add Game Focus indicator to titlebar (#336)

Author: Jamiras

src/Application.cpp

@@ -965,7 +965,8 @@ void Application::updateMenu()
   else if (isGameActive())
   {
     char msg[256];
-    snprintf(msg, sizeof(msg), "%s %s - %s", _core.getSystemInfo()->library_name, _core.getSystemInfo()->library_version, getSystemName(_system));
+    snprintf(msg, sizeof(msg), "%s %s - %s%s", _core.getSystemInfo()->library_name, _core.getSystemInfo()->library_version,
+      getSystemName(_system), _keybinds.hasGameFocus() ? " [Game Focus]" : "");
     RA_UpdateAppTitle(msg);
   }
   else
@@ -2474,6 +2475,10 @@ void Application::handle(const KeyBinds::Action action, unsigned extra)
   case KeyBinds::Action::kKeyboardInput:
     _input.keyboardEvent(static_cast<enum retro_key>(extra >> 8), static_cast<bool>(extra & 0xFF));
     break;
+
+  case KeyBinds::Action::kGameFocusToggle:
+    updateMenu();
+    break;
   }
 }
 

src/KeyBinds.cpp

@@ -382,7 +382,7 @@ KeyBinds::Action KeyBinds::translateButtonPress(int button, unsigned* extra)
     case kScreenshot:        return Action::kScreenshot;
 
     // Game Focus
-    case kGameFocusToggle:   _gameFocus = !_gameFocus; return Action::kNothing;
+    case kGameFocusToggle:   _gameFocus = !_gameFocus; return Action::kGameFocusToggle;
 
     default:                 return Action::kNothing;
   }

src/KeyBinds.h

@@ -86,6 +86,7 @@ class KeyBinds
     kReset,
 
     // Keyboard
+    kGameFocusToggle,
     kKeyboardInput  // (extra = key << 8 | pressed)
   };
 
@@ -125,6 +126,8 @@ class KeyBinds
   std::string serializeBindings() const;
   bool deserializeBindings(const char* json);
 
+  bool hasGameFocus() const noexcept { return _gameFocus; }
+
 protected:
   libretro::LoggerComponent* _logger;