Sunset old state system finally.

src/dawn/state/StateOwner.hpp

@@ -8,42 +8,9 @@
 #include "StateProperty.hpp"
 
 namespace Dawn {
-  template<typename ...A>
-  class StateOwnerEventLegacy : public IStateOwnerEventLegacy {
-    public:
-      IStateOwner *owner;
-      Event<A...> *event;
-      std::function<void(A...)> fn;
-
-      /**
-       * Function used to simply remove the event listener from the legacy
-       * event, does not deal with the state owner. 
-       */
-      void removeListener() override {
-        event->removeListener(this, &StateOwnerEventLegacy::callback);
-      }
-
-      /**
-       * Function that can be used to tear down this legacy event.
-       */
-      void teardown() override {
-        this->removeListener();
-        owner->_stateLegacyEventDisposed(this);
-      }
-
-      /**
-       * Callbaack method that is invoked by the legacy event.
-       * @param args Arguments received by legacy event.
-       */
-      void callback(A... args) {
-        this->fn(args...);
-      }
-  };
-
   class StateOwner : public IStateOwner {
     private:
       std::vector<IStateEvent*> eventsSubscribed;
-      std::vector<IStateOwnerEventLegacy*> eventLegacyBridge;
 
     protected:
       /**
@@ -62,17 +29,9 @@ namespace Dawn {
           (*it)->_stateOwnerDestroyed(this);
           ++it;
         }
-
-        auto itBridge = this->eventLegacyBridge.begin();
-        while(itBridge != this->eventLegacyBridge.end()) {
-          (*itBridge)->removeListener();
-          delete *itBridge;
-          ++itBridge;
-        }
-
+        
         this->_stateProviderListeners.clear();
         this->eventsSubscribed.clear();
-        this->eventLegacyBridge.clear();
       }
   
     public:
@@ -95,24 +54,6 @@ namespace Dawn {
         }
       }
 
-      /**
-       * Called by legacy events when they are being disposed in a way that was
-       * not called by this state owner disposing.
-       * 
-       * @param evt Event that is being disposed.
-       */
-      void _stateLegacyEventDisposed(IStateOwnerEventLegacy *evt) override {
-        auto it = this->eventLegacyBridge.begin();
-        while(it != this->eventLegacyBridge.end()) {
-          if(*it == evt) {
-            this->eventLegacyBridge.erase(it);
-            break;
-          } else {
-            ++it;
-          }
-        }
-      }
-
       /**
        * Listen for changes to a state property and invoke the provided func
        * when the value is changed.
@@ -230,38 +171,6 @@ namespace Dawn {
 
         return listener.unsub;
       }
-    
-      /**
-       * Listen for callback of a legacy styled event. This will be removed in
-       * the future in favour of everything using State Events. This uses a lot
-       * more memory than the new state event listener.
-       * 
-       * @deprecated In favour of StateEvent<>
-       * @tparam F The type of the callback function.
-       * @tparam A Argument types for the event.
-       * @param fn Callback function to be invoked when the event is triggered.
-       * @param event Event that will be listened to.
-       * @return A method that, when invoked, will unsubscribe from the event.
-       */
-      template<typename F, typename... A>
-      std::function<void()> useEventLegacy(
-        F fn,
-        Event<A...> &event
-      ) {
-        // This is a legacy feature to make upgrading to the new useEffect a bit
-        // easier for me. For the time being I am just bodging this together to
-        // do what I need here.
-        auto bridge = new StateOwnerEventLegacy<A...>();
-        bridge->owner = this;
-        bridge->event = &event;
-        bridge->fn = fn;
-        event.addListener(bridge, &StateOwnerEventLegacy<A...>::callback);
-        eventLegacyBridge.push_back(bridge);
-
-        return std::bind([&](IStateOwnerEventLegacy *evt){
-          evt->teardown();
-        }, bridge);
-      }
 
       /**
        * State Owner teardown function. Mostly just used to remove any lingering