void QgsRelationReferenceWidget::setForeignKey( const QVariant& value )
{
if ( !value.isValid() || value.isNull() )
{
deleteForeignKey();
return;
}
QgsFeature f;
if ( !mReferencedLayer )
return;
// TODO: Rewrite using expression
QgsFeatureIterator fit = mReferencedLayer->getFeatures( QgsFeatureRequest() );
while ( fit.nextFeature( f ) )
{
if ( f.attribute( mFkeyFieldIdx ) == value )
{
break;
}
}
if ( !f.isValid() )
{
deleteForeignKey();
return;
}
mForeignKey = f.attribute( mFkeyFieldIdx );
if ( mReadOnlySelector )
{
QgsExpression expr( mReferencedLayer->displayExpression() );
QString title = expr.evaluate( &f ).toString();
if ( expr.hasEvalError() )
{
title = f.attribute( mFkeyFieldIdx ).toString();
}
mLineEdit->setText( title );
mFeatureId = f.id();
}
else
{
int i = mComboBox->findData( value );
if ( i == -1 && mAllowNull )
{
mComboBox->setCurrentIndex( 0 );
}
else
{
mComboBox->setCurrentIndex( i );
}
}
mRemoveFKButton->setEnabled( mIsEditable );
highlightFeature( f );
updateAttributeEditorFrame( f );
emit foreignKeyChanged( foreignKey() );
}
void QgsRelationReferenceWidget::setForeignKey( const QVariant& value )
{
if ( !value.isValid() || value.isNull() )
{
deleteForeignKey();
return;
}
if ( !mReferencedLayer )
return;
QgsAttributes attrs = QgsAttributes( mReferencingLayer->fields().count() );
attrs[mFkeyFieldIdx] = value;
QgsFeatureRequest request = mRelation.getReferencedFeatureRequest( attrs );
mReferencedLayer->getFeatures( request ).nextFeature( mFeature );
if ( !mFeature.isValid() )
{
deleteForeignKey();
return;
}
mForeignKey = mFeature.attribute( mFkeyFieldIdx );
if ( mReadOnlySelector )
{
QgsExpression expr( mReferencedLayer->displayExpression() );
QgsExpressionContext context;
context << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope()
<< QgsExpressionContextUtils::layerScope( mReferencedLayer );
context.setFeature( mFeature );
QString title = expr.evaluate( &context ).toString();
if ( expr.hasEvalError() )
{
title = mFeature.attribute( mFkeyFieldIdx ).toString();
}
mLineEdit->setText( title );
}
else
{
int i = mComboBox->findData( mFeature.id(), QgsAttributeTableModel::FeatureIdRole );
if ( i == -1 && mAllowNull )
{
mComboBox->setCurrentIndex( 0 );
}
else
{
mComboBox->setCurrentIndex( i );
}
}
mRemoveFKButton->setEnabled( mIsEditable );
highlightFeature( mFeature );
updateAttributeEditorFrame( mFeature );
emit foreignKeyChanged( foreignKey() );
}
QgsRelationReferenceWidget::QgsRelationReferenceWidget( QWidget* parent )
: QWidget( parent )
, mEditorContext( QgsAttributeEditorContext() )
, mCanvas( NULL )
, mMessageBar( NULL )
, mForeignKey( QVariant() )
, mFkeyFieldIdx( -1 )
, mAllowNull( true )
, mHighlight( NULL )
, mMapTool( NULL )
, mMessageBarItem( NULL )
, mRelationName( "" )
, mReferencedAttributeForm( NULL )
, mReferencedLayer( NULL )
, mReferencingLayer( NULL )
, mMasterModel( 0 )
, mFilterModel( 0 )
, mFeatureListModel( 0 )
, mWindowWidget( NULL )
, mShown( false )
, mIsEditable( true )
, mEmbedForm( false )
, mReadOnlySelector( false )
, mAllowMapIdentification( false )
, mOrderByValue( false )
, mOpenFormButtonVisible( true )
, mChainFilters( false )
{
mTopLayout = new QVBoxLayout( this );
mTopLayout->setContentsMargins( 0, 0, 0, 0 );
mTopLayout->setAlignment( Qt::AlignTop );
setLayout( mTopLayout );
QHBoxLayout* editLayout = new QHBoxLayout();
editLayout->setContentsMargins( 0, 0, 0, 0 );
editLayout->setSpacing( 2 );
// Prepare the container and layout for the filter comboboxes
mChooserContainer = new QWidget;
editLayout->addWidget( mChooserContainer );
QHBoxLayout* chooserLayout = new QHBoxLayout;
chooserLayout->setContentsMargins( 0, 0, 0, 0 );
mFilterLayout = new QHBoxLayout;
mFilterLayout->setContentsMargins( 0, 0, 0, 0 );
mFilterContainer = new QWidget;
mFilterContainer->setLayout( mFilterLayout );
mChooserContainer->setLayout( chooserLayout );
chooserLayout->addWidget( mFilterContainer );
// combobox (for non-geometric relation)
mComboBox = new QComboBox( this );
mChooserContainer->layout()->addWidget( mComboBox );
// read-only line edit
mLineEdit = new QLineEdit( this );
mLineEdit->setReadOnly( true );
editLayout->addWidget( mLineEdit );
// open form button
mOpenFormButton = new QToolButton( this );
mOpenFormButton->setIcon( QgsApplication::getThemeIcon( "/mActionPropertyItem.png" ) );
mOpenFormButton->setText( tr( "Open related feature form" ) );
editLayout->addWidget( mOpenFormButton );
// highlight button
mHighlightFeatureButton = new QToolButton( this );
mHighlightFeatureButton->setPopupMode( QToolButton::MenuButtonPopup );
mHighlightFeatureAction = new QAction( QgsApplication::getThemeIcon( "/mActionHighlightFeature.svg" ), tr( "Highlight feature" ), this );
mScaleHighlightFeatureAction = new QAction( QgsApplication::getThemeIcon( "/mActionScaleHighlightFeature.svg" ), tr( "Scale and highlight feature" ), this );
mPanHighlightFeatureAction = new QAction( QgsApplication::getThemeIcon( "/mActionPanHighlightFeature.svg" ), tr( "Pan and highlight feature" ), this );
mHighlightFeatureButton->addAction( mHighlightFeatureAction );
mHighlightFeatureButton->addAction( mScaleHighlightFeatureAction );
mHighlightFeatureButton->addAction( mPanHighlightFeatureAction );
mHighlightFeatureButton->setDefaultAction( mHighlightFeatureAction );
editLayout->addWidget( mHighlightFeatureButton );
// map identification button
mMapIdentificationButton = new QToolButton( this );
mMapIdentificationButton->setIcon( QgsApplication::getThemeIcon( "/mActionMapIdentification.svg" ) );
mMapIdentificationButton->setText( tr( "Select on map" ) );
mMapIdentificationButton->setCheckable( true );
editLayout->addWidget( mMapIdentificationButton );
// remove foreign key button
mRemoveFKButton = new QToolButton( this );
mRemoveFKButton->setIcon( QgsApplication::getThemeIcon( "/mActionRemove.svg" ) );
mRemoveFKButton->setText( tr( "No selection" ) );
editLayout->addWidget( mRemoveFKButton );
// spacer
editLayout->addItem( new QSpacerItem( 0, 0, QSizePolicy::Expanding ) );
// add line to top layout
mTopLayout->addLayout( editLayout );
// embed form
mAttributeEditorFrame = new QgsCollapsibleGroupBox( this );
mAttributeEditorLayout = new QVBoxLayout( mAttributeEditorFrame );
mAttributeEditorFrame->setLayout( mAttributeEditorLayout );
mAttributeEditorFrame->setSizePolicy( mAttributeEditorFrame->sizePolicy().horizontalPolicy(), QSizePolicy::Expanding );
mTopLayout->addWidget( mAttributeEditorFrame );
// invalid label
mInvalidLabel = new QLabel( tr( "The relation is not valid. Please make sure your relation definitions are ok." ) );
mInvalidLabel->setWordWrap( true );
QFont font = mInvalidLabel->font();
font.setItalic( true );
mInvalidLabel->setStyleSheet( "QLabel { color: red; } " );
mInvalidLabel->setFont( font );
mTopLayout->addWidget( mInvalidLabel );
// default mode is combobox, no geometric relation and no embed form
mLineEdit->hide();
mMapIdentificationButton->hide();
mHighlightFeatureButton->hide();
mAttributeEditorFrame->hide();
mInvalidLabel->hide();
// connect buttons
connect( mOpenFormButton, SIGNAL( clicked() ), this, SLOT( openForm() ) );
connect( mHighlightFeatureButton, SIGNAL( triggered( QAction* ) ), this, SLOT( highlightActionTriggered( QAction* ) ) );
connect( mMapIdentificationButton, SIGNAL( clicked() ), this, SLOT( mapIdentification() ) );
connect( mRemoveFKButton, SIGNAL( clicked() ), this, SLOT( deleteForeignKey() ) );
}
void QgsRelationReferenceWidget::setForeignKey( const QVariant &value )
{
if ( !value.isValid() )
{
return;
}
if ( value.isNull() )
{
deleteForeignKey();
return;
}
if ( !mReferencedLayer )
return;
if ( mReadOnlySelector )
{
// Attributes from the referencing layer
QgsAttributes attrs = QgsAttributes( mReferencingLayer->fields().count() );
// Set the value on the foreign key field of the referencing record
attrs[ mReferencingLayer->fields().lookupField( mRelation.fieldPairs().at( 0 ).first )] = value;
QgsFeatureRequest request = mRelation.getReferencedFeatureRequest( attrs );
mReferencedLayer->getFeatures( request ).nextFeature( mFeature );
if ( !mFeature.isValid() )
{
return;
}
mForeignKey = mFeature.attribute( mReferencedFieldIdx );
QgsExpression expr( mReferencedLayer->displayExpression() );
QgsExpressionContext context( QgsExpressionContextUtils::globalProjectLayerScopes( mReferencedLayer ) );
context.setFeature( mFeature );
QString title = expr.evaluate( &context ).toString();
if ( expr.hasEvalError() )
{
title = mFeature.attribute( mReferencedFieldIdx ).toString();
}
mLineEdit->setText( title );
}
else
{
mComboBox->setIdentifierValue( value );
if ( mChainFilters )
{
QVariant nullValue = QgsApplication::nullRepresentation();
QgsFeatureRequest request = mComboBox->currentFeatureRequest();
mReferencedLayer->getFeatures( request ).nextFeature( mFeature );
const int count = std::min( mFilterComboBoxes.size(), mFilterFields.size() );
for ( int i = 0; i < count; i++ )
{
QVariant v = mFeature.attribute( mFilterFields[i] );
QString f = v.isNull() ? nullValue.toString() : v.toString();
mFilterComboBoxes.at( i )->setCurrentIndex( mFilterComboBoxes.at( i )->findText( f ) );
}
}
}
mRemoveFKButton->setEnabled( mIsEditable );
highlightFeature( mFeature ); // TODO : make this async
updateAttributeEditorFrame( mFeature );
emitForeignKeyChanged( foreignKey() );
}