02e80019f2
Following the move for widgets and utils directory, moving models and delegates to the utils directory. Guidelines for this directory are: - Implementation of a model - Implementation of a delegate - Utility class for data storage used by a model Note: additionally all includes affected by this move have been changed to absolute path includes, instead of relative ones. Change-Id: I3bb868af7d3570437682b722a0cd46c906628570 Reviewed-on: https://code.wireshark.org/review/22790 Reviewed-by: Roland Knall <rknall@gmail.com>
113 lines
3.4 KiB
C++
113 lines
3.4 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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* 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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#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, SIGNAL(modelReset()),
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this, SLOT(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(), SIGNAL(modelReset()),
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this, SLOT(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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