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 QgsRelationReferenceWidgetWrapper::initWidget( QWidget *editor )
{
QgsRelationReferenceWidget *w = dynamic_cast<QgsRelationReferenceWidget *>( editor );
if ( !w )
{
w = new QgsRelationReferenceWidget( editor );
}
mWidget = w;
mWidget->setEditorContext( context(), mCanvas, mMessageBar );
bool showForm = config( QStringLiteral( "ShowForm" ), false ).toBool();
bool mapIdent = config( QStringLiteral( "MapIdentification" ), false ).toBool();
bool readOnlyWidget = config( QStringLiteral( "ReadOnly" ), false ).toBool();
bool orderByValue = config( QStringLiteral( "OrderByValue" ), false ).toBool();
bool showOpenFormButton = config( QStringLiteral( "ShowOpenFormButton" ), true ).toBool();
mWidget->setEmbedForm( showForm );
mWidget->setReadOnlySelector( readOnlyWidget );
mWidget->setAllowMapIdentification( mapIdent );
mWidget->setOrderByValue( orderByValue );
mWidget->setOpenFormButtonVisible( showOpenFormButton );
if ( config( QStringLiteral( "FilterFields" ), QVariant() ).isValid() )
{
mWidget->setFilterFields( config( QStringLiteral( "FilterFields" ) ).toStringList() );
mWidget->setChainFilters( config( QStringLiteral( "ChainFilters" ) ).toBool() );
}
mWidget->setAllowAddFeatures( config( QStringLiteral( "AllowAddFeatures" ), false ).toBool() );
const QVariant relationName = config( QStringLiteral( "Relation" ) );
QgsRelation relation; // invalid relation by default
if ( relationName.isValid() )
relation = QgsProject::instance()->relationManager()->relation( relationName.toString() );
else if ( ! layer()->referencingRelations( fieldIdx() ).isEmpty() )
relation = layer()->referencingRelations( fieldIdx() )[0];
// If this widget is already embedded by the same relation, reduce functionality
const QgsAttributeEditorContext *ctx = &context();
do
{
if ( ctx->relation().name() == relation.name() )
{
mWidget->setEmbedForm( false );
mWidget->setReadOnlySelector( false );
mWidget->setAllowMapIdentification( false );
break;
}
ctx = ctx->parentContext();
}
while ( ctx );
mWidget->setRelation( relation, config( QStringLiteral( "AllowNULL" ) ).toBool() );
connect( mWidget, &QgsRelationReferenceWidget::foreignKeyChanged, this, &QgsRelationReferenceWidgetWrapper::foreignKeyChanged );
}
void QgsRelReferenceConfigDlg::on_mComboRelation_indexChanged( int idx )
{
QString relName = mComboRelation->itemData( idx ).toString();
QgsRelation rel = QgsProject::instance()->relationManager()->relation( relName );
QgsVectorLayer* referencedLayer = rel.referencedLayer();
if ( referencedLayer )
{
mTxtDisplayExpression->setText( referencedLayer->displayExpression() );
}
}
void QgsRelReferenceConfigDlg::previewExpressionBuilder()
{
QString relName = mComboRelation->itemData( mComboRelation->currentIndex() ).toString();
QgsRelation relation = QgsProject::instance()->relationManager()->relation( relName );
// Show expression builder
QgsExpressionBuilderDialog dlg( relation.referencedLayer(), mTxtDisplayExpression->text() , this );
dlg.setWindowTitle( tr( "Preview Expression" ) );
if ( dlg.exec() == QDialog::Accepted )
{
mTxtDisplayExpression->setText( dlg.expressionText() );
}
}
void QgsRelationEditorWidget::setRelations( const QgsRelation& relation, const QgsRelation& nmrelation )
{
if ( mRelation.isValid() )
{
disconnect( mRelation.referencingLayer(), SIGNAL( editingStarted() ), this, SLOT( updateButtons() ) );
disconnect( mRelation.referencingLayer(), SIGNAL( editingStopped() ), this, SLOT( updateButtons() ) );
}
if ( mNmRelation.isValid() )
{
disconnect( mNmRelation.referencedLayer(), SIGNAL( editingStarted() ), this, SLOT( updateButtons() ) );
disconnect( mNmRelation.referencedLayer(), SIGNAL( editingStopped() ), this, SLOT( updateButtons() ) );
}
mRelation = relation;
mNmRelation = nmrelation;
if ( !mRelation.isValid() )
return;
connect( mRelation.referencingLayer(), SIGNAL( editingStarted() ), this, SLOT( updateButtons() ) );
connect( mRelation.referencingLayer(), SIGNAL( editingStopped() ), this, SLOT( updateButtons() ) );
if ( mNmRelation.isValid() )
{
connect( mNmRelation.referencingLayer(), SIGNAL( editingStarted() ), this, SLOT( updateButtons() ) );
connect( mNmRelation.referencingLayer(), SIGNAL( editingStopped() ), this, SLOT( updateButtons() ) );
}
setTitle( relation.name() );
QgsVectorLayer* lyr = relation.referencingLayer();
bool canChangeAttributes = lyr->dataProvider()->capabilities() & QgsVectorDataProvider::ChangeAttributeValues;
if ( canChangeAttributes && !lyr->isReadOnly() )
{
mToggleEditingButton->setEnabled( true );
updateButtons();
}
else
{
mToggleEditingButton->setEnabled( false );
}
setObjectName( mRelation.name() );
loadState();
updateUi();
}
void QgsRelationReferenceWidgetWrapper::initWidget( QWidget* editor )
{
QgsRelationReferenceWidget* w = dynamic_cast<QgsRelationReferenceWidget*>( editor );
if ( !w )
{
w = new QgsRelationReferenceWidget( editor );
}
mWidget = w;
mWidget->setEditorContext( context(), mCanvas, mMessageBar );
bool showForm = config( "ShowForm", true ).toBool();
bool mapIdent = config( "MapIdentification", false ).toBool();
bool readOnlyWidget = config( "ReadOnly", false ).toBool();
bool orderByValue = config( "OrderByValue", false ).toBool();
mWidget->setEmbedForm( showForm );
mWidget->setReadOnlySelector( readOnlyWidget );
mWidget->setAllowMapIdentification( mapIdent );
mWidget->setOrderByValue( orderByValue );
if ( config( "FilterFields", QVariant() ).isValid() )
{
mWidget->setFilterFields( config( "FilterFields" ).toStringList() );
mWidget->setChainFilters( config( "ChainFilters" ).toBool() );
}
mWidget->setAllowAddFeatures( config( "AllowAddFeatures", false ).toBool() );
QgsRelation relation = QgsProject::instance()->relationManager()->relation( config( "Relation" ).toString() );
// If this widget is already embedded by the same relation, reduce functionality
const QgsAttributeEditorContext* ctx = &context();
do
{
if ( ctx->relation().name() == relation.name() )
{
mWidget->setEmbedForm( false );
mWidget->setReadOnlySelector( false );
mWidget->setAllowMapIdentification( false );
}
ctx = ctx->parentContext();
}
while ( ctx );
mWidget->setRelation( relation, config( "AllowNULL" ).toBool() );
connect( mWidget, SIGNAL( foreignKeyChanged( QVariant ) ), this, SLOT( foreignKeyChanged( QVariant ) ) );
}
QgsVectorLayer *QgsComposerAttributeTableV2::sourceLayer()
{
switch ( mSource )
{
case QgsComposerAttributeTableV2::AtlasFeature:
return mComposition->atlasComposition().coverageLayer();
case QgsComposerAttributeTableV2::LayerAttributes:
return mVectorLayer;
case QgsComposerAttributeTableV2::RelationChildren:
{
QgsRelation relation = QgsProject::instance()->relationManager()->relation( mRelationId );
return relation.referencingLayer();
}
}
return 0;
}
QgsEditorWidgetConfig QgsRelReferenceConfigDlg::config()
{
QgsEditorWidgetConfig myConfig;
myConfig.insert( "AllowNULL", mCbxAllowNull->isChecked() );
myConfig.insert( "ShowForm", mCbxShowForm->isChecked() );
myConfig.insert( "Relation", mComboRelation->itemData( mComboRelation->currentIndex() ) );
QString relName = mComboRelation->itemData( mComboRelation->currentIndex() ).toString();
QgsRelation relation = QgsProject::instance()->relationManager()->relation( relName );
if ( relation.isValid() )
{
relation.referencedLayer()->setDisplayExpression( mTxtDisplayExpression->text() );
}
return myConfig;
}
QString QgsRelationReferenceFieldFormatter::representValue( QgsVectorLayer* layer, int fieldIndex, const QVariantMap& config, const QVariant& cache, const QVariant& value ) const
{
Q_UNUSED( cache );
// Some sanity checks
if ( !config.contains( QStringLiteral( "Relation" ) ) )
{
QgsMessageLog::logMessage( "Missing Relation in configuration" );
return value.toString();
}
QgsRelation relation = QgsProject::instance()->relationManager()->relation( config[QStringLiteral( "Relation" )].toString() );
if ( !relation.isValid() )
{
QgsMessageLog::logMessage( "Invalid relation" );
return value.toString();
}
QgsVectorLayer* referencingLayer = relation.referencingLayer();
if ( layer != referencingLayer )
{
QgsMessageLog::logMessage( "representValue() with inconsistent layer parameter w.r.t relation referencingLayer" );
return value.toString();
}
int referencingFieldIdx = referencingLayer->fields().lookupField( relation.fieldPairs().at( 0 ).first );
if ( referencingFieldIdx != fieldIndex )
{
QgsMessageLog::logMessage( "representValue() with inconsistent fieldIndex parameter w.r.t relation referencingFieldIdx" );
return value.toString();
}
QgsVectorLayer* referencedLayer = relation.referencedLayer();
if ( !referencedLayer )
{
QgsMessageLog::logMessage( "Cannot find referenced layer" );
return value.toString();
}
// Attributes from the referencing layer
QgsAttributes attrs = QgsAttributes( layer->fields().count() );
// Set the value on the foreign key field of the referencing record
attrs[ referencingFieldIdx ] = value;
QgsFeatureRequest request = relation.getReferencedFeatureRequest( attrs );
QgsFeature feature;
referencedLayer->getFeatures( request ).nextFeature( feature );
if ( !feature.isValid() )
return value.toString();
QgsExpression expr( referencedLayer->displayExpression() );
QgsExpressionContext context;
context << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope()
<< QgsExpressionContextUtils::layerScope( referencedLayer );
context.setFeature( feature );
QString title = expr.evaluate( &context ).toString();
if ( expr.hasEvalError() )
{
int referencedFieldIdx = referencedLayer->fields().lookupField( relation.fieldPairs().at( 0 ).second );
title = feature.attribute( referencedFieldIdx ).toString();
}
return title;
}
void QgsRelationEditorWidget::setRelationFeature( const QgsRelation& relation, const QgsFeature& feature )
{
if ( mRelation.isValid() )
{
disconnect( mRelation.referencingLayer(), SIGNAL( editingStarted() ), this, SLOT( updateButtons() ) );
disconnect( mRelation.referencingLayer(), SIGNAL( editingStopped() ), this, SLOT( updateButtons() ) );
}
mRelation = relation;
mFeature = feature;
connect( mRelation.referencingLayer(), SIGNAL( editingStarted() ), this, SLOT( updateButtons() ) );
connect( mRelation.referencingLayer(), SIGNAL( editingStopped() ), this, SLOT( updateButtons() ) );
setTitle( relation.name() );
QgsVectorLayer* lyr = relation.referencingLayer();
bool canChangeAttributes = lyr->dataProvider()->capabilities() & QgsVectorDataProvider::ChangeAttributeValues;
if ( canChangeAttributes && !lyr->isReadOnly() )
{
mToggleEditingButton->setEnabled( true );
updateButtons();
}
else
{
mToggleEditingButton->setEnabled( false );
}
setObjectName( mRelation.name() );
loadState();
// If not yet initialized, it is not (yet) visible, so we don't load it to be faster (lazy loading)
// If it is already initialized, it has been set visible before and the currently shown feature is changing
// and the widget needs updating
if ( mVisible )
{
QgsFeatureRequest myRequest = mRelation.getRelatedFeaturesRequest( mFeature );
mDualView->init( mRelation.referencingLayer(), nullptr, myRequest, mEditorContext );
}
}
void QgsRelationWidgetWrapper::initWidget( QWidget* editor )
{
QgsRelationEditorWidget* w = dynamic_cast<QgsRelationEditorWidget*>( editor );
// if the editor cannot be cast to relation editor, insert a new one
if ( !w )
{
w = new QgsRelationEditorWidget( editor );
w->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
if ( ! editor->layout() )
{
editor->setLayout( new QGridLayout() );
}
editor->layout()->addWidget( w );
}
QgsAttributeEditorContext myContext( QgsAttributeEditorContext( context(), mRelation, QgsAttributeEditorContext::Multiple, QgsAttributeEditorContext::Embed ) );
w->setEditorContext( myContext );
QgsRelation nmrel = QgsProject::instance()->relationManager()->relation( config( "nm-rel" ).toString() );
// If this widget is already embedded by the same relation, reduce functionality
const QgsAttributeEditorContext* ctx = &context();
do
{
if (( ctx->relation().name() == mRelation.name() && ctx->formMode() == QgsAttributeEditorContext::Embed )
|| ctx->relation().name() == nmrel.name() )
{
w->setVisible( false );
break;
}
ctx = ctx->parentContext();
}
while ( ctx );
w->setRelations( mRelation, nmrel );
mWidget = w;
}
void QgsRelationReferenceWidget::setRelation( const QgsRelation& relation, bool allowNullValue )
{
mAllowNull = allowNullValue;
mRemoveFKButton->setVisible( allowNullValue && mReadOnlySelector );
if ( relation.isValid() )
{
mInvalidLabel->hide();
mRelation = relation;
mReferencingLayer = relation.referencingLayer();
mRelationName = relation.name();
mReferencedLayer = relation.referencedLayer();
mFkeyFieldIdx = mReferencedLayer->fieldNameIndex( relation.fieldPairs().first().second );
QgsAttributeEditorContext context( mEditorContext, relation, QgsAttributeEditorContext::Single, QgsAttributeEditorContext::Embed );
if ( mEmbedForm )
{
mAttributeEditorFrame->setTitle( mReferencedLayer->name() );
mReferencedAttributeForm = new QgsAttributeForm( relation.referencedLayer(), QgsFeature(), context, this );
mReferencedAttributeForm->hideButtonBox();
mAttributeEditorLayout->addWidget( mReferencedAttributeForm );
}
}
else
{
mInvalidLabel->show();
}
if ( mShown && isVisible() )
{
init();
}
}
void QgsRelationReferenceWidget::setRelation( const QgsRelation &relation, bool allowNullValue )
{
mAllowNull = allowNullValue;
mRemoveFKButton->setVisible( allowNullValue && mReadOnlySelector );
if ( relation.isValid() )
{
mInvalidLabel->hide();
mRelation = relation;
mReferencingLayer = relation.referencingLayer();
mRelationName = relation.name();
mReferencedLayer = relation.referencedLayer();
mReferencedField = relation.fieldPairs().at( 0 ).second;
if ( mComboBox )
mComboBox->setIdentifierField( mReferencedField );
mReferencedFieldIdx = mReferencedLayer->fields().lookupField( relation.fieldPairs().at( 0 ).second );
mReferencingFieldIdx = mReferencingLayer->fields().lookupField( relation.fieldPairs().at( 0 ).first );
mAttributeEditorFrame->setObjectName( QStringLiteral( "referencing/" ) + relation.name() );
if ( mEmbedForm )
{
QgsAttributeEditorContext context( mEditorContext, relation, QgsAttributeEditorContext::Single, QgsAttributeEditorContext::Embed );
mAttributeEditorFrame->setTitle( mReferencedLayer->name() );
mReferencedAttributeForm = new QgsAttributeForm( relation.referencedLayer(), QgsFeature(), context, this );
mAttributeEditorLayout->addWidget( mReferencedAttributeForm );
}
connect( mReferencedLayer, &QgsVectorLayer::editingStarted, this, &QgsRelationReferenceWidget::updateAddEntryButton );
connect( mReferencedLayer, &QgsVectorLayer::editingStopped, this, &QgsRelationReferenceWidget::updateAddEntryButton );
updateAddEntryButton();
}
else
{
mInvalidLabel->show();
}
if ( mShown && isVisible() )
{
init();
}
}
void QgsRelationEditorWidget::setRelations( const QgsRelation &relation, const QgsRelation &nmrelation )
{
if ( mRelation.isValid() )
{
disconnect( mRelation.referencingLayer(), &QgsVectorLayer::editingStarted, this, &QgsRelationEditorWidget::updateButtons );
disconnect( mRelation.referencingLayer(), &QgsVectorLayer::editingStopped, this, &QgsRelationEditorWidget::updateButtons );
}
if ( mNmRelation.isValid() )
{
disconnect( mNmRelation.referencedLayer(), &QgsVectorLayer::editingStarted, this, &QgsRelationEditorWidget::updateButtons );
disconnect( mNmRelation.referencedLayer(), &QgsVectorLayer::editingStopped, this, &QgsRelationEditorWidget::updateButtons );
}
mRelation = relation;
mNmRelation = nmrelation;
if ( !mRelation.isValid() )
return;
mToggleEditingButton->setVisible( true );
const auto transactionGroups = QgsProject::instance()->transactionGroups();
for ( auto it = transactionGroups.constBegin(); it != transactionGroups.constEnd(); ++it )
{
if ( it.value()->layers().contains( mRelation.referencingLayer() ) )
{
mToggleEditingButton->setVisible( false );
mSaveEditsButton->setVisible( false );
}
}
connect( mRelation.referencingLayer(), &QgsVectorLayer::editingStarted, this, &QgsRelationEditorWidget::updateButtons );
connect( mRelation.referencingLayer(), &QgsVectorLayer::editingStopped, this, &QgsRelationEditorWidget::updateButtons );
if ( mNmRelation.isValid() )
{
connect( mNmRelation.referencedLayer(), &QgsVectorLayer::editingStarted, this, &QgsRelationEditorWidget::updateButtons );
connect( mNmRelation.referencedLayer(), &QgsVectorLayer::editingStopped, this, &QgsRelationEditorWidget::updateButtons );
}
setTitle( relation.name() );
QgsVectorLayer *lyr = relation.referencingLayer();
bool canChangeAttributes = lyr->dataProvider()->capabilities() & QgsVectorDataProvider::ChangeAttributeValues;
if ( canChangeAttributes && !lyr->readOnly() )
{
mToggleEditingButton->setEnabled( true );
updateButtons();
}
else
{
mToggleEditingButton->setEnabled( false );
}
if ( mNmRelation.isValid() )
mZoomToFeatureButton->setVisible( mNmRelation.referencedLayer()->isSpatial() );
else
mZoomToFeatureButton->setVisible( mRelation.referencingLayer()->isSpatial() );
setObjectName( QStringLiteral( "referenced/" ) + mRelation.name() );
updateUi();
}
QgsRelation QgsRelation::createFromXml( const QDomNode &node )
{
QDomElement elem = node.toElement();
if ( elem.tagName() != "relation" )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Cannot create relation. Unexpected tag '%1'" ).arg( elem.tagName() ) );
}
QgsRelation relation;
QString referencingLayerId = elem.attribute( "referencingLayer" );
QString referencedLayerId = elem.attribute( "referencedLayer" );
QString id = elem.attribute( "id" );
QString name = elem.attribute( "name" );
const QMap<QString, QgsMapLayer*>& mapLayers = QgsMapLayerRegistry::instance()->mapLayers();
QgsMapLayer* referencingLayer = mapLayers[referencingLayerId];
QgsMapLayer* referencedLayer = mapLayers[referencedLayerId];
if ( !referencingLayer )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which does not exist." ).arg( referencingLayerId ) );
}
else if ( QgsMapLayer::VectorLayer != referencingLayer->type() )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which is not of type VectorLayer." ).arg( referencingLayerId ) );
}
if ( !referencedLayer )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which does not exist." ).arg( referencedLayerId ) );
}
else if ( QgsMapLayer::VectorLayer != referencedLayer->type() )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which is not of type VectorLayer." ).arg( referencedLayerId ) );
}
relation.mReferencingLayerId = referencingLayerId;
relation.mReferencingLayer = qobject_cast<QgsVectorLayer*>( referencingLayer );
relation.mReferencedLayerId = referencedLayerId;
relation.mReferencedLayer = qobject_cast<QgsVectorLayer*>( referencedLayer );
relation.mRelationId = id;
relation.mRelationName = name;
QDomNodeList references = elem.elementsByTagName( "fieldRef" );
for ( int i = 0; i < references.size(); ++i )
{
QDomElement refEl = references.at( i ).toElement();
QString referencingField = refEl.attribute( "referencingField" );
QString referencedField = refEl.attribute( "referencedField" );
relation.addFieldPair( referencingField, referencedField );
}
relation.updateRelationStatus();
return relation;
}
QgsRelation QgsRelation::createFromXml( const QDomNode &node, QgsReadWriteContext &context )
{
QDomElement elem = node.toElement();
if ( elem.tagName() != QLatin1String( "relation" ) )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Cannot create relation. Unexpected tag '%1'" ).arg( elem.tagName() ) );
}
QgsRelation relation;
QString referencingLayerId = elem.attribute( QStringLiteral( "referencingLayer" ) );
QString referencedLayerId = elem.attribute( QStringLiteral( "referencedLayer" ) );
QString id = elem.attribute( QStringLiteral( "id" ) );
QString name = context.projectTranslator()->translate( QStringLiteral( "project:relations" ), elem.attribute( QStringLiteral( "name" ) ) );
QString strength = elem.attribute( QStringLiteral( "strength" ) );
const QMap<QString, QgsMapLayer *> &mapLayers = QgsProject::instance()->mapLayers();
QgsMapLayer *referencingLayer = mapLayers[referencingLayerId];
QgsMapLayer *referencedLayer = mapLayers[referencedLayerId];
if ( !referencingLayer )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which does not exist." ).arg( referencingLayerId ) );
}
else if ( QgsMapLayer::VectorLayer != referencingLayer->type() )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which is not of type VectorLayer." ).arg( referencingLayerId ) );
}
if ( !referencedLayer )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which does not exist." ).arg( referencedLayerId ) );
}
else if ( QgsMapLayer::VectorLayer != referencedLayer->type() )
{
QgsLogger::warning( QApplication::translate( "QgsRelation", "Relation defined for layer '%1' which is not of type VectorLayer." ).arg( referencedLayerId ) );
}
relation.d->mReferencingLayerId = referencingLayerId;
relation.d->mReferencingLayer = qobject_cast<QgsVectorLayer *>( referencingLayer );
relation.d->mReferencedLayerId = referencedLayerId;
relation.d->mReferencedLayer = qobject_cast<QgsVectorLayer *>( referencedLayer );
relation.d->mRelationId = id;
relation.d->mRelationName = name;
if ( strength == QLatin1String( "Composition" ) )
{
relation.d->mRelationStrength = RelationStrength::Composition;
}
else
{
relation.d->mRelationStrength = RelationStrength::Association;
}
QDomNodeList references = elem.elementsByTagName( QStringLiteral( "fieldRef" ) );
for ( int i = 0; i < references.size(); ++i )
{
QDomElement refEl = references.at( i ).toElement();
QString referencingField = refEl.attribute( QStringLiteral( "referencingField" ) );
QString referencedField = refEl.attribute( QStringLiteral( "referencedField" ) );
relation.addFieldPair( referencingField, referencedField );
}
relation.updateRelationStatus();
return relation;
}
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;
}