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0001 /**************************************************************************************** 0002 * Copyright (c) 2007 Nikolaj Hald Nielsen <nhn@kde.org> * 0003 * Copyright (c) 2008 Seb Ruiz <ruiz@kde.org> * 0004 * Copyright (c) 2013 Ralf Engels <ralf-engels@gmx.de> * 0005 * * 0006 * This program is free software; you can redistribute it and/or modify it under * 0007 * the terms of the GNU General Public License as published by the Free Software * 0008 * Foundation; either version 2 of the License, or (at your option) any later * 0009 * version. * 0010 * * 0011 * This program is distributed in the hope that it will be useful, but WITHOUT ANY * 0012 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A * 0013 * PARTICULAR PURPOSE. See the GNU General Public License for more details. * 0014 * * 0015 * You should have received a copy of the GNU General Public License along with * 0016 * this program. If not, see <http://www.gnu.org/licenses/>. * 0017 ****************************************************************************************/ 0018 0019 #ifndef COLLECTIONSORTFILTERPROXYMODEL_H 0020 #define COLLECTIONSORTFILTERPROXYMODEL_H 0021 0022 #include "core/meta/forward_declarations.h" 0023 0024 #include <QSortFilterProxyModel> 0025 0026 class CollectionTreeItem; 0027 class QCollator; 0028 0029 /** 0030 This is a custom QSortFilterProxyModel that gives special sort orders for 0031 our meta objects. 0032 e.g. it sorts tracks by disc number and track number. 0033 0034 @author Nikolaj Hald Nielsen <nhn@kde.org> 0035 */ 0036 class CollectionSortFilterProxyModel : public QSortFilterProxyModel 0037 { 0038 public: 0039 explicit CollectionSortFilterProxyModel( QObject *parent = nullptr ); 0040 0041 ~CollectionSortFilterProxyModel() override; 0042 0043 bool hasChildren(const QModelIndex &parent) const override; 0044 0045 protected: 0046 bool lessThan( const QModelIndex &left, const QModelIndex &right ) const override; 0047 bool filterAcceptsRow( int source_row, const QModelIndex & source_parent ) const override; 0048 0049 private: 0050 QCollator *m_col; 0051 0052 CollectionTreeItem* treeItem( const QModelIndex &index ) const; 0053 bool lessThanTrack( const QModelIndex &left, const QModelIndex &right ) const; 0054 bool lessThanAlbum( const QModelIndex &left, const QModelIndex &right ) const; 0055 bool lessThanItem( const QModelIndex &left, const QModelIndex &right ) const; 0056 }; 0057 0058 #endif