Native c++ processing algorithm provider. More...

#include <qgsnativealgorithms.h>

Inheritance diagram for QgsNativeAlgorithms:

Public Member Functions
	QgsNativeAlgorithms (QObject *parent=nullptr)
	Constructor for QgsNativeAlgorithms. More...

QString	helpId () const override
	Returns the provider help id string, used for creating QgsHelp urls for algorithms belong to this provider. More...

QIcon	icon () const override
	Returns an icon for the provider. More...

QString	id () const override
	Returns the unique provider id, used for identifying the provider. More...

QString	name () const override
	Returns the provider name, which is used to describe the provider within the GUI. More...

bool	supportsNonFileBasedOutput () const override
	Returns `true` if the provider supports non-file based outputs (such as memory layers or direct database outputs). More...

QString	svgIconPath () const override
	Returns a path to an SVG version of the provider's icon. More...

Public Member Functions inherited from QgsProcessingProvider
	QgsProcessingProvider (QObject *parent=nullptr)
	Constructor for QgsProcessingProvider. More...

	QgsProcessingProvider (const QgsProcessingProvider &other)=delete
	Providers cannot be copied. More...

	~QgsProcessingProvider () override

const QgsProcessingAlgorithm *	algorithm (const QString &name) const
	Returns the matching algorithm by name, or `nullptr` if no matching algorithm is contained by this provider. More...

QList< const QgsProcessingAlgorithm *>	algorithms () const
	Returns a list of algorithms supplied by this provider. More...

virtual bool	canBeActivated () const
	Returns `true` if the provider can be activated, or `false` if it cannot be activated (e.g. More...

virtual QString	defaultRasterFileExtension () const
	Returns the default file extension to use for raster outputs created by the provider. More...

virtual QString	defaultVectorFileExtension (bool hasGeometry=true) const
	Returns the default file extension to use for vector outputs created by the provider. More...

virtual bool	isActive () const
	Returns `true` if the provider is active and able to run algorithms. More...

virtual bool	isSupportedOutputValue (const QVariant &outputValue, const QgsProcessingDestinationParameter *parameter, QgsProcessingContext &context, QString &error) const
	Returns `true` if the specified outputValue is of a supported file format for the given destination parameter. More...

virtual bool	load ()
	Loads the provider. More...

virtual QString	longName () const
	Returns the longer version of the provider name, which can include extra details such as version numbers. More...

QgsProcessingProvider &	operator= (const QgsProcessingProvider &other)=delete
	Providers cannot be copied. More...

void	refreshAlgorithms ()
	Refreshes the algorithms available from the provider, causing it to re-populate with all associated algorithms. More...

virtual QStringList	supportedOutputRasterLayerExtensions () const
	Returns a list of the raster format file extensions supported by this provider. More...

virtual QStringList	supportedOutputTableExtensions () const
	Returns a list of the table (geometry-less vector layers) file extensions supported by this provider. More...

virtual QStringList	supportedOutputVectorLayerExtensions () const
	Returns a list of the vector format file extensions supported by this provider. More...

virtual void	unload ()
	Unloads the provider. More...

virtual QString	versionInfo () const
	Returns a version information string for the provider, or an empty string if this is not applicable (e.g. More...

Protected Member Functions
void	loadAlgorithms () override
	Loads all algorithms belonging to this provider. More...

Protected Member Functions inherited from QgsProcessingProvider
bool	addAlgorithm (QgsProcessingAlgorithm *algorithm)
	Adds an algorithm to the provider. More...

Additional Inherited Members
Signals inherited from QgsProcessingProvider
void	algorithmsLoaded ()
	Emitted when the provider has loaded (or refreshed) its list of available algorithms. More...

Detailed Description

Native c++ processing algorithm provider.

Since: QGIS 3.0

Definition at line 31 of file qgsnativealgorithms.h.

Constructor & Destructor Documentation

◆ QgsNativeAlgorithms()

QgsNativeAlgorithms::QgsNativeAlgorithms ( QObject * parent = nullptr )

Constructor for QgsNativeAlgorithms.

Member Function Documentation

◆ helpId()

QString QgsNativeAlgorithms::helpId ( ) const

overridevirtual

Returns the provider help id string, used for creating QgsHelp urls for algorithms belong to this provider.

By default, this returns an empty string, meaning that no QgsHelp url should be created for the provider's algorithms.

See also: id()

Reimplemented from QgsProcessingProvider.

◆ icon()

QIcon QgsNativeAlgorithms::icon ( ) const

overridevirtual

Returns an icon for the provider.

See also: svgIconPath()

Reimplemented from QgsProcessingProvider.

◆ id()

QString QgsNativeAlgorithms::id ( ) const

overridevirtual

Returns the unique provider id, used for identifying the provider.

This string should be a unique, short, character only string, eg "qgis" or "gdal". This string should not be localised.

See also: name(); helpId()

Implements QgsProcessingProvider.

◆ loadAlgorithms()

void QgsNativeAlgorithms::loadAlgorithms ( )

overrideprotectedvirtual

Loads all algorithms belonging to this provider.

Subclasses should implement this, calling addAlgorithm() to register all their associated algorithms.

Implements QgsProcessingProvider.

◆ name()

QString QgsNativeAlgorithms::name ( ) const

overridevirtual

Returns the provider name, which is used to describe the provider within the GUI.

This string should be short (e.g. "Lastools") and localised.

See also: longName(); id()

Implements QgsProcessingProvider.

◆ supportsNonFileBasedOutput()

bool QgsNativeAlgorithms::supportsNonFileBasedOutput ( ) const

overridevirtual

Returns true if the provider supports non-file based outputs (such as memory layers or direct database outputs).

If a provider returns false for this method than it indicates that none of the outputs from any of the provider's algorithms have support for non-file based outputs. Returning true indicates that the algorithm's parameters will each individually declare their non-file based support.

The default behavior for providers is to support non-file based outputs, and most providers which rely solely on QGIS API (and which do not depend on third-party scripts or external dependencies) will automatically support this.