89 std::unique_ptr<QgsVectorLayerExporterTask>
createExporterTask(
const QVariantMap &extraProviderOptions = QVariantMap() );
94 void sourceLayerComboChanged();
97 void loadFieldsFromLayer();
103 std::unique_ptr< QgsVectorLayer > mOwnedSource;
104 QPointer< QgsVectorLayer > mSourceLayer;
106 int mBlockSourceLayerChanges = 0;
108 std::unique_ptr< QgsAbstractDatabaseProviderConnection > mConnection;
Abstract interface for generating an expression context.
virtual QgsExpressionContext createExpressionContext() const =0
This method needs to be reimplemented in all classes which implement this interface and return an exp...
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...