namespace Content.Client.GameTicking
         [Dependency] private IClientConsole _console;
         [Dependency] private ILocalizationManager _localization;
         [Dependency] private IResourceCache _resourceCache;
+        [Dependency] private IPlayerManager _playerManager;
 #pragma warning restore 649
 
         [ViewVariables] private bool _areWeReady;
@@ -51,10 +54,25 @@ namespace Content.Client.GameTicking
             _netManager.RegisterNetMessage<MsgTickerLobbyStatus>(nameof(MsgTickerLobbyStatus), _lobbyStatus);
 
             _baseClient.RunLevelChanged += BaseClientOnRunLevelChanged;
+            _playerManager.PlayerListUpdated += PlayerManagerOnPlayerListUpdated;
 
             _initialized = true;
         }
 
+        private void PlayerManagerOnPlayerListUpdated(object sender, EventArgs e)
+        {
+            if (_lobby == null)
+            {
+                return;
+            }
+
+            _lobby.OnlinePlayerItemList.Clear();
+            foreach (var session in _playerManager.Sessions.OrderBy(s => s.Name))
+            {
+                _lobby.OnlinePlayerItemList.AddItem(session.Name);
+            }
+        }
+
         private void BaseClientOnRunLevelChanged(object sender, RunLevelChangedEventArgs e)
         {
             if (e.NewLevel != ClientRunLevel.Initialize)

Content.Client/UserInterface/LobbyGui.cs

@@ -14,7 +14,8 @@ namespace Content.Client.UserInterface
         public Button ReadyButton { get; }
         public Button ObserveButton { get; }
         public Button LeaveButton { get; }
-        public ChatBox Chat { get; set; }
+        public ChatBox Chat { get; }
+        public ItemList OnlinePlayerItemList { get; }
 
         public LobbyGui(ILocalizationManager localization, IResourceCache resourceCache)
         {
@@ -90,12 +91,24 @@ namespace Content.Client.UserInterface
                 Chat.Input.PlaceHolder = localization.GetString("Talk!");
             }
 
-            // Placeholder.
-            hBox.AddChild(new Placeholder(resourceCache)
             {
-                SizeFlagsHorizontal = SizeFlags.FillExpand,
+                var rightVBox = new VBoxContainer {SizeFlagsHorizontal = SizeFlags.FillExpand};
+                hBox.AddChild(rightVBox);
+                rightVBox.AddChild(new Label
+                {
+                    Text = localization.GetString("Online Players:")
+                });
+                rightVBox.AddChild(OnlinePlayerItemList = new ItemList
+                {
+                    SizeFlagsVertical = SizeFlags.FillExpand,
+                    //SelectMode = ItemList.ItemListSelectMode.None
+                });
+                rightVBox.AddChild(new Placeholder(resourceCache)
+                {
+                    SizeFlagsVertical = SizeFlags.FillExpand,
                     PlaceholderText = localization.GetString("Server Info\nPlaceholder")
                 });
             }
         }
     }
+}

Content.Client/UserInterface/NanoStyle.cs

@@ -149,6 +149,16 @@ namespace Content.Client.UserInterface
             placeholder.SetPatchMargin(StyleBox.Margin.All, 24);
             placeholder.SetExpandMargin(StyleBox.Margin.All, -5);
 
+            var itemListBackgroundSelected = new StyleBoxFlat {BackgroundColor = new Color(75, 75, 86)};
+            itemListBackgroundSelected.SetContentMarginOverride(StyleBox.Margin.Vertical, 2);
+            itemListBackgroundSelected.SetContentMarginOverride(StyleBox.Margin.Horizontal, 4);
+            var itemListItemBackgroundDisabled = new StyleBoxFlat {BackgroundColor = new Color(10, 10, 12)};
+            itemListItemBackgroundDisabled.SetContentMarginOverride(StyleBox.Margin.Vertical, 2);
+            itemListItemBackgroundDisabled.SetContentMarginOverride(StyleBox.Margin.Horizontal, 4);
+            var itemListItemBackground = new StyleBoxFlat {BackgroundColor = new Color(55, 55, 68)};
+            itemListItemBackground.SetContentMarginOverride(StyleBox.Margin.Vertical, 2);
+            itemListItemBackground.SetContentMarginOverride(StyleBox.Margin.Horizontal, 4);
+
             Stylesheet = new Stylesheet(new[]
             {
                 // Default font.
@@ -367,11 +377,11 @@ namespace Content.Client.UserInterface
                     new StyleProperty(ItemList.StylePropertyBackground,
                         new StyleBoxFlat {BackgroundColor = new Color(32, 32, 40)}),
                     new StyleProperty(ItemList.StylePropertyItemBackground,
-                        new StyleBoxFlat {BackgroundColor = new Color(55, 55, 68)}),
+                        itemListItemBackground),
                     new StyleProperty(ItemList.StylePropertyDisabledItemBackground,
-                        new StyleBoxFlat {BackgroundColor = new Color(10, 10, 12)}),
+                        itemListItemBackgroundDisabled),
                     new StyleProperty(ItemList.StylePropertySelectedItemBackground,
-                        new StyleBoxFlat {BackgroundColor = new Color(75, 75, 86)})
+                        itemListBackgroundSelected)
                 }),
 
                 // Tree