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add model variables in expressionContext scope to be mapped in case used in symbolic formulas

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This commit is contained in:
Luigi Pirelli 2018-07-10 18:51:06 +02:00
parent 2810c92f01
commit 0acb766412
1 changed files with 8 additions and 1 deletions
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9
src/core/processing/models/qgsprocessingmodelalgorithm.cpp
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@ -273,6 +273,7 @@ QVariantMap QgsProcessingModelAlgorithm::processAlgorithm( const QVariantMap &pa
QgsExpressionContext expContext = baseContext;
expContext << QgsExpressionContextUtils::processingAlgorithmScope( child.algorithm(), parameters, context )
<< createExpressionContextScopeForChildAlgorithm( childId, context, parameters, childResults );
context.setExpressionContext( expContext );
QVariantMap childParams = parametersForChildAlgorithm( child, parameters, childResults, expContext );
if ( feedback )
@ -530,6 +531,9 @@ QMap<QString, QgsProcessingModelAlgorithm::VariableDefinition> QgsProcessingMode
if ( !layer )
layer = QgsProcessingUtils::mapLayerFromString( value.toString(), context );
// TODO: should I tag variable name with type? e.g. %1_maplayer
variables.insert( safeName( QStringLiteral( "%1" ).arg( name ) ), VariableDefinition( value, source, description ) );
variables.insert( safeName( QStringLiteral( "%1_minx" ).arg( name ) ), VariableDefinition( layer ? layer->extent().xMinimum() : QVariant(), source, QObject::tr( "Minimum X of %1" ).arg( description ) ) );
variables.insert( safeName( QStringLiteral( "%1_miny" ).arg( name ) ), VariableDefinition( layer ? layer->extent().yMinimum() : QVariant(), source, QObject::tr( "Minimum Y of %1" ).arg( description ) ) );
variables.insert( safeName( QStringLiteral( "%1_maxx" ).arg( name ) ), VariableDefinition( layer ? layer->extent().xMaximum() : QVariant(), source, QObject::tr( "Maximum X of %1" ).arg( description ) ) );
@ -595,6 +599,9 @@ QMap<QString, QgsProcessingModelAlgorithm::VariableDefinition> QgsProcessingMode
featureSource = vl;
}
// TODO: should I tag variable name with type? e.g. %1_feature
variables.insert( safeName( QStringLiteral( "%1" ).arg( name ) ), VariableDefinition( value, source, description ) );
variables.insert( safeName( QStringLiteral( "%1_minx" ).arg( name ) ), VariableDefinition( featureSource ? featureSource->sourceExtent().xMinimum() : QVariant(), source, QObject::tr( "Minimum X of %1" ).arg( description ) ) );
variables.insert( safeName( QStringLiteral( "%1_miny" ).arg( name ) ), VariableDefinition( featureSource ? featureSource->sourceExtent().yMinimum() : QVariant(), source, QObject::tr( "Minimum Y of %1" ).arg( description ) ) );
variables.insert( safeName( QStringLiteral( "%1_maxx" ).arg( name ) ), VariableDefinition( featureSource ? featureSource->sourceExtent().xMaximum() : QVariant(), source, QObject::tr( "Maximum X of %1" ).arg( description ) ) );
@ -606,7 +613,7 @@ QMap<QString, QgsProcessingModelAlgorithm::VariableDefinition> QgsProcessingMode
QgsExpressionContextScope *QgsProcessingModelAlgorithm::createExpressionContextScopeForChildAlgorithm( const QString &childId, QgsProcessingContext &context, const QVariantMap &modelParameters, const QVariantMap &results ) const
{
std::unique_ptr< QgsExpressionContextScope > scope( new QgsExpressionContextScope() );
std::unique_ptr< QgsExpressionContextScope > scope( new QgsExpressionContextScope( QStringLiteral( "algorithm_inputs" ) ) );
QMap< QString, QgsProcessingModelAlgorithm::VariableDefinition> variables = variablesForChildAlgorithm( childId, context, modelParameters, results );
QMap< QString, QgsProcessingModelAlgorithm::VariableDefinition>::const_iterator varIt = variables.constBegin();
for ( ; varIt != variables.constEnd(); ++varIt )