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/* cache_proxy_model.cpp
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0+*/
#include <ui/qt/models/cache_proxy_model.h>
CacheProxyModel::CacheProxyModel(QObject *parent) : QIdentityProxyModel(parent)
{
}
QVariant CacheProxyModel::data(const QModelIndex &index, int role) const
{
QModelIndex dataIndex = cache.index(index.row(), index.column());
if (!dataIndex.isValid()) {
// index is possibly outside columnCount or rowCount
return QVariant();
}
if (hasModel()) {
QVariant value = QIdentityProxyModel::data(index, role);
cache.setData(dataIndex, value, role);
return value;
} else {
return cache.data(dataIndex, role);
}
}
Qt::ItemFlags CacheProxyModel::flags(const QModelIndex &index) const
{
if (hasModel()) {
return QIdentityProxyModel::flags(index);
} else {
// Override default to prevent editing.
return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
}
}
QVariant CacheProxyModel::headerData(int section, Qt::Orientation orientation,
int role) const
{
if (hasModel()) {
QVariant value = QIdentityProxyModel::headerData(section, orientation, role);
cache.setHeaderData(section, orientation, value, role);
return value;
} else {
return cache.headerData(section, orientation, role);
}
}
int CacheProxyModel::rowCount(const QModelIndex &parent) const
{
if (hasModel()) {
int count = QIdentityProxyModel::rowCount(parent);
cache.setRowCount(count);
return count;
} else {
return cache.rowCount(parent);
}
}
int CacheProxyModel::columnCount(const QModelIndex &parent) const
{
if (hasModel()) {
int count = QIdentityProxyModel::columnCount(parent);
cache.setColumnCount(count);
return count;
} else {
return cache.columnCount(parent);
}
}
/**
* Sets the source model from which data must be pulled. If newSourceModel is
* NULL, then the cache will be used.
*/
void CacheProxyModel::setSourceModel(QAbstractItemModel *newSourceModel)
{
if (newSourceModel) {
cache.clear();
QIdentityProxyModel::setSourceModel(newSourceModel);
connect(newSourceModel, SIGNAL(modelReset()),
this, SLOT(resetCacheModel()));
} else {
if (sourceModel()) {
// Prevent further updates to source model from invalidating cache.
disconnect(sourceModel(), SIGNAL(modelReset()),
this, SLOT(resetCacheModel()));
}
QIdentityProxyModel::setSourceModel(&cache);
}
}
void CacheProxyModel::resetCacheModel() {
cache.clear();
}
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