Line symbol layer type which draws line sections using a raster image file. More...

#include <qgslinesymbollayer.h>

Inheritance diagram for QgsRasterLineSymbolLayer:

[legend]

Public Member Functions
	QgsRasterLineSymbolLayer (const QString &path=QString())
	Constructor for QgsRasterLineSymbolLayer, with the specified raster image path.

virtual	~QgsRasterLineSymbolLayer ()

QgsRasterLineSymbolLayer *	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.

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

QgsMapUnitScale	mapUnitScale () const override

double	opacity () const
	Returns the line opacity.

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

QString	path () const
	Returns the raster image path.

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.

void	setMapUnitScale (const QgsMapUnitScale &scale) override

void	setOpacity (double opacity)
	Set the line opacity.

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

void	setPath (const QString &path)
	Set the raster image path.

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.

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

Public Member Functions inherited from QgsAbstractBrushedLineSymbolLayer
Qt::PenCapStyle	penCapStyle () const
	Returns the pen cap style used to render the line (e.g.

Qt::PenJoinStyle	penJoinStyle () const
	Returns the pen join style used to render the line (e.g.

void	setPenCapStyle (Qt::PenCapStyle style)
	Sets the pen cap style used to render the line (e.g.

void	setPenJoinStyle (Qt::PenJoinStyle style)
	Sets the pen join style used to render the line (e.g.

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

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
	QgsLineSymbolLayer cannot be copied.

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

virtual	~QgsSymbolLayer ()

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

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.

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

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

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

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

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

virtual QString	ogrFeatureStyle (double mmScaleFactor, double mapUnitScaleFactor) const

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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	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 QgsRasterLineSymbolLayer, using the settings serialized in the properties map (corresponding to the output from QgsRasterLineSymbolLayer::properties() ).

static void	resolvePaths (QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving)
	Turns relative paths in properties map to absolute when reading and vice versa when writing.

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

Protected Attributes
QImage	mLineImage

double	mOpacity = 1.0

QString	mPath

Protected Attributes inherited from QgsAbstractBrushedLineSymbolLayer
Qt::PenCapStyle	mPenCapStyle = Qt::PenCapStyle::RoundCap

Qt::PenJoinStyle	mPenJoinStyle = Qt::PenJoinStyle::RoundJoin

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 }
	Data definable properties. More...

Protected Member Functions inherited from QgsAbstractBrushedLineSymbolLayer
void	renderPolylineUsingBrush (const QPolygonF &points, QgsSymbolRenderContext &context, const QBrush &brush, double patternThickness, double patternLength)
	Renders a polyline of points using the specified brush.

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

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

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

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

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 line sections using a raster image file.

Since: QGIS 3.24

Definition at line 1202 of file qgslinesymbollayer.h.

Constructor & Destructor Documentation

◆ QgsRasterLineSymbolLayer()

QgsRasterLineSymbolLayer::QgsRasterLineSymbolLayer ( const QString & path = QString() )

Constructor for QgsRasterLineSymbolLayer, with the specified raster image path.

Definition at line 3327 of file qgslinesymbollayer.cpp.

◆ ~QgsRasterLineSymbolLayer()

QgsRasterLineSymbolLayer::~QgsRasterLineSymbolLayer ( )

virtualdefault

Member Function Documentation

◆ clone()

QgsRasterLineSymbolLayer * QgsRasterLineSymbolLayer::clone ( ) const

overridevirtual

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

Implements QgsSymbolLayer.

Definition at line 3402 of file qgslinesymbollayer.cpp.

◆ color()

QColor QgsRasterLineSymbolLayer::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 3555 of file qgslinesymbollayer.cpp.

◆ create()

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

static

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

Definition at line 3334 of file qgslinesymbollayer.cpp.

◆ estimateMaxBleed()

double QgsRasterLineSymbolLayer::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 3550 of file qgslinesymbollayer.cpp.

◆ layerType()

QString QgsRasterLineSymbolLayer::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 3436 of file qgslinesymbollayer.cpp.

◆ mapUnitScale()

QgsMapUnitScale QgsRasterLineSymbolLayer::mapUnitScale ( ) const

overridevirtual

Reimplemented from QgsLineSymbolLayer.

Definition at line 3540 of file qgslinesymbollayer.cpp.

◆ opacity()

double QgsRasterLineSymbolLayer::opacity ( ) const

inline

Returns the line opacity.

Returns: opacity value between 0 (fully transparent) and 1 (fully opaque)

See also: setOpacity()

Definition at line 1242 of file qgslinesymbollayer.h.

◆ outputUnit()

Qgis::RenderUnit QgsRasterLineSymbolLayer::outputUnit ( ) const

overridevirtual

Returns the units to use for sizes and widths within the symbol layer.

Individual symbol layer subclasses will interpret this in different ways, e.g., a marker symbol layer may use it to specify the units for the marker size, while a line symbol layer may use it to specify the units for the line width.

Returns: output unit, or QgsUnitTypes::RenderUnknownUnit if the symbol layer contains mixed units

See also: setOutputUnit()

Reimplemented from QgsLineSymbolLayer.

Definition at line 3518 of file qgslinesymbollayer.cpp.

◆ path()

QString QgsRasterLineSymbolLayer::path ( ) const

inline

Returns the raster image path.

See also: setPath()

Definition at line 1229 of file qgslinesymbollayer.h.

◆ properties()

QVariantMap QgsRasterLineSymbolLayer::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 3381 of file qgslinesymbollayer.cpp.

◆ renderPolyline()

void QgsRasterLineSymbolLayer::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 3459 of file qgslinesymbollayer.cpp.

◆ resolvePaths()

void QgsRasterLineSymbolLayer::resolvePaths	(	QVariantMap &	properties,
		const QgsPathResolver &	pathResolver,
		bool	saving
	)

static

Turns relative paths in properties map to absolute when reading and vice versa when writing.

Used internally when reading/writing symbols.

Definition at line 3419 of file qgslinesymbollayer.cpp.

◆ setMapUnitScale()

void QgsRasterLineSymbolLayer::setMapUnitScale ( const QgsMapUnitScale & scale )

overridevirtual

Reimplemented from QgsLineSymbolLayer.

Definition at line 3534 of file qgslinesymbollayer.cpp.

◆ setOpacity()

void QgsRasterLineSymbolLayer::setOpacity ( double opacity )

inline

Set the line opacity.

Parameters

opacity opacity value between 0 (fully transparent) and 1 (fully opaque)

See also: opacity()

Definition at line 1249 of file qgslinesymbollayer.h.

◆ setOutputUnit()

void QgsRasterLineSymbolLayer::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 3511 of file qgslinesymbollayer.cpp.

◆ setPath()

void QgsRasterLineSymbolLayer::setPath ( const QString & path )

Set the raster image path.

See also: path()

Definition at line 3431 of file qgslinesymbollayer.cpp.

◆ startRender()

void QgsRasterLineSymbolLayer::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 3441 of file qgslinesymbollayer.cpp.

◆ stopRender()

void QgsRasterLineSymbolLayer::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 3455 of file qgslinesymbollayer.cpp.

◆ usesMapUnits()

bool QgsRasterLineSymbolLayer::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 3528 of file qgslinesymbollayer.cpp.

Member Data Documentation

◆ mLineImage

QImage QgsRasterLineSymbolLayer::mLineImage

protected

Definition at line 1268 of file qgslinesymbollayer.h.

◆ mOpacity

double QgsRasterLineSymbolLayer::mOpacity = 1.0

protected

Definition at line 1267 of file qgslinesymbollayer.h.

◆ mPath

QString QgsRasterLineSymbolLayer::mPath

protected

Definition at line 1266 of file qgslinesymbollayer.h.

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

/home/fischer/src/qgis-3.38/src/core/symbology/qgslinesymbollayer.h
/home/fischer/src/qgis-3.38/src/core/symbology/qgslinesymbollayer.cpp

Public Member Functions

Static Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsRasterLineSymbolLayer()

◆ ~QgsRasterLineSymbolLayer()

Member Function Documentation

◆ clone()

◆ color()

◆ create()

◆ estimateMaxBleed()

◆ layerType()

◆ mapUnitScale()

◆ opacity()

◆ outputUnit()

◆ path()

◆ properties()

◆ renderPolyline()

◆ resolvePaths()

◆ setMapUnitScale()

◆ setOpacity()

◆ setOutputUnit()

◆ setPath()

◆ startRender()

◆ stopRender()

◆ usesMapUnits()

Member Data Documentation

◆ mLineImage

◆ mOpacity

◆ mPath