A symbol layer that represents vector layer line feature as interpolated line The interpolation is done between two values defined at the extremities. More...

#include <qgsinterpolatedlinerenderer.h>

Inheritance diagram for QgsInterpolatedLineSymbolLayer:

[legend]

Public Member Functions
	QgsInterpolatedLineSymbolLayer ()

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.

QgsInterpolatedLineSymbolLayer *	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.

void	drawPreviewIcon (QgsSymbolRenderContext &context, QSize size) override

Q_DECL_DEPRECATED QString	endValueExpressionForColor () const
	Returns the expression related to the end extremity value for width for color.

Q_DECL_DEPRECATED QString	endValueExpressionForWidth () const
	Returns the expression related to the end extremity value for width.

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

QgsInterpolatedLineColor	interpolatedColor () const
	Returns the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor.

QgsInterpolatedLineWidth	interpolatedWidth () const
	Returns the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth.

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

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

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 void	setExpressionsStringForColor (const QString &start, const QString &end)
	Sets the expressions (as string) that define the extremety values af the line feature for color.

Q_DECL_DEPRECATED void	setExpressionsStringForWidth (const QString &start, const QString &end)
	Sets the expressions (as string) that define the extremety values af the line feature for width.

void	setInterpolatedColor (const QgsInterpolatedLineColor &interpolatedLineColor)
	Sets the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor.

void	setInterpolatedWidth (const QgsInterpolatedLineWidth &interpolatedLineWidth)
	Sets the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth.

void	setWidthUnit (Qgis::RenderUnit strokeWidthUnit)
	Sets the width unit.

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

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

Q_DECL_DEPRECATED QString	startValueExpressionForColor () const
	Returns the epression related to the start extremity value for width for color.

Q_DECL_DEPRECATED QString	startValueExpressionForWidth () const
	Returns the epression related to the start extremity value for width.

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

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

Qgis::RenderUnit	widthUnit () const
	Returns the width unit.

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.

QgsMapUnitScale	mapUnitScale () const override

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

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

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.

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	setMapUnitScale (const QgsMapUnitScale &scale) override

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

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 ()

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 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 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 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

Static Public Member Functions
static QgsSymbolLayer *	create (const QVariantMap &properties)
	Creates the symbol layer.

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

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...

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.

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

A symbol layer that represents vector layer line feature as interpolated line The interpolation is done between two values defined at the extremities.

Since: QGIS 3.20

Definition at line 283 of file qgsinterpolatedlinerenderer.h.

Constructor & Destructor Documentation

◆ QgsInterpolatedLineSymbolLayer()

QgsInterpolatedLineSymbolLayer::QgsInterpolatedLineSymbolLayer ( )

Definition at line 1107 of file qgsinterpolatedlinerenderer.cpp.

Member Function Documentation

◆ canCauseArtifactsBetweenAdjacentTiles()

bool QgsInterpolatedLineSymbolLayer::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 1222 of file qgsinterpolatedlinerenderer.cpp.

◆ clone()

QgsInterpolatedLineSymbolLayer * QgsInterpolatedLineSymbolLayer::clone ( ) const

overridevirtual

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

Implements QgsSymbolLayer.

Definition at line 816 of file qgsinterpolatedlinerenderer.cpp.

◆ color()

QColor QgsInterpolatedLineSymbolLayer::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 932 of file qgsinterpolatedlinerenderer.cpp.

◆ create()

QgsSymbolLayer * QgsInterpolatedLineSymbolLayer::create ( const QVariantMap & properties )

static

Creates the symbol layer.

Definition at line 824 of file qgsinterpolatedlinerenderer.cpp.

◆ drawPreviewIcon()

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

overridevirtual

Implements QgsSymbolLayer.

Definition at line 899 of file qgsinterpolatedlinerenderer.cpp.

◆ endValueExpressionForColor()

QString QgsInterpolatedLineSymbolLayer::endValueExpressionForColor ( ) const

Returns the expression related to the end extremity value for width for color.

Deprecated:: QGIS 3.40. Use dataDefinedProperty( QgsSymbolLayer::PropertyLineEndColorValue ) instead.

Definition at line 1000 of file qgsinterpolatedlinerenderer.cpp.

◆ endValueExpressionForWidth()

QString QgsInterpolatedLineSymbolLayer::endValueExpressionForWidth ( ) const

Returns the expression related to the end extremity value for width.

Deprecated:: QGIS 3.40. Use dataDefinedProperty( QgsSymbolLayer::PropertyLineEndWidthValue ) instead.

Definition at line 963 of file qgsinterpolatedlinerenderer.cpp.

◆ flags()

Qgis::SymbolLayerFlags QgsInterpolatedLineSymbolLayer::flags ( ) const

overridevirtual

Returns flags which control the symbol layer's behavior.

Since: QGIS 3.22

Reimplemented from QgsSymbolLayer.

Definition at line 869 of file qgsinterpolatedlinerenderer.cpp.

◆ interpolatedColor()

QgsInterpolatedLineColor QgsInterpolatedLineSymbolLayer::interpolatedColor ( ) const

Returns the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor.

See also: setInterpolatedColor()

Definition at line 1010 of file qgsinterpolatedlinerenderer.cpp.

◆ interpolatedWidth()

QgsInterpolatedLineWidth QgsInterpolatedLineSymbolLayer::interpolatedWidth ( ) const

Returns the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth.

See also: setInterpolatedWidth()

Definition at line 980 of file qgsinterpolatedlinerenderer.cpp.

◆ layerType()

QString QgsInterpolatedLineSymbolLayer::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 806 of file qgsinterpolatedlinerenderer.cpp.

◆ properties()

QVariantMap QgsInterpolatedLineSymbolLayer::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 876 of file qgsinterpolatedlinerenderer.cpp.

◆ renderPolyline()

void QgsInterpolatedLineSymbolLayer::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 1202 of file qgsinterpolatedlinerenderer.cpp.

◆ setExpressionsStringForColor()

void QgsInterpolatedLineSymbolLayer::setExpressionsStringForColor	(	const QString &	start,
		const QString &	end
	)

Sets the expressions (as string) that define the extremety values af the line feature for color.

Deprecated:: QGIS 3.40. Use setDataDefinedProperty( QgsSymbolLayer::PropertyLineStartColorValue ) and setDataDefinedProperty( QgsSymbolLayer::PropertyLineEndColorValue ) instead.

Definition at line 982 of file qgsinterpolatedlinerenderer.cpp.

◆ setExpressionsStringForWidth()

void QgsInterpolatedLineSymbolLayer::setExpressionsStringForWidth	(	const QString &	start,
		const QString &	end
	)

Sets the expressions (as string) that define the extremety values af the line feature for width.

Deprecated:: QGIS 3.40. Use setDataDefinedProperty( QgsSymbolLayer::PropertyLineStartWidthValue ) and setDataDefinedProperty( QgsSymbolLayer::PropertyLineEndWidthValue ) instead.

Definition at line 945 of file qgsinterpolatedlinerenderer.cpp.

◆ setInterpolatedColor()

void QgsInterpolatedLineSymbolLayer::setInterpolatedColor ( const QgsInterpolatedLineColor & interpolatedLineColor )

Sets the interpolated color used to render the colors of lines, see QgsInterpolatedLineColor.

See also: interpolatedColor()

Definition at line 1005 of file qgsinterpolatedlinerenderer.cpp.

◆ setInterpolatedWidth()

void QgsInterpolatedLineSymbolLayer::setInterpolatedWidth ( const QgsInterpolatedLineWidth & interpolatedLineWidth )

Sets the interpolated width used to render the width of lines, see QgsInterpolatedLineWidth.

See also: interpolatedWidth()

Definition at line 975 of file qgsinterpolatedlinerenderer.cpp.

◆ setWidthUnit()

void QgsInterpolatedLineSymbolLayer::setWidthUnit ( Qgis::RenderUnit strokeWidthUnit )

Sets the width unit.

See also: widthUnit()

Definition at line 968 of file qgsinterpolatedlinerenderer.cpp.

◆ startFeatureRender()

void QgsInterpolatedLineSymbolLayer::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 1110 of file qgsinterpolatedlinerenderer.cpp.

◆ startRender()

void QgsInterpolatedLineSymbolLayer::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 808 of file qgsinterpolatedlinerenderer.cpp.

◆ startValueExpressionForColor()

QString QgsInterpolatedLineSymbolLayer::startValueExpressionForColor ( ) const

Returns the epression related to the start extremity value for width for color.

Deprecated:: QGIS 3.40. Use dataDefinedProperty( QgsSymbolLayer::PropertyLineStartColorValue ) instead.

Definition at line 995 of file qgsinterpolatedlinerenderer.cpp.

◆ startValueExpressionForWidth()

QString QgsInterpolatedLineSymbolLayer::startValueExpressionForWidth ( ) const

Returns the epression related to the start extremity value for width.

Deprecated:: QGIS 3.40. Use dataDefinedProperty( QgsSymbolLayer::PropertyLineStartWidthValue ) instead.

Definition at line 958 of file qgsinterpolatedlinerenderer.cpp.

◆ stopFeatureRender()

void QgsInterpolatedLineSymbolLayer::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 1116 of file qgsinterpolatedlinerenderer.cpp.

◆ stopRender()

void QgsInterpolatedLineSymbolLayer::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 812 of file qgsinterpolatedlinerenderer.cpp.

◆ widthUnit()

Qgis::RenderUnit QgsInterpolatedLineSymbolLayer::widthUnit ( ) const

Returns the width unit.

See also: setWidthUnit()

Definition at line 973 of file qgsinterpolatedlinerenderer.cpp.

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

/build/qgis-3.41.0+git20241122+3440c17df1d+99sid/src/core/symbology/qgsinterpolatedlinerenderer.h
/build/qgis-3.41.0+git20241122+3440c17df1d+99sid/src/core/symbology/qgsinterpolatedlinerenderer.cpp

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsInterpolatedLineSymbolLayer()

Member Function Documentation

◆ canCauseArtifactsBetweenAdjacentTiles()

◆ clone()

◆ color()

◆ create()

◆ drawPreviewIcon()

◆ endValueExpressionForColor()

◆ endValueExpressionForWidth()

◆ flags()

◆ interpolatedColor()

◆ interpolatedWidth()

◆ layerType()

◆ properties()

◆ renderPolyline()

◆ setExpressionsStringForColor()

◆ setExpressionsStringForWidth()

◆ setInterpolatedColor()

◆ setInterpolatedWidth()

◆ setWidthUnit()

◆ startFeatureRender()

◆ startRender()

◆ startValueExpressionForColor()

◆ startValueExpressionForWidth()

◆ stopFeatureRender()

◆ stopRender()

◆ widthUnit()