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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 */
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