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