Line symbol layer type which draws repeating marker symbols along a line feature. More...

#include <qgslinesymbollayer.h>

Inheritance diagram for QgsMarkerLineSymbolLayer:

[legend]

Public Member Functions
	QgsMarkerLineSymbolLayer (bool rotateMarker=DEFAULT_MARKERLINE_ROTATE, double interval=DEFAULT_MARKERLINE_INTERVAL)
	Constructor for QgsMarkerLineSymbolLayer.

	~QgsMarkerLineSymbolLayer () override

QgsMarkerLineSymbolLayer *	clone () const override
	Shall be reimplemented by subclasses to create a deep copy of the instance.

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

double	estimateMaxBleed (const QgsRenderContext &context) const override
	Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context.

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

QString	layerType () const override
	Returns a string that represents this layer type.

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

Q_DECL_DEPRECATED bool	rotateMarker () const
	Shall the marker be rotated.

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

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

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

Q_DECL_DEPRECATED void	setRotateMarker (bool rotate)
	Shall the marker be rotated.

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

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

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.

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

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

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

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

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

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

Public Member Functions inherited from QgsTemplatedLineSymbolLayerBase
	QgsTemplatedLineSymbolLayerBase (bool rotateSymbol=true, double interval=3)
	Constructor for QgsTemplatedLineSymbolLayerBase.

	~QgsTemplatedLineSymbolLayerBase () override

double	averageAngleLength () const
	Returns the length of line over which the line's direction is averaged when calculating individual symbol angles.

const QgsMapUnitScale &	averageAngleMapUnitScale () const
	Returns the map unit scale for the length over which the line's direction is averaged when calculating individual symbol angles.

Qgis::RenderUnit	averageAngleUnit () const
	Returns the unit for the length over which the line's direction is averaged when calculating individual symbol angles.

bool	canCauseArtifactsBetweenAdjacentTiles () const override
	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.

double	interval () const
	Returns the interval between individual symbols.

const QgsMapUnitScale &	intervalMapUnitScale () const
	Returns the map unit scale for the interval between symbols.

Qgis::RenderUnit	intervalUnit () const
	Returns the units for the interval between symbols.

QgsMapUnitScale	mapUnitScale () const FINAL

double	offsetAlongLine () const
	Returns the offset along the line for the symbol placement.

const QgsMapUnitScale &	offsetAlongLineMapUnitScale () const
	Returns the map unit scale used for calculating the offset in map units along line for symbols.

Qgis::RenderUnit	offsetAlongLineUnit () const
	Returns the unit used for calculating the offset along line for symbols.

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

Q_DECL_DEPRECATED Qgis::MarkerLinePlacement	placement () const
	Returns the placement of the symbols.

Qgis::MarkerLinePlacements	placements () const
	Returns the placement of the symbols.

bool	placeOnEveryPart () const
	Returns `true` if the placement applies for every part of multi-part feature geometries.

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

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

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

bool	rotateSymbols () const
	Returns `true` if the repeating symbols be rotated to match their line segment orientation.

void	setAverageAngleLength (double length)
	Sets the length of line over which the line's direction is averaged when calculating individual symbol angles.

void	setAverageAngleMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale for the length over which the line's direction is averaged when calculating individual symbol angles.

void	setAverageAngleUnit (Qgis::RenderUnit unit)
	Sets the unit for the length over which the line's direction is averaged when calculating individual symbol angles.

void	setInterval (double interval)
	Sets the interval between individual symbols.

void	setIntervalMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale for the interval between symbols.

void	setIntervalUnit (Qgis::RenderUnit unit)
	Sets the units for the interval between symbols.

void	setMapUnitScale (const QgsMapUnitScale &scale) FINAL

void	setOffsetAlongLine (double offsetAlongLine)
	Sets the the offset along the line for the symbol placement.

void	setOffsetAlongLineMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale used for calculating the offset in map units along line for symbols.

void	setOffsetAlongLineUnit (Qgis::RenderUnit unit)
	Sets the unit used for calculating the offset along line for symbols.

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

Q_DECL_DEPRECATED void	setPlacement (Qgis::MarkerLinePlacement placement)
	Sets the placement of the symbols.

void	setPlacements (Qgis::MarkerLinePlacements placements)
	Sets the placement of the symbols.

void	setPlaceOnEveryPart (bool respect)
	Sets whether the placement applies for every part of multi-part feature geometries.

void	setRotateSymbols (bool rotate)
	Sets whether the repeating symbols should be rotated to match their line segment orientation.

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

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

Public Member Functions inherited from QgsLineSymbolLayer
	QgsLineSymbolLayer (const QgsLineSymbolLayer &other)=delete

void	drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override

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

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

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

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

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

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.

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

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

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

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.

void	setWidthMapUnitScale (const QgsMapUnitScale &scale)

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

const QgsMapUnitScale &	widthMapUnitScale () const

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

Public Member Functions inherited from QgsSymbolLayer
	QgsSymbolLayer (const QgsSymbolLayer &other)=delete

virtual	~QgsSymbolLayer ()

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 double	dxfAngle (QgsSymbolRenderContext &context) const
	Gets angle.

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

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

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.

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

bool	installMasks (QgsRenderContext &context, bool recursive, const QRectF &rect=QRectF())
	When rendering, install masks on context painter.

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 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

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.

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

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

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.

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

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

Qgis::SymbolType	type () const

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

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 QgsSymbolLayer *	create (const QVariantMap &properties=QVariantMap())
	Creates a new QgsMarkerLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsMarkerLineSymbolLayer::properties() ).

static QgsSymbolLayer *	createFromSld (QDomElement &element)
	Creates a new QgsMarkerLineSymbolLayer from an SLD XML DOM element.

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

Protected Member Functions
void	renderSymbol (const QPointF &point, const QgsFeature *feature, QgsRenderContext &context, int layer=-1, bool selected=false) override
	Renders the templated symbol at the specified point, using the given render context.

void	setSymbolAngle (double angle) override
	Sets the symbol's angle, in degrees clockwise.

void	setSymbolLineAngle (double angle) override
	Sets the line angle modification for the symbol's angle.

double	symbolAngle () const override
	Returns the symbol's current angle, in degrees clockwise.

Protected Member Functions inherited from QgsTemplatedLineSymbolLayerBase
void	copyTemplateSymbolProperties (QgsTemplatedLineSymbolLayerBase *destLayer) const
	Copies all common properties of this layer to another templated symbol layer.

Protected Member Functions inherited from QgsLineSymbolLayer
	QgsLineSymbolLayer (bool locked=false)

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	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
std::unique_ptr< QgsMarkerSymbol >	mMarker

Protected Attributes inherited from QgsLineSymbolLayer
double	mOffset = 0

QgsMapUnitScale	mOffsetMapUnitScale

Qgis::RenderUnit	mOffsetUnit = Qgis::RenderUnit::Millimeters

RenderRingFilter	mRingFilter = AllRings

double	mWidth = 0

QgsMapUnitScale	mWidthMapUnitScale

Qgis::RenderUnit	mWidthUnit = Qgis::RenderUnit::Millimeters

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 QgsLineSymbolLayer
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 class	Property : int { Size = 0 , Angle , Name , FillColor , StrokeColor , StrokeWidth , StrokeStyle , Offset , Character , Width , Height , PreserveAspectRatio , FillStyle , JoinStyle , SecondaryColor , LineAngle , LineDistance , GradientType , CoordinateMode , GradientSpread , GradientReference1X , GradientReference1Y , GradientReference2X , GradientReference2Y , GradientReference1IsCentroid , GradientReference2IsCentroid , BlurRadius , ShapeburstUseWholeShape , ShapeburstMaxDistance , ShapeburstIgnoreRings , File , DistanceX , DistanceY , DisplacementX , DisplacementY , Opacity , CustomDash , CapStyle , Placement , Interval , OffsetAlongLine , AverageAngleLength , HorizontalAnchor , VerticalAnchor , LayerEnabled , ArrowWidth , ArrowStartWidth , ArrowHeadLength , ArrowHeadThickness , ArrowHeadType , ArrowType , OffsetX , OffsetY , PointCount , RandomSeed , ClipPoints , DensityArea , FontFamily , FontStyle , DashPatternOffset , TrimStart , TrimEnd , LineStartWidthValue , LineEndWidthValue , LineStartColorValue , LineEndColorValue , MarkerClipping , RandomOffsetX , RandomOffsetY , LineClipping , SkipMultiples , ShowMarker }
	Data definable properties. More...

Static Protected Member Functions inherited from QgsTemplatedLineSymbolLayerBase
static void	setCommonProperties (QgsTemplatedLineSymbolLayerBase *destLayer, const QVariantMap &properties)
	Sets all common symbol properties in the destLayer, using the settings serialized in the properties map.

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

Line symbol layer type which draws repeating marker symbols along a line feature.

Definition at line 917 of file qgslinesymbollayer.h.

Constructor & Destructor Documentation

◆ QgsMarkerLineSymbolLayer()

QgsMarkerLineSymbolLayer::QgsMarkerLineSymbolLayer	(	bool	rotateMarker = `DEFAULT_MARKERLINE_ROTATE`,
		double	interval = `DEFAULT_MARKERLINE_INTERVAL`
	)

Constructor for QgsMarkerLineSymbolLayer.

Creates a marker line with a default marker symbol, placed at the specified interval (in millimeters).

The rotateMarker argument specifies whether individual marker symbols should be rotated to match the line segment alignment.

Definition at line 2436 of file qgslinesymbollayer.cpp.

◆ ~QgsMarkerLineSymbolLayer()

QgsMarkerLineSymbolLayer::~QgsMarkerLineSymbolLayer ( )

overridedefault

Member Function Documentation

◆ clone()

QgsMarkerLineSymbolLayer * QgsMarkerLineSymbolLayer::clone ( ) const

overridevirtual

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

Implements QgsSymbolLayer.

Definition at line 2492 of file qgslinesymbollayer.cpp.

◆ color()

QColor QgsMarkerLineSymbolLayer::color ( ) const

overridevirtual

Returns the "representative" color of the symbol layer.

Depending on the symbol layer type, this will have different meaning. For instance, a line symbol layer will generally return the stroke color of the layer, while a fill symbol layer will return the "fill" color instead of stroke.

Some symbol layer types will return an invalid QColor if they have no representative color associated (e.g. raster image based symbol layers).

See also: setColor(); strokeColor(); fillColor()

Reimplemented from QgsSymbolLayer.

Definition at line 2470 of file qgslinesymbollayer.cpp.

◆ create()

QgsSymbolLayer * QgsMarkerLineSymbolLayer::create ( const QVariantMap & properties = QVariantMap() )

static

Creates a new QgsMarkerLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsMarkerLineSymbolLayer::properties() ).

Definition at line 2444 of file qgslinesymbollayer.cpp.

◆ createFromSld()

QgsSymbolLayer * QgsMarkerLineSymbolLayer::createFromSld ( QDomElement & element )

static

Creates a new QgsMarkerLineSymbolLayer from an SLD XML DOM element.

Definition at line 2574 of file qgslinesymbollayer.cpp.

◆ estimateMaxBleed()

double QgsMarkerLineSymbolLayer::estimateMaxBleed ( const QgsRenderContext & context ) const

overridevirtual

Returns the estimated maximum distance which the layer style will bleed outside the drawn shape when drawn in the specified /a context.

For example, polygons drawn with an stroke will draw half the width of the stroke outside of the polygon. This amount is estimated, since it may be affected by data defined symbology rules.

Reimplemented from QgsSymbolLayer.

Definition at line 2748 of file qgslinesymbollayer.cpp.

◆ hasDataDefinedProperties()

bool QgsMarkerLineSymbolLayer::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 2739 of file qgslinesymbollayer.cpp.

◆ layerType()

QString QgsMarkerLineSymbolLayer::layerType ( ) const

overridevirtual

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 2459 of file qgslinesymbollayer.cpp.

◆ renderPolyline()

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

overridevirtual

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

See also: renderPolygonStroke()

Implements QgsLineSymbolLayer.

Definition at line 2672 of file qgslinesymbollayer.cpp.

◆ renderSymbol()

void QgsMarkerLineSymbolLayer::renderSymbol	(	const QPointF &	point,
		const QgsFeature *	feature,
		QgsRenderContext &	context,
		int	layer = `-1`,
		bool	selected = `false`
	)

overrideprotectedvirtual

Renders the templated symbol at the specified point, using the given render context.

The feature argument is used to pass the feature currently being rendered (when available).

If only a single symbol layer from the symbol should be rendered, it should be specified in the layer argument. A layer of -1 indicates that all symbol layers should be rendered.

If selected is true then the symbol will be drawn using the "selected feature" style and colors instead of the symbol's normal style.

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2695 of file qgslinesymbollayer.cpp.

◆ rotateMarker()

Q_DECL_DEPRECATED bool QgsMarkerLineSymbolLayer::rotateMarker ( ) const

inline

Shall the marker be rotated.

Returns: true if the marker should be rotated.

Deprecated:: QGIS 3.40. Use rotateSymbols() instead.

Definition at line 974 of file qgslinesymbollayer.h.

◆ setColor()

void QgsMarkerLineSymbolLayer::setColor ( const QColor & color )

overridevirtual

Sets the "representative" color for the symbol layer.

Depending on the symbol layer type, this will have different meaning. For instance, a line symbol layer will generally set the stroke color of the layer, while a fill symbol layer will set the "fill" color instead of stroke.

See also: color(); setStrokeColor(); setFillColor()

Reimplemented from QgsSymbolLayer.

Definition at line 2464 of file qgslinesymbollayer.cpp.

◆ setDataDefinedProperty()

void QgsMarkerLineSymbolLayer::setDataDefinedProperty	(	QgsSymbolLayer::Property	key,
		const QgsProperty &	property
	)

overridevirtual

Sets a data defined property for the layer.

Any existing property with the same key will be overwritten.

See also: dataDefinedProperties(); Property

Reimplemented from QgsSymbolLayer.

Definition at line 2663 of file qgslinesymbollayer.cpp.

◆ setOutputUnit()

void QgsMarkerLineSymbolLayer::setOutputUnit ( Qgis::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 QgsLineSymbolLayer.

Definition at line 2715 of file qgslinesymbollayer.cpp.

◆ setRotateMarker()

Q_DECL_DEPRECATED void QgsMarkerLineSymbolLayer::setRotateMarker ( bool rotate )

inline

Shall the marker be rotated.

Deprecated:: QGIS 3.40. Use setRotateSymbols() instead.

Definition at line 980 of file qgslinesymbollayer.h.

◆ setSubSymbol()

bool QgsMarkerLineSymbolLayer::setSubSymbol ( QgsSymbol * symbol )

overridevirtual

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

Reimplemented from QgsSymbolLayer.

Definition at line 2417 of file qgslinesymbollayer.cpp.

◆ setSymbolAngle()

void QgsMarkerLineSymbolLayer::setSymbolAngle ( double angle )

overrideprotectedvirtual

Sets the symbol's angle, in degrees clockwise.

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2690 of file qgslinesymbollayer.cpp.

◆ setSymbolLineAngle()

void QgsMarkerLineSymbolLayer::setSymbolLineAngle ( double angle )

overrideprotectedvirtual

Sets the line angle modification for the symbol's angle.

This angle is added to the symbol's rotation and data defined rotation before rendering the symbol, and is used for orienting symbols to match the line's angle.

Parameters

angle Angle in degrees, valid values are between 0 and 360

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2680 of file qgslinesymbollayer.cpp.

◆ setWidth()

void QgsMarkerLineSymbolLayer::setWidth ( double width )

overridevirtual

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 from QgsLineSymbolLayer.

Definition at line 2658 of file qgslinesymbollayer.cpp.

◆ startRender()

void QgsMarkerLineSymbolLayer::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()

Implements QgsSymbolLayer.

Definition at line 2475 of file qgslinesymbollayer.cpp.

◆ stopRender()

void QgsMarkerLineSymbolLayer::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()

Implements QgsSymbolLayer.

Definition at line 2486 of file qgslinesymbollayer.cpp.

◆ subSymbol()

QgsSymbol * QgsMarkerLineSymbolLayer::subSymbol ( )

overridevirtual

Returns the symbol's sub symbol, if present.

Reimplemented from QgsSymbolLayer.

Definition at line 2412 of file qgslinesymbollayer.cpp.

◆ symbolAngle()

double QgsMarkerLineSymbolLayer::symbolAngle ( ) const

overrideprotectedvirtual

Returns the symbol's current angle, in degrees clockwise.

Implements QgsTemplatedLineSymbolLayerBase.

Definition at line 2685 of file qgslinesymbollayer.cpp.

◆ toSld()

void QgsMarkerLineSymbolLayer::toSld	(	QDomDocument &	doc,
		QDomElement &	element,
		const QVariantMap &	props
	)		const

overridevirtual

Saves the symbol layer as SLD.

Reimplemented from QgsSymbolLayer.

Definition at line 2499 of file qgslinesymbollayer.cpp.

◆ usedAttributes()

QSet< QString > QgsMarkerLineSymbolLayer::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 2731 of file qgslinesymbollayer.cpp.

◆ usesMapUnits()

bool QgsMarkerLineSymbolLayer::usesMapUnits ( ) const

overridevirtual

Returns true if the symbol layer has any components which use map unit based sizes.

Since: QGIS 3.18

Reimplemented from QgsSymbolLayer.

Definition at line 2721 of file qgslinesymbollayer.cpp.

◆ width() [1/2]

double QgsMarkerLineSymbolLayer::width ( ) const

overridevirtual

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 from QgsLineSymbolLayer.

Definition at line 2705 of file qgslinesymbollayer.cpp.

◆ width() [2/2]

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

overridevirtual

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 from QgsLineSymbolLayer.

Definition at line 2710 of file qgslinesymbollayer.cpp.

Member Data Documentation

◆ mMarker

std::unique_ptr< QgsMarkerSymbol > QgsMarkerLineSymbolLayer::mMarker

protected

Definition at line 986 of file qgslinesymbollayer.h.

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

/build/qgis-3.40.0+99sid/src/core/symbology/qgslinesymbollayer.h
/build/qgis-3.40.0+99sid/src/core/symbology/qgslinesymbollayer.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsMarkerLineSymbolLayer()

◆ ~QgsMarkerLineSymbolLayer()

Member Function Documentation

◆ clone()

◆ color()

◆ create()

◆ createFromSld()

◆ estimateMaxBleed()

◆ hasDataDefinedProperties()

◆ layerType()

◆ renderPolyline()

◆ renderSymbol()

◆ rotateMarker()

◆ setColor()

◆ setDataDefinedProperty()

◆ setOutputUnit()

◆ setRotateMarker()

◆ setSubSymbol()

◆ setSymbolAngle()

◆ setSymbolLineAngle()

◆ setWidth()

◆ startRender()

◆ stopRender()

◆ subSymbol()

◆ symbolAngle()

◆ toSld()

◆ usedAttributes()

◆ usesMapUnits()

◆ width() [1/2]

◆ width() [2/2]

Member Data Documentation

◆ mMarker