include/notify.hpp

   1 #ifndef NOTIFY_HPP
   2 #define NOTIFY_HPP
   3
   4 #include <functional>
   5 #include <list>
   6 #include <utility>
   7
   8 typedef std::function<void (void)> Notifier;
   9 typedef std::list<std::pair<int, Notifier> > NotifierList;
  10 typedef NotifierList::iterator NotifierHandle;
  11
  12 class Notifiable
  13 {
  14 public:
  15     void disconnect(NotifierHandle handle) {
  16         this->notifier_list.erase(handle);
  17     }
  18
  19 protected:
  20     NotifierHandle connect(int type, Notifier notifier) {
  21         NotifierList &nl = this->notifier_list;
  22         std::pair<int, Notifier> item(type, notifier);
  23         return nl.insert(nl.end(), item);
  24     }
  25
  26     void notify(int event) {
  27         NotifierList &nl = this->notifier_list;
  28         NotifierList::iterator i;
  29
  30         for (i = nl.begin(); i != nl.end(); ++i) {
  31             if (i->first == event) {
  32                 i->second();
  33             }
  34         }
  35     }
  36
  37 private:
  38     NotifierList notifier_list;
  39 };
  40
  41 #endif