Angel 3.2
A 2D Game Prototyping Engine
Switchboard.h
1 
2 // Copyright (C) 2008-2013, Shane Liesegang
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29 
30 #pragma once
31 
32 #include "../Messaging/Message.h"
33 #include "../Util/MathUtil.h"
34 
35 #include <queue>
36 
37 //Singleton shortcut
38 #define theSwitchboard Switchboard::GetInstance()
39 
41 
56 {
57 public:
64  static Switchboard& GetInstance();
65 
74  void Broadcast(Message* message);
75 
85  void DeferredBroadcast(Message* message, float delay);
86 
95  void Update(float dt);
96 
109  const bool SubscribeTo(MessageListener* subscriber, const String& messageType);
110 
128  const bool UnsubscribeFrom(MessageListener* subscriber, const String& messageType);
129 
137  const std::set<MessageListener*> GetSubscribersTo(const String& messageName);
138 
145  const StringSet GetSubscriptionsFor(MessageListener* subscriber);
146 
152  void SendAllMessages();
153 
154 protected:
155  Switchboard();
156  static Switchboard* s_Switchboard;
157 
158 private:
159  std::queue<Message*> _messages;
160 
161  std::map< String, std::set<MessageListener*> > _subscribers;
162  std::map< MessageListener*, StringSet > _subscriptions;
163 
164  struct MessageTimer
165  {
166  Message* _message;
167  float _timeRemaining;
168 
169  MessageTimer(Message* message, float timeRemaining)
170  {
171  _message = message;
172  _timeRemaining = MathUtil::Max(0.0f, timeRemaining);
173  }
174  };
175  std::vector<MessageTimer> _delayedMessages;
176 
177  struct SubscriptionInfo
178  {
179  MessageListener* _subscriber;
180  String _messageType;
181 
182  SubscriptionInfo(MessageListener* subscriber, String messageType) :
183  _subscriber(subscriber),
184  _messageType(messageType)
185  {}
186  };
187  bool _messagesLocked;
188  std::vector<SubscriptionInfo> _deferredAdds;
189  std::vector<SubscriptionInfo> _deferredRemoves;
190 };