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qgsattributetablefiltermodel.cpp
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qgsattributetablefiltermodel.cpp
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/***************************************************************************
QgsAttributeTableFilterModel.cpp
--------------------------------------
Date : Feb 2009
Copyright : (C) 2009 Vita Cizek
Email : weetya (at) gmail.com
***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <QItemSelectionModel>
#include <QApplication>
#include "qgis.h"
#include "qgsattributetablefiltermodel.h"
#include "qgsattributetablemodel.h"
#include "qgsfeatureiterator.h"
#include "qgsvectorlayer.h"
#include "qgsvectorlayertemporalproperties.h"
#include "qgsfeature.h"
#include "qgsmapcanvas.h"
#include "qgslogger.h"
#include "qgsrenderer.h"
#include "qgsvectorlayereditbuffer.h"
#include "qgsexpressioncontextutils.h"
#include "qgsvectorlayercache.h"
#include "qgsrendercontext.h"
#include "qgsmapcanvasutils.h"
//////////////////
// Filter Model //
//////////////////
QgsAttributeTableFilterModel::QgsAttributeTableFilterModel( QgsMapCanvas *canvas, QgsAttributeTableModel *sourceModel, QObject *parent )
: QSortFilterProxyModel( parent )
, mCanvas( canvas )
{
setSourceModel( sourceModel );
setDynamicSortFilter( true );
setSortRole( static_cast< int >( QgsAttributeTableModel::CustomRole::Sort ) );
connect( layer(), &QgsVectorLayer::selectionChanged, this, &QgsAttributeTableFilterModel::selectionChanged );
mReloadVisibleTimer.setSingleShot( true );
connect( &mReloadVisibleTimer, &QTimer::timeout, this, &QgsAttributeTableFilterModel::reloadVisible );
mFilterFeaturesTimer.setSingleShot( true );
connect( &mFilterFeaturesTimer, &QTimer::timeout, this, &QgsAttributeTableFilterModel::filterFeatures );
}
bool QgsAttributeTableFilterModel::lessThan( const QModelIndex &left, const QModelIndex &right ) const
{
if ( mSelectedOnTop )
{
const bool leftSelected = layer()->selectedFeatureIds().contains( masterModel()->rowToId( left.row() ) );
const bool rightSelected = layer()->selectedFeatureIds().contains( masterModel()->rowToId( right.row() ) );
if ( leftSelected && !rightSelected )
{
return sortOrder() == Qt::AscendingOrder;
}
else if ( rightSelected && !leftSelected )
{
return sortOrder() == Qt::DescendingOrder;
}
}
if ( mTableModel->sortCacheExpression().isEmpty() )
{
//shortcut when no sort order set
return false;
}
return qgsVariantLessThan( left.data( static_cast< int >( QgsAttributeTableModel::CustomRole::Sort ) ),
right.data( static_cast< int >( QgsAttributeTableModel::CustomRole::Sort ) ) );
}
void QgsAttributeTableFilterModel::sort( int column, Qt::SortOrder order )
{
if ( order != Qt::AscendingOrder && order != Qt::DescendingOrder )
order = Qt::AscendingOrder;
if ( column < 0 || column >= mColumnMapping.size() )
{
sort( QString() );
}
else
{
const int myColumn = mColumnMapping.at( column );
masterModel()->prefetchColumnData( myColumn );
QSortFilterProxyModel::sort( myColumn, order );
}
emit sortColumnChanged( column, order );
}
QVariant QgsAttributeTableFilterModel::data( const QModelIndex &index, int role ) const
{
if ( mapColumnToSource( index.column() ) == -1 ) // actions
{
if ( role == static_cast< int >( CustomRole::Type ) )
return ColumnTypeActionButton;
else if ( role == static_cast< int >( QgsAttributeTableModel::CustomRole::FeatureId ) )
{
const QModelIndex fieldIndex = QSortFilterProxyModel::mapToSource( QSortFilterProxyModel::index( index.row(), 0, index.parent() ) );
return sourceModel()->data( fieldIndex, static_cast< int >( QgsAttributeTableModel::CustomRole::FeatureId ) );
}
}
else if ( role == static_cast< int >( CustomRole::Type ) )
return ColumnTypeField;
return QSortFilterProxyModel::data( index, role );
}
QVariant QgsAttributeTableFilterModel::headerData( int section, Qt::Orientation orientation, int role ) const
{
if ( orientation == Qt::Horizontal )
{
if ( mColumnMapping.at( section ) == -1 && role == Qt::DisplayRole )
return tr( "Actions" );
else
{
const int sourceSection = mapColumnToSource( section );
return sourceModel()->headerData( sourceSection, orientation, role );
}
}
else
{
if ( role == Qt::DisplayRole )
return section + 1;
else
{
const int sourceSection = mapToSource( index( section, ( !mColumnMapping.isEmpty() && mColumnMapping.at( 0 ) == -1 ) ? 1 : 0 ) ).row();
return sourceModel()->headerData( sourceSection, orientation, role );
}
}
}
int QgsAttributeTableFilterModel::actionColumnIndex() const
{
return mColumnMapping.indexOf( -1 );
}
int QgsAttributeTableFilterModel::columnCount( const QModelIndex &parent ) const
{
Q_UNUSED( parent )
return mColumnMapping.count();
}
void QgsAttributeTableFilterModel::setAttributeTableConfig( const QgsAttributeTableConfig &config, bool force )
{
const QgsAttributeTableConfig oldConfig = mConfig;
mConfig = config;
mConfig.update( layer()->fields() );
if ( !force && mConfig.hasSameColumns( oldConfig ) )
{
return;
}
QVector<int> newColumnMapping;
const auto constColumns = mConfig.columns();
for ( const QgsAttributeTableConfig::ColumnConfig &columnConfig : constColumns )
{
// Hidden? Forget about this column
if ( columnConfig.hidden )
continue;
// The new value for the mapping (field index or -1 for action column)
const int newValue = ( columnConfig.type == QgsAttributeTableConfig::Action ) ? -1 : layer()->fields().lookupField( columnConfig.name );
newColumnMapping << newValue;
}
if ( newColumnMapping != mColumnMapping )
{
bool requiresReset = false;
int firstRemovedColumn = -1;
int removedColumnCount = 0;
// Check if there have a contiguous set of columns have been removed or if we require a full reset
for ( int i = 0; i < std::min( newColumnMapping.size(), mColumnMapping.size() - removedColumnCount ); ++i )
{
if ( newColumnMapping.at( i ) == mColumnMapping.at( i + removedColumnCount ) )
continue;
if ( firstRemovedColumn == -1 )
{
firstRemovedColumn = i;
while ( i < mColumnMapping.size() - removedColumnCount && mColumnMapping.at( i + removedColumnCount ) != newColumnMapping.at( i ) )
{
++removedColumnCount;
}
}
else
{
requiresReset = true;
break;
}
}
// No difference found so far
if ( firstRemovedColumn == -1 )
{
if ( newColumnMapping.size() > mColumnMapping.size() )
{
// More columns: appended to the end
beginInsertColumns( QModelIndex(), mColumnMapping.size(), newColumnMapping.size() - 1 );
mColumnMapping = newColumnMapping;
endInsertColumns();
}
else
{
// Less columns: removed from the end
beginRemoveColumns( QModelIndex(), newColumnMapping.size(), mColumnMapping.size() - 1 );
mColumnMapping = newColumnMapping;
endRemoveColumns();
}
}
else
{
if ( newColumnMapping.size() == mColumnMapping.size() - removedColumnCount )
{
//the amount of removed column in the model need to be equal removedColumnCount
beginRemoveColumns( QModelIndex(), firstRemovedColumn, firstRemovedColumn + removedColumnCount - 1 );
mColumnMapping = newColumnMapping;
endRemoveColumns();
}
else
{
requiresReset = true;
}
}
if ( requiresReset )
{
beginResetModel();
mColumnMapping = newColumnMapping;
endResetModel();
}
}
if ( !config.sortExpression().isEmpty() )
sort( config.sortExpression(), config.sortOrder() );
}
void QgsAttributeTableFilterModel::setFilterExpression( const QgsExpression &expression, const QgsExpressionContext &context )
{
mFilterExpression = expression;
mFilterExpressionContext = context;
}
void QgsAttributeTableFilterModel::sort( const QString &expression, Qt::SortOrder order )
{
if ( order != Qt::AscendingOrder && order != Qt::DescendingOrder )
order = Qt::AscendingOrder;
QSortFilterProxyModel::sort( -1 );
masterModel()->prefetchSortData( expression );
QSortFilterProxyModel::sort( 0, order );
}
QString QgsAttributeTableFilterModel::sortExpression() const
{
return masterModel()->sortCacheExpression();
}
void QgsAttributeTableFilterModel::setSelectedOnTop( bool selectedOnTop )
{
if ( mSelectedOnTop != selectedOnTop )
{
mSelectedOnTop = selectedOnTop;
int column = sortColumn();
Qt::SortOrder order = sortOrder();
// set default sort values if they are not correctly set
if ( column < 0 )
column = 0;
if ( order != Qt::AscendingOrder && order != Qt::DescendingOrder )
order = Qt::AscendingOrder;
sort( 0, Qt::AscendingOrder );
invalidate();
}
}
void QgsAttributeTableFilterModel::setSourceModel( QgsAttributeTableModel *sourceModel )
{
mTableModel = sourceModel;
for ( int i = 0; i < mTableModel->columnCount() - mTableModel->extraColumns(); ++i )
{
mColumnMapping.append( i );
}
QSortFilterProxyModel::setSourceModel( sourceModel );
// Disconnect any code to update columns in the parent, we handle this manually
disconnect( mTableModel, SIGNAL( columnsAboutToBeInserted( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsAboutToBeInserted( QModelIndex, int, int ) ) );
disconnect( mTableModel, SIGNAL( columnsInserted( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsInserted( QModelIndex, int, int ) ) );
disconnect( mTableModel, SIGNAL( columnsAboutToBeRemoved( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsAboutToBeRemoved( QModelIndex, int, int ) ) );
disconnect( mTableModel, SIGNAL( columnsRemoved( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsRemoved( QModelIndex, int, int ) ) );
// The following connections are needed in order to keep the filter model in sync, see: regression #15974
connect( mTableModel, &QAbstractItemModel::columnsAboutToBeInserted, this, &QgsAttributeTableFilterModel::onColumnsChanged );
connect( mTableModel, &QAbstractItemModel::columnsAboutToBeRemoved, this, &QgsAttributeTableFilterModel::onColumnsChanged );
}
bool QgsAttributeTableFilterModel::selectedOnTop()
{
return mSelectedOnTop;
}
void QgsAttributeTableFilterModel::setFilteredFeatures( const QgsFeatureIds &ids )
{
mFilteredFeatures = ids;
if ( mFilterMode != ShowFilteredList &&
mFilterMode != ShowInvalid )
{
setFilterMode( ShowFilteredList );
}
invalidateFilter();
}
QgsFeatureIds QgsAttributeTableFilterModel::filteredFeatures()
{
QgsFeatureIds ids;
ids.reserve( rowCount() );
for ( int i = 0; i < rowCount(); ++i )
{
const QModelIndex row = index( i, 0 );
ids << rowToId( row );
}
return ids;
}
void QgsAttributeTableFilterModel::setFilterMode( FilterMode filterMode )
{
if ( filterMode != mFilterMode )
{
disconnectFilterModeConnections();
connectFilterModeConnections( filterMode );
mFilterMode = filterMode;
invalidate();
if ( mFilterMode == QgsAttributeTableFilterModel::ShowInvalid )
{
filterFeatures();
}
}
}
void QgsAttributeTableFilterModel::disconnectFilterModeConnections()
{
// cleanup existing connections
switch ( mFilterMode )
{
case ShowVisible:
disconnect( mCanvas, &QgsMapCanvas::extentsChanged, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
disconnect( mCanvas, &QgsMapCanvas::temporalRangeChanged, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
disconnect( layer(), &QgsVectorLayer::featureAdded, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
disconnect( layer(), &QgsVectorLayer::geometryChanged, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
break;
case ShowAll:
case ShowEdited:
case ShowSelected:
break;
case ShowFilteredList:
case ShowInvalid:
disconnect( layer(), &QgsVectorLayer::featureAdded, this, &QgsAttributeTableFilterModel::startTimedFilterFeatures );
disconnect( layer(), &QgsVectorLayer::attributeValueChanged, this, &QgsAttributeTableFilterModel::onAttributeValueChanged );
disconnect( layer(), &QgsVectorLayer::geometryChanged, this, &QgsAttributeTableFilterModel::onGeometryChanged );
break;
}
}
void QgsAttributeTableFilterModel::connectFilterModeConnections( QgsAttributeTableFilterModel::FilterMode filterMode )
{
// setup new connections
switch ( filterMode )
{
case ShowVisible:
connect( mCanvas, &QgsMapCanvas::extentsChanged, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
connect( mCanvas, &QgsMapCanvas::temporalRangeChanged, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
connect( layer(), &QgsVectorLayer::featureAdded, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
connect( layer(), &QgsVectorLayer::geometryChanged, this, &QgsAttributeTableFilterModel::startTimedReloadVisible );
generateListOfVisibleFeatures();
break;
case ShowAll:
case ShowEdited:
case ShowSelected:
break;
case ShowFilteredList:
case ShowInvalid:
connect( layer(), &QgsVectorLayer::featureAdded, this, &QgsAttributeTableFilterModel::startTimedFilterFeatures );
connect( layer(), &QgsVectorLayer::attributeValueChanged, this, &QgsAttributeTableFilterModel::onAttributeValueChanged );
connect( layer(), &QgsVectorLayer::geometryChanged, this, &QgsAttributeTableFilterModel::onGeometryChanged );
break;
}
}
bool QgsAttributeTableFilterModel::filterAcceptsRow( int sourceRow, const QModelIndex &sourceParent ) const
{
Q_UNUSED( sourceParent )
switch ( mFilterMode )
{
case ShowAll:
return true;
case ShowFilteredList:
case ShowInvalid:
return mFilteredFeatures.contains( masterModel()->rowToId( sourceRow ) );
case ShowSelected:
return layer()->selectedFeatureIds().contains( masterModel()->rowToId( sourceRow ) );
case ShowVisible:
return mFilteredFeatures.contains( masterModel()->rowToId( sourceRow ) );
case ShowEdited:
{
QgsVectorLayerEditBuffer *editBuffer = layer()->editBuffer();
if ( editBuffer )
{
const QgsFeatureId fid = masterModel()->rowToId( sourceRow );
if ( editBuffer->isFeatureAdded( fid ) )
return true;
if ( editBuffer->isFeatureAttributesChanged( fid ) )
return true;
if ( editBuffer->isFeatureGeometryChanged( fid ) )
return true;
return false;
}
return false;
}
default:
Q_ASSERT( false ); // In debug mode complain
return true; // In release mode accept row
}
// returns are handled in their respective case statement above
}
void QgsAttributeTableFilterModel::extentsChanged()
{
reloadVisible();
}
void QgsAttributeTableFilterModel::reloadVisible()
{
generateListOfVisibleFeatures();
invalidateFilter();
emit visibleReloaded();
}
void QgsAttributeTableFilterModel::onAttributeValueChanged( QgsFeatureId fid, int idx, const QVariant &value )
{
Q_UNUSED( fid );
Q_UNUSED( value );
if ( mFilterMode == QgsAttributeTableFilterModel::ShowInvalid || mFilterExpression.referencedAttributeIndexes( layer()->fields() ).contains( idx ) )
{
startTimedFilterFeatures();
}
}
void QgsAttributeTableFilterModel::onGeometryChanged()
{
if ( mFilterMode == QgsAttributeTableFilterModel::ShowInvalid || mFilterExpression.needsGeometry() )
{
startTimedFilterFeatures();
}
}
void QgsAttributeTableFilterModel::startTimedReloadVisible()
{
mReloadVisibleTimer.start( 10 );
}
void QgsAttributeTableFilterModel::startTimedFilterFeatures()
{
mFilterFeaturesTimer.start( 10 );
}
void QgsAttributeTableFilterModel::filterFeatures()
{
if ( !mFilterExpression.isValid() )
return;
QgsFeatureIds filteredFeatures;
QgsDistanceArea distanceArea;
distanceArea.setSourceCrs( mTableModel->layer()->crs(), QgsProject::instance()->transformContext() );
distanceArea.setEllipsoid( QgsProject::instance()->ellipsoid() );
const bool fetchGeom = mFilterExpression.needsGeometry();
QApplication::setOverrideCursor( Qt::WaitCursor );
mFilterExpression.setGeomCalculator( &distanceArea );
mFilterExpression.setDistanceUnits( QgsProject::instance()->distanceUnits() );
mFilterExpression.setAreaUnits( QgsProject::instance()->areaUnits() );
QgsFeatureRequest request( mTableModel->request() );
request.setSubsetOfAttributes( mFilterExpression.referencedColumns(), mTableModel->layer()->fields() );
if ( !fetchGeom )
{
request.setFlags( Qgis::FeatureRequestFlag::NoGeometry );
}
else
{
// force geometry extraction if the filter requests it
request.setFlags( request.flags() & ~static_cast<int>( Qgis::FeatureRequestFlag::NoGeometry ) );
}
QgsFeatureIterator featIt = mTableModel->layer()->getFeatures( request );
QgsFeature f;
// Record the first evaluation error
QString error;
while ( featIt.nextFeature( f ) )
{
mFilterExpressionContext.setFeature( f );
if ( mFilterExpression.evaluate( &mFilterExpressionContext ).toInt() != 0 )
filteredFeatures << f.id();
// check if there were errors during evaluating
if ( mFilterExpression.hasEvalError() && error.isEmpty() )
{
error = mFilterExpression.evalErrorString( );
}
}
featIt.close();
setFilteredFeatures( filteredFeatures );
QApplication::restoreOverrideCursor();
emit featuresFiltered();
if ( ! error.isEmpty() )
{
emit filterError( error );
}
}
void QgsAttributeTableFilterModel::selectionChanged()
{
if ( ShowSelected == mFilterMode )
{
invalidateFilter();
}
else if ( mSelectedOnTop )
{
invalidate();
}
}
void QgsAttributeTableFilterModel::onColumnsChanged()
{
setAttributeTableConfig( mConfig );
}
int QgsAttributeTableFilterModel::mapColumnToSource( int column ) const
{
if ( mColumnMapping.isEmpty() )
return column;
if ( column < 0 || column >= mColumnMapping.size() )
return -1;
else
return mColumnMapping.at( column );
}
int QgsAttributeTableFilterModel::mapColumnFromSource( int column ) const
{
if ( mColumnMapping.isEmpty() )
return column;
else
return mColumnMapping.indexOf( column );
}
void QgsAttributeTableFilterModel::generateListOfVisibleFeatures()
{
if ( !layer() )
return;
bool filter = false;
const QgsRectangle rect = mCanvas->mapSettings().mapToLayerCoordinates( layer(), mCanvas->extent() );
QgsRenderContext renderContext;
renderContext.expressionContext().appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( layer() ) );
mFilteredFeatures.clear();
if ( !layer()->renderer() )
{
QgsDebugError( QStringLiteral( "Cannot get renderer" ) );
return;
}
std::unique_ptr< QgsFeatureRenderer > renderer( layer()->renderer()->clone() );
const QgsMapSettings &ms = mCanvas->mapSettings();
if ( !layer()->isInScaleRange( ms.scale() ) )
{
QgsDebugMsgLevel( QStringLiteral( "Out of scale limits" ), 2 );
}
else
{
if ( renderer->capabilities() & QgsFeatureRenderer::ScaleDependent )
{
// setup scale
// mapRenderer()->renderContext()->scale is not automatically updated when
// render extent changes (because it's scale is used to identify if changed
// since last render) -> use local context
renderContext.setExtent( ms.visibleExtent() );
renderContext.setMapToPixel( ms.mapToPixel() );
renderContext.setRendererScale( ms.scale() );
}
filter = renderer->capabilities() & QgsFeatureRenderer::Filter;
}
renderer->startRender( renderContext, layer()->fields() );
QgsFeatureRequest r( masterModel()->request() );
if ( r.spatialFilterType() == Qgis::SpatialFilterType::BoundingBox )
{
r.setFilterRect( r.filterRect().intersect( rect ) );
}
else
{
r.setFilterRect( rect );
}
const QString canvasFilter = QgsMapCanvasUtils::filterForLayer( mCanvas, layer() );
if ( canvasFilter == QLatin1String( "FALSE" ) )
return;
if ( !canvasFilter.isEmpty() )
r.setFilterExpression( canvasFilter );
QgsFeatureIterator features = masterModel()->layerCache()->getFeatures( r );
QgsFeature f;
while ( features.nextFeature( f ) )
{
renderContext.expressionContext().setFeature( f );
if ( !filter || renderer->willRenderFeature( f, renderContext ) )
{
mFilteredFeatures << f.id();
}
#if 0
if ( t.elapsed() > 5000 )
{
bool cancel = false;
emit progress( i, cancel );
if ( cancel )
break;
t.restart();
}
#endif
}
features.close();
if ( renderer->capabilities() & QgsFeatureRenderer::ScaleDependent )
{
renderer->stopRender( renderContext );
}
}
QgsFeatureId QgsAttributeTableFilterModel::rowToId( const QModelIndex &row )
{
return masterModel()->rowToId( mapToSource( row ).row() );
}
QModelIndex QgsAttributeTableFilterModel::fidToIndex( QgsFeatureId fid )
{
return mapFromMaster( masterModel()->idToIndex( fid ) );
}
QModelIndexList QgsAttributeTableFilterModel::fidToIndexList( QgsFeatureId fid )
{
QModelIndexList indexes;
const auto constIdToIndexList = masterModel()->idToIndexList( fid );
for ( const QModelIndex &idx : constIdToIndexList )
{
indexes.append( mapFromMaster( idx ) );
}
return indexes;
}
QModelIndex QgsAttributeTableFilterModel::mapToSource( const QModelIndex &proxyIndex ) const
{
if ( !proxyIndex.isValid() )
return QModelIndex();
int sourceColumn = mapColumnToSource( proxyIndex.column() );
// For the action column there is no matching column in the source model, just return invalid
if ( sourceColumn == -1 )
return QModelIndex();
return QSortFilterProxyModel::mapToSource( index( proxyIndex.row(), sourceColumn, proxyIndex.parent() ) );
}
QModelIndex QgsAttributeTableFilterModel::mapFromSource( const QModelIndex &sourceIndex ) const
{
const QModelIndex proxyIndex = QSortFilterProxyModel::mapFromSource( sourceIndex );
if ( proxyIndex.column() < 0 )
return QModelIndex();
int col = mapColumnFromSource( proxyIndex.column() );
if ( col == -1 )
col = 0;
return index( proxyIndex.row(), col, proxyIndex.parent() );
}
Qt::ItemFlags QgsAttributeTableFilterModel::flags( const QModelIndex &index ) const
{
// Handle the action column flags here, the master model doesn't know it
if ( mapColumnToSource( index.column() ) == -1 )
return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
const QModelIndex source_index = mapToSource( index );
return masterModel()->flags( source_index );
}
QModelIndex QgsAttributeTableFilterModel::mapToMaster( const QModelIndex &proxyIndex ) const
{
if ( !proxyIndex.isValid() )
return QModelIndex();
int sourceColumn = mapColumnToSource( proxyIndex.column() );
// For the action column there is no matching column in the source model, just return the first one
// so we are still able to query for the feature id, the feature...
if ( sourceColumn == -1 )
sourceColumn = 0;
return QSortFilterProxyModel::mapToSource( index( proxyIndex.row(), sourceColumn, proxyIndex.parent() ) );
}