QGIS API Documentation  3.13.0-Master (7f54853aae)
Public Types | Public Member Functions | Static Public Member Functions | List of all members
QgsVectorFieldSymbolLayer Class Reference

A symbol layer class for displaying displacement arrows based on point layer attributes. More...

#include <qgsvectorfieldsymbollayer.h>

Inheritance diagram for QgsVectorFieldSymbolLayer:
Inheritance graph
[legend]

Public Types

enum  AngleOrientation { ClockwiseFromNorth = 0, CounterclockwiseFromEast }
 
enum  AngleUnits { Degrees = 0, Radians }
 
enum  VectorFieldType { Cartesian = 0, Polar, Height }
 
- Public Types inherited from QgsMarkerSymbolLayer
enum  HorizontalAnchorPoint { Left, HCenter, Right }
 Symbol horizontal anchor points. More...
 
enum  VerticalAnchorPoint { Top, VCenter, Bottom }
 Symbol vertical anchor points. More...
 
- Public Types inherited from QgsSymbolLayer
enum  Property {
  PropertySize = 0, PropertyAngle, PropertyName, PropertyFillColor,
  PropertyStrokeColor, PropertyStrokeWidth, PropertyStrokeStyle, PropertyOffset,
  PropertyCharacter, PropertyWidth, PropertyHeight, PropertyPreserveAspectRatio,
  PropertyFillStyle, PropertyJoinStyle, PropertySecondaryColor, PropertyLineAngle,
  PropertyLineDistance, PropertyGradientType, PropertyCoordinateMode, PropertyGradientSpread,
  PropertyGradientReference1X, PropertyGradientReference1Y, PropertyGradientReference2X, PropertyGradientReference2Y,
  PropertyGradientReference1IsCentroid, PropertyGradientReference2IsCentroid, PropertyBlurRadius, PropertyShapeburstUseWholeShape,
  PropertyShapeburstMaxDistance, PropertyShapeburstIgnoreRings, PropertyFile, PropertyDistanceX,
  PropertyDistanceY, PropertyDisplacementX, PropertyDisplacementY, PropertyOpacity,
  PropertyCustomDash, PropertyCapStyle, PropertyPlacement, PropertyInterval,
  PropertyOffsetAlongLine, PropertyAverageAngleLength, PropertyHorizontalAnchor, PropertyVerticalAnchor,
  PropertyLayerEnabled, PropertyArrowWidth, PropertyArrowStartWidth, PropertyArrowHeadLength,
  PropertyArrowHeadThickness, PropertyArrowHeadType, PropertyArrowType, PropertyOffsetX,
  PropertyOffsetY, PropertyPointCount, PropertyRandomSeed, PropertyClipPoints,
  PropertyDensityArea
}
 Data definable properties. More...
 

Public Member Functions

 QgsVectorFieldSymbolLayer ()
 
AngleOrientation angleOrientation () const
 
AngleUnits angleUnits () const
 
QRectF bounds (QPointF, QgsSymbolRenderContext &) override
 Returns the approximate bounding box of the marker symbol layer, taking into account any data defined overrides and offsets which are set for the marker layer. More...
 
QgsVectorFieldSymbolLayerclone () const override
 Shall be reimplemented by subclasses to create a deep copy of the instance. More...
 
QColor color () const override
 The fill color. More...
 
const QgsMapUnitScaledistanceMapUnitScale () const
 
QgsUnitTypes::RenderUnit distanceUnit () const
 Returns the units for the distance. More...
 
void drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override
 
bool hasDataDefinedProperties () const override
 Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties. More...
 
QString layerType () const override
 Returns a string that represents this layer type. More...
 
QgsMapUnitScale mapUnitScale () const override
 
QgsUnitTypes::RenderUnit outputUnit () const override
 Returns the units to use for sizes and widths within the symbol layer. More...
 
QgsStringMap properties () const override
 Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer. More...
 
void renderPoint (QPointF point, QgsSymbolRenderContext &context) override
 Renders a marker at the specified point. More...
 
double scale () const
 
void setAngleOrientation (AngleOrientation orientation)
 
void setAngleUnits (AngleUnits units)
 
void setColor (const QColor &color) override
 The fill color. More...
 
void setDistanceMapUnitScale (const QgsMapUnitScale &scale)
 
void setDistanceUnit (QgsUnitTypes::RenderUnit unit)
 Sets the units for the distance. More...
 
void setMapUnitScale (const QgsMapUnitScale &scale) override
 
void setOutputUnit (QgsUnitTypes::RenderUnit unit) override
 Sets the units to use for sizes and widths within the symbol layer. More...
 
void setScale (double s)
 
bool setSubSymbol (QgsSymbol *symbol) override
 Sets layer's subsymbol. takes ownership of the passed symbol. More...
 
void setVectorFieldType (VectorFieldType type)
 
void setXAttribute (const QString &attribute)
 
void setYAttribute (const QString &attribute)
 
void startRender (QgsSymbolRenderContext &context) override
 Called before a set of rendering operations commences on the supplied render context. More...
 
void stopRender (QgsSymbolRenderContext &context) override
 Called after a set of rendering operations has finished on the supplied render context. More...
 
QgsSymbolsubSymbol () override
 Returns the symbol's sub symbol, if present. More...
 
void toSld (QDomDocument &doc, QDomElement &element, const QgsStringMap &props) const override
 
QSet< QString > usedAttributes (const QgsRenderContext &context) const override
 Returns the set of attributes referenced by the layer. More...
 
VectorFieldType vectorFieldType () const
 
QString xAttribute () const
 
QString yAttribute () const
 
- Public Member Functions inherited from QgsMarkerSymbolLayer
 QgsMarkerSymbolLayer (const QgsMarkerSymbolLayer &other)=delete
 QgsMarkerSymbolLayer cannot be copied. More...
 
double angle () const
 Returns the rotation angle for the marker, in degrees clockwise from north. More...
 
HorizontalAnchorPoint horizontalAnchorPoint () const
 Returns the horizontal anchor point for positioning the symbol. More...
 
QPointF offset () const
 Returns the marker's offset, which is the horizontal and vertical displacement which the rendered marker will have from the original feature's geometry. More...
 
const QgsMapUnitScaleoffsetMapUnitScale () const
 Returns the map unit scale for the symbol's offset. More...
 
QgsUnitTypes::RenderUnit offsetUnit () const
 Returns the units for the symbol's offset. More...
 
QgsMarkerSymbolLayeroperator= (const QgsMarkerSymbolLayer &other)=delete
 QgsMarkerSymbolLayer cannot be copied. More...
 
QgsSymbol::ScaleMethod scaleMethod () const
 Returns the method to use for scaling the marker's size. More...
 
void setAngle (double angle)
 Sets the rotation angle for the marker. More...
 
void setHorizontalAnchorPoint (HorizontalAnchorPoint h)
 Sets the horizontal anchor point for positioning the symbol. More...
 
void setLineAngle (double lineAngle)
 Sets the line angle modification for the symbol's angle. More...
 
void setOffset (QPointF offset)
 Sets the marker's offset, which is the horizontal and vertical displacement which the rendered marker should have from the original feature's geometry. More...
 
void setOffsetMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale for the symbol's offset. More...
 
void setOffsetUnit (QgsUnitTypes::RenderUnit unit)
 Sets the units for the symbol's offset. More...
 
void setScaleMethod (QgsSymbol::ScaleMethod scaleMethod)
 Sets the method to use for scaling the marker's size. More...
 
virtual void setSize (double size)
 Sets the symbol size. More...
 
void setSizeMapUnitScale (const QgsMapUnitScale &scale)
 Sets the map unit scale for the symbol's size. More...
 
void setSizeUnit (QgsUnitTypes::RenderUnit unit)
 Sets the units for the symbol's size. More...
 
void setVerticalAnchorPoint (VerticalAnchorPoint v)
 Sets the vertical anchor point for positioning the symbol. More...
 
double size () const
 Returns the symbol size. More...
 
const QgsMapUnitScalesizeMapUnitScale () const
 Returns the map unit scale for the symbol's size. More...
 
QgsUnitTypes::RenderUnit sizeUnit () const
 Returns the units for the symbol's size. More...
 
VerticalAnchorPoint verticalAnchorPoint () const
 Returns the vertical anchor point for positioning the symbol. More...
 
virtual void writeSldMarker (QDomDocument &doc, QDomElement &element, const QgsStringMap &props) const
 Writes the symbol layer definition as a SLD XML element. More...
 
- Public Member Functions inherited from QgsSymbolLayer
 QgsSymbolLayer (const QgsSymbolLayer &other)=delete
 QgsSymbolLayer cannot be copied. More...
 
virtual ~QgsSymbolLayer ()
 
QgsPropertyCollectiondataDefinedProperties ()
 Returns a reference to the symbol layer's property collection, used for data defined overrides. More...
 
const QgsPropertyCollectiondataDefinedProperties () const
 Returns a reference to the symbol layer's property collection, used for data defined overrides. More...
 
virtual double dxfAngle (QgsSymbolRenderContext &context) const
 Gets angle. More...
 
virtual QColor dxfBrushColor (QgsSymbolRenderContext &context) const
 Gets brush/fill color. More...
 
virtual Qt::BrushStyle dxfBrushStyle () const
 Gets brush/fill style. More...
 
virtual QColor dxfColor (QgsSymbolRenderContext &context) const
 Gets color. More...
 
virtual QVector< qreal > dxfCustomDashPattern (QgsUnitTypes::RenderUnit &unit) const
 Gets dash pattern. More...
 
virtual double dxfOffset (const QgsDxfExport &e, QgsSymbolRenderContext &context) const
 Gets offset. More...
 
virtual Qt::PenStyle dxfPenStyle () const
 Gets pen style. More...
 
virtual double dxfWidth (const QgsDxfExport &e, QgsSymbolRenderContext &context) const
 Gets line width. More...
 
bool enabled () const
 Returns true if symbol layer is enabled and will be drawn. More...
 
virtual double estimateMaxBleed (const QgsRenderContext &context) const
 Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context. More...
 
virtual QColor fillColor () const
 Gets fill color. More...
 
virtual bool isCompatibleWithSymbol (QgsSymbol *symbol) const
 Returns if the layer can be used below the specified symbol. More...
 
bool isLocked () const
 
virtual QgsSymbolLayerReferenceList masks () const
 Returns masks defined by this symbol layer. More...
 
virtual QString ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const
 
QgsSymbolLayeroperator= (const QgsSymbolLayer &other)=delete
 QgsSymbolLayer cannot be copied. More...
 
QgsPaintEffectpaintEffect () const
 Returns the current paint effect for the layer. More...
 
virtual void prepareExpressions (const QgsSymbolRenderContext &context)
 Prepares all data defined property expressions for evaluation. More...
 
int renderingPass () const
 Specifies the rendering pass in which this symbol layer should be rendered. More...
 
void setDataDefinedProperties (const QgsPropertyCollection &collection)
 Sets the symbol layer's property collection, used for data defined overrides. More...
 
virtual void setDataDefinedProperty (Property key, const QgsProperty &property)
 Sets a data defined property for the layer. More...
 
void setEnabled (bool enabled)
 Sets whether symbol layer is enabled and should be drawn. More...
 
virtual void setFillColor (const QColor &color)
 Set fill color. More...
 
void setLocked (bool locked)
 
void setPaintEffect (QgsPaintEffect *effect)
 Sets the current paint effect for the layer. More...
 
void setRenderingPass (int renderingPass)
 Specifies the rendering pass in which this symbol layer should be rendered. More...
 
virtual void setStrokeColor (const QColor &color)
 Set stroke color. More...
 
virtual void startFeatureRender (const QgsFeature &feature, QgsRenderContext &context)
 Called before the layer will be rendered for a particular feature. More...
 
virtual void stopFeatureRender (const QgsFeature &feature, QgsRenderContext &context)
 Called after the layer has been rendered for a particular feature. More...
 
virtual QColor strokeColor () const
 Gets stroke color. More...
 
QgsSymbol::SymbolType type () const
 
virtual bool writeDxf (QgsDxfExport &e, double mmMapUnitScaleFactor, const QString &layerName, QgsSymbolRenderContext &context, QPointF shift=QPointF(0.0, 0.0)) const
 write as DXF More...
 

Static Public Member Functions

static QgsSymbolLayercreate (const QgsStringMap &properties=QgsStringMap())
 
static QgsSymbolLayercreateFromSld (QDomElement &element)
 
- Static Public Member Functions inherited from QgsSymbolLayer
static const QgsPropertiesDefinitionpropertyDefinitions ()
 Returns the symbol layer property definitions. More...
 

Additional Inherited Members

- Protected Member Functions inherited from QgsMarkerSymbolLayer
 QgsMarkerSymbolLayer (bool locked=false)
 Constructor for QgsMarkerSymbolLayer. More...
 
void markerOffset (QgsSymbolRenderContext &context, double &offsetX, double &offsetY) const
 Calculates the required marker offset, including both the symbol offset and any displacement required to align with the marker's anchor point. More...
 
void markerOffset (QgsSymbolRenderContext &context, double width, double height, double &offsetX, double &offsetY) const
 Calculates the required marker offset, including both the symbol offset and any displacement required to align with the marker's anchor point. More...
 
void markerOffset (QgsSymbolRenderContext &context, double width, double height, QgsUnitTypes::RenderUnit widthUnit, QgsUnitTypes::RenderUnit heightUnit, double &offsetX, double &offsetY, const QgsMapUnitScale &widthMapUnitScale, const QgsMapUnitScale &heightMapUnitScale) const
 
- Protected Member Functions inherited from QgsSymbolLayer
 QgsSymbolLayer (QgsSymbol::SymbolType type, bool locked=false)
 
void copyDataDefinedProperties (QgsSymbolLayer *destLayer) const
 Copies all data defined properties of this layer to another symbol layer. More...
 
void copyPaintEffect (QgsSymbolLayer *destLayer) const
 Copies paint effect of this layer to another symbol layer. More...
 
void restoreOldDataDefinedProperties (const QgsStringMap &stringMap)
 Restores older data defined properties from string map. More...
 
- Static Protected Member Functions inherited from QgsMarkerSymbolLayer
static QPointF _rotatedOffset (QPointF offset, double angle)
 Adjusts a marker offset to account for rotation. More...
 
- Protected Attributes inherited from QgsMarkerSymbolLayer
double mAngle = 0
 Marker rotation angle, in degrees clockwise from north. More...
 
HorizontalAnchorPoint mHorizontalAnchorPoint = HCenter
 Horizontal anchor point. More...
 
double mLineAngle = 0
 Line rotation angle (see setLineAngle() for details) More...
 
QPointF mOffset
 Marker offset. More...
 
QgsMapUnitScale mOffsetMapUnitScale
 Offset map unit scale. More...
 
QgsUnitTypes::RenderUnit mOffsetUnit = QgsUnitTypes::RenderMillimeters
 Offset units. More...
 
QgsSymbol::ScaleMethod mScaleMethod = QgsSymbol::ScaleDiameter
 Marker size scaling method. More...
 
double mSize = 2.0
 Marker size. More...
 
QgsMapUnitScale mSizeMapUnitScale
 Marker size map unit scale. More...
 
QgsUnitTypes::RenderUnit mSizeUnit = QgsUnitTypes::RenderMillimeters
 Marker size unit. More...
 
VerticalAnchorPoint mVerticalAnchorPoint = VCenter
 Vertical anchor point. More...
 
- Protected Attributes inherited from QgsSymbolLayer
QColor mColor
 
QgsPropertyCollection mDataDefinedProperties
 
bool mEnabled = true
 True if layer is enabled and should be drawn. More...
 
QgsFields mFields
 
bool mLocked = false
 
std::unique_ptr< QgsPaintEffectmPaintEffect
 
int mRenderingPass = 0
 
QgsSymbol::SymbolType mType
 
- Static Protected Attributes inherited from QgsSymbolLayer
static const bool SELECT_FILL_BORDER = false
 Whether fill styles for selected features also highlight symbol stroke. More...
 
static const bool SELECT_FILL_STYLE = false
 Whether fill styles for selected features uses symbol layer style. More...
 
static const bool SELECTION_IS_OPAQUE = true
 Whether styles for selected features ignore symbol alpha. More...
 

Detailed Description

A symbol layer class for displaying displacement arrows based on point layer attributes.

Definition at line 28 of file qgsvectorfieldsymbollayer.h.

Member Enumeration Documentation

◆ AngleOrientation

Enumerator
ClockwiseFromNorth 
CounterclockwiseFromEast 

Definition at line 38 of file qgsvectorfieldsymbollayer.h.

◆ AngleUnits

Enumerator
Degrees 
Radians 

Definition at line 44 of file qgsvectorfieldsymbollayer.h.

◆ VectorFieldType

Enumerator
Cartesian 
Polar 
Height 

Definition at line 31 of file qgsvectorfieldsymbollayer.h.

Constructor & Destructor Documentation

◆ QgsVectorFieldSymbolLayer()

QgsVectorFieldSymbolLayer::QgsVectorFieldSymbolLayer ( )

Definition at line 23 of file qgsvectorfieldsymbollayer.cpp.

Member Function Documentation

◆ angleOrientation()

AngleOrientation QgsVectorFieldSymbolLayer::angleOrientation ( ) const
inline

Definition at line 87 of file qgsvectorfieldsymbollayer.h.

◆ angleUnits()

AngleUnits QgsVectorFieldSymbolLayer::angleUnits ( ) const
inline

Definition at line 89 of file qgsvectorfieldsymbollayer.h.

◆ bounds()

QRectF QgsVectorFieldSymbolLayer::bounds ( QPointF  point,
QgsSymbolRenderContext context 
)
inlineoverridevirtual

Returns the approximate bounding box of the marker symbol layer, taking into account any data defined overrides and offsets which are set for the marker layer.

Returns
approximate symbol bounds, in painter units
Since
QGIS 2.14

Implements QgsMarkerSymbolLayer.

Definition at line 114 of file qgsvectorfieldsymbollayer.h.

◆ clone()

QgsVectorFieldSymbolLayer * QgsVectorFieldSymbolLayer::clone ( ) const
overridevirtual

Shall be reimplemented by subclasses to create a deep copy of the instance.

Implements QgsSymbolLayer.

Definition at line 219 of file qgsvectorfieldsymbollayer.cpp.

◆ color()

QColor QgsVectorFieldSymbolLayer::color ( ) const
overridevirtual

The fill color.

Reimplemented from QgsSymbolLayer.

Definition at line 328 of file qgsvectorfieldsymbollayer.cpp.

◆ create()

QgsSymbolLayer * QgsVectorFieldSymbolLayer::create ( const QgsStringMap properties = QgsStringMap())
static

Definition at line 58 of file qgsvectorfieldsymbollayer.cpp.

◆ createFromSld()

QgsSymbolLayer * QgsVectorFieldSymbolLayer::createFromSld ( QDomElement &  element)
static

Definition at line 255 of file qgsvectorfieldsymbollayer.cpp.

◆ distanceMapUnitScale()

const QgsMapUnitScale& QgsVectorFieldSymbolLayer::distanceMapUnitScale ( ) const
inline

Definition at line 111 of file qgsvectorfieldsymbollayer.h.

◆ distanceUnit()

QgsUnitTypes::RenderUnit QgsVectorFieldSymbolLayer::distanceUnit ( ) const
inline

Returns the units for the distance.

See also
setDistanceUnit()

Definition at line 108 of file qgsvectorfieldsymbollayer.h.

◆ drawPreviewIcon()

void QgsVectorFieldSymbolLayer::drawPreviewIcon ( QgsSymbolRenderContext context,
QSize  size 
)
overridevirtual

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 261 of file qgsvectorfieldsymbollayer.cpp.

◆ hasDataDefinedProperties()

bool QgsVectorFieldSymbolLayer::hasDataDefinedProperties ( ) const
overridevirtual

Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties.

Since
QGIS 3.4.5

Reimplemented from QgsSymbolLayer.

Definition at line 287 of file qgsvectorfieldsymbollayer.cpp.

◆ layerType()

QString QgsVectorFieldSymbolLayer::layerType ( ) const
inlineoverridevirtual

Returns a string that represents this layer type.

Used for serialization. Should match with the string used to register this symbol layer in the registry.

Implements QgsSymbolLayer.

Definition at line 55 of file qgsvectorfieldsymbollayer.h.

◆ mapUnitScale()

QgsMapUnitScale QgsVectorFieldSymbolLayer::mapUnitScale ( ) const
overridevirtual

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 49 of file qgsvectorfieldsymbollayer.cpp.

◆ outputUnit()

QgsUnitTypes::RenderUnit QgsVectorFieldSymbolLayer::outputUnit ( ) const
overridevirtual

Returns the units to use for sizes and widths within the symbol layer.

Individual symbol layer subclasses will interpret this in different ways, e.g., a marker symbol layer may use it to specify the units for the marker size, while a line symbol layer may use it to specify the units for the line width.

Returns
output unit, or QgsUnitTypes::RenderUnknownUnit if the symbol layer contains mixed units
See also
setOutputUnit()

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 34 of file qgsvectorfieldsymbollayer.cpp.

◆ properties()

QgsStringMap QgsVectorFieldSymbolLayer::properties ( ) const
overridevirtual

Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer.

This is used to serialize a symbol layer perstistently.

Implements QgsSymbolLayer.

Definition at line 229 of file qgsvectorfieldsymbollayer.cpp.

◆ renderPoint()

void QgsVectorFieldSymbolLayer::renderPoint ( QPointF  point,
QgsSymbolRenderContext context 
)
overridevirtual

Renders a marker at the specified point.

Derived classes must implement this to handle drawing the point.

Parameters
pointposition at which to render point, in painter units
contextsymbol render context

Implements QgsMarkerSymbolLayer.

Definition at line 130 of file qgsvectorfieldsymbollayer.cpp.

◆ scale()

double QgsVectorFieldSymbolLayer::scale ( ) const
inline

Definition at line 83 of file qgsvectorfieldsymbollayer.h.

◆ setAngleOrientation()

void QgsVectorFieldSymbolLayer::setAngleOrientation ( AngleOrientation  orientation)
inline

Definition at line 86 of file qgsvectorfieldsymbollayer.h.

◆ setAngleUnits()

void QgsVectorFieldSymbolLayer::setAngleUnits ( AngleUnits  units)
inline

Definition at line 88 of file qgsvectorfieldsymbollayer.h.

◆ setColor()

void QgsVectorFieldSymbolLayer::setColor ( const QColor &  color)
overridevirtual

The fill color.

Reimplemented from QgsSymbolLayer.

Definition at line 320 of file qgsvectorfieldsymbollayer.cpp.

◆ setDistanceMapUnitScale()

void QgsVectorFieldSymbolLayer::setDistanceMapUnitScale ( const QgsMapUnitScale scale)
inline

Definition at line 110 of file qgsvectorfieldsymbollayer.h.

◆ setDistanceUnit()

void QgsVectorFieldSymbolLayer::setDistanceUnit ( QgsUnitTypes::RenderUnit  unit)
inline

Sets the units for the distance.

Parameters
unitdistance units
See also
distanceUnit()

Definition at line 102 of file qgsvectorfieldsymbollayer.h.

◆ setMapUnitScale()

void QgsVectorFieldSymbolLayer::setMapUnitScale ( const QgsMapUnitScale scale)
overridevirtual

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 43 of file qgsvectorfieldsymbollayer.cpp.

◆ setOutputUnit()

void QgsVectorFieldSymbolLayer::setOutputUnit ( QgsUnitTypes::RenderUnit  unit)
overridevirtual

Sets the units to use for sizes and widths within the symbol layer.

Individual symbol layer subclasses will interpret this in different ways, e.g., a marker symbol layer may use it to specify the units for the marker size, while a line symbol layer may use it to specify the units for the line width.

Parameters
unitoutput units
See also
outputUnit()

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 28 of file qgsvectorfieldsymbollayer.cpp.

◆ setScale()

void QgsVectorFieldSymbolLayer::setScale ( double  s)
inline

Definition at line 82 of file qgsvectorfieldsymbollayer.h.

◆ setSubSymbol()

bool QgsVectorFieldSymbolLayer::setSubSymbol ( QgsSymbol symbol)
overridevirtual

Sets layer's subsymbol. takes ownership of the passed symbol.

Reimplemented from QgsSymbolLayer.

Definition at line 120 of file qgsvectorfieldsymbollayer.cpp.

◆ setVectorFieldType()

void QgsVectorFieldSymbolLayer::setVectorFieldType ( VectorFieldType  type)
inline

Definition at line 84 of file qgsvectorfieldsymbollayer.h.

◆ setXAttribute()

void QgsVectorFieldSymbolLayer::setXAttribute ( const QString &  attribute)
inline

Definition at line 78 of file qgsvectorfieldsymbollayer.h.

◆ setYAttribute()

void QgsVectorFieldSymbolLayer::setYAttribute ( const QString &  attribute)
inline

Definition at line 80 of file qgsvectorfieldsymbollayer.h.

◆ startRender()

void QgsVectorFieldSymbolLayer::startRender ( QgsSymbolRenderContext context)
overridevirtual

Called before a set of rendering operations commences on the supplied render context.

This is always followed by a call to stopRender() after all rendering operations have been completed.

Subclasses can use this method to prepare for a set of rendering operations, e.g. by pre-evaluating paths or images to render, and performing other one-time optimisations.

See also
startFeatureRender()
stopRender()

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 191 of file qgsvectorfieldsymbollayer.cpp.

◆ stopRender()

void QgsVectorFieldSymbolLayer::stopRender ( QgsSymbolRenderContext context)
overridevirtual

Called after a set of rendering operations has finished on the supplied render context.

This is always preceded by a call to startRender() before all rendering operations are commenced.

Subclasses can use this method to cleanup after a set of rendering operations.

See also
startRender()
stopFeatureRender()

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 211 of file qgsvectorfieldsymbollayer.cpp.

◆ subSymbol()

QgsSymbol* QgsVectorFieldSymbolLayer::subSymbol ( )
inlineoverridevirtual

Returns the symbol's sub symbol, if present.

Reimplemented from QgsSymbolLayer.

Definition at line 58 of file qgsvectorfieldsymbollayer.h.

◆ toSld()

void QgsVectorFieldSymbolLayer::toSld ( QDomDocument &  doc,
QDomElement &  element,
const QgsStringMap props 
) const
overridevirtual

Reimplemented from QgsMarkerSymbolLayer.

Definition at line 249 of file qgsvectorfieldsymbollayer.cpp.

◆ usedAttributes()

QSet< QString > QgsVectorFieldSymbolLayer::usedAttributes ( const QgsRenderContext context) const
overridevirtual

Returns the set of attributes referenced by the layer.

This includes attributes required by any data defined properties associated with the layer.

Reimplemented from QgsSymbolLayer.

Definition at line 269 of file qgsvectorfieldsymbollayer.cpp.

◆ vectorFieldType()

VectorFieldType QgsVectorFieldSymbolLayer::vectorFieldType ( ) const
inline

Definition at line 85 of file qgsvectorfieldsymbollayer.h.

◆ xAttribute()

QString QgsVectorFieldSymbolLayer::xAttribute ( ) const
inline

Definition at line 79 of file qgsvectorfieldsymbollayer.h.

◆ yAttribute()

QString QgsVectorFieldSymbolLayer::yAttribute ( ) const
inline

Definition at line 81 of file qgsvectorfieldsymbollayer.h.


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