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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 "qgis.h"
#include "qgsattributetablefiltermodel.h"
#include "qgsattributetablemodel.h"
#include "qgsvectorlayer.h"
#include "qgsfeature.h"
#include "qgsmapcanvas.h"
#include "qgslogger.h"
#include "qgsrendererv2.h"
#include "qgsvectorlayereditbuffer.h"
//////////////////
// Filter Model //
//////////////////
QgsAttributeTableFilterModel::QgsAttributeTableFilterModel( QgsMapCanvas* canvas, QgsAttributeTableModel* sourceModel, QObject* parent )
: QSortFilterProxyModel( parent )
, mCanvas( canvas )
, mFilterMode( ShowAll )
, mSelectedOnTop( false )
{
setSourceModel( sourceModel );
setDynamicSortFilter( true );
setSortRole( QgsAttributeTableModel::SortRole );
connect( layer(), SIGNAL( selectionChanged() ), SLOT( selectionChanged() ) );
}
bool QgsAttributeTableFilterModel::lessThan( const QModelIndex &left, const QModelIndex &right ) const
{
if ( mSelectedOnTop )
{
bool leftSelected = layer()->selectedFeaturesIds().contains( masterModel()->rowToId( left.row() ) );
bool rightSelected = layer()->selectedFeaturesIds().contains( masterModel()->rowToId( right.row() ) );
if ( leftSelected && !rightSelected )
{
return sortOrder() == Qt::AscendingOrder;
}
else if ( rightSelected && !leftSelected )
{
return sortOrder() == Qt::DescendingOrder;
}
}
return qgsVariantLessThan( left.data( QgsAttributeTableModel::SortRole ),
right.data( QgsAttributeTableModel::SortRole ) );
}
void QgsAttributeTableFilterModel::sort( int column, Qt::SortOrder order )
{
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 == TypeRole )
return ColumnTypeActionButton;
else if ( role == QgsAttributeTableModel::FeatureIdRole )
{
QModelIndex fieldIndex = QSortFilterProxyModel::mapToSource( QSortFilterProxyModel::index( index.row(), 0, index.parent() ) );
return sourceModel()->data( fieldIndex, QgsAttributeTableModel::FeatureIdRole );
}
}
else if ( role == TypeRole )
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
return QSortFilterProxyModel::headerData( section, orientation, role );
}
else
{
if ( role == Qt::DisplayRole )
return section + 1;
else
{
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 )
{
mConfig = config;
mConfig.update( layer()->fields() );
QVector<int> newColumnMapping;
Q_FOREACH ( const QgsAttributeTableConfig::ColumnConfig& columnConfig, mConfig.columns() )
{
// Hidden? Forget about this column
if ( columnConfig.hidden )
continue;
// The new value for the mapping (field index or -1 for action column)
int newValue = ( columnConfig.type == QgsAttributeTableConfig::Action ) ? -1 : layer()->fieldNameIndex( 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 < qMin( 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 )
{
beginRemoveColumns( QModelIndex(), firstRemovedColumn, firstRemovedColumn + removedColumnCount );
mColumnMapping = newColumnMapping;
endRemoveColumns();
}
else
{
requiresReset = true;
}
}
if ( requiresReset )
{
beginResetModel();
mColumnMapping = newColumnMapping;
endResetModel();
}
}
sort( config.sortExpression() );
}
void QgsAttributeTableFilterModel::sort( QString expression, Qt::SortOrder order )
{
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;
if ( sortColumn() == -1 )
{
sort( 0 );
}
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( sourceModel, SIGNAL( columnsAboutToBeInserted( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsAboutToBeInserted( QModelIndex, int, int ) ) );
disconnect( sourceModel, SIGNAL( columnsInserted( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsInserted( QModelIndex, int, int ) ) );
disconnect( sourceModel, SIGNAL( columnsAboutToBeRemoved( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsAboutToBeRemoved( QModelIndex, int, int ) ) );
disconnect( sourceModel, SIGNAL( columnsRemoved( QModelIndex, int, int ) ), this, SLOT( _q_sourceColumnsRemoved( QModelIndex, int, int ) ) );
connect( mTableModel, SIGNAL( columnsAboutToBeInserted( QModelIndex, int, int ) ), this, SLOT( onColumnsChanged() ) );
connect( mTableModel, SIGNAL( columnsAboutToBeRemoved( QModelIndex, int, int ) ), this, SLOT( onColumnsChanged() ) );
}
bool QgsAttributeTableFilterModel::selectedOnTop()
{
return mSelectedOnTop;
}
void QgsAttributeTableFilterModel::setFilteredFeatures( const QgsFeatureIds& ids )
{
mFilteredFeatures = ids;
setFilterMode( ShowFilteredList );
invalidateFilter();
}
QgsFeatureIds QgsAttributeTableFilterModel::filteredFeatures()
{
QgsFeatureIds ids;
for ( int i = 0; i < rowCount(); ++i )
{
QModelIndex row = index( i, 0 );
ids << rowToId( row );
}
return ids;
}
void QgsAttributeTableFilterModel::setFilterMode( FilterMode filterMode )
{
if ( filterMode != mFilterMode )
{
if ( filterMode == ShowVisible )
{
connect( mCanvas, SIGNAL( extentsChanged() ), this, SLOT( extentsChanged() ) );
generateListOfVisibleFeatures();
}
else
{
disconnect( mCanvas, SIGNAL( extentsChanged() ), this, SLOT( extentsChanged() ) );
}
if ( filterMode == ShowSelected )
{
generateListOfVisibleFeatures();
}
mFilterMode = filterMode;
invalidateFilter();
}
}
bool QgsAttributeTableFilterModel::filterAcceptsRow( int sourceRow, const QModelIndex &sourceParent ) const
{
Q_UNUSED( sourceParent );
switch ( mFilterMode )
{
case ShowAll:
return true;
case ShowFilteredList:
return mFilteredFeatures.contains( masterModel()->rowToId( sourceRow ) );
case ShowSelected:
return layer()->selectedFeaturesIds().isEmpty() || layer()->selectedFeaturesIds().contains( masterModel()->rowToId( sourceRow ) );
case ShowVisible:
return mFilteredFeatures.contains( masterModel()->rowToId( sourceRow ) );
case ShowEdited:
{
QgsVectorLayerEditBuffer* editBuffer = layer()->editBuffer();
if ( editBuffer )
{
const QList<QgsFeatureId> addedFeatures = editBuffer->addedFeatures().keys();
const QList<QgsFeatureId> changedFeatures = editBuffer->changedAttributeValues().keys();
const QList<QgsFeatureId> changedGeometries = editBuffer->changedGeometries().keys();
const QgsFeatureId fid = masterModel()->rowToId( sourceRow );
return addedFeatures.contains( fid ) || changedFeatures.contains( fid ) || changedGeometries.contains( fid );
}
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()
{
generateListOfVisibleFeatures();
invalidateFilter();
}
void QgsAttributeTableFilterModel::selectionChanged()
{
if ( ShowSelected == mFilterMode )
{
generateListOfVisibleFeatures();
invalidateFilter();
}
else if ( mSelectedOnTop )
{
sort( sortColumn(), sortOrder() );
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 );
}
void QgsAttributeTableFilterModel::generateListOfVisibleFeatures()
{
if ( !layer() )
return;
bool filter = false;
QgsRectangle rect = mCanvas->mapSettings().mapToLayerCoordinates( layer(), mCanvas->extent() );
QgsRenderContext renderContext;
renderContext.expressionContext() << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope()
<< QgsExpressionContextUtils::layerScope( layer() );
QgsFeatureRendererV2* renderer = layer()->rendererV2();
mFilteredFeatures.clear();
if ( !renderer )
{
QgsDebugMsg( "Cannot get renderer" );
return;
}
const QgsMapSettings& ms = mCanvas->mapSettings();
if ( !layer()->isInScaleRange( ms.scale() ) )
{
QgsDebugMsg( "Out of scale limits" );
}
else
{
if ( renderer && renderer->capabilities() & QgsFeatureRendererV2::ScaleDependent )
{
// setup scale
// mapRenderer()->renderContext()->scale is not automaticaly 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 && renderer->capabilities() & QgsFeatureRendererV2::Filter;
}
renderer->startRender( renderContext, layer()->fields() );
QgsFeatureRequest r( masterModel()->request() );
if ( !r.filterRect().isNull() )
{
r.setFilterRect( r.filterRect().intersect( &rect ) );
}
else
{
r.setFilterRect( rect );
}
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 && renderer->capabilities() & QgsFeatureRendererV2::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;
Q_FOREACH ( const QModelIndex& idx, masterModel()->idToIndexList( fid ) )
{
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 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() ) );
}
QModelIndex QgsAttributeTableFilterModel::mapFromSource( const QModelIndex& sourceIndex ) const
{
QModelIndex proxyIndex = QSortFilterProxyModel::mapFromSource( sourceIndex );
if ( proxyIndex.column() < 0 )
return QModelIndex();
return index( proxyIndex.row(), mapColumnToSource( proxyIndex.column() ), 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;
QModelIndex source_index = mapToSource( index );
return masterModel()->flags( source_index );
}