#include <qgssymbollayer.h>

Inheritance diagram for QgsLineSymbolLayer:

[legend]

Public Types
enum	RenderRingFilter { AllRings , ExteriorRingOnly , InteriorRingsOnly }
	Options for filtering rings when the line symbol layer is being used to render a polygon's rings. 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 }
	Data definable properties. More...

Public Member Functions
	QgsLineSymbolLayer (const QgsLineSymbolLayer &other)=delete
	QgsLineSymbolLayer cannot be copied. More...

void	drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override

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

QgsMapUnitScale	mapUnitScale () const override

double	offset () const
	Returns the line's offset. More...

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

QgsUnitTypes::RenderUnit	offsetUnit () const
	Returns the units for the line's offset. More...

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

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

virtual void	renderPolygonStroke (const QPolygonF &points, const QVector< QPolygonF > *rings, QgsSymbolRenderContext &context)
	Renders the line symbol layer along the outline of polygon, using the given render context. More...

virtual void	renderPolyline (const QPolygonF &points, QgsSymbolRenderContext &context)=0
	Renders the line symbol layer along the line joining points, using the given render context. More...

RenderRingFilter	ringFilter () const
	Returns the line symbol layer's ring filter, which controls which rings are rendered when the line symbol is being used to draw a polygon's rings. More...

void	setMapUnitScale (const QgsMapUnitScale &scale) override

void	setOffset (double offset)
	Sets the line's offset. More...

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

void	setOffsetUnit (QgsUnitTypes::RenderUnit unit)
	Sets the unit for the line's offset. More...

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

void	setRingFilter (QgsLineSymbolLayer::RenderRingFilter filter)
	Sets the line symbol layer's ring filter, which controls which rings are rendered when the line symbol is being used to draw a polygon's rings. More...

virtual void	setWidth (double width)
	Sets the width of the line symbol layer. More...

void	setWidthMapUnitScale (const QgsMapUnitScale &scale)

void	setWidthUnit (QgsUnitTypes::RenderUnit unit)
	Sets the units for the line's width. More...

virtual double	width () const
	Returns the estimated width for the line symbol layer. More...

virtual double	width (const QgsRenderContext &context) const
	Returns the line symbol layer width, in painter units. More...

const QgsMapUnitScale &	widthMapUnitScale () const

QgsUnitTypes::RenderUnit	widthUnit () const
	Returns the units for the line's width. More...

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

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. More...

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

virtual QColor	color () const
	The fill color. More...

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

const QgsPropertyCollection &	dataDefinedProperties () 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...

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

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

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

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

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

virtual QString	ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const

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

QgsPaintEffect *	paintEffect () 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...

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

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

virtual void	setColor (const QColor &color)
	The fill color. 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)
	Sets whether the layer's colors are locked. More...

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

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

virtual void	startRender (QgsSymbolRenderContext &context)=0
	Called before a set of rendering operations commences on the supplied render context. More...

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

virtual void	stopRender (QgsSymbolRenderContext &context)=0
	Called after a set of rendering operations has finished on the supplied render context. More...

virtual QColor	strokeColor () const
	Gets stroke color. More...

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

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

Qgis::SymbolType	type () const

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

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

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

Protected Member Functions
	QgsLineSymbolLayer (bool locked=false)

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

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 QVariantMap &stringMap)
	Restores older data defined properties from string map. More...

Protected Attributes
double	mOffset = 0

QgsMapUnitScale	mOffsetMapUnitScale

QgsUnitTypes::RenderUnit	mOffsetUnit = QgsUnitTypes::RenderMillimeters

RenderRingFilter	mRingFilter = AllRings

double	mWidth = 0

QgsMapUnitScale	mWidthMapUnitScale

QgsUnitTypes::RenderUnit	mWidthUnit = QgsUnitTypes::RenderMillimeters

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< QgsPaintEffect >	mPaintEffect

int	mRenderingPass = 0

Qgis::SymbolType	mType

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

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

Definition at line 941 of file qgssymbollayer.h.

Member Enumeration Documentation

◆ RenderRingFilter

enum QgsLineSymbolLayer::RenderRingFilter

Options for filtering rings when the line symbol layer is being used to render a polygon's rings.

Enumerator
AllRings	Render both exterior and interior rings.
ExteriorRingOnly	Render the exterior ring only.
InteriorRingsOnly	Render the interior rings only.

Definition at line 946 of file qgssymbollayer.h.

Constructor & Destructor Documentation

◆ QgsLineSymbolLayer() [1/2]

QgsLineSymbolLayer::QgsLineSymbolLayer ( const QgsLineSymbolLayer & other )

delete

QgsLineSymbolLayer cannot be copied.

◆ QgsLineSymbolLayer() [2/2]

QgsLineSymbolLayer::QgsLineSymbolLayer ( bool locked = false )

protected

Definition at line 455 of file qgssymbollayer.cpp.

Member Function Documentation

◆ drawPreviewIcon()

void QgsLineSymbolLayer::drawPreviewIcon	(	QgsSymbolRenderContext &	context,
		QSize	size
	)

overridevirtual

Implements QgsSymbolLayer.

Definition at line 689 of file qgssymbollayer.cpp.

◆ dxfWidth()

double QgsLineSymbolLayer::dxfWidth	(	const QgsDxfExport &	e,
		QgsSymbolRenderContext &	context
	)		const

overridevirtual

Gets line width.

Reimplemented from QgsSymbolLayer.

Definition at line 761 of file qgssymbollayer.cpp.

◆ mapUnitScale()

QgsMapUnitScale QgsLineSymbolLayer::mapUnitScale ( ) const

overridevirtual

Reimplemented from QgsSymbolLayer.

Definition at line 683 of file qgssymbollayer.cpp.

◆ offset()

double QgsLineSymbolLayer::offset ( ) const

inline

Returns the line's offset.

Offset units can be retrieved by calling offsetUnit().

See also: setOffset(); offsetUnit(); offsetMapUnitScale()

Definition at line 1029 of file qgssymbollayer.h.

◆ offsetMapUnitScale()

const QgsMapUnitScale& QgsLineSymbolLayer::offsetMapUnitScale ( ) const

inline

Returns the map unit scale for the line's offset.

See also: setOffsetMapUnitScale(); offset(); offsetUnit()

Definition at line 1072 of file qgssymbollayer.h.

◆ offsetUnit()

QgsUnitTypes::RenderUnit QgsLineSymbolLayer::offsetUnit ( ) const

inline

Returns the units for the line's offset.

See also: setOffsetUnit(); offset(); offsetMapUnitScale()

Definition at line 1056 of file qgssymbollayer.h.

◆ operator=()

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

delete

QgsLineSymbolLayer cannot be copied.

◆ outputUnit()

QgsUnitTypes::RenderUnit QgsLineSymbolLayer::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 QgsSymbolLayer.

Definition at line 673 of file qgssymbollayer.cpp.

◆ renderPolygonStroke()

void QgsLineSymbolLayer::renderPolygonStroke	(	const QPolygonF &	points,
		const QVector< QPolygonF > *	rings,
		QgsSymbolRenderContext &	context
	)

virtual

Renders the line symbol layer along the outline of polygon, using the given render context.

The exterior ring of the polygon is specified in points. Optionally, interior rings are set via the rings argument.

See also: renderPolyline()

Reimplemented in QgsSimpleLineSymbolLayer, and QgsTemplatedLineSymbolLayerBase.

Definition at line 708 of file qgssymbollayer.cpp.

◆ renderPolyline()

virtual void QgsLineSymbolLayer::renderPolyline	(	const QPolygonF &	points,
		QgsSymbolRenderContext &	context
	)

pure virtual

Renders the line symbol layer along the line joining points, using the given render context.

See also: renderPolygonStroke()

Implemented in QgsHashedLineSymbolLayer, QgsMarkerLineSymbolLayer, QgsTemplatedLineSymbolLayerBase, QgsSimpleLineSymbolLayer, QgsInterpolatedLineSymbolLayer, and QgsArrowSymbolLayer.

◆ ringFilter()

QgsLineSymbolLayer::RenderRingFilter QgsLineSymbolLayer::ringFilter ( ) const

Returns the line symbol layer's ring filter, which controls which rings are rendered when the line symbol is being used to draw a polygon's rings.

This setting has no effect when the line symbol is not being rendered for a polygon.

See also: setRingFilter()

Since: QGIS 3.6

Definition at line 460 of file qgssymbollayer.cpp.

◆ setMapUnitScale()

void QgsLineSymbolLayer::setMapUnitScale ( const QgsMapUnitScale & scale )

overridevirtual

Reimplemented from QgsSymbolLayer.

Definition at line 678 of file qgssymbollayer.cpp.

◆ setOffset()

void QgsLineSymbolLayer::setOffset ( double offset )

inline

Sets the line's offset.

Offset units are set via setOffsetUnit().

See also: offset(); setOffsetUnit(); setOffsetMapUnitScale()

Definition at line 1040 of file qgssymbollayer.h.

◆ setOffsetMapUnitScale()

void QgsLineSymbolLayer::setOffsetMapUnitScale ( const QgsMapUnitScale & scale )

inline

Sets the map unit scale for the line's offset.

See also: offsetMapUnitScale(); setOffset(); setOffsetUnit()

Definition at line 1064 of file qgssymbollayer.h.

◆ setOffsetUnit()

void QgsLineSymbolLayer::setOffsetUnit ( QgsUnitTypes::RenderUnit unit )

inline

Sets the unit for the line's offset.

See also: offsetUnit(); setOffset(); setOffsetMapUnitScale()

Definition at line 1048 of file qgssymbollayer.h.

◆ setOutputUnit()

void QgsLineSymbolLayer::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

unit	output units

See also: outputUnit()

Reimplemented from QgsSymbolLayer.

Definition at line 668 of file qgssymbollayer.cpp.

◆ setRingFilter()

void QgsLineSymbolLayer::setRingFilter ( QgsLineSymbolLayer::RenderRingFilter filter )

Sets the line symbol layer's ring filter, which controls which rings are rendered when the line symbol is being used to draw a polygon's rings.

This setting has no effect when the line symbol is not being rendered for a polygon.

See also: ringFilter()

Since: QGIS 3.6

Definition at line 465 of file qgssymbollayer.cpp.

◆ setWidth()

virtual void QgsLineSymbolLayer::setWidth ( double width )

inlinevirtual

Sets the width of the line symbol layer.

Calling this method updates the width of the line symbol layer, without changing the existing width units. It has different effects depending on the line symbol layer subclass, e.g. for a simple line layer it changes the stroke width of the line, for a marker line layer it changes the size of the markers used to draw the line.

See also: width()

Warning: Since the width units vary, this method is useful for changing the relative width of a line symbol layer only.

Reimplemented in QgsHashedLineSymbolLayer, and QgsMarkerLineSymbolLayer.

Definition at line 995 of file qgssymbollayer.h.

◆ setWidthMapUnitScale()

void QgsLineSymbolLayer::setWidthMapUnitScale ( const QgsMapUnitScale & scale )

inline

Definition at line 1090 of file qgssymbollayer.h.

◆ setWidthUnit()

void QgsLineSymbolLayer::setWidthUnit ( QgsUnitTypes::RenderUnit unit )

inline

Sets the units for the line's width.

Parameters

unit	width units

See also: widthUnit()

Definition at line 1082 of file qgssymbollayer.h.

◆ width() [1/2]

virtual double QgsLineSymbolLayer::width ( ) const

inlinevirtual

Returns the estimated width for the line symbol layer.

Warning: This returned value is inaccurate if the symbol layer has sub-symbols with different width units. Use the overload accepting a QgsRenderContext argument instead for accurate sizes in this case.

See also: setWidth()

Reimplemented in QgsHashedLineSymbolLayer, and QgsMarkerLineSymbolLayer.

Definition at line 1006 of file qgssymbollayer.h.

◆ width() [2/2]

double QgsLineSymbolLayer::width ( const QgsRenderContext & context ) const

virtual

Returns the line symbol layer width, in painter units.

This method returns an accurate width by calculating the actual rendered width of the symbol layer using the provided render context.

See also: setWidth()

Since: QGIS 3.4.5

Reimplemented in QgsHashedLineSymbolLayer, and QgsMarkerLineSymbolLayer.

Definition at line 756 of file qgssymbollayer.cpp.

◆ widthMapUnitScale()

const QgsMapUnitScale& QgsLineSymbolLayer::widthMapUnitScale ( ) const

inline

Definition at line 1091 of file qgssymbollayer.h.

◆ widthUnit()

QgsUnitTypes::RenderUnit QgsLineSymbolLayer::widthUnit ( ) const

inline

Returns the units for the line's width.

See also: setWidthUnit()

Definition at line 1088 of file qgssymbollayer.h.

Member Data Documentation

◆ mOffset

double QgsLineSymbolLayer::mOffset = 0

protected

Definition at line 1123 of file qgssymbollayer.h.

◆ mOffsetMapUnitScale

QgsMapUnitScale QgsLineSymbolLayer::mOffsetMapUnitScale

protected

Definition at line 1125 of file qgssymbollayer.h.

◆ mOffsetUnit

QgsUnitTypes::RenderUnit QgsLineSymbolLayer::mOffsetUnit = QgsUnitTypes::RenderMillimeters

protected

Definition at line 1124 of file qgssymbollayer.h.

◆ mRingFilter

RenderRingFilter QgsLineSymbolLayer::mRingFilter = AllRings

protected

Definition at line 1127 of file qgssymbollayer.h.

◆ mWidth

double QgsLineSymbolLayer::mWidth = 0

protected

Definition at line 1120 of file qgssymbollayer.h.

◆ mWidthMapUnitScale

QgsMapUnitScale QgsLineSymbolLayer::mWidthMapUnitScale

protected

Definition at line 1122 of file qgssymbollayer.h.

◆ mWidthUnit

QgsUnitTypes::RenderUnit QgsLineSymbolLayer::mWidthUnit = QgsUnitTypes::RenderMillimeters

protected

Definition at line 1121 of file qgssymbollayer.h.

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

/build/qgis-3.20.0+99unstable/src/core/symbology/qgssymbollayer.h
/build/qgis-3.20.0+99unstable/src/core/symbology/qgssymbollayer.cpp

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ RenderRingFilter

Constructor & Destructor Documentation

◆ QgsLineSymbolLayer() [1/2]

◆ QgsLineSymbolLayer() [2/2]

Member Function Documentation

◆ drawPreviewIcon()

◆ dxfWidth()

◆ mapUnitScale()

◆ offset()

◆ offsetMapUnitScale()

◆ offsetUnit()

◆ operator=()

◆ outputUnit()

◆ renderPolygonStroke()

◆ renderPolyline()

◆ ringFilter()

◆ setMapUnitScale()

◆ setOffset()

◆ setOffsetMapUnitScale()

◆ setOffsetUnit()

◆ setOutputUnit()

◆ setRingFilter()

◆ setWidth()

◆ setWidthMapUnitScale()

◆ setWidthUnit()

◆ width() [1/2]

◆ width() [2/2]

◆ widthMapUnitScale()

◆ widthUnit()

Member Data Documentation

◆ mOffset

◆ mOffsetMapUnitScale

◆ mOffsetUnit

◆ mRingFilter

◆ mWidth

◆ mWidthMapUnitScale

◆ mWidthUnit