Adds "hide UI" keybind.

Man posting screenshots is much nicer when there's no ugly chat window.

Resources/keybinds.yml

@@ -3,6 +3,9 @@ binds:
 - function: ShowDebugMonitors
   key: F3
   type: Toggle
+- function: HideUI
+  key: F4
+  type: Toggle
 - function: MoveUp
   key: W
   type: State

SS14.Client/Input/EngineContexts.cs

@@ -16,6 +16,7 @@ namespace SS14.Client.Input
             var common = contexts.GetContext(InputContextContainer.DefaultContextName);
             common.AddFunction(EngineKeyFunctions.EscapeMenu);
             common.AddFunction(EngineKeyFunctions.FocusChat);
+            common.AddFunction(EngineKeyFunctions.HideUI);
             common.AddFunction(EngineKeyFunctions.ShowDebugMonitors);
             common.AddFunction(EngineKeyFunctions.MoveUp);
             common.AddFunction(EngineKeyFunctions.MoveDown);

SS14.Client/UserInterface/UserInterfaceManager.cs

@@ -49,6 +49,8 @@ namespace SS14.Client.UserInterface
 
         private readonly List<Control> _modalStack = new List<Control>();
 
+        private bool _rendering = true;
+
         public void PostInject()
         {
             _config.RegisterCVar("key.keyboard.console", Keyboard.Key.Tilde, CVar.ARCHIVE);
@@ -69,6 +71,11 @@ namespace SS14.Client.UserInterface
             _inputManager.SetInputCommand(EngineKeyFunctions.ShowDebugMonitors,
                 InputCmdHandler.FromDelegate(enabled: session => { DebugMonitors.Visible = true; },
                     disabled: session => { DebugMonitors.Visible = false; }));
+
+            _inputManager.SetInputCommand(EngineKeyFunctions.HideUI,
+                InputCmdHandler.FromDelegate(
+                    enabled: session => _rendering = false,
+                    disabled: session => _rendering = true));
         }
 
         private void _initializeCommon()
@@ -399,6 +406,10 @@ namespace SS14.Client.UserInterface
 
         public void Render(IRenderHandle renderHandle)
         {
+            if (!_rendering)
+            {
+                return;
+            }
             var drawHandle = renderHandle.CreateHandleScreen();
 
             _render(drawHandle, RootControl, Vector2.Zero, Color.White, null);

SS14.Shared/Input/KeyFunctions.cs

@@ -19,6 +19,7 @@ namespace SS14.Shared.Input
         public static readonly BoundKeyFunction Run = "Run";
 
         public static readonly BoundKeyFunction ShowDebugMonitors = "ShowDebugMonitors";
+        public static readonly BoundKeyFunction HideUI = "HideUI";
         public static readonly BoundKeyFunction EscapeMenu = "ShowEscapeMenu";
         public static readonly BoundKeyFunction FocusChat = "FocusChatWindow";