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- /*
-
- Copyright (C) 2000 Stefan Westerfeld
- stefan@space.twc.de
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-
- */
-
- #ifndef NOTIFICATION_H
- #define NOTIFICATION_H
-
- #include <queue>
- #include "arts_export.h"
-
- namespace Arts {
-
- /*
- * BC - Status (2002-03-08): Notification, NotificationClient,
- * NotificationManager
- *
- * All need to be kept BC, NotificationManager with usual d ptr.
- *
- * Notifications have to be FAST. Currently, they use ID, data & receiver.
- * However, there may be future extensions. For this, one more internal
- * field is provided. Set it to ZERO currently when sending notifications.
- */
-
- struct Notification;
- typedef void (*NotificationDestroyFunction)(const Notification& n);
-
- struct Notification {
- class NotificationClient *receiver;
- int ID;
- void *data;
- void *internal; /* handle with care, equivalent to private d ptr */
-
- void setDestroy(NotificationDestroyFunction destroy);
- };
-
- class ARTS_EXPORT NotificationClient {
- public:
- virtual void notify(const Notification& wm);
- };
-
- class NotificationManagerPrivate;
- class ARTS_EXPORT NotificationManager {
- private:
- NotificationManagerPrivate *d; // unused
- protected:
- std::queue<Notification> todo;
- static NotificationManager *instance;
-
- public:
- NotificationManager();
- ~NotificationManager();
-
- static inline NotificationManager *the()
- {
- return instance;
- }
- void send(Notification wm);
- inline bool pending()
- {
- return !todo.empty();
- }
- bool run();
- void removeClient(NotificationClient *client);
-
- };
-
- }
-
- #endif /* NOTIFICATION_H */
-