Base class for templated line symbols, e.g. More...

#include <qgslinesymbollayer.h>

Inheritance diagram for QgsTemplatedLineSymbolLayerBase:

[legend]

Public Member Functions
	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.

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

void	setWidthMapUnitScale (const QgsMapUnitScale &scale)

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

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

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

const QgsMapUnitScale &	widthMapUnitScale () const

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

Public Member Functions inherited from QgsSymbolLayer
virtual	~QgsSymbolLayer ()

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 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 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.

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 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

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.

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

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

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

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

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

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

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

virtual void	renderSymbol (const QPointF &point, const QgsFeature *feature, QgsRenderContext &context, int layer=-1, bool selected=false)=0
	Renders the templated symbol at the specified point, using the given render context.

virtual void	setSymbolAngle (double angle)=0
	Sets the symbol's angle, in degrees clockwise.

virtual void	setSymbolLineAngle (double angle)=0
	Sets the line angle modification for the symbol's angle.

virtual double	symbolAngle () const =0
	Returns the symbol's current angle, in degrees clockwise.

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

Protected Member Functions inherited from QgsSymbolLayer
	QgsSymbolLayer (const QgsSymbolLayer &other)

	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.

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

Friends
class	TestQgsMarkerLineSymbol

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

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.

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

Base class for templated line symbols, e.g.

line symbols which draw markers or hash lines at intervals along the line feature.

Since: QGIS 3.8

Definition at line 554 of file qgslinesymbollayer.h.

Constructor & Destructor Documentation

◆ QgsTemplatedLineSymbolLayerBase()

QgsTemplatedLineSymbolLayerBase::QgsTemplatedLineSymbolLayerBase	(	bool	rotateSymbol = `true`,
		double	interval = `3`
	)

Constructor for QgsTemplatedLineSymbolLayerBase.

Creates a template line placed at the specified interval (in millimeters).

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

Definition at line 1244 of file qgslinesymbollayer.cpp.

◆ ~QgsTemplatedLineSymbolLayerBase()

QgsTemplatedLineSymbolLayerBase::~QgsTemplatedLineSymbolLayerBase ( )

overridedefault

Member Function Documentation

◆ averageAngleLength()

double QgsTemplatedLineSymbolLayerBase::averageAngleLength ( ) const

inline

Returns the length of line over which the line's direction is averaged when calculating individual symbol angles.

Longer lengths smooth out angles from jagged lines to a greater extent.

Units are retrieved through averageAngleUnit()

See also: setAverageAngleLength(); averageAngleUnit(); averageAngleMapUnitScale()

Definition at line 751 of file qgslinesymbollayer.h.

◆ averageAngleMapUnitScale()

const QgsMapUnitScale & QgsTemplatedLineSymbolLayerBase::averageAngleMapUnitScale ( ) const

inline

Returns the map unit scale for the length over which the line's direction is averaged when calculating individual symbol angles.

See also: setAverageAngleMapUnitScale(); averageAngleLength(); averageAngleUnit()

Definition at line 803 of file qgslinesymbollayer.h.

◆ averageAngleUnit()

Qgis::RenderUnit QgsTemplatedLineSymbolLayerBase::averageAngleUnit ( ) const

inline

Returns the unit for the length over which the line's direction is averaged when calculating individual symbol angles.

See also: setAverageAngleUnit(); averageAngleLength(); averageAngleMapUnitScale()

Definition at line 783 of file qgslinesymbollayer.h.

◆ canCauseArtifactsBetweenAdjacentTiles()

bool QgsTemplatedLineSymbolLayerBase::canCauseArtifactsBetweenAdjacentTiles ( ) const

overridevirtual

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.

The default implementation returns false.

Since: QGIS 3.18

Reimplemented from QgsSymbolLayer.

Definition at line 1535 of file qgslinesymbollayer.cpp.

◆ copyTemplateSymbolProperties()

void QgsTemplatedLineSymbolLayerBase::copyTemplateSymbolProperties ( QgsTemplatedLineSymbolLayerBase * destLayer ) const

protected

Copies all common properties of this layer to another templated symbol layer.

Definition at line 1571 of file qgslinesymbollayer.cpp.

◆ interval()

double QgsTemplatedLineSymbolLayerBase::interval ( ) const

inline

Returns the interval between individual symbols.

Units are specified through intervalUnits().

See also: setInterval(); intervalUnit()

Definition at line 587 of file qgslinesymbollayer.h.

◆ intervalMapUnitScale()

const QgsMapUnitScale & QgsTemplatedLineSymbolLayerBase::intervalMapUnitScale ( ) const

inline

Returns the map unit scale for the interval between symbols.

See also: setIntervalMapUnitScale(); intervalUnit(); interval()

Definition at line 626 of file qgslinesymbollayer.h.

◆ intervalUnit()

Qgis::RenderUnit QgsTemplatedLineSymbolLayerBase::intervalUnit ( ) const

inline

Returns the units for the interval between symbols.

See also: setIntervalUnit(); interval()

Definition at line 610 of file qgslinesymbollayer.h.

◆ mapUnitScale()

QgsMapUnitScale QgsTemplatedLineSymbolLayerBase::mapUnitScale ( ) const

virtual

Reimplemented from QgsLineSymbolLayer.

Definition at line 1500 of file qgslinesymbollayer.cpp.

◆ offsetAlongLine()

double QgsTemplatedLineSymbolLayerBase::offsetAlongLine ( ) const

inline

Returns the offset along the line for the symbol placement.

For Interval placements, this is the distance between the start of the line and the first symbol. For FirstVertex and LastVertex placements, this is the distance between the symbol and the start of the line or the end of the line respectively. This setting has no effect for Vertex or CentralPoint placements.

Returns: The offset along the line. The unit for the offset is retrievable via offsetAlongLineUnit.

See also: setOffsetAlongLine(); offsetAlongLineUnit(); placement()

Definition at line 698 of file qgslinesymbollayer.h.

◆ offsetAlongLineMapUnitScale()

const QgsMapUnitScale & QgsTemplatedLineSymbolLayerBase::offsetAlongLineMapUnitScale ( ) const

inline

Returns the map unit scale used for calculating the offset in map units along line for symbols.

See also: setOffsetAlongLineMapUnitScale()

Definition at line 733 of file qgslinesymbollayer.h.

◆ offsetAlongLineUnit()

Qgis::RenderUnit QgsTemplatedLineSymbolLayerBase::offsetAlongLineUnit ( ) const

inline

Returns the unit used for calculating the offset along line for symbols.

Returns: Offset along line unit type.

See also: setOffsetAlongLineUnit(); offsetAlongLine()

Definition at line 719 of file qgslinesymbollayer.h.

◆ outputUnit()

Qgis::RenderUnit QgsTemplatedLineSymbolLayerBase::outputUnit ( ) const

virtual

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 QgsLineSymbolLayer.

Definition at line 1474 of file qgslinesymbollayer.cpp.

◆ placement()

Qgis::MarkerLinePlacement QgsTemplatedLineSymbolLayerBase::placement ( ) const

Returns the placement of the symbols.

See also: setPlacement()

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

Definition at line 1251 of file qgslinesymbollayer.cpp.

◆ placements()

Qgis::MarkerLinePlacements QgsTemplatedLineSymbolLayerBase::placements ( ) const

inline

Returns the placement of the symbols.

See also: setPlacements()

Since: QGIS 3.24

Definition at line 647 of file qgslinesymbollayer.h.

◆ placeOnEveryPart()

bool QgsTemplatedLineSymbolLayerBase::placeOnEveryPart ( ) const

inline

Returns true if the placement applies for every part of multi-part feature geometries.

The default is true, which means that Qgis::MarkerLinePlacement::FirstVertex or Qgis::MarkerLinePlacement::LastVertex placements will result in a symbol on the first/last vertex of EVERY part of a multipart feature.

If false, then Qgis::MarkerLinePlacement::FirstVertex or Qgis::MarkerLinePlacement::LastVertex placements will result in a symbol on the first/last vertex of the overall multipart geometry only.

See also: setPlaceOnEveryPart()

Since: QGIS 3.24

Definition at line 670 of file qgslinesymbollayer.h.

◆ properties()

QVariantMap QgsTemplatedLineSymbolLayerBase::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 1511 of file qgslinesymbollayer.cpp.

◆ renderPolygonStroke()

void QgsTemplatedLineSymbolLayerBase::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 from QgsLineSymbolLayer.

Definition at line 1414 of file qgslinesymbollayer.cpp.

◆ renderPolyline()

void QgsTemplatedLineSymbolLayerBase::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 1282 of file qgslinesymbollayer.cpp.

◆ renderSymbol()

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

protectedpure virtual

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.

Implemented in QgsMarkerLineSymbolLayer, and QgsHashedLineSymbolLayer.

◆ rotateSymbols()

bool QgsTemplatedLineSymbolLayerBase::rotateSymbols ( ) const

inline

Returns true if the repeating symbols be rotated to match their line segment orientation.

See also: setRotateSymbols()

Definition at line 574 of file qgslinesymbollayer.h.

◆ setAverageAngleLength()

void QgsTemplatedLineSymbolLayerBase::setAverageAngleLength ( double length )

inline

Sets the length of line over which the line's direction is averaged when calculating individual symbol angles.

Longer lengths smooth out angles from jagged lines to a greater extent.

Units are set through setAverageAngleUnit()

See also: averageAngleLength(); setAverageAngleUnit(); setAverageAngleMapUnitScale()

Definition at line 763 of file qgslinesymbollayer.h.

◆ setAverageAngleMapUnitScale()

void QgsTemplatedLineSymbolLayerBase::setAverageAngleMapUnitScale ( const QgsMapUnitScale & scale )

inline

Sets the map unit scale for the length over which the line's direction is averaged when calculating individual symbol angles.

See also: averageAngleMapUnitScale(); setAverageAngleLength(); setAverageAngleUnit()

Definition at line 793 of file qgslinesymbollayer.h.

◆ setAverageAngleUnit()

void QgsTemplatedLineSymbolLayerBase::setAverageAngleUnit ( Qgis::RenderUnit unit )

inline

Sets the unit for the length over which the line's direction is averaged when calculating individual symbol angles.

See also: averageAngleUnit(); setAverageAngleLength(); setAverageAngleMapUnitScale()

Definition at line 773 of file qgslinesymbollayer.h.

◆ setCommonProperties()

void QgsTemplatedLineSymbolLayerBase::setCommonProperties	(	QgsTemplatedLineSymbolLayerBase *	destLayer,
		const QVariantMap &	properties
	)

staticprotected

Sets all common symbol properties in the destLayer, using the settings serialized in the properties map.

Definition at line 1592 of file qgslinesymbollayer.cpp.

◆ setInterval()

void QgsTemplatedLineSymbolLayerBase::setInterval ( double interval )

inline

Sets the interval between individual symbols.

Parameters

interval interval size. Units are specified through setIntervalUnit()

See also: interval(); setIntervalUnit()

Definition at line 595 of file qgslinesymbollayer.h.

◆ setIntervalMapUnitScale()

void QgsTemplatedLineSymbolLayerBase::setIntervalMapUnitScale ( const QgsMapUnitScale & scale )

inline

Sets the map unit scale for the interval between symbols.

See also: intervalMapUnitScale(); setIntervalUnit(); setInterval()

Definition at line 618 of file qgslinesymbollayer.h.

◆ setIntervalUnit()

void QgsTemplatedLineSymbolLayerBase::setIntervalUnit ( Qgis::RenderUnit unit )

inline

Sets the units for the interval between symbols.

Parameters

unit	interval units

See also: intervalUnit(); setInterval()

Definition at line 603 of file qgslinesymbollayer.h.

◆ setMapUnitScale()

void QgsTemplatedLineSymbolLayerBase::setMapUnitScale ( const QgsMapUnitScale & scale )

virtual

Reimplemented from QgsLineSymbolLayer.

Definition at line 1492 of file qgslinesymbollayer.cpp.

◆ setOffsetAlongLine()

void QgsTemplatedLineSymbolLayerBase::setOffsetAlongLine ( double offsetAlongLine )

inline

Sets the the offset along the line for the symbol placement.

For Interval placements, this is the distance between the start of the line and the first symbol. For FirstVertex and LastVertex placements, this is the distance between the symbol and the start of the line or the end of the line respectively. This setting has no effect for Vertex or CentralPoint placements.

Parameters

offsetAlongLine Distance to offset markers along the line. The offset unit is set via setOffsetAlongLineUnit.

See also: offsetAlongLine(); setOffsetAlongLineUnit(); setPlacement()

Definition at line 711 of file qgslinesymbollayer.h.

◆ setOffsetAlongLineMapUnitScale()

void QgsTemplatedLineSymbolLayerBase::setOffsetAlongLineMapUnitScale ( const QgsMapUnitScale & scale )

inline

Sets the map unit scale used for calculating the offset in map units along line for symbols.

See also: offsetAlongLineMapUnitScale()

Definition at line 739 of file qgslinesymbollayer.h.

◆ setOffsetAlongLineUnit()

void QgsTemplatedLineSymbolLayerBase::setOffsetAlongLineUnit ( Qgis::RenderUnit unit )

inline

Sets the unit used for calculating the offset along line for symbols.

Parameters

unit	Offset along line unit type.

See also: offsetAlongLineUnit(); setOffsetAlongLine()

Definition at line 727 of file qgslinesymbollayer.h.

◆ setOutputUnit()

void QgsTemplatedLineSymbolLayerBase::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 1484 of file qgslinesymbollayer.cpp.

◆ setPlacement()

void QgsTemplatedLineSymbolLayerBase::setPlacement ( Qgis::MarkerLinePlacement placement )

Sets the placement of the symbols.

See also: placement()

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

Definition at line 1275 of file qgslinesymbollayer.cpp.

◆ setPlacements()

void QgsTemplatedLineSymbolLayerBase::setPlacements ( Qgis::MarkerLinePlacements placements )

inline

Sets the placement of the symbols.

See also: placements()

Since: QGIS 3.24

Definition at line 654 of file qgslinesymbollayer.h.

◆ setPlaceOnEveryPart()

void QgsTemplatedLineSymbolLayerBase::setPlaceOnEveryPart ( bool respect )

inline

Sets whether the placement applies for every part of multi-part feature geometries.

The default is true, which means that Qgis::MarkerLinePlacement::FirstVertex or Qgis::MarkerLinePlacement::LastVertex placements will result in a symbol on the first/last vertex of EVERY part of a multipart feature.

If false, then Qgis::MarkerLinePlacement::FirstVertex or Qgis::MarkerLinePlacement::LastVertex placements will result in a symbol on the first/last vertex of the overall multipart geometry only.

See also: placeOnEveryPart()

Since: QGIS 3.24

Definition at line 686 of file qgslinesymbollayer.h.

◆ setRotateSymbols()

void QgsTemplatedLineSymbolLayerBase::setRotateSymbols ( bool rotate )

inline

Sets whether the repeating symbols should be rotated to match their line segment orientation.

See also: rotateSymbols()

Definition at line 580 of file qgslinesymbollayer.h.

◆ setSymbolAngle()

virtual void QgsTemplatedLineSymbolLayerBase::setSymbolAngle ( double angle )

protectedpure virtual

Sets the symbol's angle, in degrees clockwise.

Implemented in QgsMarkerLineSymbolLayer, and QgsHashedLineSymbolLayer.

◆ setSymbolLineAngle()

virtual void QgsTemplatedLineSymbolLayerBase::setSymbolLineAngle ( double angle )

protectedpure virtual

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

Implemented in QgsMarkerLineSymbolLayer, and QgsHashedLineSymbolLayer.

◆ startFeatureRender()

void QgsTemplatedLineSymbolLayerBase::startFeatureRender	(	const QgsFeature &	feature,
		QgsRenderContext &	context
	)

overridevirtual

Called before the layer will be rendered for a particular feature.

This is always followed by a call to stopFeatureRender() after the feature has been completely rendered (i.e. all parts have been rendered).

The default implementation does nothing.

Note: In some circumstances, startFeatureRender() and stopFeatureRender() may not be called before a symbol layer is rendered. E.g., when a symbol layer is being rendered in isolation and not as a result of rendering a feature (for instance, when rendering a legend patch or other non-feature based shape).

See also: stopFeatureRender(); startRender()

Since: QGIS 3.12

Reimplemented from QgsSymbolLayer.

Definition at line 1543 of file qgslinesymbollayer.cpp.

◆ stopFeatureRender()

void QgsTemplatedLineSymbolLayerBase::stopFeatureRender	(	const QgsFeature &	feature,
		QgsRenderContext &	context
	)

overridevirtual

Called after the layer has been rendered for a particular feature.

This is always preceded by a call to startFeatureRender() just before the feature will be rendered.

The default implementation does nothing.

Note: In some circumstances, startFeatureRender() and stopFeatureRender() may not be called before a symbol layer is rendered. E.g., when a symbol layer is being rendered in isolation and not as a result of rendering a feature (for instance, when rendering a legend patch or other non-feature based shape).

See also: startFeatureRender(); stopRender()

Since: QGIS 3.12

Reimplemented from QgsSymbolLayer.

Definition at line 1551 of file qgslinesymbollayer.cpp.

◆ symbolAngle()

virtual double QgsTemplatedLineSymbolLayerBase::symbolAngle ( ) const

protectedpure virtual

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

Implemented in QgsMarkerLineSymbolLayer, and QgsHashedLineSymbolLayer.

Friends And Related Symbol Documentation

◆ TestQgsMarkerLineSymbol

friend class TestQgsMarkerLineSymbol

friend

Definition at line 908 of file qgslinesymbollayer.h.

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

/build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/symbology/qgslinesymbollayer.h
/build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/symbology/qgslinesymbollayer.cpp

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsTemplatedLineSymbolLayerBase()

◆ ~QgsTemplatedLineSymbolLayerBase()

Member Function Documentation

◆ averageAngleLength()

◆ averageAngleMapUnitScale()

◆ averageAngleUnit()

◆ canCauseArtifactsBetweenAdjacentTiles()

◆ copyTemplateSymbolProperties()

◆ interval()

◆ intervalMapUnitScale()

◆ intervalUnit()

◆ mapUnitScale()

◆ offsetAlongLine()

◆ offsetAlongLineMapUnitScale()

◆ offsetAlongLineUnit()

◆ outputUnit()

◆ placement()

◆ placements()

◆ placeOnEveryPart()

◆ properties()

◆ renderPolygonStroke()

◆ renderPolyline()

◆ renderSymbol()

◆ rotateSymbols()

◆ setAverageAngleLength()

◆ setAverageAngleMapUnitScale()

◆ setAverageAngleUnit()

◆ setCommonProperties()

◆ setInterval()

◆ setIntervalMapUnitScale()

◆ setIntervalUnit()

◆ setMapUnitScale()

◆ setOffsetAlongLine()

◆ setOffsetAlongLineMapUnitScale()

◆ setOffsetAlongLineUnit()

◆ setOutputUnit()

◆ setPlacement()

◆ setPlacements()

◆ setPlaceOnEveryPart()

◆ setRotateSymbols()

◆ setSymbolAngle()

◆ setSymbolLineAngle()

◆ startFeatureRender()

◆ stopFeatureRender()

◆ symbolAngle()

Friends And Related Symbol Documentation

◆ TestQgsMarkerLineSymbol