Lots of UI Component Updates

src/dawn/scene/SceneItemComponent.hpp

@@ -16,6 +16,7 @@ namespace Dawn {
     public:
       SceneItem &item;
       Transform &transform;
+      bool_t hasInitialized = false;
 
       /**
        * Constructs a new SceneItemComponent. Components are attached to
@@ -28,9 +29,17 @@ namespace Dawn {
       
       /**
        * Requested on the first frame that the parent scene item has become
-       * active.
+       * active, after all of my dependencies are ready.
        */
-      virtual void start() = 0;
+      void init();
+      
+      /**
+       * Optionally return all dependencies for this component to wait for init
+       * for before the component will be initialized.
+       * 
+       * @return Array of dependencies.
+       */
+      virtual std::vector<SceneItemComponent*> getDependencies();
 
       /**
        * Shorthand to return the scene that this component's item belongs to.
@@ -44,6 +53,11 @@ namespace Dawn {
        */
       DawnGame & getGame();
 
+      /**
+       * Same as init, but intended for your subclass to override.
+       */
+      virtual void onStart();
+
       /**
        * Cleanup the SceneItemComponent.
        */