Contains settings for how a map layer will be labeled. More...

#include <qgspallabeling.h>

Public Types
enum	DirectionSymbols { SymbolLeftRight , SymbolAbove , SymbolBelow }

enum	LinePlacementFlags { OnLine = 1 , AboveLine = 2 , BelowLine = 4 , MapOrientation = 8 }
	Line placement flags, which control how candidates are generated for a linear feature. More...

enum	ObstacleType { PolygonInterior , PolygonBoundary , PolygonWhole }
	Valid obstacle types, which affect how features within the layer will act as obstacles for labels. More...

enum	Property { Size = 0 , Bold = 1 , Italic = 2 , Underline = 3 , Color = 4 , Strikeout = 5 , Family = 6 , FontStyle = 21 , FontSizeUnit = 22 , FontTransp = 18 , FontOpacity = 92 , FontCase = 27 , FontLetterSpacing = 28 , FontWordSpacing = 29 , FontBlendMode = 30 , FontStretchFactor = 113 , MultiLineWrapChar = 31 , AutoWrapLength = 101 , MultiLineHeight = 32 , MultiLineAlignment = 33 , TextOrientation = 110 , DirSymbDraw = 34 , DirSymbLeft = 35 , DirSymbRight = 36 , DirSymbPlacement = 37 , DirSymbReverse = 38 , NumFormat = 39 , NumDecimals = 40 , NumPlusSign = 41 , BufferDraw = 42 , BufferSize = 7 , BufferUnit = 43 , BufferColor = 8 , BufferTransp = 19 , BufferOpacity = 94 , BufferJoinStyle = 44 , BufferBlendMode = 45 , MaskEnabled = 104 , MaskBufferSize = 105 , MaskBufferUnit = 106 , MaskOpacity = 107 , MaskJoinStyle = 108 , ShapeDraw = 46 , ShapeKind = 47 , ShapeSVGFile = 48 , ShapeSizeType = 49 , ShapeSizeX = 50 , ShapeSizeY = 85 , ShapeSizeUnits = 51 , ShapeRotationType = 52 , ShapeRotation = 53 , ShapeOffset = 54 , ShapeOffsetUnits = 55 , ShapeRadii = 56 , ShapeRadiiUnits = 57 , ShapeTransparency = 63 , ShapeOpacity = 93 , ShapeBlendMode = 64 , ShapeFillColor = 58 , ShapeStrokeColor = 59 , ShapeStrokeWidth = 60 , ShapeStrokeWidthUnits = 61 , ShapeJoinStyle = 62 , ShadowDraw = 65 , ShadowUnder = 66 , ShadowOffsetAngle = 67 , ShadowOffsetDist = 68 , ShadowOffsetUnits = 69 , ShadowRadius = 70 , ShadowRadiusUnits = 71 , ShadowTransparency = 72 , ShadowOpacity = 95 , ShadowScale = 73 , ShadowColor = 74 , ShadowBlendMode = 75 , CentroidWhole = 76 , OffsetQuad = 77 , OffsetXY = 78 , OffsetUnits = 80 , LabelDistance = 13 , DistanceUnits = 81 , OffsetRotation = 82 , CurvedCharAngleInOut = 83 , PositionX = 9 , PositionY = 10 , PositionPoint = 114 , Hali = 11 , Vali = 12 , Rotation = 14 , LabelRotation = 96 , RepeatDistance = 84 , RepeatDistanceUnit = 86 , Priority = 87 , PredefinedPositionOrder = 91 , LinePlacementOptions = 99 , OverrunDistance = 102 , LabelAllParts = 103 , PolygonLabelOutside = 109 , LineAnchorPercent = 111 , LineAnchorClipping = 112 , LineAnchorType = 115 , LineAnchorTextPoint = 116 , ScaleVisibility = 23 , MinScale = 16 , MinimumScale = 97 , MaxScale = 17 , MaximumScale = 98 , FontLimitPixel = 24 , FontMinPixel = 25 , FontMaxPixel = 26 , IsObstacle = 88 , ObstacleFactor = 89 , ZIndex = 90 , CalloutDraw = 100 , AllowDegradedPlacement = 117 , OverlapHandling = 118 , Show = 15 , AlwaysShow = 20 }
	Data definable properties. More...

Public Member Functions
	QgsPalLayerSettings ()

	QgsPalLayerSettings (const QgsPalLayerSettings &s)

	~QgsPalLayerSettings ()

void	calculateLabelSize (const QFontMetricsF fm, const QString &text, double &labelX, double &labelY, const QgsFeature f=nullptr, QgsRenderContext context=nullptr, double rotatedLabelX=nullptr, double rotatedLabelY=nullptr, QgsTextDocument document=nullptr, QgsTextDocumentMetrics documentMetrics=nullptr, QRectF outerBounds=nullptr)
	Calculates the space required to render the provided text in map units. More...

QgsCallout *	callout () const
	Returns the label callout renderer, responsible for drawing label callouts. More...

bool	containsAdvancedEffects () const
	Returns `true` if any component of the label settings requires advanced effects such as blend modes, which require output in raster formats to be fully respected. More...

QgsPropertyCollection &	dataDefinedProperties ()
	Returns a reference to the label's property collection, used for data defined overrides. More...

const QgsPropertyCollection &	dataDefinedProperties () const
	Returns a reference to the label's property collection, used for data defined overrides. More...

const QgsTextFormat &	format () const
	Returns the label text formatting settings, e.g., font settings, buffer settings, etc. More...

QgsExpression *	getLabelExpression ()
	Returns the QgsExpression for this label settings. More...

QString	legendString () const
	legendString More...

QgsLabelLineSettings &	lineSettings ()
	Returns the label line settings, which contain settings related to how the label engine places and formats labels for line features (or polygon features which are labeled in a "perimeter" style mode). More...

const QgsLabelLineSettings &	lineSettings () const
	Returns the label line settings, which contain settings related to how the label engine places and formats labels for line features (or polygon features which are labeled in a "perimeter" style mode). More...

QgsLabelObstacleSettings &	obstacleSettings ()
	Returns the label obstacle settings. More...

const QgsLabelObstacleSettings &	obstacleSettings () const
	Returns the label obstacle settings. More...

QgsPalLayerSettings &	operator= (const QgsPalLayerSettings &s)
	copy operator - only copies the permanent members More...

QgsLabelPlacementSettings &	placementSettings ()
	Returns the label placement settings. More...

const QgsLabelPlacementSettings &	placementSettings () const
	Returns the label placement settings. More...

Qgis::LabelPolygonPlacementFlags	polygonPlacementFlags () const
	Returns the polygon placement flags, which dictate how polygon labels can be placed. More...

bool	prepare (QgsRenderContext &context, QSet< QString > &attributeNames, const QgsFields &fields, const QgsMapSettings &mapSettings, const QgsCoordinateReferenceSystem &crs)
	Prepare for registration of features. More...

void	readXml (const QDomElement &elem, const QgsReadWriteContext &context)
	Read settings from a DOM element. More...

QSet< QString >	referencedFields (const QgsRenderContext &context) const
	Returns all field names referenced by the configuration (e.g. More...

void	registerFeature (const QgsFeature &f, QgsRenderContext &context)
	Registers a feature for labeling. More...

std::unique_ptr< QgsLabelFeature >	registerFeatureWithDetails (const QgsFeature &feature, QgsRenderContext &context, QgsGeometry obstacleGeometry=QgsGeometry(), const QgsSymbol *symbol=nullptr)
	Registers a feature for labeling. More...

Qgis::AngleUnit	rotationUnit () const
	Unit for rotation of labels. More...

void	setCallout (QgsCallout *callout)
	Sets the label callout renderer, responsible for drawing label callouts. More...

void	setDataDefinedProperties (const QgsPropertyCollection &collection)
	Sets the label's property collection, used for data defined overrides. More...

void	setFormat (const QgsTextFormat &format)
	Sets the label text formatting settings, e.g., font settings, buffer settings, etc. More...

void	setLegendString (const QString &legendString)
	setLegendString More...

void	setLineSettings (const QgsLabelLineSettings &settings)
	Sets the label line settings, which contain settings related to how the label engine places and formats labels for line features (or polygon features which are labeled in a "perimeter" style mode). More...

void	setObstacleSettings (const QgsLabelObstacleSettings &settings)
	Sets the label obstacle settings. More...

void	setPlacementSettings (const QgsLabelPlacementSettings &settings)
	Sets the label placement settings. More...

void	setPolygonPlacementFlags (Qgis::LabelPolygonPlacementFlags flags)
	Sets the polygon placement flags, which dictate how polygon labels can be placed. More...

void	setRotationUnit (Qgis::AngleUnit angleUnit)
	Set unit for rotation of labels. More...

void	setThinningSettings (const QgsLabelThinningSettings &settings)
	Sets the label thinning settings. More...

void	setUnplacedVisibility (Qgis::UnplacedLabelVisibility visibility)
	Sets the layer's unplaced label visibility. More...

void	startRender (QgsRenderContext &context)
	Prepares the label settings for rendering. More...

void	stopRender (QgsRenderContext &context)
	Finalises the label settings after use. More...

QgsLabelThinningSettings &	thinningSettings ()
	Returns the label thinning settings. More...

const QgsLabelThinningSettings &	thinningSettings () const
	Returns the label thinning settings. More...

Qgis::UnplacedLabelVisibility	unplacedVisibility () const
	Returns the layer's unplaced label visibility. More...

QDomElement	writeXml (QDomDocument &doc, const QgsReadWriteContext &context) const
	Write settings into a DOM element. More...

Static Public Member Functions
static QPixmap	labelSettingsPreviewPixmap (const QgsPalLayerSettings &settings, QSize size, const QString &previewText=QString(), int padding=0, const QgsScreenProperties &screen=QgsScreenProperties())
	Returns a pixmap preview for label settings. More...

static const QgsPropertiesDefinition &	propertyDefinitions ()
	Returns the labeling property definitions. More...

Public Attributes
double	angleOffset = 0
	Label rotation, in degrees clockwise. More...

int	autoWrapLength = 0
	If non-zero, indicates that label text should be automatically wrapped to (ideally) the specified number of characters. More...

bool	centroidInside = false
	`true` if centroid positioned labels must be placed inside their corresponding feature polygon, or `false` if centroids which fall outside the polygon are permitted. More...

bool	centroidWhole = false
	`true` if feature centroid should be calculated from the whole feature, or `false` if only the visible part of the feature should be considered. More...

QgsCoordinateTransform	ct

int	decimals = 3
	Number of decimal places to show for numeric labels. More...

double	dist = 0
	Distance from feature to the label. More...

QgsMapUnitScale	distMapUnitScale
	Map unit scale for label feature distance. More...

Qgis::RenderUnit	distUnits = Qgis::RenderUnit::Millimeters
	Units the distance from feature to the label. More...

bool	drawLabels = true
	Whether to draw labels for this layer. More...

QgsGeometry	extentGeom

int	fieldIndex = 0

QString	fieldName
	Name of field (or an expression) to use for label text. More...

bool	fitInPolygonOnly = false
	`true` if only labels which completely fit within a polygon are allowed. More...

bool	fontLimitPixelSize = false
	`true` if label sizes should be limited by pixel size. More...

int	fontMaxPixelSize = 10000
	Maximum pixel size for showing rendered map unit labels (1 - 10000). More...

int	fontMinPixelSize = 0
	Minimum pixel size for showing rendered map unit labels (1 - 1000). More...

bool	formatNumbers = false
	Set to `true` to format numeric label text as numbers (e.g. More...

QString	geometryGenerator
	The geometry generator expression. Null if disabled. More...

bool	geometryGeneratorEnabled = false
	Defines if the geometry generator is enabled or not. If disabled, the standard geometry will be taken. More...

Qgis::GeometryType	geometryGeneratorType = Qgis::GeometryType::Point
	The type of the result geometry of the geometry generator. More...

bool	isExpression = false
	`true` if this label is made from a expression string, e.g., FieldName \|\| 'mm' More...

QgsMapUnitScale	labelOffsetMapUnitScale
	Map unit scale for label offset. More...

bool	labelPerPart = false
	`true` if every part of a multi-part feature should be labeled. More...

Qgis::GeometryType	layerType = Qgis::GeometryType::Unknown
	Geometry type of layers associated with these settings. More...

double	maxCurvedCharAngleIn = 25.0
	Maximum angle between inside curved label characters (valid range 20.0 to 60.0). More...

double	maxCurvedCharAngleOut = -25.0
	Maximum angle between outside curved label characters (valid range -20.0 to -95.0) More...

double	maximumScale = 0
	The maximum map scale (i.e. More...

const QgsFeature *	mCurFeat = nullptr

QgsFields	mCurFields

int	mFeatsRegPal = 0

int	mFeatsSendingToPal = 0

int	mFeaturesToLabel = 0

double	minimumScale = 0
	The minimum map scale (i.e. More...

Qgis::LabelMultiLineAlignment	multilineAlign = Qgis::LabelMultiLineAlignment::FollowPlacement
	Horizontal alignment of multi-line labels. More...

Qgis::LabelOffsetType	offsetType = Qgis::LabelOffsetType::FromPoint
	Offset type for layer (only applies in certain placement modes) More...

Qgis::RenderUnit	offsetUnits = Qgis::RenderUnit::Millimeters
	Units for offsets of label. More...

Qgis::LabelPlacement	placement = Qgis::LabelPlacement::AroundPoint
	Label placement mode. More...

bool	plusSign = false
	Whether '+' signs should be prepended to positive numeric labels. More...

QVector< Qgis::LabelPredefinedPointPosition >	predefinedPositionOrder
	Ordered list of predefined label positions for points. More...

bool	preserveRotation = true
	True if label rotation should be preserved during label pin/unpin operations. More...

Q_DECL_DEPRECATED QColor	previewBkgrdColor = Qt::white

int	priority = 5
	Label priority. More...

QgsPointXY	ptOne

QgsPointXY	ptZero

Qgis::LabelQuadrantPosition	quadOffset = Qgis::LabelQuadrantPosition::Over
	Sets the quadrant in which to offset labels from feature. More...

double	repeatDistance = 0
	Distance for repeating labels for a single feature. More...

QgsMapUnitScale	repeatDistanceMapUnitScale
	Map unit scale for repeating labels for a single feature. More...

Qgis::RenderUnit	repeatDistanceUnit = Qgis::RenderUnit::Millimeters
	Units for repeating labels for a single feature. More...

bool	scaleVisibility = false
	Set to `true` to limit label visibility to a range of scales. More...

QgsStringReplacementCollection	substitutions
	Substitution collection for automatic text substitution with labels. More...

Qgis::UpsideDownLabelHandling	upsidedownLabels = Qgis::UpsideDownLabelHandling::FlipUpsideDownLabels
	Controls whether upside down labels are displayed and how they are handled. More...

bool	useMaxLineLengthForAutoWrap = true
	If `true`, indicates that when auto wrapping label text the autoWrapLength length indicates the maximum ideal length of text lines. More...

bool	useSubstitutions = false
	True if substitutions should be applied. More...

QString	wrapChar
	Wrapping character string. More...

const QgsMapToPixel *	xform = nullptr

double	xOffset = 0
	Horizontal offset of label. More...

double	yOffset = 0
	Vertical offset of label. More...

double	zIndex = 0
	Z-Index of label, where labels with a higher z-index are rendered on top of labels with a lower z-index. More...

Friends
class	QgsVectorLayer

Detailed Description

Contains settings for how a map layer will be labeled.

Definition at line 86 of file qgspallabeling.h.

Member Enumeration Documentation

◆ DirectionSymbols

enum QgsPalLayerSettings::DirectionSymbols

Deprecated:: use QgsLabelLineSettings::DirectionSymbolPlacement instead

Enumerator
SymbolLeftRight	Place direction symbols on left/right of label.
SymbolAbove	Place direction symbols on above label.
SymbolBelow	Place direction symbols on below label.

Definition at line 118 of file qgspallabeling.h.

◆ LinePlacementFlags

enum QgsPalLayerSettings::LinePlacementFlags

Line placement flags, which control how candidates are generated for a linear feature.

Deprecated:: Use Qgis::LabelLinePlacementFlags instead

Enumerator
OnLine	Labels can be placed directly over a line feature.
AboveLine	Labels can be placed above a line feature. Unless MapOrientation is also specified this mode respects the direction of the line feature, so a line from right to left labels will have labels placed placed below the line feature.
BelowLine	Labels can be placed below a line feature. Unless MapOrientation is also specified this mode respects the direction of the line feature, so a line from right to left labels will have labels placed placed above the line feature.
MapOrientation	Signifies that the AboveLine and BelowLine flags should respect the map's orientation rather than the feature's orientation. For example, AboveLine will always result in label's being placed above a line, regardless of the line's direction.

Definition at line 103 of file qgspallabeling.h.

◆ ObstacleType

enum QgsPalLayerSettings::ObstacleType

Valid obstacle types, which affect how features within the layer will act as obstacles for labels.

Enumerator
PolygonInterior	avoid placing labels over interior of polygon (prefer placing labels totally outside or just slightly inside polygon)
PolygonBoundary	avoid placing labels over boundary of polygon (prefer placing outside or completely inside polygon)
PolygonWhole	avoid placing labels over ANY part of polygon. Where PolygonInterior will prefer to place labels with the smallest area of intersection between the label and the polygon, PolygonWhole will penalise any label which intersects with the polygon by an equal amount, so that placing labels over any part of the polygon is avoided.

Definition at line 131 of file qgspallabeling.h.

◆ Property

enum QgsPalLayerSettings::Property

Data definable properties.

Enumerator
Size	Label size.
Bold	Use bold style.
Italic	Use italic style.
Underline	Use underline.
Color	Text color.
Strikeout	Use strikeout.
Family	Font family.
FontStyle	Font style name.
FontSizeUnit	Font size units.
FontTransp	Text transparency (deprecated)
FontOpacity	Text opacity.
FontCase	Label text case.
FontLetterSpacing	Letter spacing.
FontWordSpacing	Word spacing.
FontBlendMode	Text blend mode.
FontStretchFactor	Font stretch factor, since QGIS 3.24.
MultiLineWrapChar
AutoWrapLength
MultiLineHeight
MultiLineAlignment
TextOrientation
DirSymbDraw
DirSymbLeft
DirSymbRight
DirSymbPlacement
DirSymbReverse
NumFormat
NumDecimals
NumPlusSign
BufferDraw
BufferSize
BufferUnit
BufferColor
BufferTransp	Buffer transparency (deprecated)
BufferOpacity	Buffer opacity.
BufferJoinStyle
BufferBlendMode
MaskEnabled	Whether the mask is enabled.
MaskBufferSize	Mask buffer size.
MaskBufferUnit	Mask buffer size unit.
MaskOpacity	Mask opacity.
MaskJoinStyle	Mask join style.
ShapeDraw
ShapeKind
ShapeSVGFile
ShapeSizeType
ShapeSizeX
ShapeSizeY
ShapeSizeUnits
ShapeRotationType
ShapeRotation
ShapeOffset
ShapeOffsetUnits
ShapeRadii
ShapeRadiiUnits
ShapeTransparency	Shape transparency (deprecated)
ShapeOpacity	Shape opacity.
ShapeBlendMode
ShapeFillColor
ShapeStrokeColor
ShapeStrokeWidth
ShapeStrokeWidthUnits
ShapeJoinStyle
ShadowDraw
ShadowUnder
ShadowOffsetAngle
ShadowOffsetDist
ShadowOffsetUnits
ShadowRadius
ShadowRadiusUnits
ShadowTransparency	Shadow transparency (deprecated)
ShadowOpacity	Shadow opacity.
ShadowScale
ShadowColor
ShadowBlendMode
CentroidWhole
OffsetQuad
OffsetXY
OffsetUnits
LabelDistance
DistanceUnits
OffsetRotation
CurvedCharAngleInOut
PositionX	X-coordinate data defined label position.
PositionY	Y-coordinate data defined label position.
PositionPoint	Point-coordinate data defined label position.
Hali	Horizontal alignment for data defined label position (Left, Center, Right)
Vali	Vertical alignment for data defined label position (Bottom, Base, Half, Cap, Top)
Rotation	Label rotation (deprecated, for old project compatibility only)
LabelRotation	Label rotation.
RepeatDistance
RepeatDistanceUnit
Priority
PredefinedPositionOrder
LinePlacementOptions	Line placement flags.
OverrunDistance	Distance which labels can extend past either end of linear features.
LabelAllParts	Whether all parts of multi-part features should be labeled.
PolygonLabelOutside	Whether labels outside a polygon feature are permitted, or should be forced (since QGIS 3.14)
LineAnchorPercent	Portion along line at which labels should be anchored (since QGIS 3.16)
LineAnchorClipping	Clipping mode for line anchor calculation (since QGIS 3.20)
LineAnchorType	Line anchor type (since QGIS 3.26)
LineAnchorTextPoint	Line anchor text point (since QGIS 3.26)
ScaleVisibility
MinScale	Min scale (deprecated, for old project compatibility only)
MinimumScale	Minimum map scale (ie most "zoomed out")
MaxScale	Max scale (deprecated, for old project compatibility only)
MaximumScale	Maximum map scale (ie most "zoomed in")
FontLimitPixel
FontMinPixel
FontMaxPixel
IsObstacle
ObstacleFactor
ZIndex
CalloutDraw	Show callout.
AllowDegradedPlacement	Allow degraded label placements (since QGIS 3.26)
OverlapHandling	Overlap handling technique (since QGIS 3.26)
Show
AlwaysShow

Definition at line 144 of file qgspallabeling.h.

Constructor & Destructor Documentation

◆ QgsPalLayerSettings() [1/2]

Q_NOWARN_DEPRECATED_PUSH QgsPalLayerSettings::QgsPalLayerSettings ( )

Definition at line 261 of file qgspallabeling.cpp.

◆ QgsPalLayerSettings() [2/2]

Q_NOWARN_DEPRECATED_POP Q_NOWARN_DEPRECATED_PUSH QgsPalLayerSettings::QgsPalLayerSettings ( const QgsPalLayerSettings & s )

Definition at line 272 of file qgspallabeling.cpp.

◆ ~QgsPalLayerSettings()

QgsPalLayerSettings::~QgsPalLayerSettings ( )

Definition at line 586 of file qgspallabeling.cpp.

Member Function Documentation

◆ calculateLabelSize()

void QgsPalLayerSettings::calculateLabelSize	(	const QFontMetricsF *	fm,
		const QString &	text,
		double &	labelX,
		double &	labelY,
		const QgsFeature *	f = `nullptr`,
		QgsRenderContext *	context = `nullptr`,
		double *	rotatedLabelX = `nullptr`,
		double *	rotatedLabelY = `nullptr`,
		QgsTextDocument *	document = `nullptr`,
		QgsTextDocumentMetrics *	documentMetrics = `nullptr`,
		QRectF *	outerBounds = `nullptr`
	)

Calculates the space required to render the provided text in map units.

Results will be written to labelX and labelY. If the text orientation is set to rotation-based, the spaced taken to render vertically oriented text will be written to rotatedLabelX and rotatedLabelY .

Definition at line 1521 of file qgspallabeling.cpp.

◆ callout()

QgsCallout * QgsPalLayerSettings::callout ( ) const

inline

Returns the label callout renderer, responsible for drawing label callouts.

Ownership is not transferred.

See also: setCallout()

Since: QGIS 3.10

Definition at line 859 of file qgspallabeling.h.

◆ containsAdvancedEffects()

bool QgsPalLayerSettings::containsAdvancedEffects ( ) const

Returns true if any component of the label settings requires advanced effects such as blend modes, which require output in raster formats to be fully respected.

Since: QGIS 3.20

Definition at line 581 of file qgspallabeling.cpp.

◆ dataDefinedProperties() [1/2]

QgsPropertyCollection & QgsPalLayerSettings::dataDefinedProperties ( )

inline

Returns a reference to the label's property collection, used for data defined overrides.

See also: setDataDefinedProperties()

Since: QGIS 3.0

Definition at line 816 of file qgspallabeling.h.

◆ dataDefinedProperties() [2/2]

const QgsPropertyCollection & QgsPalLayerSettings::dataDefinedProperties ( ) const

inline

Returns a reference to the label's property collection, used for data defined overrides.

See also: setDataDefinedProperties(); Property

Note: not available in Python bindings

Since: QGIS 3.0

Definition at line 825 of file qgspallabeling.h.

◆ format()

const QgsTextFormat & QgsPalLayerSettings::format ( ) const

inline

Returns the label text formatting settings, e.g., font settings, buffer settings, etc.

See also: setFormat()

Since: QGIS 3.0

Definition at line 841 of file qgspallabeling.h.

◆ getLabelExpression()

QgsExpression * QgsPalLayerSettings::getLabelExpression ( )

Returns the QgsExpression for this label settings.

May be nullptr if isExpression is false.

Definition at line 605 of file qgspallabeling.cpp.

◆ labelSettingsPreviewPixmap()

QPixmap QgsPalLayerSettings::labelSettingsPreviewPixmap	(	const QgsPalLayerSettings &	settings,
		QSize	size,
		const QString &	previewText = `QString()`,
		int	padding = `0`,
		const QgsScreenProperties &	screen = `QgsScreenProperties()`
	)

static

Returns a pixmap preview for label settings.

Parameters

settings	label settings
size	target pixmap size
previewText	text to render in preview, or empty for default text
padding	space between icon edge and color ramp
screen	can be used to specify the destination screen properties for the icon. This allows the icon to be generated using the correct DPI and device pixel ratio for the target screen (since QGIS 3.32)

Since: QGIS 3.10

Definition at line 1360 of file qgspallabeling.cpp.

◆ legendString()

QString QgsPalLayerSettings::legendString ( ) const

inline

legendString

Returns: the string to show in the legend and in the preview icon

Definition at line 751 of file qgspallabeling.h.

◆ lineSettings() [1/2]

QgsLabelLineSettings & QgsPalLayerSettings::lineSettings ( )

inline

Returns the label line settings, which contain settings related to how the label engine places and formats labels for line features (or polygon features which are labeled in a "perimeter" style mode).

See also: setLineSettings()

Since: QGIS 3.16

Definition at line 888 of file qgspallabeling.h.

◆ lineSettings() [2/2]

const QgsLabelLineSettings & QgsPalLayerSettings::lineSettings ( ) const

inline

Returns the label line settings, which contain settings related to how the label engine places and formats labels for line features (or polygon features which are labeled in a "perimeter" style mode).

See also: setLineSettings()

Note: Not available in Python bindings

Since: QGIS 3.16

Definition at line 879 of file qgspallabeling.h.

◆ obstacleSettings() [1/2]

QgsLabelObstacleSettings & QgsPalLayerSettings::obstacleSettings ( )

inline

Returns the label obstacle settings.

See also: setObstacleSettings()

Since: QGIS 3.10.2

Definition at line 912 of file qgspallabeling.h.

◆ obstacleSettings() [2/2]

const QgsLabelObstacleSettings & QgsPalLayerSettings::obstacleSettings ( ) const

inline

Returns the label obstacle settings.

See also: setObstacleSettings()

Note: Not available in Python bindings

Since: QGIS 3.10.2

Definition at line 905 of file qgspallabeling.h.

◆ operator=()

Q_NOWARN_DEPRECATED_POP QgsPalLayerSettings & QgsPalLayerSettings::operator= ( const QgsPalLayerSettings & s )

copy operator - only copies the permanent members

Definition at line 280 of file qgspallabeling.cpp.

◆ placementSettings() [1/2]

QgsLabelPlacementSettings & QgsPalLayerSettings::placementSettings ( )

inline

Returns the label placement settings.

See also: setPlacementSettings()

Since: QGIS 3.26

Definition at line 956 of file qgspallabeling.h.

◆ placementSettings() [2/2]

const QgsLabelPlacementSettings & QgsPalLayerSettings::placementSettings ( ) const

inline

Returns the label placement settings.

See also: setPlacementSettings()

Note: Not available in Python bindings

Since: QGIS 3.26

Definition at line 949 of file qgspallabeling.h.

◆ polygonPlacementFlags()

Qgis::LabelPolygonPlacementFlags QgsPalLayerSettings::polygonPlacementFlags ( ) const

inline

Returns the polygon placement flags, which dictate how polygon labels can be placed.

See also: setPolygonPlacementFlags()

Since: QGIS 3.14

Definition at line 442 of file qgspallabeling.h.

◆ prepare()

bool QgsPalLayerSettings::prepare	(	QgsRenderContext &	context,
		QSet< QString > &	attributeNames,
		const QgsFields &	fields,
		const QgsMapSettings &	mapSettings,
		const QgsCoordinateReferenceSystem &	crs
	)

Prepare for registration of features.

The context, mapSettings and fields parameters give more information about the rendering environment. If target crs is not specified, the targetCrs from mapSettings will be taken. The parameter attributeNames should be updated to contain all the field names which the labeling requires for the rendering.

Since: QGIS 3.8

Definition at line 367 of file qgspallabeling.cpp.

◆ propertyDefinitions()

const QgsPropertiesDefinition & QgsPalLayerSettings::propertyDefinitions ( )

static

Returns the labeling property definitions.

Since: QGIS 3.0

Definition at line 599 of file qgspallabeling.cpp.

◆ readXml()

void QgsPalLayerSettings::readXml	(	const QDomElement &	elem,
		const QgsReadWriteContext &	context
	)

Read settings from a DOM element.

Since: QGIS 2.12

Definition at line 950 of file qgspallabeling.cpp.

◆ referencedFields()

QSet< QString > QgsPalLayerSettings::referencedFields ( const QgsRenderContext & context ) const

Returns all field names referenced by the configuration (e.g.

field name or expression, data defined properties).

Since: QGIS 3.14

Definition at line 492 of file qgspallabeling.cpp.

◆ registerFeature()

void QgsPalLayerSettings::registerFeature	(	const QgsFeature &	f,
		QgsRenderContext &	context
	)

Registers a feature for labeling.

Parameters

f	feature to label
context	render context. The QgsExpressionContext contained within the render context must have already had the feature and fields sets prior to calling this method.

Warning: This method is designed for use by PyQGIS clients only. C++ code should use the variant with additional arguments.

Definition at line 1785 of file qgspallabeling.cpp.

◆ registerFeatureWithDetails()

std::unique_ptr< QgsLabelFeature > QgsPalLayerSettings::registerFeatureWithDetails	(	const QgsFeature &	feature,
		QgsRenderContext &	context,
		QgsGeometry	obstacleGeometry = `QgsGeometry()`,
		const QgsSymbol *	symbol = `nullptr`
	)

Registers a feature for labeling.

Parameters

feature	feature to label
context	render context. The QgsExpressionContext contained within the render context must have already had the feature and fields set prior to calling this method.
obstacleGeometry	optional obstacle geometry, if a different geometry to the feature's geometry should be used as an obstacle for labels (e.g., if the feature has been rendered with an offset point symbol, the obstacle geometry should represent the bounds of the offset symbol). If not set, the feature's original geometry will be used as an obstacle for labels.
symbol	feature symbol to label (ownership is not transferred, and symbol must exist until the labeling is complete)

Returns: QgsLabelFeature representing the registered feature, or nullptr if the feature will not be labeled in this context.

Note: Not available in Python bindings

Definition at line 1790 of file qgspallabeling.cpp.

◆ rotationUnit()

Qgis::AngleUnit QgsPalLayerSettings::rotationUnit ( ) const

Unit for rotation of labels.

See also: setRotationUnit()

Since: QGIS 3.22

Definition at line 614 of file qgspallabeling.cpp.

◆ setCallout()

void QgsPalLayerSettings::setCallout ( QgsCallout * callout )

Sets the label callout renderer, responsible for drawing label callouts.

Ownership of callout is transferred to the settings.

See also: callout()

Since: QGIS 3.10

Definition at line 1355 of file qgspallabeling.cpp.

◆ setDataDefinedProperties()

void QgsPalLayerSettings::setDataDefinedProperties ( const QgsPropertyCollection & collection )

inline

Sets the label's property collection, used for data defined overrides.

Parameters

collection property collection. Existing properties will be replaced.

See also: dataDefinedProperties(); Property

Since: QGIS 3.0

Definition at line 834 of file qgspallabeling.h.

◆ setFormat()

void QgsPalLayerSettings::setFormat ( const QgsTextFormat & format )

inline

Sets the label text formatting settings, e.g., font settings, buffer settings, etc.

Parameters

format label text format

See also: format()

Since: QGIS 3.0

Definition at line 849 of file qgspallabeling.h.

◆ setLegendString()

void QgsPalLayerSettings::setLegendString ( const QString & legendString )

inline

setLegendString

Parameters

legendString the string to show in the legend and preview

Definition at line 745 of file qgspallabeling.h.

◆ setLineSettings()

void QgsPalLayerSettings::setLineSettings ( const QgsLabelLineSettings & settings )

inline

Sets the label line settings, which contain settings related to how the label engine places and formats labels for line features (or polygon features which are labeled in a "perimeter" style mode).

See also: lineSettings()

Since: QGIS 3.16

Definition at line 897 of file qgspallabeling.h.

◆ setObstacleSettings()

void QgsPalLayerSettings::setObstacleSettings ( const QgsLabelObstacleSettings & settings )

inline

Sets the label obstacle settings.

See also: obstacleSettings()

Since: QGIS 3.10.2

Definition at line 919 of file qgspallabeling.h.

◆ setPlacementSettings()

void QgsPalLayerSettings::setPlacementSettings ( const QgsLabelPlacementSettings & settings )

inline

Sets the label placement settings.

See also: placementSettings()

Since: QGIS 3.26

Definition at line 963 of file qgspallabeling.h.

◆ setPolygonPlacementFlags()

void QgsPalLayerSettings::setPolygonPlacementFlags ( Qgis::LabelPolygonPlacementFlags flags )

inline

Sets the polygon placement flags, which dictate how polygon labels can be placed.

See also: polygonPlacementFlags()

Since: QGIS 3.14

Definition at line 450 of file qgspallabeling.h.

◆ setRotationUnit()

void QgsPalLayerSettings::setRotationUnit ( Qgis::AngleUnit angleUnit )

Set unit for rotation of labels.

See also: rotationUnit()

Since: QGIS 3.22

Definition at line 619 of file qgspallabeling.cpp.

◆ setThinningSettings()

void QgsPalLayerSettings::setThinningSettings ( const QgsLabelThinningSettings & settings )

inline

Sets the label thinning settings.

See also: thinningSettings()

Since: QGIS 3.12

Definition at line 941 of file qgspallabeling.h.

◆ setUnplacedVisibility()

void QgsPalLayerSettings::setUnplacedVisibility ( Qgis::UnplacedLabelVisibility visibility )

Sets the layer's unplaced label visibility.

See also: unplacedVisibility()

Since: QGIS 3.20

Definition at line 1511 of file qgspallabeling.cpp.

◆ startRender()

void QgsPalLayerSettings::startRender ( QgsRenderContext & context )

Prepares the label settings for rendering.

This should be called before rendering any labels, and must be followed by a call to stopRender() in order to gracefully clean up symbols.

Since: QGIS 3.10

Definition at line 528 of file qgspallabeling.cpp.

◆ stopRender()

void QgsPalLayerSettings::stopRender ( QgsRenderContext & context )

Finalises the label settings after use.

This must be called after a call to startRender(), in order to gracefully clean up symbols.

Since: QGIS 3.10

Definition at line 565 of file qgspallabeling.cpp.

◆ thinningSettings() [1/2]

QgsLabelThinningSettings & QgsPalLayerSettings::thinningSettings ( )

inline

Returns the label thinning settings.

See also: setThinningSettings()

Since: QGIS 3.12

Definition at line 934 of file qgspallabeling.h.

◆ thinningSettings() [2/2]

const QgsLabelThinningSettings & QgsPalLayerSettings::thinningSettings ( ) const

inline

Returns the label thinning settings.

See also: setThinningSettings()

Note: Not available in Python bindings

Since: QGIS 3.12

Definition at line 927 of file qgspallabeling.h.

◆ unplacedVisibility()

Qgis::UnplacedLabelVisibility QgsPalLayerSettings::unplacedVisibility ( ) const

Returns the layer's unplaced label visibility.

See also: setUnplacedVisibility()

Since: QGIS 3.20

Definition at line 1506 of file qgspallabeling.cpp.

◆ writeXml()

QDomElement QgsPalLayerSettings::writeXml	(	QDomDocument &	doc,
		const QgsReadWriteContext &	context
	)		const

Write settings into a DOM element.

Since: QGIS 2.12

Definition at line 1238 of file qgspallabeling.cpp.

Friends And Related Function Documentation

◆ QgsVectorLayer

friend class QgsVectorLayer

friend

Definition at line 1008 of file qgspallabeling.h.

Member Data Documentation

◆ angleOffset

double QgsPalLayerSettings::angleOffset = 0

Label rotation, in degrees clockwise.

Definition at line 561 of file qgspallabeling.h.

◆ autoWrapLength

int QgsPalLayerSettings::autoWrapLength = 0

If non-zero, indicates that label text should be automatically wrapped to (ideally) the specified number of characters.

If zero, auto wrapping is disabled.

See also: useMaxLineLengthForAutoWrap

Since: QGIS 3.4

Definition at line 392 of file qgspallabeling.h.

◆ centroidInside

bool QgsPalLayerSettings::centroidInside = false

true if centroid positioned labels must be placed inside their corresponding feature polygon, or false if centroids which fall outside the polygon are permitted.

Definition at line 463 of file qgspallabeling.h.

◆ centroidWhole

bool QgsPalLayerSettings::centroidWhole = false

true if feature centroid should be calculated from the whole feature, or false if only the visible part of the feature should be considered.

Definition at line 456 of file qgspallabeling.h.

◆ ct

QgsCoordinateTransform QgsPalLayerSettings::ct

Definition at line 997 of file qgspallabeling.h.

◆ decimals

int QgsPalLayerSettings::decimals = 3

Number of decimal places to show for numeric labels.

formatNumbers must be true for this setting to have an effect.

See also: formatNumbers

Definition at line 422 of file qgspallabeling.h.

◆ dist

double QgsPalLayerSettings::dist = 0

Distance from feature to the label.

Units are specified via distUnits.

See also: distUnits; distMapUnitScale

Definition at line 483 of file qgspallabeling.h.

◆ distMapUnitScale

QgsMapUnitScale QgsPalLayerSettings::distMapUnitScale

Map unit scale for label feature distance.

See also: dist; distUnits

Definition at line 497 of file qgspallabeling.h.

◆ distUnits

Qgis::RenderUnit QgsPalLayerSettings::distUnits = Qgis::RenderUnit::Millimeters

Units the distance from feature to the label.

See also: dist; distMapUnitScale

Definition at line 490 of file qgspallabeling.h.

◆ drawLabels

bool QgsPalLayerSettings::drawLabels = true

Whether to draw labels for this layer.

For some layers it may be desirable to register their features as obstacles for other labels without requiring labels to be drawn for the layer itself. In this case drawLabels can be set to false and obstacle set to true, which will result in the layer acting as an obstacle but having no labels of its own.

Since: QGIS 2.12

Definition at line 345 of file qgspallabeling.h.

◆ extentGeom

QgsGeometry QgsPalLayerSettings::extentGeom

Definition at line 1001 of file qgspallabeling.h.

◆ fieldIndex

int QgsPalLayerSettings::fieldIndex = 0

Definition at line 995 of file qgspallabeling.h.

◆ fieldName

QString QgsPalLayerSettings::fieldName

Name of field (or an expression) to use for label text.

If fieldName is an expression, then isExpression should be set to true.

See also: isExpression

Definition at line 354 of file qgspallabeling.h.

◆ fitInPolygonOnly

bool QgsPalLayerSettings::fitInPolygonOnly = false

true if only labels which completely fit within a polygon are allowed.

Definition at line 476 of file qgspallabeling.h.

◆ fontLimitPixelSize

bool QgsPalLayerSettings::fontLimitPixelSize = false

true if label sizes should be limited by pixel size.

See also: fontMinPixelSize; fontMaxPixelSize

Definition at line 636 of file qgspallabeling.h.

◆ fontMaxPixelSize

int QgsPalLayerSettings::fontMaxPixelSize = 10000

Maximum pixel size for showing rendered map unit labels (1 - 10000).

See also: fontLimitPixelSize; fontMinPixelSize

Definition at line 650 of file qgspallabeling.h.

◆ fontMinPixelSize

int QgsPalLayerSettings::fontMinPixelSize = 0

Minimum pixel size for showing rendered map unit labels (1 - 1000).

See also: fontLimitPixelSize; fontMaxPixelSize

Definition at line 643 of file qgspallabeling.h.

◆ formatNumbers

bool QgsPalLayerSettings::formatNumbers = false

Set to true to format numeric label text as numbers (e.g.

inserting thousand separators and fixed number of decimal places).

See also: decimals; plusSign

Definition at line 415 of file qgspallabeling.h.

◆ geometryGenerator

QString QgsPalLayerSettings::geometryGenerator

The geometry generator expression. Null if disabled.

Definition at line 727 of file qgspallabeling.h.

◆ geometryGeneratorEnabled

bool QgsPalLayerSettings::geometryGeneratorEnabled = false

Defines if the geometry generator is enabled or not. If disabled, the standard geometry will be taken.

Definition at line 733 of file qgspallabeling.h.

◆ geometryGeneratorType

Qgis::GeometryType QgsPalLayerSettings::geometryGeneratorType = Qgis::GeometryType::Point

The type of the result geometry of the geometry generator.

Definition at line 730 of file qgspallabeling.h.

◆ isExpression

bool QgsPalLayerSettings::isExpression = false

true if this label is made from a expression string, e.g., FieldName || 'mm'

See also: fieldName

Definition at line 360 of file qgspallabeling.h.

◆ labelOffsetMapUnitScale

QgsMapUnitScale QgsPalLayerSettings::labelOffsetMapUnitScale

Map unit scale for label offset.

See also: xOffset; yOffset; offsetUnits

Definition at line 558 of file qgspallabeling.h.

◆ labelPerPart

bool QgsPalLayerSettings::labelPerPart = false

true if every part of a multi-part feature should be labeled.

If false, only the largest part will be labeled.

Definition at line 659 of file qgspallabeling.h.

◆ layerType

Qgis::GeometryType QgsPalLayerSettings::layerType = Qgis::GeometryType::Unknown

Geometry type of layers associated with these settings.

Since: QGIS 3.10

Definition at line 739 of file qgspallabeling.h.

◆ maxCurvedCharAngleIn

double QgsPalLayerSettings::maxCurvedCharAngleIn = 25.0

Maximum angle between inside curved label characters (valid range 20.0 to 60.0).

See also: maxCurvedCharAngleOut

Definition at line 584 of file qgspallabeling.h.

◆ maxCurvedCharAngleOut

double QgsPalLayerSettings::maxCurvedCharAngleOut = -25.0

Maximum angle between outside curved label characters (valid range -20.0 to -95.0)

See also: maxCurvedCharAngleIn

Definition at line 590 of file qgspallabeling.h.

◆ maximumScale

double QgsPalLayerSettings::maximumScale = 0

The maximum map scale (i.e.

most "zoomed in" scale) at which the labels will be visible. The scale value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map. A scale of 0 indicates no maximum scale visibility.

This setting is only considered if scaleVisibility is true.

See also: minimumScale; scaleVisibility

Definition at line 617 of file qgspallabeling.h.

◆ mCurFeat

const QgsFeature* QgsPalLayerSettings::mCurFeat = nullptr

Definition at line 993 of file qgspallabeling.h.

◆ mCurFields

QgsFields QgsPalLayerSettings::mCurFields

Definition at line 994 of file qgspallabeling.h.

◆ mFeatsRegPal

int QgsPalLayerSettings::mFeatsRegPal = 0

Definition at line 1004 of file qgspallabeling.h.

◆ mFeatsSendingToPal

int QgsPalLayerSettings::mFeatsSendingToPal = 0

Definition at line 1003 of file qgspallabeling.h.

◆ mFeaturesToLabel

int QgsPalLayerSettings::mFeaturesToLabel = 0

Definition at line 1002 of file qgspallabeling.h.

◆ minimumScale

double QgsPalLayerSettings::minimumScale = 0

The minimum map scale (i.e.

most "zoomed out" scale) at which the labels will be visible. The scale value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map. A scale of 0 indicates no minimum scale visibility.

This setting is only considered if scaleVisibility is true.

See also: maximumScale; scaleVisibility

Definition at line 629 of file qgspallabeling.h.

◆ multilineAlign

Qgis::LabelMultiLineAlignment QgsPalLayerSettings::multilineAlign = Qgis::LabelMultiLineAlignment::FollowPlacement

Horizontal alignment of multi-line labels.

Definition at line 407 of file qgspallabeling.h.

◆ offsetType

Qgis::LabelOffsetType QgsPalLayerSettings::offsetType = Qgis::LabelOffsetType::FromPoint

Offset type for layer (only applies in certain placement modes)

Definition at line 500 of file qgspallabeling.h.

◆ offsetUnits

Qgis::RenderUnit QgsPalLayerSettings::offsetUnits = Qgis::RenderUnit::Millimeters

Units for offsets of label.

See also: xOffset; yOffset; labelOffsetMapUnitScale

Definition at line 550 of file qgspallabeling.h.

◆ placement

Qgis::LabelPlacement QgsPalLayerSettings::placement = Qgis::LabelPlacement::AroundPoint

Label placement mode.

Definition at line 434 of file qgspallabeling.h.

◆ plusSign

bool QgsPalLayerSettings::plusSign = false

Whether '+' signs should be prepended to positive numeric labels.

formatNumbers must be true for this setting to have an effect.

See also: formatNumbers

Definition at line 429 of file qgspallabeling.h.

◆ predefinedPositionOrder

QVector< Qgis::LabelPredefinedPointPosition > QgsPalLayerSettings::predefinedPositionOrder

Ordered list of predefined label positions for points.

Positions earlier in the list will be prioritized over later positions. Only used when the placement is set to QgsPalLayerSettings::OrderedPositionsAroundPoint.

Note: not available in Python bindings

Definition at line 471 of file qgspallabeling.h.

◆ preserveRotation

bool QgsPalLayerSettings::preserveRotation = true

True if label rotation should be preserved during label pin/unpin operations.

Definition at line 564 of file qgspallabeling.h.

◆ previewBkgrdColor

Q_DECL_DEPRECATED QColor QgsPalLayerSettings::previewBkgrdColor = Qt::white

Deprecated:: since QGIS 3.10. Use QgsTextFormat::previewBackgroundColor() instead.

Definition at line 370 of file qgspallabeling.h.

◆ priority

int QgsPalLayerSettings::priority = 5

Label priority.

Valid ranges are from 0 to 10, where 0 = lowest priority and 10 = highest priority.

Definition at line 596 of file qgspallabeling.h.

◆ ptOne

QgsPointXY QgsPalLayerSettings::ptOne

Definition at line 1000 of file qgspallabeling.h.

◆ ptZero

QgsPointXY QgsPalLayerSettings::ptZero

Definition at line 999 of file qgspallabeling.h.

◆ quadOffset

Qgis::LabelQuadrantPosition QgsPalLayerSettings::quadOffset = Qgis::LabelQuadrantPosition::Over

Sets the quadrant in which to offset labels from feature.

Definition at line 526 of file qgspallabeling.h.

◆ repeatDistance

double QgsPalLayerSettings::repeatDistance = 0

Distance for repeating labels for a single feature.

See also: repeatDistanceUnit; repeatDistanceMapUnitScale

Definition at line 507 of file qgspallabeling.h.

◆ repeatDistanceMapUnitScale

QgsMapUnitScale QgsPalLayerSettings::repeatDistanceMapUnitScale

Map unit scale for repeating labels for a single feature.

See also: repeatDistance; repeatDistanceUnit

Definition at line 521 of file qgspallabeling.h.

◆ repeatDistanceUnit

Qgis::RenderUnit QgsPalLayerSettings::repeatDistanceUnit = Qgis::RenderUnit::Millimeters

Units for repeating labels for a single feature.

See also: repeatDistance; repeatDistanceMapUnitScale

Definition at line 514 of file qgspallabeling.h.

◆ scaleVisibility

bool QgsPalLayerSettings::scaleVisibility = false

Set to true to limit label visibility to a range of scales.

See also: maximumScale; minimumScale

Definition at line 605 of file qgspallabeling.h.

◆ substitutions

QgsStringReplacementCollection QgsPalLayerSettings::substitutions

Substitution collection for automatic text substitution with labels.

Definition at line 373 of file qgspallabeling.h.

◆ upsidedownLabels

Qgis::UpsideDownLabelHandling QgsPalLayerSettings::upsidedownLabels = Qgis::UpsideDownLabelHandling::FlipUpsideDownLabels

Controls whether upside down labels are displayed and how they are handled.

Definition at line 653 of file qgspallabeling.h.

◆ useMaxLineLengthForAutoWrap

bool QgsPalLayerSettings::useMaxLineLengthForAutoWrap = true

If true, indicates that when auto wrapping label text the autoWrapLength length indicates the maximum ideal length of text lines.

If false, then autoWrapLength indicates the ideal minimum length of text lines.

If autoWrapLength is 0 then this value has no effect.

See also: autoWrapLength

Since: QGIS 3.4

Definition at line 404 of file qgspallabeling.h.

◆ useSubstitutions

bool QgsPalLayerSettings::useSubstitutions = false

True if substitutions should be applied.

Definition at line 375 of file qgspallabeling.h.

◆ wrapChar

QString QgsPalLayerSettings::wrapChar

Wrapping character string.

If set, any occurrences of this string in the calculated label text will be replaced with new line characters.

Definition at line 383 of file qgspallabeling.h.

◆ xform

const QgsMapToPixel* QgsPalLayerSettings::xform = nullptr

Definition at line 996 of file qgspallabeling.h.

◆ xOffset

double QgsPalLayerSettings::xOffset = 0

Horizontal offset of label.

Units are specified via offsetUnits.

See also: yOffset; offsetUnits; labelOffsetMapUnitScale

Definition at line 534 of file qgspallabeling.h.

◆ yOffset

double QgsPalLayerSettings::yOffset = 0

Vertical offset of label.

Units are specified via offsetUnits.

See also: xOffset; offsetUnits; labelOffsetMapUnitScale

Definition at line 542 of file qgspallabeling.h.

◆ zIndex

double QgsPalLayerSettings::zIndex = 0

Z-Index of label, where labels with a higher z-index are rendered on top of labels with a lower z-index.

Definition at line 724 of file qgspallabeling.h.

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

/build/qgis-3.32.0+99sid/src/core/labeling/qgspallabeling.h
/build/qgis-3.32.0+99sid/src/core/labeling/qgspallabeling.cpp

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ DirectionSymbols

◆ LinePlacementFlags

◆ ObstacleType

◆ Property

Constructor & Destructor Documentation

◆ QgsPalLayerSettings() [1/2]

◆ QgsPalLayerSettings() [2/2]

◆ ~QgsPalLayerSettings()

Member Function Documentation

◆ calculateLabelSize()

◆ callout()

◆ containsAdvancedEffects()

◆ dataDefinedProperties() [1/2]

◆ dataDefinedProperties() [2/2]

◆ format()

◆ getLabelExpression()

◆ labelSettingsPreviewPixmap()

◆ legendString()

◆ lineSettings() [1/2]

◆ lineSettings() [2/2]

◆ obstacleSettings() [1/2]

◆ obstacleSettings() [2/2]

◆ operator=()

◆ placementSettings() [1/2]

◆ placementSettings() [2/2]

◆ polygonPlacementFlags()

◆ prepare()

◆ propertyDefinitions()

◆ readXml()

◆ referencedFields()

◆ registerFeature()

◆ registerFeatureWithDetails()

◆ rotationUnit()

◆ setCallout()

◆ setDataDefinedProperties()

◆ setFormat()

◆ setLegendString()

◆ setLineSettings()

◆ setObstacleSettings()

◆ setPlacementSettings()

◆ setPolygonPlacementFlags()

◆ setRotationUnit()

◆ setThinningSettings()

◆ setUnplacedVisibility()

◆ startRender()

◆ stopRender()

◆ thinningSettings() [1/2]

◆ thinningSettings() [2/2]

◆ unplacedVisibility()

◆ writeXml()

Friends And Related Function Documentation

◆ QgsVectorLayer

Member Data Documentation

◆ angleOffset

◆ autoWrapLength

◆ centroidInside

◆ centroidWhole

◆ ct

◆ decimals

◆ dist

◆ distMapUnitScale

◆ distUnits

◆ drawLabels

◆ extentGeom

◆ fieldIndex

◆ fieldName

◆ fitInPolygonOnly

◆ fontLimitPixelSize

◆ fontMaxPixelSize

◆ fontMinPixelSize

◆ formatNumbers

◆ geometryGenerator

◆ geometryGeneratorEnabled