File indexing completed on 2024-05-19 04:56:00

 /**
  * \file dirproxymodel.cpp
  * Proxy for filesystem model which filters directories.
  *
  * \b Project: Kid3
  * \author Urs Fleisch
  * \date 19-Mar-2011
  *
  * Copyright (C) 2011-2024  Urs Fleisch
  *
  * This file is part of Kid3.
  *
  * Kid3 is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * Kid3 is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "dirproxymodel.h"
 #include <QDateTime>
 #include "taggedfilesystemmodel.h"
 
 /**
  * Constructor.
  *
  * @param parent parent object
  */
 DirProxyModel::DirProxyModel(QObject* parent) : QSortFilterProxyModel(parent)
 {
   setObjectName(QLatin1String("DirProxyModel"));
 }
 
 /**
  * Get item flags.
  * @param index index of item
  * @return default flags without editable.
  */
 Qt::ItemFlags DirProxyModel::flags(const QModelIndex& index) const
 {
   // Prevent inplace editing (i.e. renaming) of directories.
   return QSortFilterProxyModel::flags(index) & ~Qt::ItemIsEditable;
 }
 
 /**
  * Check if row should be included in model.
  *
  * @param srcRow source row
  * @param srcParent source parent
  *
  * @return true to include row.
  */
 bool DirProxyModel::filterAcceptsRow(int srcRow, const QModelIndex& srcParent) const
 {
   if (auto srcModel = qobject_cast<FileSystemModel*>(sourceModel())) {
     return srcModel->isDir(srcModel->index(srcRow, 0, srcParent));
   }
   return false;
 }
 
 /**
  * Sort comparison function.
  * @param left index of left item in source model
  * @param right index of right item in source model
  * @return true if left is less than right.
  */
 bool DirProxyModel::lessThan(const QModelIndex& left,
                              const QModelIndex& right) const
 {
   // "." and ".." shall be in the first and second row.
   bool orderIsAscending = sortOrder() == Qt::AscendingOrder;
   QString leftName = left.sibling(left.row(), 0).data().toString();
   if (leftName == QLatin1String(".")) {
     return orderIsAscending;
   }
   QString rightName = right.sibling(right.row(), 0).data().toString();
   if (rightName == QLatin1String(".")) {
     return !orderIsAscending;
   }
   if (leftName == QLatin1String("..")) {
     return orderIsAscending;
   }
   if (rightName == QLatin1String("..")) {
     return !orderIsAscending;
   }
 
   // The data() in FileSystemModel are String QVariants, therefore
   // QSortFilterProxyModel::lessThan() is of no use here, custom sorting
   // has to be used.
   Q_ASSERT_X(sourceModel()->metaObject() == &TaggedFileSystemModel::staticMetaObject,
              "lessThan", "source model must be FileSystemModel");
   auto fsModel = static_cast<FileSystemModel*>(sourceModel());
   switch (sortColumn()) {
   case 0:
     return left.data().toString().compare(right.data().toString()) < 0;
   case 1:
     return fsModel->size(left) < fsModel->size(right);
   case 2:
     return fsModel->type(left) < fsModel->type(right);
   case 3:
     return fsModel->lastModified(left) < fsModel->lastModified(right);
   }
   qWarning("DirProxyModel: Invalid sort column %d",
            sortColumn());
   return QSortFilterProxyModel::lessThan(left, right);
 }