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