File indexing completed on 2024-05-12 05:09:52

 /***************************************************************************
     Copyright (C) 2011 Robby Stephenson <robby@periapsis.org>
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program 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) version 3 or any later version        *
  *   accepted by the membership of KDE e.V. (or its successor approved     *
  *   by the membership of KDE e.V.), which shall act as a proxy            *
  *   defined in Section 14 of version 3 of the license.                    *
  *                                                                         *
  *   This program 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 "entryselectionmodel.h"
 #include "models.h"
 #include "../tellico_debug.h"
 
 #include <QSet>
 
 using Tellico::EntrySelectionModel;
 
 EntrySelectionModel::EntrySelectionModel(QAbstractItemModel* targetModel_,
                                          QItemSelectionModel* selModel_,
                                          QObject* parent_)
     : KLinkItemSelectionModel(targetModel_, selModel_, parent_)
     , m_processing(false) {
   addSelectionProxy(selModel_);
   // when the entry model is reset, the selection signal is not triggered
   // using the modelReset signal does not work
   connect(targetModel_, &QAbstractItemModel::modelAboutToBeReset,
           this, &QItemSelectionModel::clear);
 }
 
 void EntrySelectionModel::addSelectionProxy(QItemSelectionModel* selModel_) {
   Q_ASSERT(selModel_);
   m_modelList += selModel_;
   connect(selModel_, &QItemSelectionModel::selectionChanged,
           this, &EntrySelectionModel::selectedEntriesChanged);
   connect(selModel_->model(), &QAbstractItemModel::modelAboutToBeReset,
           this, [this]() { m_selectedEntries.clear();});
 }
 
 void EntrySelectionModel::selectedEntriesChanged(const QItemSelection& selected_, const QItemSelection& deselected_) {
   // when clearSelection() is called on the other models, then there's a cascading series of calls to
   // selectedEntriesChanged(). But we only care about the first one
   if(m_processing) {
     return;
   }
   m_processing = true;
 
   QItemSelectionModel* selectionModel = qobject_cast<QItemSelectionModel*>(sender());
   Q_ASSERT(selectionModel);
   if(!selectionModel) {
     m_processing = false;
     return;
   }
 
   if(m_recentSelectionModel != selectionModel) {
     m_selectedEntries.clear();
   }
   m_recentSelectionModel = selectionModel;
 
   // clearing the selection in the other models will have cascading calls to selectionChanged()
   // now, add and remove selected entries from the list
   // the selection will include an index for every column, need to check for duplicates
   // can't use a QSet of entries since we want to retain the selection ordering
   QSet<Data::ID> IDlist;
   foreach(const QModelIndex& index, deselected_.indexes()) {
     Data::EntryPtr entry = index.data(EntryPtrRole).value<Data::EntryPtr>();
     if(entry && !IDlist.contains(entry->id())) {
       m_selectedEntries.removeOne(entry);
       IDlist += entry->id();
     }
   }
   IDlist.clear();
   foreach(const QModelIndex& index, selected_.indexes()) {
     Data::EntryPtr entry = index.data(EntryPtrRole).value<Data::EntryPtr>();
     if(entry && !IDlist.contains(entry->id())) {
       m_selectedEntries += entry;
       IDlist += entry->id();
     }
   }
 
   emit entriesSelected(m_selectedEntries);
   // for every selection model which did not call this function, clear the selection
   foreach(const QPointer<QItemSelectionModel>& ptr, m_modelList) { //krazy:exclude=foreach
     QItemSelectionModel* const otherModel = ptr.data();
     if(otherModel && otherModel != selectionModel) {
       otherModel->clearSelection();
     } else if(!otherModel) {
       // since the filter or loan view could be created multiple times
       // the selection model might be added multiple times
       // since foreach() creates a copy of the list, it's ok to remove this here
       m_modelList.removeOne(ptr);
     }
   }
   m_processing = false;
 }