18 #ifndef QGSPROCESSINGUTILS_H 19 #define QGSPROCESSINGUTILS_H 21 #include "qgis_core.h" 57 static QList< QgsRasterLayer * > compatibleRasterLayers(
QgsProject *project,
bool sort =
true );
72 static QList< QgsVectorLayer * > compatibleVectorLayers(
QgsProject *project,
73 const QList< QgsWkbTypes::GeometryType > &geometryTypes = QList< QgsWkbTypes::GeometryType >(),
85 static QList< QgsMapLayer * > compatibleLayers(
QgsProject *project,
bool sort =
true );
116 static QString normalizeLayerSource(
const QString &source );
121 static QString stringToPythonLiteral(
const QString &
string );
142 QString &destination,
147 const QVariantMap &createOptions = QVariantMap() )
SIP_FACTORY;
169 static void createFeatureSinkPython(
176 const QVariantMap &createOptions = QVariantMap() )
SIP_PYNAME( createFeatureSink );
190 static QVariant generateIteratingDestination(
const QVariant &input,
const QVariant &
id,
QgsProcessingContext &context );
196 static QString tempFolder();
204 static QString generateTempFilename(
const QString &basename );
224 static QString convertToCompatibleFormat(
const QgsVectorLayer *layer,
225 bool selectedFeaturesOnly,
226 const QString &baseName,
227 const QStringList &compatibleFormats,
228 const QString &preferredFormat,
248 const QList< QgsWkbTypes::GeometryType > &geometryTypes = QList< QgsWkbTypes::GeometryType >() );
268 static QgsMapLayer *loadMapLayerFromString(
const QString &
string );
270 static void parseDestinationString( QString &destination, QString &providerKey, QString &uri, QString &layerName, QString &format, QMap<QString, QVariant> &options,
bool &useWriter );
272 friend class TestQgsProcessing;
290 FlagSkipGeometryValidityChecks = 1 << 1,
292 Q_DECLARE_FLAGS( Flags,
Flag )
318 QSet<QVariant>
uniqueValues(
int fieldIndex,
int limit = -1 )
const override;
332 bool mOwnsSource = false;
334 std::function<
void( const
QgsFeature & ) > mInvalidGeometryCallback;
335 std::function<
void( const
QgsFeature & ) > mTransformErrorCallback;
376 bool mOwnsSink =
false;
381 #endif // QGSPROCESSINGUTILS_H Wrapper for iterator of features from vector data provider or vector layer.
virtual QgsRectangle sourceExtent() const
Returns the extent of all geometries from the source.
A rectangle specified with double values.
Base class for all map layer types.
Base class for providing feedback from a processing algorithm.
virtual QgsFields fields() const =0
Returns the fields associated with features in the source.
A simple feature sink which proxies feature addition on to another feature sink.
QSet< QgsFeatureId > QgsFeatureIds
This class provides qgis with the ability to render raster datasets onto the mapcanvas.
QList< QgsFeature > QgsFeatureList
virtual QgsWkbTypes::Type wkbType() const =0
Returns the geometry type for features returned by this source.
An interface for objects which accept features via addFeature(s) methods.
QgsFeatureSource subclass which proxies methods to an underlying QgsFeatureSource, modifying results according to the settings in a QgsProcessingContext.
Container of fields for a vector layer.
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Abstract base class for processing algorithms.
Utility functions for use with processing classes.
bool addFeatures(QgsFeatureList &features, QgsFeatureSink::Flags flags=nullptr) override
Adds a list of features to the sink.
Type
The WKB type describes the number of dimensions a geometry has.
virtual QVariant minimumValue(int fieldIndex) const
Returns the minimum value for an attribute column or an invalid variant in case of error...
This class wraps a request for features to a vector layer (or directly its vector data provider)...
Reads and writes project states.
Single scope for storing variables and functions for use within a QgsExpressionContext.
virtual QSet< QVariant > uniqueValues(int fieldIndex, int limit=-1) const
Returns the set of unique values contained within the specified fieldIndex from this source...
virtual QgsCoordinateReferenceSystem sourceCrs() const =0
Returns the coordinate reference system for features in the source.
Flag
Flags controlling how QgsProcessingFeatureSource fetches features.
QgsProxyFeatureSink subclass which reports feature addition errors to a QgsProcessingContext.
An interface for objects which provide features via a getFeatures method.
This class represents a coordinate reference system (CRS).
A storage object for map layers, in which the layers are owned by the store and have their lifetime b...
bool addFeature(QgsFeature &feature, QgsFeatureSink::Flags flags=nullptr) override
Adds a single feature to the sink.
virtual QVariant maximumValue(int fieldIndex) const
Returns the maximum value for an attribute column or an invalid variant in case of error...
virtual QString sourceName() const =0
Returns a friendly display name for the source.
Represents a vector layer which manages a vector based data sets.
virtual QgsFeatureIds allFeatureIds() const
Returns a list of all feature IDs for features present in the source.
Contains information about the context in which a processing algorithm is executed.
virtual QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const =0
Returns an iterator for the features in the source.
virtual long featureCount() const =0
Returns the number of features contained in the source, or -1 if the feature count is unknown...