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