Stores global configuration for labeling engine. More...

#include <qgslabelingenginesettings.h>

Public Types
enum	Search { Chain , Popmusic_Tabu , Popmusic_Chain , Popmusic_Tabu_Chain , Falp }
	Search methods in the PAL library to remove colliding labels (methods have different processing speed and number of labels placed) More...

Public Member Functions
	QgsLabelingEngineSettings ()

	QgsLabelingEngineSettings (const QgsLabelingEngineSettings &other)

	~QgsLabelingEngineSettings ()

void	addRule (QgsAbstractLabelingEngineRule *rule)
	Adds a labeling engine rule which must be satifisfied while placing labels.

void	clear ()
	Returns the configuration to the defaults.

Qgis::TextRenderFormat	defaultTextRenderFormat () const
	Returns the default text rendering format for the labels.

Qgis::LabelingFlags	flags () const
	Gets flags of the labeling engine.

double	maximumLineCandidatesPerCm () const
	Returns the maximum number of line label candidate positions per centimeter.

double	maximumPolygonCandidatesPerCmSquared () const
	Returns the maximum number of polygon label candidate positions per centimeter squared.

Q_DECL_DEPRECATED void	numCandidatePositions (int &candPoint, int &candLine, int &candPolygon) const
	Gets number of candidate positions that will be generated for each label feature.

QgsLabelingEngineSettings &	operator= (const QgsLabelingEngineSettings &other)

Qgis::LabelPlacementEngineVersion	placementVersion () const
	Returns the placement engine version, which dictates how the label placement problem is solved.

void	readSettingsFromProject (QgsProject *project)
	Read configuration of the labeling engine from a project.

void	readXml (const QDomElement &element, const QgsReadWriteContext &context)
	Reads the label engine settings from an XML element.

void	resolveReferences (const QgsProject *project)
	Resolves reference to layers from stored layer ID.

QList< QgsAbstractLabelingEngineRule * >	rules ()
	Returns a list of labeling engine rules which must be satifisfied while placing labels.

QList< const QgsAbstractLabelingEngineRule * >	rules () const
	Returns a list of labeling engine rules which must be satifisfied while placing labels.

Q_DECL_DEPRECATED Search	searchMethod () const
	Which search method to use for removal collisions between labels.

void	setDefaultTextRenderFormat (Qgis::TextRenderFormat format)
	Sets the default text rendering format for the labels.

void	setFlag (Qgis::LabelingFlag f, bool enabled=true)
	Sets whether a particual flag is enabled.

void	setFlags (Qgis::LabelingFlags flags)
	Sets flags of the labeling engine.

void	setMaximumLineCandidatesPerCm (double candidates)
	Sets the maximum number of line label candidates per centimeter.

void	setMaximumPolygonCandidatesPerCmSquared (double candidates)
	Sets the maximum number of polygon label candidates per centimeter squared.

Q_DECL_DEPRECATED void	setNumCandidatePositions (int candPoint, int candLine, int candPolygon)
	Sets the number of candidate positions that will be generated for each label feature.

void	setPlacementVersion (Qgis::LabelPlacementEngineVersion version)
	Sets the placement engine version, which dictates how the label placement problem is solved.

void	setRules (const QList< QgsAbstractLabelingEngineRule * > &rules)
	Sets the labeling engine rules which must be satifisfied while placing labels.

Q_DECL_DEPRECATED void	setSearchMethod (Search s)
	Used to set which search method to use for removal collisions between labels.

void	setUnplacedLabelColor (const QColor &color)
	Sets the color to use when rendering unplaced labels.

bool	testFlag (Qgis::LabelingFlag f) const
	Test whether a particular flag is enabled.

QColor	unplacedLabelColor () const
	Returns the color to use when rendering unplaced labels.

void	writeSettingsToProject (QgsProject *project)
	Write configuration of the labeling engine to a project.

void	writeXml (QDomDocument &doc, QDomElement &element, const QgsReadWriteContext &context) const
	Writes the label engine settings to an XML element.

Detailed Description

Stores global configuration for labeling engine.

Definition at line 33 of file qgslabelingenginesettings.h.

Member Enumeration Documentation

◆ Search

enum QgsLabelingEngineSettings::Search

Search methods in the PAL library to remove colliding labels (methods have different processing speed and number of labels placed)

Enumerator
Chain
Popmusic_Tabu
Popmusic_Chain
Popmusic_Tabu_Chain
Falp

Definition at line 43 of file qgslabelingenginesettings.h.

Constructor & Destructor Documentation

◆ QgsLabelingEngineSettings() [1/2]

QgsLabelingEngineSettings::QgsLabelingEngineSettings ( )

Definition at line 24 of file qgslabelingenginesettings.cpp.

◆ ~QgsLabelingEngineSettings()

QgsLabelingEngineSettings::~QgsLabelingEngineSettings ( )

default

◆ QgsLabelingEngineSettings() [2/2]

QgsLabelingEngineSettings::QgsLabelingEngineSettings ( const QgsLabelingEngineSettings & other )

Definition at line 30 of file qgslabelingenginesettings.cpp.

Member Function Documentation

◆ addRule()

void QgsLabelingEngineSettings::addRule ( QgsAbstractLabelingEngineRule * rule )

Adds a labeling engine rule which must be satifisfied while placing labels.

Ownership of the rule is transferred to the settings.

See also: rules(); setRules()

Since: QGIS 3.40

Definition at line 210 of file qgslabelingenginesettings.cpp.

◆ clear()

void QgsLabelingEngineSettings::clear ( )

Returns the configuration to the defaults.

Definition at line 64 of file qgslabelingenginesettings.cpp.

◆ defaultTextRenderFormat()

Qgis::TextRenderFormat QgsLabelingEngineSettings::defaultTextRenderFormat ( ) const

inline

Returns the default text rendering format for the labels.

See also: setDefaultTextRenderFormat()

Since: QGIS 3.4.3

Definition at line 197 of file qgslabelingenginesettings.h.

◆ flags()

Qgis::LabelingFlags QgsLabelingEngineSettings::flags ( ) const

inline

Gets flags of the labeling engine.

Definition at line 64 of file qgslabelingenginesettings.h.

◆ maximumLineCandidatesPerCm()

double QgsLabelingEngineSettings::maximumLineCandidatesPerCm ( ) const

inline

Returns the maximum number of line label candidate positions per centimeter.

See also: setMaximumLineCandidatesPerCm()

Since: QGIS 3.12

Definition at line 76 of file qgslabelingenginesettings.h.

◆ maximumPolygonCandidatesPerCmSquared()

double QgsLabelingEngineSettings::maximumPolygonCandidatesPerCmSquared ( ) const

inline

Returns the maximum number of polygon label candidate positions per centimeter squared.

See also: setMaximumPolygonCandidatesPerCmSquared()

Since: QGIS 3.12

Definition at line 92 of file qgslabelingenginesettings.h.

◆ numCandidatePositions()

Q_DECL_DEPRECATED void QgsLabelingEngineSettings::numCandidatePositions	(	int &	candPoint,
		int &	candLine,
		int &	candPolygon
	)		const

inline

Gets number of candidate positions that will be generated for each label feature.

Deprecated:: QGIS 3.12. Use maximumPolygonCandidatesPerCmSquared() and maximumLineCandidatesPerCm() instead.

Definition at line 106 of file qgslabelingenginesettings.h.

◆ operator=()

QgsLabelingEngineSettings & QgsLabelingEngineSettings::operator= ( const QgsLabelingEngineSettings & other )

Definition at line 46 of file qgslabelingenginesettings.cpp.

◆ placementVersion()

Qgis::LabelPlacementEngineVersion QgsLabelingEngineSettings::placementVersion ( ) const

Returns the placement engine version, which dictates how the label placement problem is solved.

See also: setPlacementVersion()

Since: QGIS 3.10.2

Definition at line 180 of file qgslabelingenginesettings.cpp.

◆ readSettingsFromProject()

void QgsLabelingEngineSettings::readSettingsFromProject ( QgsProject * project )

Read configuration of the labeling engine from a project.

Note: Both this method and readXml() must be called to completely restore the object's state from a project.

Definition at line 69 of file qgslabelingenginesettings.cpp.

◆ readXml()

void QgsLabelingEngineSettings::readXml	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

Reads the label engine settings from an XML element.

Note: Both this method and readSettingsFromProject() must be called to completely restore the object's state from a project.; resolveReferences() must be called following this method.

See also: writeXml(); readSettingsFromProject()

Since: QGIS 3.40

Definition at line 138 of file qgslabelingenginesettings.cpp.

◆ resolveReferences()

void QgsLabelingEngineSettings::resolveReferences ( const QgsProject * project )

Resolves reference to layers from stored layer ID.

Should be called following a call readXml().

Since: QGIS 3.40

Definition at line 162 of file qgslabelingenginesettings.cpp.

◆ rules() [1/2]

QList< QgsAbstractLabelingEngineRule * > QgsLabelingEngineSettings::rules ( )

Returns a list of labeling engine rules which must be satifisfied while placing labels.

See also: addRule(); setRules()

Since: QGIS 3.40

Definition at line 190 of file qgslabelingenginesettings.cpp.

◆ rules() [2/2]

QList< const QgsAbstractLabelingEngineRule * > QgsLabelingEngineSettings::rules ( ) const

Returns a list of labeling engine rules which must be satifisfied while placing labels.

See also: addRule(); setRules()

Since: QGIS 3.40

Definition at line 200 of file qgslabelingenginesettings.cpp.

◆ searchMethod()

Q_DECL_DEPRECATED Search QgsLabelingEngineSettings::searchMethod ( ) const

inline

Which search method to use for removal collisions between labels.

Deprecated:: QGIS 3.10. Chain is always used.

Definition at line 134 of file qgslabelingenginesettings.h.

◆ setDefaultTextRenderFormat()

void QgsLabelingEngineSettings::setDefaultTextRenderFormat ( Qgis::TextRenderFormat format )

inline

Sets the default text rendering format for the labels.

See also: defaultTextRenderFormat()

Since: QGIS 3.4.3

Definition at line 208 of file qgslabelingenginesettings.h.

◆ setFlag()

void QgsLabelingEngineSettings::setFlag	(	Qgis::LabelingFlag	f,
		bool	enabled = `true`
	)

inline

Sets whether a particual flag is enabled.

Definition at line 68 of file qgslabelingenginesettings.h.

◆ setFlags()

void QgsLabelingEngineSettings::setFlags ( Qgis::LabelingFlags flags )

inline

Sets flags of the labeling engine.

Definition at line 62 of file qgslabelingenginesettings.h.

◆ setMaximumLineCandidatesPerCm()

void QgsLabelingEngineSettings::setMaximumLineCandidatesPerCm ( double candidates )

inline

Sets the maximum number of line label candidates per centimeter.

See also: maximumLineCandidatesPerCm()

Since: QGIS 3.12

Definition at line 84 of file qgslabelingenginesettings.h.

◆ setMaximumPolygonCandidatesPerCmSquared()

void QgsLabelingEngineSettings::setMaximumPolygonCandidatesPerCmSquared ( double candidates )

inline

Sets the maximum number of polygon label candidates per centimeter squared.

See also: maximumPolygonCandidatesPerCmSquared()

Since: QGIS 3.12

Definition at line 100 of file qgslabelingenginesettings.h.

◆ setNumCandidatePositions()

Q_DECL_DEPRECATED void QgsLabelingEngineSettings::setNumCandidatePositions	(	int	candPoint,
		int	candLine,
		int	candPolygon
	)

inline

Sets the number of candidate positions that will be generated for each label feature.

Deprecated:: QGIS 3.12. Use setMaximumPolygonCandidatesPerCmSquared() and setMaximumLineCandidatesPerCm() instead.

Definition at line 117 of file qgslabelingenginesettings.h.

◆ setPlacementVersion()

void QgsLabelingEngineSettings::setPlacementVersion ( Qgis::LabelPlacementEngineVersion version )

Sets the placement engine version, which dictates how the label placement problem is solved.

See also: placementVersion()

Since: QGIS 3.10.2

Definition at line 185 of file qgslabelingenginesettings.cpp.

◆ setRules()

void QgsLabelingEngineSettings::setRules ( const QList< QgsAbstractLabelingEngineRule * > & rules )

Sets the labeling engine rules which must be satifisfied while placing labels.

Ownership of the rules are transferred to the settings.

See also: addRule(); rules()

Since: QGIS 3.40

Definition at line 215 of file qgslabelingenginesettings.cpp.

◆ setSearchMethod()

Q_DECL_DEPRECATED void QgsLabelingEngineSettings::setSearchMethod ( Search s )

inline

Used to set which search method to use for removal collisions between labels.

Deprecated:: QGIS 3.10. Chain is always used.

Definition at line 128 of file qgslabelingenginesettings.h.

◆ setUnplacedLabelColor()

void QgsLabelingEngineSettings::setUnplacedLabelColor ( const QColor & color )

Sets the color to use when rendering unplaced labels.

See also: unplacedLabelColor()

Since: QGIS 3.10

Definition at line 175 of file qgslabelingenginesettings.cpp.

◆ testFlag()

bool QgsLabelingEngineSettings::testFlag ( Qgis::LabelingFlag f ) const

inline

Test whether a particular flag is enabled.

Definition at line 66 of file qgslabelingenginesettings.h.

◆ unplacedLabelColor()

QColor QgsLabelingEngineSettings::unplacedLabelColor ( ) const

Returns the color to use when rendering unplaced labels.

See also: setUnplacedLabelColor()

Since: QGIS 3.10

Definition at line 170 of file qgslabelingenginesettings.cpp.

◆ writeSettingsToProject()

void QgsLabelingEngineSettings::writeSettingsToProject ( QgsProject * project )

Write configuration of the labeling engine to a project.

Note: Both this method and writeXml() must be called to completely store the object's state in a project.

Definition at line 98 of file qgslabelingenginesettings.cpp.

◆ writeXml()

void QgsLabelingEngineSettings::writeXml	(	QDomDocument &	doc,
		QDomElement &	element,
		const QgsReadWriteContext &	context
	)		const

Writes the label engine settings to an XML element.

Note: Both this method and writeSettingsToProject() must be called to completely store the object's state in a project.

See also: readXml(); writeSettingsToProject()

Since: QGIS 3.40

Definition at line 118 of file qgslabelingenginesettings.cpp.

The documentation for this class was generated from the following files:

/build/qgis-3.41.0+git20241122+3440c17df1d+99sid/src/core/labeling/qgslabelingenginesettings.h
/build/qgis-3.41.0+git20241122+3440c17df1d+99sid/src/core/labeling/qgslabelingenginesettings.cpp

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ Search

Constructor & Destructor Documentation

◆ QgsLabelingEngineSettings() [1/2]

◆ ~QgsLabelingEngineSettings()

◆ QgsLabelingEngineSettings() [2/2]

Member Function Documentation

◆ addRule()

◆ clear()

◆ defaultTextRenderFormat()

◆ flags()

◆ maximumLineCandidatesPerCm()

◆ maximumPolygonCandidatesPerCmSquared()

◆ numCandidatePositions()

◆ operator=()

◆ placementVersion()

◆ readSettingsFromProject()

◆ readXml()

◆ resolveReferences()

◆ rules() [1/2]

◆ rules() [2/2]

◆ searchMethod()

◆ setDefaultTextRenderFormat()

◆ setFlag()

◆ setFlags()

◆ setMaximumLineCandidatesPerCm()

◆ setMaximumPolygonCandidatesPerCmSquared()

◆ setNumCandidatePositions()

◆ setPlacementVersion()

◆ setRules()

◆ setSearchMethod()

◆ setUnplacedLabelColor()

◆ testFlag()

◆ unplacedLabelColor()

◆ writeSettingsToProject()

◆ writeXml()