Music volume is controllable from settings menu

#7

1 files changed, 6 insertions, 0 deletions

@@ -20,6 +20,7 @@ struct MenuItem {
   bool playSfx = true;
   int value = 0;
   int maxValue = 0;
+  std::function<void(MenuItem&)> selectionChanged;
 };
 
 class MenuBuilder {
@@ -57,6 +58,11 @@ public:
     return *this;
   }
 
+  MenuBuilder& SelectionChangedFunction(std::function<void(MenuItem&)> val) {
+    result_.selectionChanged = std::move(val);
+    return *this;
+  }
+
   MenuItem Build() const {
     return result_;
   }