void QgsComposerAttributeTableV2::setRelationId( const QString& relationId )
{
if ( relationId == mRelationId )
{
//no change
return;
}
QgsVectorLayer* prevLayer = sourceLayer();
mRelationId = relationId;
QgsRelation relation = mComposition->project()->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 QgsRelationReferenceWidget::setRelation( 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();
}
}
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::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();
}
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;
}
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::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 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();
mReferencedFieldIdx = mReferencedLayer->fieldNameIndex( relation.fieldPairs().at( 0 ).second );
mReferencingFieldIdx = mReferencingLayer->fieldNameIndex( relation.fieldPairs().at( 0 ).first );
QgsAttributeEditorContext context( mEditorContext, relation, QgsAttributeEditorContext::Single, QgsAttributeEditorContext::Embed );
if ( mEmbedForm )
{
mAttributeEditorFrame->setTitle( mReferencedLayer->name() );
mReferencedAttributeForm = new QgsAttributeForm( relation.referencedLayer(), QgsFeature(), context, this );
mAttributeEditorLayout->addWidget( mReferencedAttributeForm );
}
connect( mReferencedLayer, SIGNAL( editingStarted() ), this, SLOT( updateAddEntryButton() ) );
connect( mReferencedLayer, SIGNAL( editingStopped() ), this, SLOT( 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();
}
