void QgsComposerAttributeTableV2::setSource( const QgsComposerAttributeTableV2::ContentSource source )
{
if ( source == mSource )
{
return;
}
QgsVectorLayer* prevLayer = sourceLayer();
mSource = source;
QgsVectorLayer* newLayer = sourceLayer();
if ( newLayer != prevLayer )
{
//disconnect from previous layer
if ( prevLayer )
{
disconnect( prevLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
}
//connect to new layer
connect( newLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
if ( mSource == QgsComposerAttributeTableV2::AtlasFeature )
{
mCurrentAtlasLayer = newLayer;
}
//layer has changed as a result of the source change, so reset column list
resetColumns();
}
refreshAttributes();
emit changed();
}
void QgsComposerAttributeTableV2::setRelationId( const QString relationId )
{
if ( relationId == mRelationId )
{
//no change
return;
}
QgsVectorLayer* prevLayer = sourceLayer();
mRelationId = relationId;
QgsRelation relation = QgsProject::instance()->relationManager()->relation( mRelationId );
QgsVectorLayer* newLayer = relation.referencingLayer();
if ( mSource == QgsComposerAttributeTableV2::RelationChildren && newLayer != prevLayer )
{
if ( prevLayer )
{
//disconnect from previous layer
disconnect( prevLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
}
//rebuild column list to match all columns from layer
resetColumns();
//listen for modifications to layer and refresh table when they occur
connect( newLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
}
refreshAttributes();
emit changed();
}
void QgsComposerAttributeTableV2::setVectorLayer( QgsVectorLayer* layer )
{
if ( layer == mVectorLayer )
{
//no change
return;
}
QgsVectorLayer* prevLayer = sourceLayer();
mVectorLayer = layer;
if ( mSource == QgsComposerAttributeTableV2::LayerAttributes && layer != prevLayer )
{
if ( prevLayer )
{
//disconnect from previous layer
disconnect( prevLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
}
//rebuild column list to match all columns from layer
resetColumns();
//listen for modifications to layer and refresh table when they occur
connect( mVectorLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
}
refreshAttributes();
emit changed();
}
void QgsComposerAttributeTableV2::setDisplayedFields( const QStringList& fields, bool refresh )
{
QgsVectorLayer* source = sourceLayer();
if ( !source )
{
return;
}
//rebuild columns list, taking only fields contained in supplied list
qDeleteAll( mColumns );
mColumns.clear();
QgsFields layerFields = source->fields();
if ( !fields.isEmpty() )
{
Q_FOREACH ( const QString& field, fields )
{
int attrIdx = layerFields.lookupField( field );
if ( attrIdx < 0 )
continue;
QString currentAlias = source->attributeDisplayName( attrIdx );
QgsComposerTableColumn* col = new QgsComposerTableColumn;
col->setAttribute( layerFields.at( attrIdx ).name() );
col->setHeading( currentAlias );
mColumns.append( col );
}
void QgsComposerAttributeTableV2::resetColumns()
{
QgsVectorLayer *source = sourceLayer();
if ( !source )
{
return;
}
//remove existing columns
qDeleteAll( mColumns );
mColumns.clear();
//rebuild columns list from vector layer fields
int idx = 0;
const QgsFields sourceFields = source->fields();
for ( const auto &field : sourceFields )
{
QString currentAlias = source->attributeDisplayName( idx );
QgsComposerTableColumn *col = new QgsComposerTableColumn;
col->setAttribute( field.name() );
col->setHeading( currentAlias );
mColumns.append( col );
idx++;
}
}
void QgsComposerAttributeTableV2::setDisplayAttributes( const QSet<int>& attr, bool refresh )
{
QgsVectorLayer* source = sourceLayer();
if ( !source )
{
return;
}
//rebuild columns list, taking only attributes with index in supplied QSet
qDeleteAll( mColumns );
mColumns.clear();
const QgsFields& fields = source->pendingFields();
if ( !attr.empty() )
{
QSet<int>::const_iterator attIt = attr.constBegin();
for ( ; attIt != attr.constEnd(); ++attIt )
{
int attrIdx = ( *attIt );
if ( !fields.exists( attrIdx ) )
{
continue;
}
QString currentAlias = source->attributeDisplayName( attrIdx );
QgsComposerTableColumn* col = new QgsComposerTableColumn;
col->setAttribute( fields[attrIdx].name() );
col->setHeading( currentAlias );
mColumns.append( col );
}
}
else
{
//resetting, so add all attributes to columns
for ( int idx = 0; idx < fields.count(); ++idx )
{
QString currentAlias = source->attributeDisplayName( idx );
QgsComposerTableColumn* col = new QgsComposerTableColumn;
col->setAttribute( fields[idx].name() );
col->setHeading( currentAlias );
mColumns.append( col );
}
}
if ( refresh )
{
refreshAttributes();
}
}
void QgsComposerAttributeTableV2::restoreFieldAliasMap( const QMap<int, QString>& map )
{
QgsVectorLayer* source = sourceLayer();
if ( !source )
{
return;
}
QList<QgsComposerTableColumn*>::const_iterator columnIt = mColumns.constBegin();
for ( ; columnIt != mColumns.constEnd(); ++columnIt )
{
int attrIdx = source->fieldNameIndex(( *columnIt )->attribute() );
if ( map.contains( attrIdx ) )
{
( *columnIt )->setHeading( map.value( attrIdx ) );
}
else
{
( *columnIt )->setHeading( source->attributeDisplayName( attrIdx ) );
}
}
}
bool QgsComposerAttributeTableV2::readXML( const QDomElement& itemElem, const QDomDocument& doc, bool ignoreFrames )
{
if ( itemElem.isNull() )
{
return false;
}
//read general table properties
if ( !QgsComposerTableV2::readXML( itemElem, doc, ignoreFrames ) )
{
return false;
}
QgsVectorLayer* prevLayer = sourceLayer();
if ( prevLayer )
{
//disconnect from previous layer
disconnect( prevLayer, SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
}
mSource = QgsComposerAttributeTableV2::ContentSource( itemElem.attribute( "source", "0" ).toInt() );
mRelationId = itemElem.attribute( "relationId", "" );
if ( mSource == QgsComposerAttributeTableV2::AtlasFeature )
{
mCurrentAtlasLayer = mComposition->atlasComposition().coverageLayer();
}
mShowUniqueRowsOnly = itemElem.attribute( "showUniqueRowsOnly", "0" ).toInt();
mShowOnlyVisibleFeatures = itemElem.attribute( "showOnlyVisibleFeatures", "1" ).toInt();
mFilterToAtlasIntersection = itemElem.attribute( "filterToAtlasIntersection", "0" ).toInt();
mFilterFeatures = itemElem.attribute( "filterFeatures", "false" ) == "true" ? true : false;
mFeatureFilter = itemElem.attribute( "featureFilter", "" );
mMaximumNumberOfFeatures = itemElem.attribute( "maxFeatures", "5" ).toInt();
//composer map
int composerMapId = itemElem.attribute( "composerMap", "-1" ).toInt();
if ( composerMapId == -1 )
{
mComposerMap = 0;
}
if ( composition() )
{
mComposerMap = composition()->getComposerMapById( composerMapId );
}
else
{
mComposerMap = 0;
}
if ( mComposerMap )
{
//if we have found a valid map item, listen out to extent changes on it and refresh the table
connect( mComposerMap, SIGNAL( extentChanged() ), this, SLOT( refreshAttributes() ) );
}
//vector layer
QString layerId = itemElem.attribute( "vectorLayer", "not_existing" );
if ( layerId == "not_existing" )
{
mVectorLayer = 0;
}
else
{
QgsMapLayer* ml = QgsMapLayerRegistry::instance()->mapLayer( layerId );
if ( ml )
{
mVectorLayer = dynamic_cast<QgsVectorLayer*>( ml );
}
}
//connect to new layer
connect( sourceLayer(), SIGNAL( layerModified() ), this, SLOT( refreshAttributes() ) );
refreshAttributes();
emit changed();
return true;
}
bool QgsComposerAttributeTableV2::getTableContents( QgsComposerTableContents &contents )
{
contents.clear();
if (( mSource == QgsComposerAttributeTableV2::AtlasFeature || mSource == QgsComposerAttributeTableV2::RelationChildren )
&& !mComposition->atlasComposition().enabled() )
{
//source mode requires atlas, but atlas disabled
return false;
}
QgsVectorLayer* layer = sourceLayer();
if ( !layer )
{
//no source layer
return false;
}
//prepare filter expression
std::auto_ptr<QgsExpression> filterExpression;
bool activeFilter = false;
if ( mFilterFeatures && !mFeatureFilter.isEmpty() )
{
filterExpression = std::auto_ptr<QgsExpression>( new QgsExpression( mFeatureFilter ) );
if ( !filterExpression->hasParserError() )
{
activeFilter = true;
}
}
QgsRectangle selectionRect;
if ( mComposerMap && mShowOnlyVisibleFeatures )
{
selectionRect = *mComposerMap->currentMapExtent();
if ( layer && mComposition->mapSettings().hasCrsTransformEnabled() )
{
//transform back to layer CRS
QgsCoordinateTransform coordTransform( layer->crs(), mComposition->mapSettings().destinationCrs() );
try
{
selectionRect = coordTransform.transformBoundingBox( selectionRect, QgsCoordinateTransform::ReverseTransform );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
return false;
}
}
}
QgsFeatureRequest req;
if ( mSource == QgsComposerAttributeTableV2::RelationChildren )
{
QgsRelation relation = QgsProject::instance()->relationManager()->relation( mRelationId );
QgsFeature* atlasFeature = mComposition->atlasComposition().currentFeature();
if ( atlasFeature )
{
req = relation.getRelatedFeaturesRequest( *atlasFeature );
}
else
{
//no atlas feature, so empty table
return true;
}
}
if ( !selectionRect.isEmpty() )
req.setFilterRect( selectionRect );
req.setFlags( mShowOnlyVisibleFeatures ? QgsFeatureRequest::ExactIntersect : QgsFeatureRequest::NoFlags );
if ( mSource == QgsComposerAttributeTableV2::AtlasFeature
&& mComposition->atlasComposition().enabled() )
{
//source mode is current atlas feature
QgsFeature* atlasFeature = mComposition->atlasComposition().currentFeature();
if ( atlasFeature )
{
req.setFilterFid( atlasFeature->id() );
}
else
{
//no atlas feature, so empty table
return true;
}
}
QgsFeature f;
int counter = 0;
QgsFeatureIterator fit = layer->getFeatures( req );
while ( fit.nextFeature( f ) && counter < mMaximumNumberOfFeatures )
{
//check feature against filter
if ( activeFilter )
{
QVariant result = filterExpression->evaluate( &f, layer->pendingFields() );
// skip this feature if the filter evaluation is false
if ( !result.toBool() )
{
continue;
}
}
//check against atlas feature intersection
if ( mFilterToAtlasIntersection )
{
if ( !f.geometry() || ! mComposition->atlasComposition().enabled() )
{
continue;
}
QgsFeature* atlasFeature = mComposition->atlasComposition().currentFeature();
if ( !atlasFeature || !atlasFeature->geometry() ||
!f.geometry()->intersects( atlasFeature->geometry() ) )
{
//feature falls outside current atlas feature
continue;
}
}
QgsComposerTableRow currentRow;
QList<QgsComposerTableColumn*>::const_iterator columnIt = mColumns.constBegin();
for ( ; columnIt != mColumns.constEnd(); ++columnIt )
{
int idx = layer->fieldNameIndex(( *columnIt )->attribute() );
if ( idx != -1 )
{
currentRow << f.attributes()[idx];
}
else
{
// Lets assume it's an expression
QgsExpression* expression = new QgsExpression(( *columnIt )->attribute() );
expression->setCurrentRowNumber( counter + 1 );
expression->prepare( layer->pendingFields() );
QVariant value = expression->evaluate( f ) ;
currentRow << value;
}
}
if ( !mShowUniqueRowsOnly || !contentsContainsRow( contents, currentRow ) )
{
contents << currentRow;
++counter;
}
}
//sort the list, starting with the last attribute
QgsComposerAttributeTableCompareV2 c;
QList< QPair<int, bool> > sortColumns = sortAttributes();
for ( int i = sortColumns.size() - 1; i >= 0; --i )
{
c.setSortColumn( sortColumns.at( i ).first );
c.setAscending( sortColumns.at( i ).second );
qStableSort( contents.begin(), contents.end(), c );
}
recalculateTableSize();
return true;
}