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6aa10c6817
Ensure that layers created by QgsProcessingUtils::createFeatureSink can always be retrieved using QgsProcessingUtils::mapLayerFromString
167 lines
6.5 KiB
Plaintext
167 lines
6.5 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/processing/qgsprocessingutils.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsProcessingUtils
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{
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%Docstring
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Utility functions for use with processing classes.
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.. versionadded:: 3.0
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%End
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%TypeHeaderCode
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#include "qgsprocessingutils.h"
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%End
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public:
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static QList< QgsRasterLayer * > compatibleRasterLayers( QgsProject *project, bool sort = true );
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%Docstring
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Returns a list of raster layers from a ``project`` which are compatible with the processing
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framework.
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If the ``sort`` argument is true then the layers will be sorted by their QgsMapLayer.name()
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value.
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.. seealso:: compatibleVectorLayers()
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.. seealso:: compatibleLayers()
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:rtype: list of QgsRasterLayer
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%End
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static QList< QgsVectorLayer * > compatibleVectorLayers( QgsProject *project,
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const QList< QgsWkbTypes::GeometryType > &geometryTypes = QList< QgsWkbTypes::GeometryType >(),
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bool sort = true );
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%Docstring
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Returns a list of vector layers from a ``project`` which are compatible with the processing
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framework.
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If the ``geometryTypes`` list is non-empty then the layers will be sorted so that only
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layers with geometry types included in the list will be returned. Leaving the ``geometryTypes``
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list empty will cause all vector layers, regardless of their geometry type, to be returned.
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If the ``sort`` argument is true then the layers will be sorted by their QgsMapLayer.name()
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value.
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.. seealso:: compatibleRasterLayers()
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.. seealso:: compatibleLayers()
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:rtype: list of QgsVectorLayer
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%End
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static QList< QgsMapLayer * > compatibleLayers( QgsProject *project, bool sort = true );
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%Docstring
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Returns a list of map layers from a ``project`` which are compatible with the processing
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framework.
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If the ``sort`` argument is true then the layers will be sorted by their QgsMapLayer.name()
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value.
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.. seealso:: compatibleRasterLayers()
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.. seealso:: compatibleVectorLayers()
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:rtype: list of QgsMapLayer
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%End
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static QgsMapLayer *mapLayerFromString( const QString &string, QgsProcessingContext &context, bool allowLoadingNewLayers = true );
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%Docstring
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Interprets a string as a map layer within the supplied ``context``.
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The method will attempt to
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load a layer matching the passed ``string``. E.g. if the string matches a layer ID or name
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within the context's project or temporary layer store then this layer will be returned.
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If the string is a file path and ``allowLoadingNewLayers`` is true, then the layer at this
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file path will be loaded and added to the context's temporary layer store.
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Ownership of the layer remains with the ``context`` or the context's current project.
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:rtype: QgsMapLayer
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%End
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static QString normalizeLayerSource( const QString &source );
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%Docstring
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Normalizes a layer ``source`` string for safe comparison across different
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operating system environments.
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:rtype: str
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%End
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static QgsFeatureIterator getFeatures( QgsVectorLayer *layer, const QgsProcessingContext &context, const QgsFeatureRequest &request = QgsFeatureRequest() );
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%Docstring
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Returns an iterator for the features in a ``layer``, respecting
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the settings from the supplied ``context``.
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An optional base ``request`` can be used to optimise the returned
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iterator, eg by restricting the returned attributes or geometry.
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:rtype: QgsFeatureIterator
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%End
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static long featureCount( QgsVectorLayer *layer, const QgsProcessingContext &context );
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%Docstring
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Returns an approximate feature count for a ``layer``, when
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the settings from the supplied ``context`` are respected. E.g. if the
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context is set to only use selected features, then calling this will
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return the count of selected features in the layer.
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:rtype: long
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%End
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static QgsSpatialIndex createSpatialIndex( QgsVectorLayer *layer, const QgsProcessingContext &context );
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%Docstring
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Creates a spatial index for a layer, when
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the settings from the supplied ``context`` are respected. E.g. if the
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context is set to only use selected features, then calling this will
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return an index containing only selected features in the layer.
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:rtype: QgsSpatialIndex
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%End
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static QList< QVariant > uniqueValues( QgsVectorLayer *layer, int fieldIndex, const QgsProcessingContext &context );
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%Docstring
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Returns a list of unique values contained in a single field in a ``layer``, when
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the settings from the supplied ``context`` are respected. E.g. if the
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context is set to only use selected features, then calling this will
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return unique values from selected features in the layer.
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:rtype: list of QVariant
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%End
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static void createFeatureSinkPython(
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QgsFeatureSink **sink /Out,TransferBack/,
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QString &destination /In,Out/,
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const QString &encoding,
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const QgsFields &fields,
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QgsWkbTypes::Type geometryType,
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const QgsCoordinateReferenceSystem &crs,
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QgsProcessingContext &context ) /PyName=createFeatureSink/;
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%Docstring
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Creates a feature sink ready for adding features. The ``destination`` specifies a destination
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URI for the resultant layer. It may be updated in place to reflect the actual destination
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for the layer.
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Sink parameters such as desired ``encoding``, ``fields``, ``geometryType`` and ``crs`` must be specified.
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If the ``encoding`` is not specified, the default encoding from the ``context`` will be used.
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If a layer is created for the feature sink, the layer will automatically be added to the ``context``'s
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temporary layer store.
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.. note::
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this version of the createFeatureSink() function has an API designed around use from the
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SIP bindings. c++ code should call the other createFeatureSink() version.
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.. note::
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available in Python bindings as createFeatureSink()
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%End
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/processing/qgsprocessingutils.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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