void test_from_ogc_filter()
{
QFETCH( QString, xmlText );
QFETCH( QString, dumpText );
QDomDocument doc;
QVERIFY(doc.setContent(xmlText, true));
QDomElement rootElem = doc.documentElement();
QgsExpression* expr = QgsExpression::createFromOgcFilter( rootElem );
QVERIFY( expr );
qDebug("OGC XML : %s", xmlText.toAscii().data() );
qDebug("EXPR-DUMP: %s", expr->dump().toAscii().data() );
if ( expr->hasParserError() )
qDebug( "ERROR: %s ", expr->parserErrorString().toAscii().data() );
QVERIFY( !expr->hasParserError() );
QCOMPARE( dumpText, expr->dump() );
delete expr;
}
void QgsAttributeTypeDialog::defaultExpressionChanged()
{
QString expression = mExpressionWidget->expression();
if ( expression.isEmpty() )
{
mDefaultPreviewLabel->setText( QString() );
return;
}
QgsExpressionContext context = mLayer->createExpressionContext();
if ( !mPreviewFeature.isValid() )
{
// get first feature
QgsFeatureIterator it = mLayer->getFeatures( QgsFeatureRequest().setLimit( 1 ) );
it.nextFeature( mPreviewFeature );
}
context.setFeature( mPreviewFeature );
QgsExpression exp = QgsExpression( expression );
exp.prepare( &context );
if ( exp.hasParserError() )
{
mDefaultPreviewLabel->setText( "<i>" + exp.parserErrorString() + "</i>" );
return;
}
QVariant val = exp.evaluate( &context );
if ( exp.hasEvalError() )
{
mDefaultPreviewLabel->setText( "<i>" + exp.evalErrorString() + "</i>" );
return;
}
QString previewText = val.toString();
QgsEditorWidgetFactory *factory = QgsEditorWidgetRegistry::instance()->factory( editorWidgetType() );
if ( factory )
{
previewText = factory->representValue( mLayer, mFieldIdx, editorWidgetConfig(), QVariant(), val );
}
mDefaultPreviewLabel->setText( "<i>" + previewText + "</i>" );
}
bool QgsFeatureListModel::setDisplayExpression( const QString expression )
{
const QgsFields fields = mFilterModel->layer()->dataProvider()->fields();
QgsExpression* exp = new QgsExpression( expression );
exp->prepare( fields );
if ( exp->hasParserError() )
{
mParserErrorString = exp->parserErrorString();
delete exp;
return false;
}
delete mExpression;
mExpression = exp;
emit( dataChanged( index( 0, 0 ), index( rowCount() - 1, 0 ) ) );
return true;
}
bool QgsFeatureListModel::setDisplayExpression( const QString& expression )
{
QgsExpression* exp = new QgsExpression( expression );
QgsExpressionContext context;
context << QgsExpressionContextUtils::globalScope()
<< QgsExpressionContextUtils::projectScope()
<< QgsExpressionContextUtils::layerScope( mFilterModel->layer() );
exp->prepare( &context );
if ( exp->hasParserError() )
{
mParserErrorString = exp->parserErrorString();
delete exp;
return false;
}
delete mExpression;
mExpression = exp;
emit dataChanged( index( 0, 0 ), index( rowCount() - 1, 0 ) );
return true;
}
void QgsAttributeTableModel::loadAttributes()
{
if ( !layer() )
{
return;
}
bool ins = false, rm = false;
QgsAttributeList attributes;
const QgsFields& fields = layer()->pendingFields();
for ( int idx = 0; idx < fields.count(); ++idx )
{
switch ( layer()->editType( idx ) )
{
case QgsVectorLayer::Hidden:
continue;
case QgsVectorLayer::ValueMap:
mValueMaps.insert( idx, new QMap< QString, QVariant >( layer()->valueMap( idx ) ) );
break;
case QgsVectorLayer::ValueRelation:
{
const QgsVectorLayer::ValueRelationData &data = layer()->valueRelation( idx );
QgsVectorLayer *layer = qobject_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer( data.mLayer ) );
if ( !layer )
continue;
int ki = layer->fieldNameIndex( data.mKey );
int vi = layer->fieldNameIndex( data.mValue );
QgsExpression *e = 0;
if ( !data.mFilterExpression.isEmpty() )
{
e = new QgsExpression( data.mFilterExpression );
if ( e->hasParserError() || !e->prepare( layer->pendingFields() ) )
continue;
}
if ( ki >= 0 && vi >= 0 )
{
QSet<int> attributes;
attributes << ki << vi;
QgsFeatureRequest::Flag flags = QgsFeatureRequest::NoGeometry;
if ( e )
{
if ( e->needsGeometry() )
flags = QgsFeatureRequest::NoFlags;
foreach ( const QString &field, e->referencedColumns() )
{
int idx = layer->fieldNameIndex( field );
if ( idx < 0 )
continue;
attributes << idx;
}
}
QMap< QString, QVariant > *map = new QMap< QString, QVariant >();
QgsFeatureIterator fit = layer->getFeatures( QgsFeatureRequest().setFlags( flags ).setSubsetOfAttributes( attributes.toList() ) );
QgsFeature f;
while ( fit.nextFeature( f ) )
{
if ( e && !e->evaluate( &f ).toBool() )
continue;
map->insert( f.attribute( vi ).toString(), f.attribute( ki ) );
}
mValueMaps.insert( idx, map );
}
}
break;
default:
break;
}
attributes << idx;
}