vaikene.ee Git - evaf/blob - src/libs/Common/eventqueue.h

   1 /**
   2  * @file Common/eventqueue.h
   3  * @brief Event queue interface implementation
   4  * @author Enar Vaikene
   5  *
   6  * Copyright (c) 2011 Enar Vaikene
   7  *
   8  * This file is part of the eVaf C++ cross-platform application development framework.
   9  *
  10  * This file can be used under the terms of the GNU General Public License
  11  * version 3.0 as published by the Free Software Foundation and appearing in
  12  * the file LICENSE included in the packaging of this file. Please review the
  13  * the following information to ensure the GNU General Public License version
  14  * 3.0 requirements will be met: http://www.gnu.org/copyleft/gpl.html.
  15  *
  16  * Alternatively, this file may be used in accordance with the Commercial License
  17  * Agreement provided with the Software.
  18  */
  19
  20 #ifndef __COMMON_EVENTQUEUE_H
  21 #define __COMMON_EVENTQUEUE_H
  22
  23 #include "ieventqueue.h"
  24
  25 #include <QObject>
  26 #include <QString>
  27 #include <QHash>
  28 #include <QVector>
  29
  30
  31 namespace eVaf {
  32 namespace Common {
  33 namespace Internal {
  34
  35 /**
  36  * iEventQueue interface implementation
  37  */
  38 class EventQueue : public iEventQueue
  39 {
  40     Q_OBJECT
  41
  42 public:
  43
  44     EventQueue();
  45
  46     virtual ~EventQueue();
  47
  48     /// Qt event handler
  49     virtual bool event(QEvent * e);
  50
  51     /*
  52         iEventQueue interface
  53     */
  54
  55     virtual uint registerEvent(QString const & name);
  56
  57     virtual uint queryEvent(QString const & name) const;
  58
  59     virtual void unregisterEvent(uint id);
  60
  61     virtual uint subscribeEvent(uint id, QObject * obj);
  62
  63     virtual void unsubscribeEvent(uint id, QObject * obj);
  64
  65     virtual void broadcastEvent(Event * event);
  66
  67
  68 private: // Members
  69
  70     /// ID of the next event
  71     uint mNextEventId;
  72
  73     /// List of registered events
  74     typedef QHash<uint, QString> Events;
  75     Events mEvents;
  76
  77     /// List of subscribers
  78     typedef QHash<uint, QVector<QObject *> > Subscribers;
  79     Subscribers mSubscribers;
  80
  81
  82 private slots:
  83
  84     /// One of the subscribers is destroyed
  85     /// We need to remove it from the list of subscribers.
  86     void subscriberDestroyed(QObject * obj = 0);
  87
  88 };
  89
  90 } // namespace evaf::Common::Internal
  91 } // namespace eVaf::Common
  92 } // namespace eVaf
  93
  94 #endif // eventqueue.h