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123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* Additional copyright for this file:
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* Copyright (C) 1995-1997 Presto Studios, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef PEGASUS_NOTIFICATION_H
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#define PEGASUS_NOTIFICATION_H
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#include "common/array.h"
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#include "common/list.h"
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#include "pegasus/types.h"
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#include "pegasus/util.h"
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namespace Pegasus {
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class NotificationManager;
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class NotificationReceiver;
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struct ReceiverEntry {
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NotificationReceiver *receiver;
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NotificationFlags mask;
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};
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int operator==(const ReceiverEntry &entry1, const ReceiverEntry &entry2);
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int operator!=(const ReceiverEntry &entry1, const ReceiverEntry &entry2);
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typedef Common::Array<ReceiverEntry> ReceiverList;
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/*
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A notification can have 32 flags associated with it, which can be user-defined.
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*/
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class Notification : public IDObject {
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friend class NotificationManager;
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public:
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Notification(const NotificationID id, NotificationManager *owner);
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virtual ~Notification();
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// notifyMe will have this receiver notified when any of the specified notification
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// flags are set.
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// If there is already a notification set for this receiver, notifyMe does a bitwise
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// OR with the receiver's current notification flags.
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// Can selectively set or clear notification bits by using the flags and mask argument.
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void notifyMe(NotificationReceiver*, NotificationFlags flags, NotificationFlags mask);
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void cancelNotification(NotificationReceiver *receiver);
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void setNotificationFlags(NotificationFlags flags, NotificationFlags mask);
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NotificationFlags getNotificationFlags() { return _currentFlags; }
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void clearNotificationFlags() { setNotificationFlags(0, ~(NotificationFlags)0); }
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protected:
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void checkReceivers();
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NotificationManager *_owner;
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ReceiverList _receivers;
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NotificationFlags _currentFlags;
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};
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class NotificationReceiver {
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friend class Notification;
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public:
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NotificationReceiver();
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virtual ~NotificationReceiver();
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protected:
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// receiveNotification is called automatically whenever a notification that this
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// receiver depends on has its flags set
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virtual void receiveNotification(Notification *, const NotificationFlags);
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virtual void newNotification(Notification *notification);
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private:
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Notification *_notification;
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};
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typedef Common::List<Notification *> NotificationList;
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class NotificationManager : public NotificationReceiver {
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friend class Notification;
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public:
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NotificationManager();
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~NotificationManager() override;
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void checkNotifications();
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protected:
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void addNotification(Notification *notification);
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void removeNotification(Notification *notification);
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void detachNotifications();
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NotificationList _notifications;
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};
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} // End of namespace Pegasus
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#endif
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