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/* cache_proxy_model.h
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef CACHE_PROXY_MODEL_H
#define CACHE_PROXY_MODEL_H
#include <config.h>
#include <QIdentityProxyModel>
#include <QStandardItemModel>
/**
* Caches any data read access to the source model, returning an older copy if
* the source model is invalidated.
*
* Only flat data is supported at the moment, tree models (with parents) are
* unsupported.
*/
class CacheProxyModel : public QIdentityProxyModel
{
Q_OBJECT
public:
CacheProxyModel(QObject *parent = 0);
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
Qt::ItemFlags flags(const QModelIndex &index) const;
QVariant headerData(int section, Qt::Orientation orientation,
int role = Qt::DisplayRole) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
void setSourceModel(QAbstractItemModel *newSourceModel);
private:
mutable QStandardItemModel cache;
bool hasModel() const { return sourceModel() != &cache; }
private slots:
void resetCacheModel();
};
#endif
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