/usr/include/soprano/signalcachemodel.h is in libsoprano-dev 2.9.4+dfsg1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /*
* This file is part of Soprano Project.
*
* Copyright (C) 2007 Sebastian Trueg <trueg@kde.org>
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _SOPRANO_SIGNALCACHE_MODEL_H_
#define _SOPRANO_SIGNALCACHE_MODEL_H_
#include "filtermodel.h"
#include "soprano_export.h"
class QTimerEvent;
namespace Soprano {
namespace Util {
/**
* \class SignalCacheModel signalcachemodel.h Soprano/Util/SignalCacheModel
*
* \brief Caches multiple signals into one to avoid slowdown when adding
* or removing many statements.
*
* When adding or removing many statements with separate calls to Model::addStatement
* or Model::removeStatement Model emits signals Model::statementsAdded and Model::statementsRemoved
* over and over for each call. This can slow down an application that monitors
* the state of the model.
*
* The SignalCacheModel caches multiple emitted signals into one, trying to ensure
* that only one signal is delivered in a certain time. The downside of this is
* that signals are not delivered immiadetely but through the event loop. This,
* however, should seldomly be a problem.
*
* \author Sebastian Trueg <trueg@kde.org>
*
* \since 2.1
*/
class SOPRANO_EXPORT SignalCacheModel : public FilterModel
{
Q_OBJECT
public:
/**
* Create a new SignalCacheModel.
*
* \param parent The parent Model to forward
* the actual calls to.
*/
SignalCacheModel( Model* parent = 0 );
/**
* Destructor.
*/
virtual ~SignalCacheModel();
/**
* The cache time.
* \sa setCacheTime
*/
int cacheTime() const;
public Q_SLOTS:
/**
* Signals are only delivered once every \p msec milliseconds.
*
* Default value is 50
*/
void setCacheTime( int msec );
protected:
/**
* Reimplemented to do the actual signal caching.
*/
virtual void parentStatementsAdded();
/**
* Reimplemented to do the actual signal caching.
*/
virtual void parentStatementsRemoved();
void timerEvent( QTimerEvent* event );
private:
class Private;
Private* const d;
};
}
}
#endif
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