QGIS API Documentation  3.11.0-Master (68611307d7)
Public Member Functions | Protected Attributes | List of all members
QgsTextLabelFeature Class Reference

Class that adds extra information to QgsLabelFeature for text labels. More...

#include <qgspalgeometry.h>

Inheritance diagram for QgsTextLabelFeature:
Inheritance graph
[legend]

Public Member Functions

 QgsTextLabelFeature (QgsFeatureId id, geos::unique_ptr geometry, QSizeF size)
 Construct text label feature. More...
 
 QgsTextLabelFeature (QgsFeatureId id, GEOSGeometry *geometry, const QSizeF &size)
 Construct text label feature. More...
 
 ~QgsTextLabelFeature () override
 Clean up. More...
 
 ~QgsTextLabelFeature ()
 Clean up. More...
 
void calculateInfo (bool curvedLabeling, QFontMetricsF *fm, const QgsMapToPixel *xform, double maxinangle, double maxoutangle)
 calculate data for info(). setDefinedFont() must have been called already. More...
 
void calculateInfo (bool curvedLabeling, QFontMetricsF *fm, const QgsMapToPixel *xform, double fontScale, double maxinangle, double maxoutangle)
 calculate data for info(). setDefinedFont() must have been called already. More...
 
const QMap< QgsPalLayerSettings::Property, QVariant > & dataDefinedValues () const
 Gets data-defined values. More...
 
const QMap< QgsPalLayerSettings::DataDefinedProperties, QVariant > & dataDefinedValues () const
 Gets data-defined values. More...
 
QFont definedFont ()
 Font to be used for rendering. More...
 
QFont definedFont ()
 Font to be used for rendering. More...
 
QFontMetricsF * labelFontMetrics ()
 Metrics of the font for rendering. More...
 
QFontMetricsF * labelFontMetrics ()
 Metrics of the font for rendering. More...
 
void setDataDefinedValues (const QMap< QgsPalLayerSettings::Property, QVariant > &values)
 Sets data-defined values. More...
 
void setDataDefinedValues (const QMap< QgsPalLayerSettings::DataDefinedProperties, QVariant > &values)
 Sets data-defined values. More...
 
void setDefinedFont (const QFont &f)
 Sets font to be used for rendering. More...
 
void setDefinedFont (const QFont &f)
 Sets font to be used for rendering. More...
 
QString text (int partId) const
 Returns the text component corresponding to a specified label part. More...
 
QString text (int partId) const
 Returns the text component corresponding to a specified label part. More...
 
- Public Member Functions inherited from QgsLabelFeature
 QgsLabelFeature (QgsFeatureId id, geos::unique_ptr geometry, QSizeF size)
 Create label feature, takes ownership of the geometry instance. More...
 
virtual ~QgsLabelFeature ()
 Clean up geometry and curved label info (if present) More...
 
bool alwaysShow () const
 Whether label should be always shown (sets very high label priority) More...
 
QgsPointXY anchorPosition () const
 In case of quadrand or aligned positioning, this is set to the anchor point. More...
 
QgsLabeling::LinePlacementFlags arrangementFlags () const
 Returns the feature's arrangement flags. More...
 
pal::LabelInfocurvedLabelInfo () const
 Gets additional info required for curved label placement. Returns nullptr if not set. More...
 
double distLabel () const
 Applies to "around point" placement strategy or linestring features. More...
 
QgsFeature feature () const
 Returns the original feature associated with this label. More...
 
double fixedAngle () const
 Angle in degrees of the fixed angle (relevant only if hasFixedAngle() returns true) More...
 
QgsPointXY fixedPosition () const
 Coordinates of the fixed position (relevant only if hasFixedPosition() returns true) More...
 
GEOSGeometry * geometry () const
 Gets access to the associated geometry. More...
 
bool hasFixedAngle () const
 Whether the label should use a fixed angle instead of using angle from automatic placement. More...
 
bool hasFixedPosition () const
 Whether the label should use a fixed position instead of being automatically placed. More...
 
bool hasFixedQuadrant () const
 Returns whether the quadrant for the label is fixed. More...
 
QgsFeatureId id () const
 Identifier of the label (unique within the parent label provider) More...
 
bool labelAllParts () const
 Returns true if all parts of the feature should be labeled. More...
 
QString labelText () const
 Text of the label. More...
 
pal::Layerlayer () const
 Gets PAL layer of the label feature. Should be only used internally in PAL. More...
 
const QgsLabelObstacleSettingsobstacleSettings () const
 Returns the label's obstacle settings. More...
 
QgsPalLayerSettings::OffsetType offsetType () const
 Returns the offset type, which determines how offsets and distance to label behaves. More...
 
double overrunDistance () const
 Returns the permissible distance (in map units) which labels are allowed to overrun the start or end of linear features. More...
 
double overrunSmoothDistance () const
 Returns the distance (in map units) with which the ends of linear features are averaged over when calculating the direction at which to overrun labels. More...
 
QgsGeometry permissibleZone () const
 Returns the label's permissible zone geometry. More...
 
const GEOSPreparedGeometry * permissibleZonePrepared () const
 Returns a GEOS prepared geometry representing the label's permissibleZone(). More...
 
QgsPointXY positionOffset () const
 Applies only to "offset from point" placement strategy. More...
 
QVector< QgsPalLayerSettings::PredefinedPointPositionpredefinedPositionOrder () const
 Returns the priority ordered list of predefined positions for label candidates. More...
 
double priority () const
 Returns the feature's labeling priority. More...
 
QgsAbstractLabelProviderprovider () const
 Returns provider of this instance. More...
 
QPointF quadOffset () const
 Applies to "offset from point" placement strategy and "around point" (in case hasFixedQuadrant() returns true). More...
 
double repeatDistance () const
 Applies only to linestring features - after what distance (in map units) the labels should be repeated (0 = no repetitions) More...
 
void setAlwaysShow (bool enabled)
 Sets whether label should be always shown (sets very high label priority) More...
 
void setAnchorPosition (const QgsPointXY &anchorPosition)
 In case of quadrand or aligned positioning, this is set to the anchor point. More...
 
void setArrangementFlags (QgsLabeling::LinePlacementFlags flags)
 Sets the feature's arrangement flags. More...
 
void setCurvedLabelInfo (pal::LabelInfo *info)
 takes ownership of the instance More...
 
void setDistLabel (double dist)
 Applies to "around point" placement strategy or linestring features. More...
 
void setFeature (const QgsFeature &feature)
 Sets the original feature associated with this label. More...
 
void setFixedAngle (double angle)
 Sets angle in degrees of the fixed angle (relevant only if hasFixedAngle() returns true) More...
 
void setFixedPosition (const QgsPointXY &point)
 Sets coordinates of the fixed position (relevant only if hasFixedPosition() returns true) More...
 
void setHasFixedAngle (bool enabled)
 Sets whether the label should use a fixed angle instead of using angle from automatic placement. More...
 
void setHasFixedPosition (bool enabled)
 Sets whether the label should use a fixed position instead of being automatically placed. More...
 
void setHasFixedQuadrant (bool enabled)
 Sets whether the quadrant for the label must be respected. More...
 
void setLabelAllParts (bool labelAllParts)
 Sets whether all parts of the feature should be labeled. More...
 
void setLabelText (const QString &text)
 Sets text of the label. More...
 
void setLayer (pal::Layer *layer)
 Assign PAL layer to the label feature. Should be only used internally in PAL. More...
 
void setObstacleSettings (const QgsLabelObstacleSettings &settings)
 Sets the label's obstacle settings. More...
 
void setOffsetType (QgsPalLayerSettings::OffsetType type)
 Sets the offset type, which determines how offsets and distance to label behaves. More...
 
void setOverrunDistance (double distance)
 Sets the permissible distance (in map units) which labels are allowed to overrun the start or end of linear features. More...
 
void setOverrunSmoothDistance (double distance)
 Sets the distance (in map units) with which the ends of linear features are averaged over when calculating the direction at which to overrun labels. More...
 
void setPermissibleZone (const QgsGeometry &geometry)
 Sets the label's permissible zone geometry. More...
 
void setPositionOffset (const QgsPointXY &offset)
 Applies only to "offset from point" placement strategy. More...
 
void setPredefinedPositionOrder (const QVector< QgsPalLayerSettings::PredefinedPointPosition > &order)
 Sets the priority ordered list of predefined positions for label candidates. More...
 
void setPriority (double priority)
 Sets the priority for labeling the feature. More...
 
void setQuadOffset (QPointF quadOffset)
 Set which side of the point to use. More...
 
void setRepeatDistance (double dist)
 Applies only to linestring features - set after what distance (in map units) the labels should be repeated (0 = no repetitions) More...
 
void setRotatedSize (QSizeF size)
 Sets an alternate label size to be used when a label rotation angle is between 45 to 135 and 235 to 313 degrees and the text rotation mode is set to rotation-based. More...
 
void setSymbol (const QgsSymbol *symbol)
 Sets the feature symbol associated with this label. More...
 
void setSymbolSize (QSizeF size)
 Sets the size of the rendered symbol associated with this feature. More...
 
void setVisualMargin (const QgsMargins &margin)
 Sets the visual margin for the label feature. More...
 
void setZIndex (double zIndex)
 Sets the label's z-index. More...
 
QSizeF size (double angle=0.0) const
 Size of the label (in map units) More...
 
const QgsSymbolsymbol ()
 Returns the feature symbol associated with this label. More...
 
const QSizeF & symbolSize () const
 Returns the size of the rendered symbol associated with this feature, if applicable. More...
 
const QgsMarginsvisualMargin () const
 Returns the visual margin for the label feature. More...
 
double zIndex () const
 Returns the label's z-index. More...
 

Protected Attributes

QStringList mClusters
 List of graphemes (used for curved labels) More...
 
QMap< QgsPalLayerSettings::Property, QVariant > mDataDefinedValues
 Stores attribute values for data defined properties. More...
 
QMap< QgsPalLayerSettings::DataDefinedProperties, QVariant > mDataDefinedValues
 Stores attribute values for data defined properties. More...
 
QFont mDefinedFont
 Font for rendering. More...
 
QFontMetricsF * mFontMetrics = nullptr
 Metrics of the font for rendering. More...
 
- Protected Attributes inherited from QgsLabelFeature
bool mAlwaysShow = false
 whether to always show label - even in case of collisions More...
 
QgsLabeling::LinePlacementFlags mArrangementFlags = nullptr
 
double mDistLabel = 0
 distance of label from the feature (only for "around point" placement or linestrings) More...
 
double mFixedAngle = 0
 fixed rotation for the label (instead of automatic choice) More...
 
QgsPointXY mFixedPosition
 fixed position for the label (instead of automatic placement) More...
 
geos::unique_ptr mGeometry
 Geometry of the feature to be labelled. More...
 
bool mHasFixedAngle = false
 whether mFixedAngle should be respected More...
 
bool mHasFixedPosition = false
 whether mFixedPosition should be respected More...
 
bool mHasFixedQuadrant = false
 whether mQuadOffset should be respected (only for "around point" placement) More...
 
QgsFeatureId mId
 Associated ID unique within the parent label provider. More...
 
pal::LabelInfomInfo = nullptr
 extra information for curved labels (may be nullptr) More...
 
QString mLabelText
 text of the label More...
 
pal::LayermLayer = nullptr
 Pointer to PAL layer (assigned when registered to PAL) More...
 
QgsPalLayerSettings::OffsetType mOffsetType = QgsPalLayerSettings::FromPoint
 Offset type for certain placement modes. More...
 
double mOverrunDistance = 0
 Distance to allow label to overrun linear features. More...
 
double mOverrunSmoothDistance = 0
 Distance to smooth angle of line start and end when calculating overruns. More...
 
QgsGeometry mPermissibleZone
 Optional geometry to use for label's permissible zone. More...
 
QgsPointXY mPositionOffset
 offset of label from the feature (only for "offset from point" placement) More...
 
QVector< QgsPalLayerSettings::PredefinedPointPositionmPredefinedPositionOrder
 Ordered list of predefined positions for label (only for OrderedPositionsAroundPoint placement) More...
 
double mPriority = -1
 Priority of the label. More...
 
QPointF mQuadOffset
 whether the side of the label is fixed (only for "around point" placement) More...
 
double mRepeatDistance = 0
 distance after which label should be repeated (only for linestrings) More...
 
QSizeF mRotatedSize
 Width and height of the label when rotated between 45 to 135 and 235 to 315 degrees;. More...
 
QSizeF mSize
 Width and height of the label. More...
 
QSizeF mSymbolSize
 Size of associated rendered symbol, if applicable. More...
 
QgsMargins mVisualMargin
 Visual margin of label contents. More...
 
double mZIndex = 0
 Z-index of label (higher z-index labels are rendered on top of lower z-index labels) More...
 

Detailed Description

Class that adds extra information to QgsLabelFeature for text labels.

Note
not part of public API
not available in Python bindings
not part of public API

Definition at line 30 of file qgspalgeometry.h.

Constructor & Destructor Documentation

◆ QgsTextLabelFeature() [1/2]

QgsTextLabelFeature::QgsTextLabelFeature ( QgsFeatureId  id,
GEOSGeometry *  geometry,
const QSizeF &  size 
)
inline

Construct text label feature.

Definition at line 34 of file qgspalgeometry.h.

◆ ~QgsTextLabelFeature() [1/2]

QgsTextLabelFeature::~QgsTextLabelFeature ( )
inline

Clean up.

Definition at line 42 of file qgspalgeometry.h.

◆ QgsTextLabelFeature() [2/2]

QgsTextLabelFeature::QgsTextLabelFeature ( QgsFeatureId  id,
geos::unique_ptr  geometry,
QSizeF  size 
)

Construct text label feature.

Definition at line 24 of file qgstextlabelfeature.cpp.

◆ ~QgsTextLabelFeature() [2/2]

QgsTextLabelFeature::~QgsTextLabelFeature ( )
override

Clean up.

Member Function Documentation

◆ calculateInfo() [1/2]

void QgsTextLabelFeature::calculateInfo ( bool  curvedLabeling,
QFontMetricsF *  fm,
const QgsMapToPixel xform,
double  maxinangle,
double  maxoutangle 
)

calculate data for info(). setDefinedFont() must have been called already.

Definition at line 46 of file qgstextlabelfeature.cpp.

◆ calculateInfo() [2/2]

void QgsTextLabelFeature::calculateInfo ( bool  curvedLabeling,
QFontMetricsF *  fm,
const QgsMapToPixel xform,
double  fontScale,
double  maxinangle,
double  maxoutangle 
)
inline

calculate data for info(). setDefinedFont() must have been called already.

Definition at line 62 of file qgspalgeometry.h.

◆ dataDefinedValues() [1/2]

const QMap< QgsPalLayerSettings::Property, QVariant >& QgsTextLabelFeature::dataDefinedValues ( ) const
inline

Gets data-defined values.

Definition at line 49 of file qgstextlabelfeature.h.

◆ dataDefinedValues() [2/2]

const QMap< QgsPalLayerSettings::DataDefinedProperties, QVariant >& QgsTextLabelFeature::dataDefinedValues ( ) const
inline

Gets data-defined values.

Definition at line 127 of file qgspalgeometry.h.

◆ definedFont() [1/2]

QFont QgsTextLabelFeature::definedFont ( )
inline

Font to be used for rendering.

Definition at line 56 of file qgstextlabelfeature.h.

◆ definedFont() [2/2]

QFont QgsTextLabelFeature::definedFont ( )
inline

Font to be used for rendering.

Definition at line 134 of file qgspalgeometry.h.

◆ labelFontMetrics() [1/2]

QFontMetricsF* QgsTextLabelFeature::labelFontMetrics ( )
inline

Metrics of the font for rendering.

Definition at line 59 of file qgstextlabelfeature.h.

◆ labelFontMetrics() [2/2]

QFontMetricsF* QgsTextLabelFeature::labelFontMetrics ( )
inline

Metrics of the font for rendering.

Definition at line 137 of file qgspalgeometry.h.

◆ setDataDefinedValues() [1/2]

void QgsTextLabelFeature::setDataDefinedValues ( const QMap< QgsPalLayerSettings::Property, QVariant > &  values)
inline

Sets data-defined values.

Definition at line 51 of file qgstextlabelfeature.h.

◆ setDataDefinedValues() [2/2]

void QgsTextLabelFeature::setDataDefinedValues ( const QMap< QgsPalLayerSettings::DataDefinedProperties, QVariant > &  values)
inline

Sets data-defined values.

Definition at line 129 of file qgspalgeometry.h.

◆ setDefinedFont() [1/2]

void QgsTextLabelFeature::setDefinedFont ( const QFont &  f)
inline

Sets font to be used for rendering.

Definition at line 54 of file qgstextlabelfeature.h.

◆ setDefinedFont() [2/2]

void QgsTextLabelFeature::setDefinedFont ( const QFont &  f)
inline

Sets font to be used for rendering.

Definition at line 132 of file qgspalgeometry.h.

◆ text() [1/2]

QString QgsTextLabelFeature::text ( int  partId) const

Returns the text component corresponding to a specified label part.

Parameters
partIdSet to -1 for labels which are not broken into parts (e.g., non-curved labels), or the required part index for labels which are broken into parts (curved labels)
Since
QGIS 2.10

◆ text() [2/2]

QString QgsTextLabelFeature::text ( int  partId) const
inline

Returns the text component corresponding to a specified label part.

Parameters
partIdSet to -1 for labels which are not broken into parts (e.g., non-curved labels), or the required part index for labels which are broken into parts (curved labels)
Since
QGIS 2.10

Definition at line 53 of file qgspalgeometry.h.

Member Data Documentation

◆ mClusters

QStringList QgsTextLabelFeature::mClusters
protected

List of graphemes (used for curved labels)

Definition at line 141 of file qgspalgeometry.h.

◆ mDataDefinedValues [1/2]

QMap< QgsPalLayerSettings::Property, QVariant > QgsTextLabelFeature::mDataDefinedValues
protected

Stores attribute values for data defined properties.

Definition at line 69 of file qgstextlabelfeature.h.

◆ mDataDefinedValues [2/2]

QMap< QgsPalLayerSettings::DataDefinedProperties, QVariant > QgsTextLabelFeature::mDataDefinedValues
protected

Stores attribute values for data defined properties.

Definition at line 147 of file qgspalgeometry.h.

◆ mDefinedFont

QFont QgsTextLabelFeature::mDefinedFont
protected

Font for rendering.

Definition at line 143 of file qgspalgeometry.h.

◆ mFontMetrics

QFontMetricsF * QgsTextLabelFeature::mFontMetrics = nullptr
protected

Metrics of the font for rendering.

Definition at line 145 of file qgspalgeometry.h.


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