Abstract base class for simple marker symbol layers. More...

#include <qgsmarkersymbollayer.h>

Inheritance diagram for QgsSimpleMarkerSymbolLayerBase:

Public Member Functions
	QgsSimpleMarkerSymbolLayerBase (Qgis::MarkerShape shape=Qgis::MarkerShape::Circle, double size=DEFAULT_SIMPLEMARKER_SIZE, double angle=DEFAULT_SIMPLEMARKER_ANGLE, Qgis::ScaleMethod scaleMethod=DEFAULT_SCALE_METHOD)
	Constructor for QgsSimpleMarkerSymbolLayerBase.

	~QgsSimpleMarkerSymbolLayerBase () override

QRectF	bounds (QPointF point, QgsSymbolRenderContext &context) 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.

void	renderPoint (QPointF point, QgsSymbolRenderContext &context) override
	Renders a marker at the specified point.

void	setShape (Qgis::MarkerShape shape)
	Sets the rendered marker shape.

Qgis::MarkerShape	shape () const
	Returns the shape for the rendered marker symbol.

void	startRender (QgsSymbolRenderContext &context) override
	Called before a set of rendering operations commences on the supplied render context.

void	stopRender (QgsSymbolRenderContext &context) override
	Called after a set of rendering operations has finished on the supplied render context.

Public Member Functions inherited from QgsMarkerSymbolLayer
	QgsMarkerSymbolLayer (const QgsMarkerSymbolLayer &other)=delete
	QgsMarkerSymbolLayer cannot be copied.

double	angle () const
	Returns the rotation angle for the marker, in degrees clockwise from north.

void	drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override

virtual double	dxfAngle (QgsSymbolRenderContext &context) const override
	Gets angle.

virtual double	dxfSize (const QgsDxfExport &e, QgsSymbolRenderContext &context) const override
	Gets marker size.

HorizontalAnchorPoint	horizontalAnchorPoint () const
	Returns the horizontal anchor point for positioning the symbol.

QgsMapUnitScale	mapUnitScale () const override

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.

const QgsMapUnitScale &	offsetMapUnitScale () const
	Returns the map unit scale for the symbol's offset.

Qgis::RenderUnit	offsetUnit () const
	Returns the units for the symbol's offset.

QgsMarkerSymbolLayer &	operator= (const QgsMarkerSymbolLayer &other)=delete
	QgsMarkerSymbolLayer cannot be copied.

Qgis::RenderUnit	outputUnit () const override
	Returns the units to use for sizes and widths within the symbol layer.

Qgis::ScaleMethod	scaleMethod () const
	Returns the method to use for scaling the marker's size.

void	setAngle (double angle)
	Sets the rotation angle for the marker.

void	setHorizontalAnchorPoint (HorizontalAnchorPoint h)
	Sets the horizontal anchor point for positioning the symbol.

void	setLineAngle (double lineAngle)
	Sets the line angle modification for the symbol's angle.

void	setMapUnitScale (const QgsMapUnitScale &scale) override

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.

void	setOffsetMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale for the symbol's offset.

void	setOffsetUnit (Qgis::RenderUnit unit)
	Sets the units for the symbol's offset.

void	setOutputUnit (Qgis::RenderUnit unit) override
	Sets the units to use for sizes and widths within the symbol layer.

void	setScaleMethod (Qgis::ScaleMethod scaleMethod)
	Sets the method to use for scaling the marker's size.

virtual void	setSize (double size)
	Sets the symbol size.

void	setSizeMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale for the symbol's size.

void	setSizeUnit (Qgis::RenderUnit unit)
	Sets the units for the symbol's size.

void	setVerticalAnchorPoint (VerticalAnchorPoint v)
	Sets the vertical anchor point for positioning the symbol.

double	size () const
	Returns the symbol size.

const QgsMapUnitScale &	sizeMapUnitScale () const
	Returns the map unit scale for the symbol's size.

Qgis::RenderUnit	sizeUnit () const
	Returns the units for the symbol's size.

void	toSld (QDomDocument &doc, QDomElement &element, const QVariantMap &props) const override
	Saves the symbol layer as SLD.

VerticalAnchorPoint	verticalAnchorPoint () const
	Returns the vertical anchor point for positioning the symbol.

virtual void	writeSldMarker (QDomDocument &doc, QDomElement &element, const QVariantMap &props) const
	Writes the symbol layer definition as a SLD XML element.

Public Member Functions inherited from QgsSymbolLayer
	QgsSymbolLayer (const QgsSymbolLayer &other)=delete
	QgsSymbolLayer cannot be copied.

virtual	~QgsSymbolLayer ()

virtual bool	canCauseArtifactsBetweenAdjacentTiles () const
	Returns `true` if the symbol layer rendering can cause visible artifacts across a single feature when the feature is rendered as a series of adjacent map tiles each containing a portion of the feature's geometry.

virtual QgsSymbolLayer *	clone () const =0
	Shall be reimplemented by subclasses to create a deep copy of the instance.

virtual QColor	color () const
	Returns the "representative" color of the symbol layer.

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

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

virtual QColor	dxfBrushColor (QgsSymbolRenderContext &context) const
	Gets brush/fill color.

virtual Qt::BrushStyle	dxfBrushStyle () const
	Gets brush/fill style.

virtual QColor	dxfColor (QgsSymbolRenderContext &context) const
	Gets color.

virtual QVector< qreal >	dxfCustomDashPattern (Qgis::RenderUnit &unit) const
	Gets dash pattern.

virtual double	dxfOffset (const QgsDxfExport &e, QgsSymbolRenderContext &context) const
	Gets offset.

virtual Qt::PenStyle	dxfPenStyle () const
	Gets pen style.

virtual double	dxfWidth (const QgsDxfExport &e, QgsSymbolRenderContext &context) const
	Gets line width.

bool	enabled () const
	Returns `true` if symbol layer is enabled and will be drawn.

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.

virtual QColor	fillColor () const
	Returns the fill color for the symbol layer.

virtual Qgis::SymbolLayerFlags	flags () const
	Returns flags which control the symbol layer's behavior.

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

QString	id () const
	Returns symbol layer identifier This id is unique in the whole project.

virtual bool	isCompatibleWithSymbol (QgsSymbol *symbol) const
	Returns if the layer can be used below the specified symbol.

bool	isLocked () const
	Returns `true` if the symbol layer colors are locked and the layer will ignore any symbol-level color changes.

virtual QString	layerType () const =0
	Returns a string that represents this layer type.

virtual QList< QgsSymbolLayerReference >	masks () const
	Returns masks defined by this symbol layer.

virtual QString	ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const

QgsSymbolLayer &	operator= (const QgsSymbolLayer &other)=delete
	QgsSymbolLayer cannot be copied.

QgsPaintEffect *	paintEffect () const
	Returns the current paint effect for the layer.

virtual void	prepareExpressions (const QgsSymbolRenderContext &context)
	Prepares all data defined property expressions for evaluation.

virtual void	prepareMasks (const QgsSymbolRenderContext &context)
	Prepares all mask internal objects according to what is defined in context This should be called prior to calling startRender() method.

virtual QVariantMap	properties () const =0
	Should be reimplemented by subclasses to return a string map that contains the configuration information for the symbol layer.

int	renderingPass () const
	Specifies the rendering pass in which this symbol layer should be rendered.

virtual void	setColor (const QColor &color)
	Sets the "representative" color for the symbol layer.

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

virtual void	setDataDefinedProperty (Property key, const QgsProperty &property)
	Sets a data defined property for the layer.

void	setEnabled (bool enabled)
	Sets whether symbol layer is enabled and should be drawn.

virtual void	setFillColor (const QColor &color)
	Sets the fill color for the symbol layer.

void	setId (const QString &id)
	Set symbol layer identifier This id has to be unique in the whole project.

void	setLocked (bool locked)
	Sets whether the layer's colors are locked.

void	setPaintEffect (QgsPaintEffect *effect)
	Sets the current paint effect for the layer.

void	setRenderingPass (int renderingPass)
	Specifies the rendering pass in which this symbol layer should be rendered.

virtual void	setStrokeColor (const QColor &color)
	Sets the stroke color for the symbol layer.

virtual bool	setSubSymbol (QgsSymbol *symbol)
	Sets layer's subsymbol. takes ownership of the passed symbol.

void	setUserFlags (Qgis::SymbolLayerUserFlags flags)
	Sets user-controlled flags which control the symbol layer's behavior.

virtual void	startFeatureRender (const QgsFeature &feature, QgsRenderContext &context)
	Called before the layer will be rendered for a particular feature.

virtual void	stopFeatureRender (const QgsFeature &feature, QgsRenderContext &context)
	Called after the layer has been rendered for a particular feature.

virtual QColor	strokeColor () const
	Returns the stroke color for the symbol layer.

virtual QgsSymbol *	subSymbol ()
	Returns the symbol's sub symbol, if present.

Qgis::SymbolType	type () const

virtual QSet< QString >	usedAttributes (const QgsRenderContext &context) const
	Returns the set of attributes referenced by the layer.

Qgis::SymbolLayerUserFlags	userFlags () const
	Returns user-controlled flags which control the symbol layer's behavior.

virtual bool	usesMapUnits () const
	Returns `true` if the symbol layer has any components which use map unit based sizes.

virtual bool	writeDxf (QgsDxfExport &e, double mmMapUnitScaleFactor, const QString &layerName, QgsSymbolRenderContext &context, QPointF shift=QPointF(0.0, 0.0)) const
	write as DXF

Static Public Member Functions
static QList< Qgis::MarkerShape >	availableShapes ()
	Returns a list of all available shape types.

static Qgis::MarkerShape	decodeShape (const QString &name, bool *ok=nullptr)
	Attempts to decode a string representation of a shape name to the corresponding shape.

static QString	encodeShape (Qgis::MarkerShape shape)
	Encodes a shape to its string representation.

static bool	shapeIsFilled (Qgis::MarkerShape shape)
	Returns `true` if a symbol shape has a fill.

Static Public Member Functions inherited from QgsSymbolLayer
static const QgsPropertiesDefinition &	propertyDefinitions ()
	Returns the symbol layer property definitions.

Protected Member Functions
void	calculateOffsetAndRotation (QgsSymbolRenderContext &context, double scaledSize, bool &hasDataDefinedRotation, QPointF &offset, double &angle) const
	Calculates the marker offset and rotation.

double	calculateSize (QgsSymbolRenderContext &context, bool &hasDataDefinedSize) const
	Calculates the desired size of the marker, considering data defined size overrides.

bool	prepareMarkerPath (Qgis::MarkerShape symbol)
	Prepares the layer for drawing the specified shape (QPainterPath version)

bool	prepareMarkerShape (Qgis::MarkerShape shape)
	Prepares the layer for drawing the specified shape (QPolygonF version)

bool	shapeToPolygon (Qgis::MarkerShape shape, QPolygonF &polygon) const
	Creates a polygon representing the specified shape.

Protected Member Functions inherited from QgsMarkerSymbolLayer
	QgsMarkerSymbolLayer (bool locked=false)
	Constructor for QgsMarkerSymbolLayer.

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.

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.

void	markerOffset (QgsSymbolRenderContext &context, double width, double height, Qgis::RenderUnit widthUnit, Qgis::RenderUnit heightUnit, double &offsetX, double &offsetY, const QgsMapUnitScale &widthMapUnitScale, const QgsMapUnitScale &heightMapUnitScale) const

Protected Member Functions inherited from QgsSymbolLayer
	QgsSymbolLayer (Qgis::SymbolType type, bool locked=false)
	Constructor for QgsSymbolLayer.

void	copyDataDefinedProperties (QgsSymbolLayer *destLayer) const
	Copies all data defined properties of this layer to another symbol layer.

void	copyPaintEffect (QgsSymbolLayer *destLayer) const
	Copies paint effect of this layer to another symbol layer.

void	installMasks (QgsRenderContext &context, bool recursive)
	When rendering, install masks on context painter if recursive is `true` masks are installed recursively for all children symbol layers.

void	removeMasks (QgsRenderContext &context, bool recursive)
	When rendering, remove previously installed masks from context painter if recursive is `true` masks are removed recursively for all children symbol layers.

void	restoreOldDataDefinedProperties (const QVariantMap &stringMap)
	Restores older data defined properties from string map.

bool	shouldRenderUsingSelectionColor (const QgsSymbolRenderContext &context) const
	Returns `true` if the symbol layer should be rendered using the selection color from the render context.

Protected Attributes
QPainterPath	mPath
	Painter path representing shape. If mPolygon is empty then the shape is stored in mPath.

QPolygonF	mPolygon
	Polygon of points in shape. If polygon is empty then shape is using mPath.

Qgis::MarkerShape	mShape
	Symbol shape.

Protected Attributes inherited from QgsMarkerSymbolLayer
double	mAngle = 0
	Marker rotation angle, in degrees clockwise from north.

HorizontalAnchorPoint	mHorizontalAnchorPoint = HCenter
	Horizontal anchor point.

double	mLineAngle = 0
	Line rotation angle (see setLineAngle() for details)

QPointF	mOffset
	Marker offset.

QgsMapUnitScale	mOffsetMapUnitScale
	Offset map unit scale.

Qgis::RenderUnit	mOffsetUnit = Qgis::RenderUnit::Millimeters
	Offset units.

Qgis::ScaleMethod	mScaleMethod = Qgis::ScaleMethod::ScaleDiameter
	Marker size scaling method.

double	mSize = 2.0
	Marker size.

QgsMapUnitScale	mSizeMapUnitScale
	Marker size map unit scale.

Qgis::RenderUnit	mSizeUnit = Qgis::RenderUnit::Millimeters
	Marker size unit.

VerticalAnchorPoint	mVerticalAnchorPoint = VCenter
	Vertical anchor point.

Protected Attributes inherited from QgsSymbolLayer
QPainterPath	mClipPath

QColor	mColor

QgsPropertyCollection	mDataDefinedProperties

bool	mEnabled = true
	True if layer is enabled and should be drawn.

QgsFields	mFields

QString	mId

bool	mLocked = false

std::unique_ptr< QgsPaintEffect >	mPaintEffect

int	mRenderingPass = 0

Qgis::SymbolType	mType

Qgis::SymbolLayerUserFlags	mUserFlags
	User controlled flags.

Additional Inherited Members
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 , PropertyFontFamily , PropertyFontStyle , PropertyDashPatternOffset , PropertyTrimStart , PropertyTrimEnd , PropertyLineStartWidthValue , PropertyLineEndWidthValue , PropertyLineStartColorValue , PropertyLineEndColorValue , PropertyMarkerClipping , PropertyRandomOffsetX , PropertyRandomOffsetY , PropertyLineClipping }
	Data definable properties. More...

Static Protected Member Functions inherited from QgsMarkerSymbolLayer
static QPointF	_rotatedOffset (QPointF offset, double angle)
	Adjusts a marker offset to account for rotation.

Static Protected Attributes inherited from QgsSymbolLayer
static const bool	SELECT_FILL_BORDER = false
	Whether fill styles for selected features also highlight symbol stroke.

static const bool	SELECT_FILL_STYLE = false
	Whether fill styles for selected features uses symbol layer style.

static const bool	SELECTION_IS_OPAQUE = true
	Whether styles for selected features ignore symbol alpha.

Detailed Description

Abstract base class for simple marker symbol layers.

Handles creation of the symbol shapes but leaves the actual drawing of the symbols to subclasses.

Since: QGIS 2.16

Definition at line 46 of file qgsmarkersymbollayer.h.

Constructor & Destructor Documentation

◆ QgsSimpleMarkerSymbolLayerBase()

QgsSimpleMarkerSymbolLayerBase::QgsSimpleMarkerSymbolLayerBase	(	Qgis::MarkerShape	shape = `Qgis::MarkerShape::Circle`,
		double	size = `DEFAULT_SIMPLEMARKER_SIZE`,
		double	angle = `DEFAULT_SIMPLEMARKER_ANGLE`,
		Qgis::ScaleMethod	scaleMethod = `DEFAULT_SCALE_METHOD`
	)

Constructor for QgsSimpleMarkerSymbolLayerBase.

Parameters

shape	symbol shape for markers
size	symbol size (in mm)
angle	symbol rotation angle
scaleMethod	scaling method for data defined scaling

Definition at line 109 of file qgsmarkersymbollayer.cpp.

◆ ~QgsSimpleMarkerSymbolLayerBase()

QgsSimpleMarkerSymbolLayerBase::~QgsSimpleMarkerSymbolLayerBase ( )

overridedefault

Member Function Documentation

◆ availableShapes()

QList< Qgis::MarkerShape > QgsSimpleMarkerSymbolLayerBase::availableShapes ( )

static

Returns a list of all available shape types.

Definition at line 65 of file qgsmarkersymbollayer.cpp.

◆ bounds()

QRectF QgsSimpleMarkerSymbolLayerBase::bounds	(	QPointF	point,
		QgsSymbolRenderContext &	context
	)

overridevirtual

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 304 of file qgsmarkersymbollayer.cpp.

◆ calculateOffsetAndRotation()

void QgsSimpleMarkerSymbolLayerBase::calculateOffsetAndRotation	(	QgsSymbolRenderContext &	context,
		double	scaledSize,
		bool &	hasDataDefinedRotation,
		QPointF &	offset,
		double &	angle
	)		const

protected

Calculates the marker offset and rotation.

Parameters

context	symbol render context
scaledSize	size of symbol to render
hasDataDefinedRotation	will be set to `true` if marker has data defined rotation
offset	will be set to calculated marker offset (in painter units)
angle	will be set to calculated marker angle

Definition at line 922 of file qgsmarkersymbollayer.cpp.

◆ calculateSize()

double QgsSimpleMarkerSymbolLayerBase::calculateSize	(	QgsSymbolRenderContext &	context,
		bool &	hasDataDefinedSize
	)		const

protected

Calculates the desired size of the marker, considering data defined size overrides.

Parameters

context	symbol render context
hasDataDefinedSize	will be set to `true` if marker uses data defined sizes

Returns: marker size, in original size units

Definition at line 894 of file qgsmarkersymbollayer.cpp.

◆ decodeShape()

Qgis::MarkerShape QgsSimpleMarkerSymbolLayerBase::decodeShape	(	const QString &	name,
		bool *	ok = `nullptr`
	)

static

Attempts to decode a string representation of a shape name to the corresponding shape.

Parameters

name	encoded shape name
ok	if specified, will be set to `true` if shape was successfully decoded

Returns: decoded name

See also: encodeShape()

Definition at line 330 of file qgsmarkersymbollayer.cpp.

◆ encodeShape()

QString QgsSimpleMarkerSymbolLayerBase::encodeShape ( Qgis::MarkerShape shape )

static

Encodes a shape to its string representation.

Parameters

shape shape to encode

Returns: encoded string

See also: decodeShape()

Definition at line 416 of file qgsmarkersymbollayer.cpp.

◆ prepareMarkerPath()

bool QgsSimpleMarkerSymbolLayerBase::prepareMarkerPath ( Qgis::MarkerShape symbol )

protected

Prepares the layer for drawing the specified shape (QPainterPath version)

Definition at line 787 of file qgsmarkersymbollayer.cpp.

◆ prepareMarkerShape()

bool QgsSimpleMarkerSymbolLayerBase::prepareMarkerShape ( Qgis::MarkerShape shape )

protected

Prepares the layer for drawing the specified shape (QPolygonF version)

Definition at line 498 of file qgsmarkersymbollayer.cpp.

◆ renderPoint()

void QgsSimpleMarkerSymbolLayerBase::renderPoint	(	QPointF	point,
		QgsSymbolRenderContext &	context
	)

overridevirtual

Renders a marker at the specified point.

Derived classes must implement this to handle drawing the point.

Parameters

point	position at which to render point, in painter units
context	symbol render context

Implements QgsMarkerSymbolLayer.

Definition at line 218 of file qgsmarkersymbollayer.cpp.

◆ setShape()

void QgsSimpleMarkerSymbolLayerBase::setShape ( Qgis::MarkerShape shape )

inline

Sets the rendered marker shape.

Parameters

shape new marker shape

See also: shape()

Definition at line 86 of file qgsmarkersymbollayer.h.

◆ shape()

Qgis::MarkerShape QgsSimpleMarkerSymbolLayerBase::shape ( ) const

inline

Returns the shape for the rendered marker symbol.

See also: setShape()

Definition at line 79 of file qgsmarkersymbollayer.h.

◆ shapeIsFilled()

bool QgsSimpleMarkerSymbolLayerBase::shapeIsFilled ( Qgis::MarkerShape shape )

static

Returns true if a symbol shape has a fill.

Parameters

shape shape to test

Returns: true if shape uses a fill, or false if shape uses lines only

Definition at line 122 of file qgsmarkersymbollayer.cpp.

◆ shapeToPolygon()

bool QgsSimpleMarkerSymbolLayerBase::shapeToPolygon	(	Qgis::MarkerShape	shape,
		QPolygonF &	polygon
	)		const

protected

Creates a polygon representing the specified shape.

Parameters

shape	shape to create
polygon	destination polygon for shape

Returns: true if shape was successfully stored in polygon

Definition at line 503 of file qgsmarkersymbollayer.cpp.

◆ startRender()

void QgsSimpleMarkerSymbolLayerBase::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 170 of file qgsmarkersymbollayer.cpp.

◆ stopRender()

void QgsSimpleMarkerSymbolLayerBase::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 213 of file qgsmarkersymbollayer.cpp.

Member Data Documentation

◆ mPath

QPainterPath QgsSimpleMarkerSymbolLayerBase::mPath

protected

Painter path representing shape. If mPolygon is empty then the shape is stored in mPath.

Definition at line 153 of file qgsmarkersymbollayer.h.

◆ mPolygon

QPolygonF QgsSimpleMarkerSymbolLayerBase::mPolygon

protected

Polygon of points in shape. If polygon is empty then shape is using mPath.

Definition at line 150 of file qgsmarkersymbollayer.h.

◆ mShape

Qgis::MarkerShape QgsSimpleMarkerSymbolLayerBase::mShape

protected

Symbol shape.

Definition at line 156 of file qgsmarkersymbollayer.h.

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

/build/qgis-3.34.0+99sid/src/core/symbology/qgsmarkersymbollayer.h
/build/qgis-3.34.0+99sid/src/core/symbology/qgsmarkersymbollayer.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsSimpleMarkerSymbolLayerBase()

◆ ~QgsSimpleMarkerSymbolLayerBase()

Member Function Documentation

◆ availableShapes()

◆ bounds()

◆ calculateOffsetAndRotation()

◆ calculateSize()

◆ decodeShape()

◆ encodeShape()

◆ prepareMarkerPath()

◆ prepareMarkerShape()

◆ renderPoint()

◆ setShape()

◆ shape()

◆ shapeIsFilled()

◆ shapeToPolygon()

◆ startRender()

◆ stopRender()

Member Data Documentation

◆ mPath

◆ mPolygon

◆ mShape