48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/* cache_proxy_model.h
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#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
|