File indexing completed on 2024-05-12 15:54:24

 /*
  * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB.  All rights reserved.
  *
  * This file is part of the KGantt library.
  *
  * 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) any later version.
  *
  * 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 <https://www.gnu.org/licenses/>.
  */
 
 #include "kganttforwardingproxymodel.h"
 
 #include <cassert>
 #include <QStringList>
 
 using namespace KGantt;
 
 typedef QAbstractProxyModel BASE;
 
 
 ForwardingProxyModel::ForwardingProxyModel( QObject* parent )
     : BASE( parent )
 {
 }
 
 ForwardingProxyModel::~ForwardingProxyModel()
 {
 }
 
 
 QModelIndex ForwardingProxyModel::mapFromSource( const QModelIndex & sourceIndex ) const
 {
     if ( !sourceIndex.isValid() )
         return QModelIndex();
     assert( sourceIndex.model() == sourceModel() );
 
     // Create an index that preserves the internal pointer from the source;
     // this way KDDataConverterProxyModel preserves the structure of the source model
     return createIndex( sourceIndex.row(), sourceIndex.column(), sourceIndex.internalPointer() );
 }
 #ifdef __GNUC__
 #if __GNUC__ > 3
 #define ATTRIBUTE __attribute__((__may_alias__))
 #endif
 #else
 #define ATTRIBUTE
 #endif
 namespace {
     // Think this is ugly? Well, it's not from me, it comes from QProxyModel
     struct ATTRIBUTE KDPrivateModelIndex {
         int r, c;
         void *p;
         const QAbstractItemModel *m;
     };
 }
 
 
 QModelIndex ForwardingProxyModel::mapToSource( const QModelIndex & proxyIndex ) const
 {
     if ( !proxyIndex.isValid() )
         return QModelIndex();
     assert( proxyIndex.model() == this );
     // So here we need to create a source index which holds that internal pointer.
     // No way to pass it to sourceModel()->index... so we have to do the ugly way:
     QModelIndex sourceIndex;
     KDPrivateModelIndex* hack = reinterpret_cast<KDPrivateModelIndex*>(&sourceIndex);
     hack->r = proxyIndex.row();
     hack->c = proxyIndex.column();
     hack->p = proxyIndex.internalPointer();
     hack->m = sourceModel();
     assert( sourceIndex.isValid() );
     return sourceIndex;
 }
 
 
 void ForwardingProxyModel::setSourceModel( QAbstractItemModel* model )
 {
     if ( sourceModel() ) sourceModel()->disconnect( this );
     BASE::setSourceModel( model );
 
     if (!model) return;
 
     connect( model, SIGNAL(modelAboutToBeReset()), this, SLOT(sourceModelAboutToBeReset()) );
     connect( model, SIGNAL(modelReset()), this, SLOT(sourceModelReset()) );
     connect( model, SIGNAL(layoutAboutToBeChanged()), this, SLOT(sourceLayoutAboutToBeChanged()) );
     connect( model, SIGNAL(layoutChanged()), this, SLOT(sourceLayoutChanged()) );
 
     connect( model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
              this, SLOT(sourceDataChanged(QModelIndex,QModelIndex)) );
 
 
     connect( model,  SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
              this, SLOT(sourceColumnsAboutToBeInserted(QModelIndex,int,int)) );
     connect( model,  SIGNAL(columnsInserted(QModelIndex,int,int)),
              this, SLOT(sourceColumnsInserted(QModelIndex,int,int)) );
     connect( model,  SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
              this, SLOT(sourceColumnsAboutToBeRemoved(QModelIndex,int,int)) );
     connect( model,  SIGNAL(columnsRemoved(QModelIndex,int,int)),
              this, SLOT(sourceColumnsRemoved(QModelIndex,int,int)) );
 
     connect( model,  SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
              this, SLOT(sourceRowsAboutToBeInserted(QModelIndex,int,int)) );
     connect( model,  SIGNAL(rowsInserted(QModelIndex,int,int)),
              this, SLOT(sourceRowsInserted(QModelIndex,int,int)) );
     connect( model,  SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
              this, SLOT(sourceRowsAboutToBeRemoved(QModelIndex,int,int)) );
     connect( model,  SIGNAL(rowsRemoved(QModelIndex,int,int)),
              this, SLOT(sourceRowsRemoved(QModelIndex,int,int)) );
 }
 
 
 void ForwardingProxyModel::sourceModelAboutToBeReset()
 {
     // The matching signal is emitted be reset()
 }
 
 
 void ForwardingProxyModel::sourceModelReset()
 {
   //qDebug() << "ForwardingProxyModel::sourceModelReset()";
     beginResetModel();
     endResetModel();
 }
 
 
 
 void ForwardingProxyModel::sourceLayoutAboutToBeChanged()
 {
   //qDebug() << "ForwardingProxyModel::sourceLayoutAboutToBeChanged()";
     Q_EMIT layoutAboutToBeChanged();
 }
 
 
 void ForwardingProxyModel::sourceLayoutChanged()
 {
   //qDebug() << "ForwardingProxyModel::sourceLayoutChanged()";
     beginResetModel();
     endResetModel();
 }
 
 
 void ForwardingProxyModel::sourceDataChanged( const QModelIndex& from, const QModelIndex& to )
 {
   //qDebug() << "ForwardingProxyModel::sourceDataChanged("<<from<<to<<")";
     Q_EMIT dataChanged( mapFromSource( from ), mapFromSource( to ) );
 }
 
 
 void ForwardingProxyModel::sourceColumnsAboutToBeInserted( const QModelIndex& parentIdx,
                                                                     int start,
                                                                     int end )
 {
     beginInsertColumns( mapFromSource( parentIdx ), start, end );
 }
 
 
 void ForwardingProxyModel::sourceColumnsInserted( const QModelIndex& parentIdx, int start, int end )
 {
     Q_UNUSED( parentIdx );
     Q_UNUSED( start );
     Q_UNUSED( end );
     endInsertColumns();
 }
 
 
 void ForwardingProxyModel::sourceColumnsAboutToBeRemoved( const QModelIndex& parentIdx,
                                                                     int start,
                                                                     int end )
 {
     beginRemoveColumns( mapFromSource( parentIdx ), start, end );
 }
 
 
 void ForwardingProxyModel::sourceColumnsRemoved( const QModelIndex& parentIdx, int start, int end )
 {
     Q_UNUSED( parentIdx );
     Q_UNUSED( start );
     Q_UNUSED( end );
     endRemoveColumns();
 }
 
 
 void ForwardingProxyModel::sourceRowsAboutToBeInserted( const QModelIndex & parentIdx, int start, int end )
 {
     beginInsertRows( mapFromSource( parentIdx ), start, end );
 }
 
 
 void ForwardingProxyModel::sourceRowsInserted( const QModelIndex& parentIdx, int start, int end )
 {
     Q_UNUSED( parentIdx );
     Q_UNUSED( start );
     Q_UNUSED( end );
     endInsertRows();
 }
 
 
 void ForwardingProxyModel::sourceRowsAboutToBeRemoved( const QModelIndex & parentIdx, int start, int end )
 {
     beginRemoveRows( mapFromSource( parentIdx ), start, end );
 }
 
 
 void ForwardingProxyModel::sourceRowsRemoved( const QModelIndex& parentIdx, int start, int end )
 {
     Q_UNUSED( parentIdx );
     Q_UNUSED( start );
     Q_UNUSED( end );
     endRemoveRows();
 }
 
 
 int ForwardingProxyModel::rowCount( const QModelIndex& idx ) const
 {
     return sourceModel()->rowCount( mapToSource( idx ) );
 }
 
 
 int ForwardingProxyModel::columnCount( const QModelIndex& idx ) const
 {
     return sourceModel()->columnCount( mapToSource( idx ) );
 }
 
 
 QModelIndex ForwardingProxyModel::index( int row, int column, const QModelIndex& parent ) const
 {
     return mapFromSource( sourceModel()->index( row, column, mapToSource( parent ) ) );
 }
 
 
 QModelIndex ForwardingProxyModel::parent( const QModelIndex& idx ) const
 {
     return mapFromSource( sourceModel()->parent( mapToSource( idx ) ) );
 }
 
 
 bool ForwardingProxyModel::setData( const QModelIndex& index, const QVariant& value, int role )
 {
   //qDebug() << "ForwardingProxyModel::setData( " << index<<value<< role<<")";
     return sourceModel()->setData( mapToSource( index ), value, role );
 }
 
 QMimeData *ForwardingProxyModel::mimeData(const QModelIndexList &indexes) const
 {
     QModelIndexList source_indexes;
     for (int i = 0; i < indexes.count(); ++i)
         source_indexes << mapToSource(indexes.at(i));
     return sourceModel()->mimeData(source_indexes);
 }
 
 bool ForwardingProxyModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)
 {
     if ((row == -1) && (column == -1))
         return sourceModel()->dropMimeData(data, action, -1, -1, mapToSource(parent));
     int source_destination_row = -1;
     int source_destination_column = -1;
     QModelIndex source_parent;
     if (row == rowCount(parent)) {
         source_parent = mapToSource(parent);
         source_destination_row = sourceModel()->rowCount(source_parent);
     } else {
         QModelIndex proxy_index = index(row, column, parent);
         QModelIndex source_index = mapToSource(proxy_index);
         source_destination_row = source_index.row();
         source_destination_column = source_index.column();
         source_parent = source_index.parent();
     }
     return sourceModel()->dropMimeData(data, action, source_destination_row, source_destination_column, source_parent);
 }
 
 QStringList ForwardingProxyModel::mimeTypes() const
 {
     return sourceModel()->mimeTypes();
 }
 
 Qt::DropActions ForwardingProxyModel::supportedDropActions() const
 {
     return sourceModel()->supportedDropActions();
 }
         
 #include "moc_kganttforwardingproxymodel.cpp"