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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* Additional copyright for this file:
* Copyright (C) 1995-1997 Presto Studios, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef PEGASUS_NOTIFICATION_H
#define PEGASUS_NOTIFICATION_H
#include "common/array.h"
#include "common/list.h"
#include "pegasus/types.h"
#include "pegasus/util.h"
namespace Pegasus {
class NotificationManager;
class NotificationReceiver;
struct ReceiverEntry {
NotificationReceiver *receiver;
NotificationFlags mask;
};
int operator==(const ReceiverEntry &entry1, const ReceiverEntry &entry2);
int operator!=(const ReceiverEntry &entry1, const ReceiverEntry &entry2);
typedef Common::Array<ReceiverEntry> ReceiverList;
/*
A notification can have 32 flags associated with it, which can be user-defined.
*/
class Notification : public IDObject {
friend class NotificationManager;
public:
Notification(const NotificationID id, NotificationManager *owner);
virtual ~Notification();
// notifyMe will have this receiver notified when any of the specified notification
// flags are set.
// If there is already a notification set for this receiver, notifyMe does a bitwise
// OR with the receiver's current notification flags.
// Can selectively set or clear notification bits by using the flags and mask argument.
void notifyMe(NotificationReceiver*, NotificationFlags flags, NotificationFlags mask);
void cancelNotification(NotificationReceiver *receiver);
void setNotificationFlags(NotificationFlags flags, NotificationFlags mask);
NotificationFlags getNotificationFlags() { return _currentFlags; }
void clearNotificationFlags() { setNotificationFlags(0, ~(NotificationFlags)0); }
protected:
void checkReceivers();
NotificationManager *_owner;
ReceiverList _receivers;
NotificationFlags _currentFlags;
};
class NotificationReceiver {
friend class Notification;
public:
NotificationReceiver();
virtual ~NotificationReceiver();
protected:
// receiveNotification is called automatically whenever a notification that this
// receiver depends on has its flags set
virtual void receiveNotification(Notification *, const NotificationFlags);
virtual void newNotification(Notification *notification);
private:
Notification *_notification;
};
typedef Common::List<Notification *> NotificationList;
class NotificationManager : public NotificationReceiver {
friend class Notification;
public:
NotificationManager();
virtual ~NotificationManager();
void checkNotifications();
protected:
void addNotification(Notification *notification);
void removeNotification(Notification *notification);
void detachNotifications();
NotificationList _notifications;
};
} // End of namespace Pegasus
#endif
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