Contains utility functions for working with symbols and symbol layers. More...

#include <qgssymbollayerutils.h>

Static Public Member Functions
static void	appendPolyline (QPolygonF &target, const QPolygonF &line)
	Appends a polyline line to an existing target polyline.

static void	applyScaleDependency (QDomDocument &doc, QDomElement &ruleElem, QVariantMap &props)
	Checks if the properties contain scaleMinDenom and scaleMaxDenom, if available, they are added into the SE Rule element.

static void	blurImageInPlace (QImage &image, QRect rect, int radius, bool alphaOnly)
	Blurs an image in place, e.g. creating Qt-independent drop shadows.

static void	clearSymbolLayerIds (QgsSymbol *symbol)
	Remove recursively unique id from all symbol symbol layers and set an empty string instead.

static void	clearSymbolLayerIds (QgsSymbolLayer *symbolLayer)
	Remove recursively unique id from symbolLayer and its children and set an empty string instead.

static void	clearSymbolMap (QgsSymbolMap &symbols)

static QVector< QgsGeometry >	collectSymbolLayerClipGeometries (const QgsRenderContext &context, const QString &symbolLayerId, const QRectF &bounds)
	Returns a list of the symbol layer clip geometries to be used for the symbol layer with the specified ID.

static QColor	colorFromMimeData (const QMimeData *data, bool &hasAlpha)
	Attempts to parse mime data as a color.

static QgsNamedColorList	colorListFromMimeData (const QMimeData *data)
	Attempts to parse mime data as a list of named colors.

static QMimeData *	colorListToMimeData (const QgsNamedColorList &colorList, bool allFormats=true)
	Creates mime data from a list of named colors.

static QIcon	colorRampPreviewIcon (QgsColorRamp *ramp, QSize size, int padding=0)
	Returns an icon preview for a color ramp.

static QPixmap	colorRampPreviewPixmap (QgsColorRamp *ramp, QSize size, int padding=0, Qt::Orientation direction=Qt::Horizontal, bool flipDirection=false, bool drawTransparentBackground=true)
	Returns a pixmap preview for a color ramp.

static QVariant	colorRampToVariant (const QString &name, QgsColorRamp *ramp)
	Saves a color ramp to a QVariantMap, wrapped in a QVariant.

static QMimeData *	colorToMimeData (const QColor &color)
	Creates mime data from a color.

static QString	colorToName (const QColor &color)
	Returns a friendly display name for a color.

static bool	condenseFillAndOutline (QgsFillSymbolLayer fill, QgsLineSymbolLayer outline)
	Attempts to condense a fill and outline layer, by moving the outline layer to the fill symbol's stroke.

static bool	convertPolygonSymbolizerToPointMarker (QDomElement &element, QList< QgsSymbolLayer * > &layerList)
	Converts a polygon symbolizer element to a list of marker symbol layers.

static void	createAnchorPointElement (QDomDocument &doc, QDomElement &element, QPointF anchor)
	Creates a SE 1.1 anchor point element as a child of the specified element.

static void	createDisplacementElement (QDomDocument &doc, QDomElement &element, QPointF offset)

static bool	createExpressionElement (QDomDocument &doc, QDomElement &element, const QString &function)
	Creates a OGC Expression element based on the provided function expression.

static QgsSymbolLayer *	createFillLayerFromSld (QDomElement &element)

static bool	createFunctionElement (QDomDocument &doc, QDomElement &element, const QString &function)

static void	createGeometryElement (QDomDocument &doc, QDomElement &element, const QString &geomFunc)

static QgsSymbolLayer *	createLineLayerFromSld (QDomElement &element)

static QgsSymbolLayer *	createMarkerLayerFromSld (QDomElement &element)

static void	createOnlineResourceElement (QDomDocument &doc, QDomElement &element, const QString &path, const QString &format)

static void	createOpacityElement (QDomDocument &doc, QDomElement &element, const QString &alphaFunc)

static void	createRotationElement (QDomDocument &doc, QDomElement &element, const QString &rotationFunc)

static QDomElement	createSvgParameterElement (QDomDocument &doc, const QString &name, const QString &value)

static bool	createSymbolLayerListFromSld (QDomElement &element, Qgis::GeometryType geomType, QList< QgsSymbolLayer * > &layers)
	Creates a symbol layer list from a DOM element.

static QDomElement	createVendorOptionElement (QDomDocument &doc, const QString &name, const QString &value)

static QgsArrowSymbolLayer::HeadType	decodeArrowHeadType (const QVariant &value, bool *ok=nullptr)
	Decodes a value representing an arrow head type.

static QgsArrowSymbolLayer::ArrowType	decodeArrowType (const QVariant &value, bool *ok=nullptr)
	Decodes a value representing an arrow type.

static QPainter::CompositionMode	decodeBlendMode (const QString &s)

static Qt::BrushStyle	decodeBrushStyle (const QString &str)

static QColor	decodeColor (const QString &str)

static Qgis::SymbolCoordinateReference	decodeCoordinateReference (const QString &string, bool *ok=nullptr)
	Decodes a string representing a symbol coordinate reference mode.

static Qgis::LineClipMode	decodeLineClipMode (const QString &string, bool *ok=nullptr)
	Decodes a string representing a line clip mode.

static QgsMapUnitScale	decodeMapUnitScale (const QString &str)

static Qgis::MarkerClipMode	decodeMarkerClipMode (const QString &string, bool *ok=nullptr)
	Decodes a string representing a marker clip mode.

static Qt::PenCapStyle	decodePenCapStyle (const QString &str)

static Qt::PenJoinStyle	decodePenJoinStyle (const QString &str)

static Qt::PenStyle	decodePenStyle (const QString &str)

static QPointF	decodePoint (const QString &string)
	Decodes a QSizeF from a string.

static QVector< qreal >	decodeRealVector (const QString &s)

static Qgis::ScaleMethod	decodeScaleMethod (const QString &str)
	Decodes a symbol scale method from a string.

static QSizeF	decodeSize (const QString &string)
	Decodes a QSizeF from a string.

static int	decodeSldAlpha (const QString &str)

static Qt::BrushStyle	decodeSldBrushStyle (const QString &str)

static QFont::Style	decodeSldFontStyle (const QString &str)

static int	decodeSldFontWeight (const QString &str)

static Qt::PenCapStyle	decodeSldLineCapStyle (const QString &str)

static Qt::PenJoinStyle	decodeSldLineJoinStyle (const QString &str)

static QVector< qreal >	decodeSldRealVector (const QString &s)

static Qgis::RenderUnit	decodeSldUom (const QString &str, double *scaleFactor=nullptr)
	Decodes a SLD unit of measure string to a render unit.

static bool	displacementFromSldElement (QDomElement &element, QPointF &offset)

static void	drawStippledBackground (QPainter *painter, QRect rect)

static void	drawVertexMarker (double x, double y, QPainter &p, Qgis::VertexMarkerType type, int markerSize)
	Draws a vertex symbol at (painter) coordinates x, y.

static QString	encodeBrushStyle (Qt::BrushStyle style)

static QString	encodeColor (const QColor &color)

static QString	encodeCoordinateReference (Qgis::SymbolCoordinateReference coordinateReference)
	Encodes a symbol coordinate reference mode to a string.

static QString	encodeLineClipMode (Qgis::LineClipMode mode)
	Encodes a line clip mode to a string.

static QString	encodeMapUnitScale (const QgsMapUnitScale &mapUnitScale)

static QString	encodeMarkerClipMode (Qgis::MarkerClipMode mode)
	Encodes a marker clip mode to a string.

static QString	encodePenCapStyle (Qt::PenCapStyle style)

static QString	encodePenJoinStyle (Qt::PenJoinStyle style)

static QString	encodePenStyle (Qt::PenStyle style)

static QString	encodePoint (QPointF point)
	Encodes a QPointF to a string.

static QString	encodeRealVector (const QVector< qreal > &v)

static QString	encodeScaleMethod (Qgis::ScaleMethod scaleMethod)
	Encodes a symbol scale method to a string.

static QString	encodeSize (QSizeF size)
	Encodes a QSizeF to a string.

static QString	encodeSldAlpha (int alpha)

static QString	encodeSldBrushStyle (Qt::BrushStyle style)

static QString	encodeSldFontStyle (QFont::Style style)

static QString	encodeSldFontWeight (int weight)

static QString	encodeSldLineCapStyle (Qt::PenCapStyle style)

static QString	encodeSldLineJoinStyle (Qt::PenJoinStyle style)

static QString	encodeSldRealVector (const QVector< qreal > &v)

static QString	encodeSldUom (Qgis::RenderUnit unit, double *scaleFactor)
	Encodes a render unit into an SLD unit of measure string.

static double	estimateMaxSymbolBleed (QgsSymbol *symbol, const QgsRenderContext &context)
	Returns the maximum estimated bleed for the symbol.

static QgsStringMap	evaluatePropertiesMap (const QMap< QString, QgsProperty > &propertiesMap, const QgsExpressionContext &context)
	Evaluates a map of properties using the given context and returns a variant map with evaluated expressions from the properties.

static bool	externalGraphicFromSld (QDomElement &element, QString &path, QString &mime, QColor &color, double &size)

static void	externalGraphicToSld (QDomDocument &doc, QDomElement &element, const QString &path, const QString &mime, const QColor &color, double size=-1)

static bool	externalMarkerFromSld (QDomElement &element, QString &path, QString &format, int &markIndex, QColor &color, double &size)

static void	externalMarkerToSld (QDomDocument &doc, QDomElement &element, const QString &path, const QString &format, int *markIndex=nullptr, const QColor &color=QColor(), double size=-1)

static QString	fieldOrExpressionFromExpression (QgsExpression *expression)
	Returns a field name if the whole expression is just a name of the field .

static QgsExpression *	fieldOrExpressionToExpression (const QString &fieldOrExpression)
	Returns a new valid expression instance for given field or expression string.

static bool	fillFromSld (QDomElement &element, Qt::BrushStyle &brushStyle, QColor &color)

static void	fillToSld (QDomDocument &doc, QDomElement &element, Qt::BrushStyle brushStyle, const QColor &color=QColor())

static bool	functionFromSldElement (QDomElement &element, QString &function)

static bool	geometryFromSldElement (QDomElement &element, QString &geomFunc)

static QgsStringMap	getSvgParameterList (QDomElement &element)

static QString	getSvgParametricPath (const QString &basePath, const QColor &fillColor, const QColor &strokeColor, double strokeWidth)
	Encodes a reference to a parametric SVG into a path with parameters according to the SVG Parameters spec.

static QgsStringMap	getVendorOptionList (QDomElement &element)

static bool	hasExternalGraphic (QDomElement &element)
	Checks if element contains an ExternalGraphic element with format "image/svg+xml".

static bool	hasExternalGraphicV2 (QDomElement &element, const QString format=QString())
	Checks if element contains an ExternalGraphic element, if the optional format is specified it will also be checked.

static bool	hasWellKnownMark (QDomElement &element)

static QgsNamedColorList	importColorsFromGpl (QFile &file, bool &ok, QString &name)
	Imports colors from a gpl GIMP palette file.

static bool	isSharpCorner (QPointF p1, QPointF p2, QPointF p3)
	Returns `true` if the angle formed by the line p1 - p2 - p3 forms a "sharp" corner.

static void	labelTextToSld (QDomDocument &doc, QDomElement &element, const QString &label, const QFont &font, const QColor &color=QColor(), double size=-1)

static bool	lineFromSld (QDomElement &element, Qt::PenStyle &penStyle, QColor &color, double &width, Qt::PenJoinStyle penJoinStyle=nullptr, Qt::PenCapStyle penCapStyle=nullptr, QVector< qreal > customDashPattern=nullptr, double dashOffset=nullptr)

static void	lineToSld (QDomDocument &doc, QDomElement &element, Qt::PenStyle penStyle, const QColor &color, double width=-1, const Qt::PenJoinStyle penJoinStyle=nullptr, const Qt::PenCapStyle penCapStyle=nullptr, const QVector< qreal > *customDashPattern=nullptr, double dashOffset=0.0)

static QStringList	listSvgFiles ()
	Returns a list of all available svg files.

static QStringList	listSvgFilesAt (const QString &directory)
	Returns a list of svg files at the specified directory.

static QgsColorRamp *	loadColorRamp (const QVariant &value)
	Load a color ramp from a QVariantMap, wrapped in a QVariant.

static QgsColorRamp *	loadColorRamp (QDomElement &element)
	Creates a color ramp from the settings encoded in an XML element.

static QgsSymbol *	loadSymbol (const QDomElement &element, const QgsReadWriteContext &context)
	Attempts to load a symbol from a DOM element.

template<class SymbolType >
static SymbolType *	loadSymbol (const QDomElement &element, const QgsReadWriteContext &context)
	Attempts to load a symbol from a DOM element and cast it to a particular symbol type.

static QgsSymbolLayer *	loadSymbolLayer (QDomElement &element, const QgsReadWriteContext &context)
	Reads and returns symbol layer from XML. Caller is responsible for deleting the returned object.

static QgsSymbolMap	loadSymbols (QDomElement &element, const QgsReadWriteContext &context)
	Reads a collection of symbols from XML and returns them in a map. Caller is responsible for deleting returned symbols.

static void	mergeScaleDependencies (double mScaleMinDenom, double mScaleMaxDenom, QVariantMap &props)
	Merges the local scale limits, if any, with the ones already in the map, if any.

static void	multiplyImageOpacity (QImage *image, qreal opacity)
	Multiplies opacity of image pixel values with a (global) transparency value.

static bool	needEllipseMarker (QDomElement &element)

static bool	needFontMarker (QDomElement &element)

static bool	needLinePatternFill (QDomElement &element)

static bool	needMarkerLine (QDomElement &element)

static bool	needPointPatternFill (QDomElement &element)

static bool	needRasterImageFill (QDomElement &element)
	Checks if element contains a graphic fill with a raster image of type PNG, JPEG or GIF.

static bool	needSvgFill (QDomElement &element)

static bool	needSvgMarker (QDomElement &element)

static QString	ogrFeatureStyleBrush (const QColor &fillColr)
	Create ogr feature style string for brush.

static QString	ogrFeatureStylePen (double width, double mmScaleFactor, double mapUnitsScaleFactor, const QColor &c, Qt::PenJoinStyle joinStyle=Qt::MiterJoin, Qt::PenCapStyle capStyle=Qt::FlatCap, double offset=0.0, const QVector< qreal > *dashPattern=nullptr)
	Create ogr feature style string for pen.

static bool	onlineResourceFromSldElement (QDomElement &element, QString &path, QString &format)

static bool	opacityFromSldElement (QDomElement &element, QString &alphaFunc)

static void	parametricSvgToSld (QDomDocument &doc, QDomElement &graphicElem, const QString &path, const QColor &fillColor, double size, const QColor &strokeColor, double strokeWidth)
	Encodes a reference to a parametric SVG into SLD, as a succession of parametric SVG using URL parameters, a fallback SVG without parameters, and a final fallback as a mark with the right colors and stroke for systems that cannot do SVG at all.

static QColor	parseColor (const QString &colorStr, bool strictEval=false)
	Attempts to parse a string as a color using a variety of common formats, including hex codes, rgb and rgba strings.

static QList< QColor >	parseColorList (const QString &colorStr)
	Attempts to parse a string as a list of colors using a variety of common formats, including hex codes, rgb and rgba strings.

static QColor	parseColorWithAlpha (const QString &colorStr, bool &containsAlpha, bool strictEval=false)
	Attempts to parse a string as a color using a variety of common formats, including hex codes, rgb and rgba, hsl and hsla strings.

static QVariantMap	parseProperties (const QDomElement &element)
	Parses the properties from XML and returns a map.

static bool	pointInPolygon (const QPolygonF &points, QPointF point)
	Calculate whether a point is within of a QPolygonF.

static QPointF	pointOnLineWithDistance (QPointF startPoint, QPointF directionPoint, double distance)
	Returns a point on the line from startPoint to directionPoint that is a certain distance away from the starting point.

static QPointF	polygonCentroid (const QPolygonF &points)
	Calculate the centroid point of a QPolygonF.

static QPointF	polygonPointOnSurface (const QPolygonF &points, const QVector< QPolygonF > *rings=nullptr)
	Calculate a point on the surface of a QPolygonF.

static double	polylineLength (const QPolygonF &polyline)
	Returns the total length of a polyline.

static QPolygonF	polylineSubstring (const QPolygonF &polyline, double startOffset, double endOffset)
	Returns the substring of a polyline which starts at startOffset from the beginning of the line and ends at endOffset from the start of the line.

static void	premultiplyColor (QColor &rgb, int alpha)
	Converts a QColor into a premultiplied ARGB QColor value using a specified alpha value.

static QList< double >	prettyBreaks (double minimum, double maximum, int classes)
	Computes a sequence of about 'classes' equally spaced round values which cover the range of values from 'minimum' to 'maximum'.

static double	rendererFrameRate (const QgsFeatureRenderer *renderer)
	Calculates the frame rate (in frames per second) at which the given renderer must be redrawn.

static QVector< qreal >	rescaleUom (const QVector< qreal > &array, Qgis::RenderUnit unit, const QVariantMap &props)
	Rescales the given array based on the uomScale found in the props, if any is found, otherwise returns a copy of the original point.

static double	rescaleUom (double size, Qgis::RenderUnit unit, const QVariantMap &props)
	Rescales the given size based on the uomScale found in the props, if any is found, otherwise returns the value un-modified.

static QPointF	rescaleUom (QPointF point, Qgis::RenderUnit unit, const QVariantMap &props)
	Rescales the given point based on the uomScale found in the props, if any is found, otherwise returns a copy of the original point.

static void	resetSymbolLayerIds (QgsSymbol *symbol)
	Regenerate recursively unique id from all symbol symbol layers.

static void	resetSymbolLayerIds (QgsSymbolLayer *symbolLayer)
	Regenerate recursively unique id from symbolLayer and its children.

static QgsSymbol *	restrictedSizeSymbol (const QgsSymbol s, double minSize, double maxSize, QgsRenderContext context, double &width, double &height, bool *ok=nullptr)
	Creates a new symbol with size restricted to min/max size if original size is out of min/max range.

static bool	rotationFromSldElement (QDomElement &element, QString &rotationFunc)

static QDomElement	saveColorRamp (const QString &name, QgsColorRamp *ramp, QDomDocument &doc)
	Encodes a color ramp's settings to an XML element.

static bool	saveColorsToGpl (QFile &file, const QString &paletteName, const QgsNamedColorList &colors)
	Exports colors to a gpl GIMP palette file.

static void	saveProperties (QVariantMap props, QDomDocument &doc, QDomElement &element)
	Saves the map of properties to XML.

static QDomElement	saveSymbol (const QString &symbolName, const QgsSymbol *symbol, QDomDocument &doc, const QgsReadWriteContext &context)
	Writes a symbol definition to XML.

static QDomElement	saveSymbols (QgsSymbolMap &symbols, const QString &tagName, QDomDocument &doc, const QgsReadWriteContext &context)
	Writes a collection of symbols to XML with specified tagName for the top-level element.

static double	sizeInPixelsFromSldUom (const QString &uom, double size)
	Returns the size scaled in pixels according to the uom attribute.

static void	sortVariantList (QList< QVariant > &list, Qt::SortOrder order)
	Sorts the passed list in requested order.

static QString	svgSymbolNameToPath (const QString &name, const QgsPathResolver &pathResolver)
	Determines an SVG symbol's path from its name.

static QString	svgSymbolPathToName (const QString &path, const QgsPathResolver &pathResolver)
	Determines an SVG symbol's name from its path.

static QgsSymbol *	symbolFromMimeData (const QMimeData *data)
	Attempts to parse mime data as a symbol.

static QIcon	symbolLayerPreviewIcon (const QgsSymbolLayer layer, Qgis::RenderUnit u, QSize size, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::SymbolType parentSymbolType=Qgis::SymbolType::Hybrid, QgsMapLayer mapLayer=nullptr, const QgsScreenProperties &screen=QgsScreenProperties())
	Draws a symbol layer preview to an icon.

static QPicture	symbolLayerPreviewPicture (const QgsSymbolLayer *layer, Qgis::RenderUnit units, QSize size, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::SymbolType parentSymbolType=Qgis::SymbolType::Hybrid)
	Draws a symbol layer preview to a QPicture.

static QIcon	symbolPreviewIcon (const QgsSymbol symbol, QSize size, int padding=0, QgsLegendPatchShape shape=nullptr, const QgsScreenProperties &screen=QgsScreenProperties())
	Returns an icon preview for a color ramp.

static QPixmap	symbolPreviewPixmap (const QgsSymbol symbol, QSize size, int padding=0, QgsRenderContext customContext=nullptr, bool selected=false, const QgsExpressionContext expressionContext=nullptr, const QgsLegendPatchShape shape=nullptr, const QgsScreenProperties &screen=QgsScreenProperties())
	Returns a pixmap preview for a color ramp.

static QString	symbolProperties (QgsSymbol *symbol)
	Returns a string representing the symbol.

static QMimeData *	symbolToMimeData (const QgsSymbol *symbol)
	Creates new mime data from a symbol.

static QSize	tileSize (int width, int height, double &angleRad)
	Calculate the minimum size in pixels of a symbol tile given the symbol width and height and the symbol layer rotation angleRad in radians (counter clockwise).

static QPointF	toPoint (const QVariant &value, bool *ok=nullptr)
	Converts a value to a point.

static QList< QList< QPolygonF > >	toQPolygonF (const QgsGeometry &geometry, Qgis::SymbolType type)
	Converts a geometry to a set of QPolygonF objects representing how the geometry should be drawn for a symbol of the given type, as a list of geometry parts and rings.

static QSizeF	toSize (const QVariant &value, bool *ok=nullptr)
	Converts a value to a size.

static Q_DECL_DEPRECATED QSet< const QgsSymbolLayer * >	toSymbolLayerPointers (const QgsFeatureRenderer *renderer, const QSet< QgsSymbolLayerId > &symbolLayerIds)
	Converts a set of symbol layer id to a set of pointers to actual symbol layers carried by the feature renderer.

static bool	wellKnownMarkerFromSld (QDomElement &element, QString &name, QColor &color, QColor &strokeColor, Qt::PenStyle &strokeStyle, double &strokeWidth, double &size)

static void	wellKnownMarkerToSld (QDomDocument &doc, QDomElement &element, const QString &name, const QColor &color, const QColor &strokeColor, Qt::PenStyle strokeStyle, double strokeWidth=-1, double size=-1)

Detailed Description

Contains utility functions for working with symbols and symbol layers.

Definition at line 60 of file qgssymbollayerutils.h.

Member Function Documentation

◆ appendPolyline()

void QgsSymbolLayerUtils::appendPolyline	(	QPolygonF &	target,
		const QPolygonF &	line
	)

static

Appends a polyline line to an existing target polyline.

Any duplicate points at the start line which match the end point from target will be skipped.

Since: QGIS 3.16

Definition at line 4746 of file qgssymbollayerutils.cpp.

◆ applyScaleDependency()

void QgsSymbolLayerUtils::applyScaleDependency	(	QDomDocument &	doc,
		QDomElement &	ruleElem,
		QVariantMap &	props
	)

static

Checks if the properties contain scaleMinDenom and scaleMaxDenom, if available, they are added into the SE Rule element.

Definition at line 5041 of file qgssymbollayerutils.cpp.

◆ blurImageInPlace()

void QgsSymbolLayerUtils::blurImageInPlace	(	QImage &	image,
		QRect	rect,
		int	radius,
		bool	alphaOnly
	)

static

Blurs an image in place, e.g. creating Qt-independent drop shadows.

Definition at line 4131 of file qgssymbollayerutils.cpp.

◆ clearSymbolLayerIds() [1/2]

void QgsSymbolLayerUtils::clearSymbolLayerIds ( QgsSymbol * symbol )

static

Remove recursively unique id from all symbol symbol layers and set an empty string instead.

Since: QGIS 3.30

Definition at line 5572 of file qgssymbollayerutils.cpp.

◆ clearSymbolLayerIds() [2/2]

void QgsSymbolLayerUtils::clearSymbolLayerIds ( QgsSymbolLayer * symbolLayer )

static

Remove recursively unique id from symbolLayer and its children and set an empty string instead.

Since: QGIS 3.30

Definition at line 5577 of file qgssymbollayerutils.cpp.

◆ clearSymbolMap()

void QgsSymbolLayerUtils::clearSymbolMap ( QgsSymbolMap & symbols )

static

Definition at line 3355 of file qgssymbollayerutils.cpp.

◆ collectSymbolLayerClipGeometries()

QVector< QgsGeometry > QgsSymbolLayerUtils::collectSymbolLayerClipGeometries	(	const QgsRenderContext &	context,
		const QString &	symbolLayerId,
		const QRectF &	bounds
	)

static

Returns a list of the symbol layer clip geometries to be used for the symbol layer with the specified ID.

The bounds argument specifies the target bounds (in painter coordinates) for matching geometries. Only mask geometries which intersect bounds will be returned. If bounds is a null QRectF then all clip geometries for the symbol layer will be returned.

Since: QGIS 3.38

Definition at line 5587 of file qgssymbollayerutils.cpp.

◆ colorFromMimeData()

QColor QgsSymbolLayerUtils::colorFromMimeData	(	const QMimeData *	data,
		bool &	hasAlpha
	)

static

Attempts to parse mime data as a color.

Parameters

data	mime data to parse
hasAlpha	will be set to `true` if mime data was interpreted as a color containing an explicit alpha value

Returns: valid color if mimedata could be interpreted as a color, otherwise an invalid color

Definition at line 3581 of file qgssymbollayerutils.cpp.

◆ colorListFromMimeData()

QgsNamedColorList QgsSymbolLayerUtils::colorListFromMimeData ( const QMimeData * data )

static

Attempts to parse mime data as a list of named colors.

Parameters

data	mime data to parse

Returns: list of parsed colors

Definition at line 3609 of file qgssymbollayerutils.cpp.

◆ colorListToMimeData()

QMimeData * QgsSymbolLayerUtils::colorListToMimeData	(	const QgsNamedColorList &	colorList,
		bool	allFormats = `true`
	)

static

Creates mime data from a list of named colors.

Parameters

colorList	list of named colors
allFormats	set to `true` to include additional mime formats, include text/plain and application/x-color

Returns: mime data containing encoded colors

Definition at line 3722 of file qgssymbollayerutils.cpp.

◆ colorRampPreviewIcon()

QIcon QgsSymbolLayerUtils::colorRampPreviewIcon	(	QgsColorRamp *	ramp,
		QSize	size,
		int	padding = `0`
	)

static

Returns an icon preview for a color ramp.

Parameters

ramp	color ramp
size	target icon size
padding	space between icon edge and color ramp

See also: colorRampPreviewPixmap()

Definition at line 1036 of file qgssymbollayerutils.cpp.

◆ colorRampPreviewPixmap()

QPixmap QgsSymbolLayerUtils::colorRampPreviewPixmap	(	QgsColorRamp *	ramp,
		QSize	size,
		int	padding = `0`,
		Qt::Orientation	direction = `Qt::Horizontal`,
		bool	flipDirection = `false`,
		bool	drawTransparentBackground = `true`
	)

static

Returns a pixmap preview for a color ramp.

Parameters

ramp	color ramp
size	target pixmap size
padding	space between icon edge and color ramp
direction	direction to render pixmap (since QGIS 3.18)
flipDirection	set to `true` to flip the direction of the ramp. For horizontal directions, ramps will be rendered left to right by default. For vertical directions, ramps will be rendered top to bottom by default. Setting this flag to `true` will reverse these default directions.
drawTransparentBackground	set to `false` to disable the checkerboard effect drawn below transparent colors in the ramp

See also: colorRampPreviewIcon()

Definition at line 1041 of file qgssymbollayerutils.cpp.

◆ colorRampToVariant()

QVariant QgsSymbolLayerUtils::colorRampToVariant	(	const QString &	name,
		QgsColorRamp *	ramp
	)

static

Saves a color ramp to a QVariantMap, wrapped in a QVariant.

You can use QgsXmlUtils::writeVariant to save it to an XML document.

See also: loadColorRamp( const QVariant &value )

Definition at line 3439 of file qgssymbollayerutils.cpp.

◆ colorToMimeData()

QMimeData * QgsSymbolLayerUtils::colorToMimeData ( const QColor & color )

static

Creates mime data from a color.

Sets both the mime data's color data, and the mime data's text with the color's hex code.

Parameters

color color to encode as mime data

See also: colorFromMimeData

Definition at line 3571 of file qgssymbollayerutils.cpp.

◆ colorToName()

QString QgsSymbolLayerUtils::colorToName ( const QColor & color )

static

Returns a friendly display name for a color.

Parameters

color source color

Returns: display name for color

Definition at line 3490 of file qgssymbollayerutils.cpp.

◆ condenseFillAndOutline()

bool QgsSymbolLayerUtils::condenseFillAndOutline	(	QgsFillSymbolLayer *	fill,
		QgsLineSymbolLayer *	outline
	)

static

Attempts to condense a fill and outline layer, by moving the outline layer to the fill symbol's stroke.

This will only be done if the outline can be transformed into a stroke on the fill layer losslessly. If so, fill will be updated in place with the new stroke. Any existing stroke settings in fill will be replaced.

Returns true if the fill and outline were successfully condensed.

Since: QGIS 3.20

Definition at line 4228 of file qgssymbollayerutils.cpp.

◆ convertPolygonSymbolizerToPointMarker()

bool QgsSymbolLayerUtils::convertPolygonSymbolizerToPointMarker	(	QDomElement &	element,
		QList< QgsSymbolLayer * > &	layerList
	)

static

Converts a polygon symbolizer element to a list of marker symbol layers.

Definition at line 1943 of file qgssymbollayerutils.cpp.

◆ createAnchorPointElement()

void QgsSymbolLayerUtils::createAnchorPointElement	(	QDomDocument &	doc,
		QDomElement &	element,
		QPointF	anchor
	)

static

Creates a SE 1.1 anchor point element as a child of the specified element.

Parameters

doc	The document
element	The parent element
anchor	An anchor specification, with values between 0 and 1

Definition at line 2843 of file qgssymbollayerutils.cpp.

◆ createDisplacementElement()

void QgsSymbolLayerUtils::createDisplacementElement	(	QDomDocument &	doc,
		QDomElement &	element,
		QPointF	offset
	)

static

Definition at line 2825 of file qgssymbollayerutils.cpp.

◆ createExpressionElement()

bool QgsSymbolLayerUtils::createExpressionElement	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	function
	)

static

Creates a OGC Expression element based on the provided function expression.

Parameters

doc	The document owning the element
element	The element parent
function	The expression to be encoded

Definition at line 3043 of file qgssymbollayerutils.cpp.

◆ createFillLayerFromSld()

QgsSymbolLayer * QgsSymbolLayerUtils::createFillLayerFromSld ( QDomElement & element )

static

Definition at line 1656 of file qgssymbollayerutils.cpp.

◆ createFunctionElement()

bool QgsSymbolLayerUtils::createFunctionElement	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	function
	)

static

Definition at line 3059 of file qgssymbollayerutils.cpp.

◆ createGeometryElement()

void QgsSymbolLayerUtils::createGeometryElement	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	geomFunc
	)

static

Definition at line 3000 of file qgssymbollayerutils.cpp.

◆ createLineLayerFromSld()

QgsSymbolLayer * QgsSymbolLayerUtils::createLineLayerFromSld ( QDomElement & element )

static

Definition at line 1681 of file qgssymbollayerutils.cpp.

◆ createMarkerLayerFromSld()

QgsSymbolLayer * QgsSymbolLayerUtils::createMarkerLayerFromSld ( QDomElement & element )

static

Definition at line 1700 of file qgssymbollayerutils.cpp.

◆ createOnlineResourceElement()

void QgsSymbolLayerUtils::createOnlineResourceElement	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	path,
		const QString &	format
	)

static

Definition at line 3121 of file qgssymbollayerutils.cpp.

◆ createOpacityElement()

void QgsSymbolLayerUtils::createOpacityElement	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	alphaFunc
	)

static

Definition at line 2805 of file qgssymbollayerutils.cpp.

◆ createRotationElement()

void QgsSymbolLayerUtils::createRotationElement	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	rotationFunc
	)

static

Definition at line 2784 of file qgssymbollayerutils.cpp.

◆ createSvgParameterElement()

QDomElement QgsSymbolLayerUtils::createSvgParameterElement	(	QDomDocument &	doc,
		const QString &	name,
		const QString &	value
	)

static

Definition at line 3155 of file qgssymbollayerutils.cpp.

◆ createSymbolLayerListFromSld()

bool QgsSymbolLayerUtils::createSymbolLayerListFromSld	(	QDomElement &	element,
		Qgis::GeometryType	geomType,
		QList< QgsSymbolLayer * > &	layers
	)

static

Creates a symbol layer list from a DOM element.

Definition at line 1506 of file qgssymbollayerutils.cpp.

◆ createVendorOptionElement()

QDomElement QgsSymbolLayerUtils::createVendorOptionElement	(	QDomDocument &	doc,
		const QString &	name,
		const QString &	value
	)

static

Definition at line 3202 of file qgssymbollayerutils.cpp.

◆ decodeArrowHeadType()

QgsArrowSymbolLayer::HeadType QgsSymbolLayerUtils::decodeArrowHeadType	(	const QVariant &	value,
		bool *	ok = `nullptr`
	)

static

Decodes a value representing an arrow head type.

Since: QGIS 3.2

Definition at line 422 of file qgssymbollayerutils.cpp.

◆ decodeArrowType()

QgsArrowSymbolLayer::ArrowType QgsSymbolLayerUtils::decodeArrowType	(	const QVariant &	value,
		bool *	ok = `nullptr`
	)

static

Decodes a value representing an arrow type.

Since: QGIS 3.2

Definition at line 447 of file qgssymbollayerutils.cpp.

◆ decodeBlendMode()

QPainter::CompositionMode QgsSymbolLayerUtils::decodeBlendMode ( const QString & s )

static

Definition at line 856 of file qgssymbollayerutils.cpp.

◆ decodeBrushStyle()

Qt::BrushStyle QgsSymbolLayerUtils::decodeBrushStyle ( const QString & str )

static

Definition at line 322 of file qgssymbollayerutils.cpp.

◆ decodeColor()

QColor QgsSymbolLayerUtils::decodeColor ( const QString & str )

static

Definition at line 71 of file qgssymbollayerutils.cpp.

◆ decodeCoordinateReference()

Qgis::SymbolCoordinateReference QgsSymbolLayerUtils::decodeCoordinateReference	(	const QString &	string,
		bool *	ok = `nullptr`
	)

static

Decodes a string representing a symbol coordinate reference mode.

Parameters

string	string to decode
ok	will be set to `true` if string was successfully decoded

Returns: decoded marker clip mode

See also: encodeCoordinateReference()

Since: QGIS 3.24

Definition at line 394 of file qgssymbollayerutils.cpp.

◆ decodeLineClipMode()

Qgis::LineClipMode QgsSymbolLayerUtils::decodeLineClipMode	(	const QString &	string,
		bool *	ok = `nullptr`
	)

static

Decodes a string representing a line clip mode.

Parameters

string	string to decode
ok	will be set to `true` if string was successfully decoded

Returns: decoded line clip mode

See also: encodeLineClipMode()

Since: QGIS 3.24

Definition at line 508 of file qgssymbollayerutils.cpp.

◆ decodeMapUnitScale()

QgsMapUnitScale QgsSymbolLayerUtils::decodeMapUnitScale ( const QString & str )

static

Definition at line 678 of file qgssymbollayerutils.cpp.

◆ decodeMarkerClipMode()

Qgis::MarkerClipMode QgsSymbolLayerUtils::decodeMarkerClipMode	(	const QString &	string,
		bool *	ok = `nullptr`
	)

static

Decodes a string representing a marker clip mode.

Parameters

string	string to decode
ok	will be set to `true` if string was successfully decoded

Returns: decoded marker clip mode

See also: encodeMarkerClipMode()

Since: QGIS 3.24

Definition at line 472 of file qgssymbollayerutils.cpp.

◆ decodePenCapStyle()

Qt::PenCapStyle QgsSymbolLayerUtils::decodePenCapStyle ( const QString & str )

static

Definition at line 252 of file qgssymbollayerutils.cpp.

◆ decodePenJoinStyle()

Qt::PenJoinStyle QgsSymbolLayerUtils::decodePenJoinStyle ( const QString & str )

static

Definition at line 202 of file qgssymbollayerutils.cpp.

◆ decodePenStyle()

Qt::PenStyle QgsSymbolLayerUtils::decodePenStyle ( const QString & str )

static

Definition at line 176 of file qgssymbollayerutils.cpp.

◆ decodePoint()

QPointF QgsSymbolLayerUtils::decodePoint ( const QString & string )

static

Decodes a QSizeF from a string.

See also: encodePoint(); decodeSize()

Definition at line 545 of file qgssymbollayerutils.cpp.

◆ decodeRealVector()

QVector< qreal > QgsSymbolLayerUtils::decodeRealVector ( const QString & s )

static

Definition at line 781 of file qgssymbollayerutils.cpp.

◆ decodeScaleMethod()

Qgis::ScaleMethod QgsSymbolLayerUtils::decodeScaleMethod ( const QString & str )

static

Decodes a symbol scale method from a string.

See also: encodeScaleMethod()

Definition at line 840 of file qgssymbollayerutils.cpp.

◆ decodeSize()

QSizeF QgsSymbolLayerUtils::decodeSize ( const QString & string )

static

Decodes a QSizeF from a string.

See also: encodeSize(); decodePoint()

Definition at line 609 of file qgssymbollayerutils.cpp.

◆ decodeSldAlpha()

int QgsSymbolLayerUtils::decodeSldAlpha ( const QString & str )

static

Definition at line 95 of file qgssymbollayerutils.cpp.

◆ decodeSldBrushStyle()

Qt::BrushStyle QgsSymbolLayerUtils::decodeSldBrushStyle ( const QString & str )

static

Definition at line 379 of file qgssymbollayerutils.cpp.

◆ decodeSldFontStyle()

QFont::Style QgsSymbolLayerUtils::decodeSldFontStyle ( const QString & str )

static

Definition at line 121 of file qgssymbollayerutils.cpp.

◆ decodeSldFontWeight()

int QgsSymbolLayerUtils::decodeSldFontWeight ( const QString & str )

static

Definition at line 141 of file qgssymbollayerutils.cpp.

◆ decodeSldLineCapStyle()

Qt::PenCapStyle QgsSymbolLayerUtils::decodeSldLineCapStyle ( const QString & str )

static

Definition at line 275 of file qgssymbollayerutils.cpp.

◆ decodeSldLineJoinStyle()

Qt::PenJoinStyle QgsSymbolLayerUtils::decodeSldLineJoinStyle ( const QString & str )

static

Definition at line 229 of file qgssymbollayerutils.cpp.

◆ decodeSldRealVector()

QVector< qreal > QgsSymbolLayerUtils::decodeSldRealVector ( const QString & s )

static

Definition at line 810 of file qgssymbollayerutils.cpp.

◆ decodeSldUom()

Qgis::RenderUnit QgsSymbolLayerUtils::decodeSldUom	(	const QString &	str,
		double *	scaleFactor = `nullptr`
	)

static

Decodes a SLD unit of measure string to a render unit.

Parameters

str	string to decode
scaleFactor	if specified, will be set to scale factor for unit of measure

Returns: matching render unit

See also: encodeSldUom()

Definition at line 742 of file qgssymbollayerutils.cpp.

◆ displacementFromSldElement()

bool QgsSymbolLayerUtils::displacementFromSldElement	(	QDomElement &	element,
		QPointF &	offset
	)

static

Definition at line 2860 of file qgssymbollayerutils.cpp.

◆ drawStippledBackground()

void QgsSymbolLayerUtils::drawStippledBackground	(	QPainter *	painter,
		QRect	rect
	)

static

Definition at line 1086 of file qgssymbollayerutils.cpp.

◆ drawVertexMarker()

void QgsSymbolLayerUtils::drawVertexMarker	(	double	x,
		double	y,
		QPainter &	p,
		Qgis::VertexMarkerType	type,
		int	markerSize
	)

static

Draws a vertex symbol at (painter) coordinates x, y.

(Useful to assist vertex editing.)

Since: QGIS 3.4.5

Definition at line 1105 of file qgssymbollayerutils.cpp.

◆ encodeBrushStyle()

QString QgsSymbolLayerUtils::encodeBrushStyle ( Qt::BrushStyle style )

static

Definition at line 283 of file qgssymbollayerutils.cpp.

◆ encodeColor()

QString QgsSymbolLayerUtils::encodeColor ( const QColor & color )

static

Definition at line 66 of file qgssymbollayerutils.cpp.

◆ encodeCoordinateReference()

QString QgsSymbolLayerUtils::encodeCoordinateReference ( Qgis::SymbolCoordinateReference coordinateReference )

static

Encodes a symbol coordinate reference mode to a string.

Parameters

coordinateReference coordinate reference mode

See also: decodeCoordinateReference()

Since: QGIS 3.24

Definition at line 410 of file qgssymbollayerutils.cpp.

◆ encodeLineClipMode()

QString QgsSymbolLayerUtils::encodeLineClipMode ( Qgis::LineClipMode mode )

static

Encodes a line clip mode to a string.

See also: decodeLineClipMode()

Since: QGIS 3.24

Definition at line 526 of file qgssymbollayerutils.cpp.

◆ encodeMapUnitScale()

QString QgsSymbolLayerUtils::encodeMapUnitScale ( const QgsMapUnitScale & mapUnitScale )

static

Definition at line 668 of file qgssymbollayerutils.cpp.

◆ encodeMarkerClipMode()

QString QgsSymbolLayerUtils::encodeMarkerClipMode ( Qgis::MarkerClipMode mode )

static

Encodes a marker clip mode to a string.

See also: decodeMarkerClipMode()

Since: QGIS 3.24

Definition at line 492 of file qgssymbollayerutils.cpp.

◆ encodePenCapStyle()

QString QgsSymbolLayerUtils::encodePenCapStyle ( Qt::PenCapStyle style )

static

Definition at line 237 of file qgssymbollayerutils.cpp.

◆ encodePenJoinStyle()

QString QgsSymbolLayerUtils::encodePenJoinStyle ( Qt::PenJoinStyle style )

static

Definition at line 187 of file qgssymbollayerutils.cpp.

◆ encodePenStyle()

QString QgsSymbolLayerUtils::encodePenStyle ( Qt::PenStyle style )

static

Definition at line 155 of file qgssymbollayerutils.cpp.

◆ encodePoint()

QString QgsSymbolLayerUtils::encodePoint ( QPointF point )

static

Encodes a QPointF to a string.

See also: decodePoint(); encodeSize()

Definition at line 540 of file qgssymbollayerutils.cpp.

◆ encodeRealVector()

QString QgsSymbolLayerUtils::encodeRealVector ( const QVector< qreal > & v )

static

Definition at line 766 of file qgssymbollayerutils.cpp.

◆ encodeScaleMethod()

QString QgsSymbolLayerUtils::encodeScaleMethod ( Qgis::ScaleMethod scaleMethod )

static

Encodes a symbol scale method to a string.

See also: decodeScaleMethod()

Definition at line 824 of file qgssymbollayerutils.cpp.

◆ encodeSize()

QString QgsSymbolLayerUtils::encodeSize ( QSizeF size )

static

Encodes a QSizeF to a string.

See also: decodeSize(); encodePoint()

Definition at line 604 of file qgssymbollayerutils.cpp.

◆ encodeSldAlpha()

QString QgsSymbolLayerUtils::encodeSldAlpha ( int alpha )

static

Definition at line 90 of file qgssymbollayerutils.cpp.

◆ encodeSldBrushStyle()

QString QgsSymbolLayerUtils::encodeSldBrushStyle ( Qt::BrushStyle style )

static

Definition at line 342 of file qgssymbollayerutils.cpp.

◆ encodeSldFontStyle()

QString QgsSymbolLayerUtils::encodeSldFontStyle ( QFont::Style style )

static

Definition at line 106 of file qgssymbollayerutils.cpp.

◆ encodeSldFontWeight()

QString QgsSymbolLayerUtils::encodeSldFontWeight ( int weight )

static

Definition at line 129 of file qgssymbollayerutils.cpp.

◆ encodeSldLineCapStyle()

QString QgsSymbolLayerUtils::encodeSldLineCapStyle ( Qt::PenCapStyle style )

static

Definition at line 260 of file qgssymbollayerutils.cpp.

◆ encodeSldLineJoinStyle()

QString QgsSymbolLayerUtils::encodeSldLineJoinStyle ( Qt::PenJoinStyle style )

static

Definition at line 214 of file qgssymbollayerutils.cpp.

◆ encodeSldRealVector()

QString QgsSymbolLayerUtils::encodeSldRealVector ( const QVector< qreal > & v )

static

Definition at line 795 of file qgssymbollayerutils.cpp.

◆ encodeSldUom()

QString QgsSymbolLayerUtils::encodeSldUom	(	Qgis::RenderUnit	unit,
		double *	scaleFactor
	)

static

Encodes a render unit into an SLD unit of measure string.

Parameters

unit	unit to encode
scaleFactor	if specified, will be set to scale factor for unit of measure

Returns: encoded string

See also: decodeSldUom()

Definition at line 716 of file qgssymbollayerutils.cpp.

◆ estimateMaxSymbolBleed()

double QgsSymbolLayerUtils::estimateMaxSymbolBleed	(	QgsSymbol *	symbol,
		const QgsRenderContext &	context
	)

static

Returns the maximum estimated bleed for the symbol.

Definition at line 940 of file qgssymbollayerutils.cpp.

◆ evaluatePropertiesMap()

QgsStringMap QgsSymbolLayerUtils::evaluatePropertiesMap	(	const QMap< QString, QgsProperty > &	propertiesMap,
		const QgsExpressionContext &	context
	)

static

Evaluates a map of properties using the given context and returns a variant map with evaluated expressions from the properties.

Since: QGIS 3.18

Definition at line 5307 of file qgssymbollayerutils.cpp.

◆ externalGraphicFromSld()

bool QgsSymbolLayerUtils::externalGraphicFromSld	(	QDomElement &	element,
		QString &	path,
		QString &	mime,
		QColor &	color,
		double &	size
	)

static

Definition at line 2602 of file qgssymbollayerutils.cpp.

◆ externalGraphicToSld()

void QgsSymbolLayerUtils::externalGraphicToSld	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	path,
		const QString &	mime,
		const QColor &	color,
		double	size = `-1`
	)

static

Definition at line 2519 of file qgssymbollayerutils.cpp.

◆ externalMarkerFromSld()

bool QgsSymbolLayerUtils::externalMarkerFromSld	(	QDomElement &	element,
		QString &	path,
		QString &	format,
		int &	markIndex,
		QColor &	color,
		double &	size
	)

static

Definition at line 2657 of file qgssymbollayerutils.cpp.

◆ externalMarkerToSld()

void QgsSymbolLayerUtils::externalMarkerToSld	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	path,
		const QString &	format,
		int *	markIndex = `nullptr`,
		const QColor &	color = `QColor()`,
		double	size = `-1`
	)

static

Definition at line 2627 of file qgssymbollayerutils.cpp.

◆ fieldOrExpressionFromExpression()

QString QgsSymbolLayerUtils::fieldOrExpressionFromExpression ( QgsExpression * expression )

static

Returns a field name if the whole expression is just a name of the field .

Returns full expression string if the expression is more complex than just one field. Using just expression->expression() method may return quoted field name, but that is not wanted for saving (due to backward compatibility) or display in GUI.

Definition at line 4774 of file qgssymbollayerutils.cpp.

◆ fieldOrExpressionToExpression()

QgsExpression * QgsSymbolLayerUtils::fieldOrExpressionToExpression ( const QString & fieldOrExpression )

static

Returns a new valid expression instance for given field or expression string.

If the input is not a valid expression, it is assumed that it is a field name and gets properly quoted. If the string is empty, returns nullptr. This is useful when accepting input which could be either a non-quoted field name or expression.

Definition at line 4758 of file qgssymbollayerutils.cpp.

◆ fillFromSld()

bool QgsSymbolLayerUtils::fillFromSld	(	QDomElement &	element,
		Qt::BrushStyle &	brushStyle,
		QColor &	color
	)

static

Definition at line 2250 of file qgssymbollayerutils.cpp.

◆ fillToSld()

void QgsSymbolLayerUtils::fillToSld	(	QDomDocument &	doc,
		QDomElement &	element,
		Qt::BrushStyle	brushStyle,
		const QColor &	color = `QColor()`
	)

static

Definition at line 2199 of file qgssymbollayerutils.cpp.

◆ functionFromSldElement()

bool QgsSymbolLayerUtils::functionFromSldElement	(	QDomElement &	element,
		QString &	function
	)

static

Definition at line 3084 of file qgssymbollayerutils.cpp.

◆ geometryFromSldElement()

bool QgsSymbolLayerUtils::geometryFromSldElement	(	QDomElement &	element,
		QString &	geomFunc
	)

static

Definition at line 3034 of file qgssymbollayerutils.cpp.

◆ getSvgParameterList()

QgsStringMap QgsSymbolLayerUtils::getSvgParameterList ( QDomElement & element )

static

Definition at line 3163 of file qgssymbollayerutils.cpp.

◆ getSvgParametricPath()

QString QgsSymbolLayerUtils::getSvgParametricPath	(	const QString &	basePath,
		const QColor &	fillColor,
		const QColor &	strokeColor,
		double	strokeWidth
	)

static

Encodes a reference to a parametric SVG into a path with parameters according to the SVG Parameters spec.

Definition at line 2567 of file qgssymbollayerutils.cpp.

◆ getVendorOptionList()

QgsStringMap QgsSymbolLayerUtils::getVendorOptionList ( QDomElement & element )

static

Definition at line 3210 of file qgssymbollayerutils.cpp.

◆ hasExternalGraphic()

bool QgsSymbolLayerUtils::hasExternalGraphic ( QDomElement & element )

static

Checks if element contains an ExternalGraphic element with format "image/svg+xml".

Returns: true if the ExternalGraphic with format "image/svg+xml" is found .

Definition at line 1723 of file qgssymbollayerutils.cpp.

◆ hasExternalGraphicV2()

bool QgsSymbolLayerUtils::hasExternalGraphicV2	(	QDomElement &	element,
		const QString	format = `QString()`
	)

static

Checks if element contains an ExternalGraphic element, if the optional format is specified it will also be checked.

Returns: true if the ExternalGraphic element is found and the optionally specified format matches.

Since: QGIS 3.30

Definition at line 1728 of file qgssymbollayerutils.cpp.

◆ hasWellKnownMark()

bool QgsSymbolLayerUtils::hasWellKnownMark ( QDomElement & element )

static

Definition at line 1769 of file qgssymbollayerutils.cpp.

◆ importColorsFromGpl()

QgsNamedColorList QgsSymbolLayerUtils::importColorsFromGpl	(	QFile &	file,
		bool &	ok,
		QString &	name
	)

static

Imports colors from a gpl GIMP palette file.

Parameters

file	source gpl file
ok	will be `true` if file was successfully read
name	will be set to palette name from gpl file, if present

Returns: list of imported colors

See also: saveColorsToGpl

Definition at line 3798 of file qgssymbollayerutils.cpp.

◆ isSharpCorner()

bool QgsSymbolLayerUtils::isSharpCorner	(	QPointF	p1,
		QPointF	p2,
		QPointF	p3
	)

static

Returns true if the angle formed by the line p1 - p2 - p3 forms a "sharp" corner.

Sharp corners form an angle which exceeds a 45 degree threshold.

Since: QGIS 3.16

Definition at line 4737 of file qgssymbollayerutils.cpp.

◆ labelTextToSld()

void QgsSymbolLayerUtils::labelTextToSld	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	label,
		const QFont &	font,
		const QColor &	color = `QColor()`,
		double	size = `-1`
	)

static

Definition at line 2889 of file qgssymbollayerutils.cpp.

◆ lineFromSld()

bool QgsSymbolLayerUtils::lineFromSld	(	QDomElement &	element,
		Qt::PenStyle &	penStyle,
		QColor &	color,
		double &	width,
		Qt::PenJoinStyle *	penJoinStyle = `nullptr`,
		Qt::PenCapStyle *	penCapStyle = `nullptr`,
		QVector< qreal > *	customDashPattern = `nullptr`,
		double *	dashOffset = `nullptr`
	)

static

Definition at line 2388 of file qgssymbollayerutils.cpp.

◆ lineToSld()

void QgsSymbolLayerUtils::lineToSld	(	QDomDocument &	doc,
		QDomElement &	element,
		Qt::PenStyle	penStyle,
		const QColor &	color,
		double	width = `-1`,
		const Qt::PenJoinStyle *	penJoinStyle = `nullptr`,
		const Qt::PenCapStyle *	penCapStyle = `nullptr`,
		const QVector< qreal > *	customDashPattern = `nullptr`,
		double	dashOffset = `0.0`
	)

static

Note: not available in Python bindings

Definition at line 2304 of file qgssymbollayerutils.cpp.

◆ listSvgFiles()

QStringList QgsSymbolLayerUtils::listSvgFiles ( )

static

Returns a list of all available svg files.

Definition at line 4297 of file qgssymbollayerutils.cpp.

◆ listSvgFilesAt()

QStringList QgsSymbolLayerUtils::listSvgFilesAt ( const QString & directory )

static

Returns a list of svg files at the specified directory.

Definition at line 4323 of file qgssymbollayerutils.cpp.

◆ loadColorRamp() [1/2]

QgsColorRamp * QgsSymbolLayerUtils::loadColorRamp ( const QVariant & value )

static

Load a color ramp from a QVariantMap, wrapped in a QVariant.

You can use QgsXmlUtils::readVariant to load it from an XML document.

See also: colorRampToVariant()

Definition at line 3458 of file qgssymbollayerutils.cpp.

◆ loadColorRamp() [2/2]

QgsColorRamp * QgsSymbolLayerUtils::loadColorRamp ( QDomElement & element )

static

Creates a color ramp from the settings encoded in an XML element.

Parameters

element DOM element

Returns: new color ramp. Caller takes responsibility for deleting the returned value.

See also: saveColorRamp()

Definition at line 3404 of file qgssymbollayerutils.cpp.

◆ loadSymbol() [1/2]

QgsSymbol * QgsSymbolLayerUtils::loadSymbol	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

static

Attempts to load a symbol from a DOM element.

Parameters

element	DOM element representing symbol
context	object to transform relative to absolute paths

Returns: decoded symbol, if possible

Definition at line 1229 of file qgssymbollayerutils.cpp.

◆ loadSymbol() [2/2]

template<class SymbolType >

static SymbolType * QgsSymbolLayerUtils::loadSymbol	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

inlinestatic

Attempts to load a symbol from a DOM element and cast it to a particular symbol type.

Parameters

element	DOM element representing symbol
context	object to transform relative to absolute paths

Returns: decoded symbol cast to specified type, if possible

Note: not available in Python bindings

Definition at line 382 of file qgssymbollayerutils.h.

◆ loadSymbolLayer()

QgsSymbolLayer * QgsSymbolLayerUtils::loadSymbolLayer	(	QDomElement &	element,
		const QgsReadWriteContext &	context
	)

static

Reads and returns symbol layer from XML. Caller is responsible for deleting the returned object.

Definition at line 1353 of file qgssymbollayerutils.cpp.

◆ loadSymbols()

QgsSymbolMap QgsSymbolLayerUtils::loadSymbols	(	QDomElement &	element,
		const QgsReadWriteContext &	context
	)

static

Reads a collection of symbols from XML and returns them in a map. Caller is responsible for deleting returned symbols.

Definition at line 3263 of file qgssymbollayerutils.cpp.

◆ mergeScaleDependencies()

void QgsSymbolLayerUtils::mergeScaleDependencies	(	double	mScaleMinDenom,
		double	mScaleMaxDenom,
		QVariantMap &	props
	)

static

Merges the local scale limits, if any, with the ones already in the map, if any.

Definition at line 5058 of file qgssymbollayerutils.cpp.

◆ multiplyImageOpacity()

void QgsSymbolLayerUtils::multiplyImageOpacity	(	QImage *	image,
		qreal	opacity
	)

static

Multiplies opacity of image pixel values with a (global) transparency value.

Definition at line 4101 of file qgssymbollayerutils.cpp.

◆ needEllipseMarker()

bool QgsSymbolLayerUtils::needEllipseMarker ( QDomElement & element )

static

Definition at line 1829 of file qgssymbollayerutils.cpp.

◆ needFontMarker()

bool QgsSymbolLayerUtils::needFontMarker ( QDomElement & element )

static

Definition at line 1784 of file qgssymbollayerutils.cpp.

◆ needLinePatternFill()

bool QgsSymbolLayerUtils::needLinePatternFill ( QDomElement & element )

static

Definition at line 1860 of file qgssymbollayerutils.cpp.

◆ needMarkerLine()

bool QgsSymbolLayerUtils::needMarkerLine ( QDomElement & element )

static

Definition at line 1847 of file qgssymbollayerutils.cpp.

◆ needPointPatternFill()

bool QgsSymbolLayerUtils::needPointPatternFill ( QDomElement & element )

static

Definition at line 1895 of file qgssymbollayerutils.cpp.

◆ needRasterImageFill()

bool QgsSymbolLayerUtils::needRasterImageFill ( QDomElement & element )

static

Checks if element contains a graphic fill with a raster image of type PNG, JPEG or GIF.

Returns: true if element contains a graphic fill with a raster image.

Since: QGIS 3.30

Definition at line 1929 of file qgssymbollayerutils.cpp.

◆ needSvgFill()

bool QgsSymbolLayerUtils::needSvgFill ( QDomElement & element )

static

Definition at line 1916 of file qgssymbollayerutils.cpp.

◆ needSvgMarker()

bool QgsSymbolLayerUtils::needSvgMarker ( QDomElement & element )

static

Definition at line 1824 of file qgssymbollayerutils.cpp.

◆ ogrFeatureStyleBrush()

QString QgsSymbolLayerUtils::ogrFeatureStyleBrush ( const QColor & fillColr )

static

Create ogr feature style string for brush.

Parameters

fillColr fill color

Definition at line 2990 of file qgssymbollayerutils.cpp.

◆ ogrFeatureStylePen()

QString QgsSymbolLayerUtils::ogrFeatureStylePen	(	double	width,
		double	mmScaleFactor,
		double	mapUnitsScaleFactor,
		const QColor &	c,
		Qt::PenJoinStyle	joinStyle = `Qt::MiterJoin`,
		Qt::PenCapStyle	capStyle = `Qt::FlatCap`,
		double	offset = `0.0`,
		const QVector< qreal > *	dashPattern = `nullptr`
	)

static

Create ogr feature style string for pen.

Definition at line 2916 of file qgssymbollayerutils.cpp.

◆ onlineResourceFromSldElement()

bool QgsSymbolLayerUtils::onlineResourceFromSldElement	(	QDomElement &	element,
		QString &	path,
		QString &	format
	)

static

Definition at line 3136 of file qgssymbollayerutils.cpp.

◆ opacityFromSldElement()

bool QgsSymbolLayerUtils::opacityFromSldElement	(	QDomElement &	element,
		QString &	alphaFunc
	)

static

Definition at line 2815 of file qgssymbollayerutils.cpp.

◆ parametricSvgToSld()

void QgsSymbolLayerUtils::parametricSvgToSld	(	QDomDocument &	doc,
		QDomElement &	graphicElem,
		const QString &	path,
		const QColor &	fillColor,
		double	size,
		const QColor &	strokeColor,
		double	strokeWidth
	)

static

Encodes a reference to a parametric SVG into SLD, as a succession of parametric SVG using URL parameters, a fallback SVG without parameters, and a final fallback as a mark with the right colors and stroke for systems that cannot do SVG at all.

Definition at line 2539 of file qgssymbollayerutils.cpp.

◆ parseColor()

QColor QgsSymbolLayerUtils::parseColor	(	const QString &	colorStr,
		bool	strictEval = `false`
	)

static

Attempts to parse a string as a color using a variety of common formats, including hex codes, rgb and rgba strings.

Parameters

colorStr	string representing the color
strictEval	set to `true` for stricter color parsing rules

Returns: parsed color

Definition at line 3881 of file qgssymbollayerutils.cpp.

◆ parseColorList()

QList< QColor > QgsSymbolLayerUtils::parseColorList ( const QString & colorStr )

static

Attempts to parse a string as a list of colors using a variety of common formats, including hex codes, rgb and rgba strings.

Parameters

colorStr string representing the color list

Returns: list of parsed colors

Definition at line 3502 of file qgssymbollayerutils.cpp.

◆ parseColorWithAlpha()

QColor QgsSymbolLayerUtils::parseColorWithAlpha	(	const QString &	colorStr,
		bool &	containsAlpha,
		bool	strictEval = `false`
	)

static

Attempts to parse a string as a color using a variety of common formats, including hex codes, rgb and rgba, hsl and hsla strings.

Parameters

colorStr	string representing the color
containsAlpha	if colorStr contains an explicit alpha value then containsAlpha will be set to `true`
strictEval	set to `true` for stricter color parsing rules

Returns: parsed color

Definition at line 3887 of file qgssymbollayerutils.cpp.

◆ parseProperties()

QVariantMap QgsSymbolLayerUtils::parseProperties ( const QDomElement & element )

static

Parses the properties from XML and returns a map.

Definition at line 3230 of file qgssymbollayerutils.cpp.

◆ pointInPolygon()

bool QgsSymbolLayerUtils::pointInPolygon	(	const QPolygonF &	points,
		QPointF	point
	)

static

Calculate whether a point is within of a QPolygonF.

Definition at line 4610 of file qgssymbollayerutils.cpp.

◆ pointOnLineWithDistance()

QPointF QgsSymbolLayerUtils::pointOnLineWithDistance	(	QPointF	startPoint,
		QPointF	directionPoint,
		double	distance
	)

static

Returns a point on the line from startPoint to directionPoint that is a certain distance away from the starting point.

Definition at line 4287 of file qgssymbollayerutils.cpp.

◆ polygonCentroid()

QPointF QgsSymbolLayerUtils::polygonCentroid ( const QPolygonF & points )

static

Calculate the centroid point of a QPolygonF.

Definition at line 4542 of file qgssymbollayerutils.cpp.

◆ polygonPointOnSurface()

QPointF QgsSymbolLayerUtils::polygonPointOnSurface	(	const QPolygonF &	points,
		const QVector< QPolygonF > *	rings = `nullptr`
	)

static

Calculate a point on the surface of a QPolygonF.

Definition at line 4574 of file qgssymbollayerutils.cpp.

◆ polylineLength()

double QgsSymbolLayerUtils::polylineLength ( const QPolygonF & polyline )

static

Returns the total length of a polyline.

Since: QGIS 3.20

Definition at line 4636 of file qgssymbollayerutils.cpp.

◆ polylineSubstring()

QPolygonF QgsSymbolLayerUtils::polylineSubstring	(	const QPolygonF &	polyline,
		double	startOffset,
		double	endOffset
	)

static

Returns the substring of a polyline which starts at startOffset from the beginning of the line and ends at endOffset from the start of the line.

If startOffset is less than 0, then the start point will be calculated by subtracting that distance from the end of the line. Similarly, if endOffset is less than zero then the end point will be subtracted from the end of the line.

May return an empty linestring if the substring is zero length.

Since: QGIS 3.16

Definition at line 4654 of file qgssymbollayerutils.cpp.

◆ premultiplyColor()

void QgsSymbolLayerUtils::premultiplyColor	(	QColor &	rgb,
		int	alpha
	)

static

Converts a QColor into a premultiplied ARGB QColor value using a specified alpha value.

Definition at line 4207 of file qgssymbollayerutils.cpp.

◆ prettyBreaks()

QList< double > QgsSymbolLayerUtils::prettyBreaks	(	double	minimum,
		double	maximum,
		int	classes
	)

static

Computes a sequence of about 'classes' equally spaced round values which cover the range of values from 'minimum' to 'maximum'.

The values are chosen so that they are 1, 2 or 5 times a power of 10.

Definition at line 4784 of file qgssymbollayerutils.cpp.

◆ rendererFrameRate()

double QgsSymbolLayerUtils::rendererFrameRate ( const QgsFeatureRenderer * renderer )

static

Calculates the frame rate (in frames per second) at which the given renderer must be redrawn.

Returns -1 if the renderer is not animated.

Since: QGIS 3.26

Definition at line 5165 of file qgssymbollayerutils.cpp.

◆ rescaleUom() [1/3]

QVector< qreal > QgsSymbolLayerUtils::rescaleUom	(	const QVector< qreal > &	array,
		Qgis::RenderUnit	unit,
		const QVariantMap &	props
	)

static

Rescales the given array based on the uomScale found in the props, if any is found, otherwise returns a copy of the original point.

Definition at line 5030 of file qgssymbollayerutils.cpp.

◆ rescaleUom() [2/3]

double QgsSymbolLayerUtils::rescaleUom	(	double	size,
		Qgis::RenderUnit	unit,
		const QVariantMap &	props
	)

static

Rescales the given size based on the uomScale found in the props, if any is found, otherwise returns the value un-modified.

Definition at line 4946 of file qgssymbollayerutils.cpp.

◆ rescaleUom() [3/3]

QPointF QgsSymbolLayerUtils::rescaleUom	(	QPointF	point,
		Qgis::RenderUnit	unit,
		const QVariantMap &	props
	)

static

Rescales the given point based on the uomScale found in the props, if any is found, otherwise returns a copy of the original point.

Definition at line 5023 of file qgssymbollayerutils.cpp.

◆ resetSymbolLayerIds() [1/2]

void QgsSymbolLayerUtils::resetSymbolLayerIds ( QgsSymbol * symbol )

static

Regenerate recursively unique id from all symbol symbol layers.

Since: QGIS 3.30

Definition at line 5607 of file qgssymbollayerutils.cpp.

◆ resetSymbolLayerIds() [2/2]

void QgsSymbolLayerUtils::resetSymbolLayerIds ( QgsSymbolLayer * symbolLayer )

static

Regenerate recursively unique id from symbolLayer and its children.

Since: QGIS 3.30

Definition at line 5582 of file qgssymbollayerutils.cpp.

◆ restrictedSizeSymbol()

QgsSymbol * QgsSymbolLayerUtils::restrictedSizeSymbol	(	const QgsSymbol *	s,
		double	minSize,
		double	maxSize,
		QgsRenderContext *	context,
		double &	width,
		double &	height,
		bool *	ok = `nullptr`
	)

static

Creates a new symbol with size restricted to min/max size if original size is out of min/max range.

Parameters

s	the original symbol
minSize	the minimum size in mm
maxSize	the maximum size in mm
context	the render context
width	expected width, can be changed by the function
height	expected height, can be changed by the function
ok	if not nullptr, ok is set to false if it's not possible to compute a restricted symbol (if geometry generators are involved for instance)

Returns: nullptr if size is within minSize/maxSize range or if it's not possible to compute a restricted size symbol. New symbol if size was out of min/max range. Caller takes ownership

Definition at line 5228 of file qgssymbollayerutils.cpp.

◆ rotationFromSldElement()

bool QgsSymbolLayerUtils::rotationFromSldElement	(	QDomElement &	element,
		QString &	rotationFunc
	)

static

Definition at line 2794 of file qgssymbollayerutils.cpp.

◆ saveColorRamp()

QDomElement QgsSymbolLayerUtils::saveColorRamp	(	const QString &	name,
		QgsColorRamp *	ramp,
		QDomDocument &	doc
	)

static

Encodes a color ramp's settings to an XML element.

Parameters

name	name of ramp
ramp	color ramp to save
doc	XML document

Returns: DOM element representing state of color ramp

See also: loadColorRamp()

Definition at line 3429 of file qgssymbollayerutils.cpp.

◆ saveColorsToGpl()

bool QgsSymbolLayerUtils::saveColorsToGpl	(	QFile &	file,
		const QString &	paletteName,
		const QgsNamedColorList &	colors
	)

static

Exports colors to a gpl GIMP palette file.

Parameters

file	destination file
paletteName	name of palette, which is stored in gpl file
colors	colors to export

Returns: true if export was successful

See also: importColorsFromGpl

Definition at line 3763 of file qgssymbollayerutils.cpp.

◆ saveProperties()

void QgsSymbolLayerUtils::saveProperties	(	QVariantMap	props,
		QDomDocument &	doc,
		QDomElement &	element
	)

static

Saves the map of properties to XML.

Definition at line 3258 of file qgssymbollayerutils.cpp.

◆ saveSymbol()

QDomElement QgsSymbolLayerUtils::saveSymbol	(	const QString &	symbolName,
		const QgsSymbol *	symbol,
		QDomDocument &	doc,
		const QgsReadWriteContext &	context
	)

static

Writes a symbol definition to XML.

Definition at line 1433 of file qgssymbollayerutils.cpp.

◆ saveSymbols()

QDomElement QgsSymbolLayerUtils::saveSymbols	(	QgsSymbolMap &	symbols,
		const QString &	tagName,
		QDomDocument &	doc,
		const QgsReadWriteContext &	context
	)

static

Writes a collection of symbols to XML with specified tagName for the top-level element.

Definition at line 3341 of file qgssymbollayerutils.cpp.

◆ sizeInPixelsFromSldUom()

double QgsSymbolLayerUtils::sizeInPixelsFromSldUom	(	const QString &	uom,
		double	size
	)

static

Returns the size scaled in pixels according to the uom attribute.

Parameters

uom	The uom attribute from SLD 1.1 version
size	The original size

Returns: the size in pixels

Definition at line 5081 of file qgssymbollayerutils.cpp.

◆ sortVariantList()

void QgsSymbolLayerUtils::sortVariantList	(	QList< QVariant > &	list,
		Qt::SortOrder	order
	)

static

Sorts the passed list in requested order.

Definition at line 4273 of file qgssymbollayerutils.cpp.

◆ svgSymbolNameToPath()

QString QgsSymbolLayerUtils::svgSymbolNameToPath	(	const QString &	name,
		const QgsPathResolver &	pathResolver
	)

static

Determines an SVG symbol's path from its name.

If name is not an absolute path the file is scanned for in the SVG paths specified in settings svg/searchPathsForSVG.

See also: svgSymbolPathToName()

Definition at line 4350 of file qgssymbollayerutils.cpp.

◆ svgSymbolPathToName()

QString QgsSymbolLayerUtils::svgSymbolPathToName	(	const QString &	path,
		const QgsPathResolver &	pathResolver
	)

static

Determines an SVG symbol's name from its path.

See also: svgSymbolNameToPath()

Definition at line 4416 of file qgssymbollayerutils.cpp.

◆ symbolFromMimeData()

QgsSymbol * QgsSymbolLayerUtils::symbolFromMimeData ( const QMimeData * data )

static

Attempts to parse mime data as a symbol.

A new symbol instance will be returned if the data was successfully converted to a symbol.

See also: symbolToMimeData()

Definition at line 3379 of file qgssymbollayerutils.cpp.

◆ symbolLayerPreviewIcon()

QIcon QgsSymbolLayerUtils::symbolLayerPreviewIcon	(	const QgsSymbolLayer *	layer,
		Qgis::RenderUnit	u,
		QSize	size,
		const QgsMapUnitScale &	scale = `QgsMapUnitScale()`,
		Qgis::SymbolType	parentSymbolType = `Qgis::SymbolType::Hybrid`,
		QgsMapLayer *	mapLayer = `nullptr`,
		const QgsScreenProperties &	screen = `QgsScreenProperties()`
	)

static

Draws a symbol layer preview to an icon.

Parameters

layer	symbol layer to draw
u	size units
size	target size of preview icon
scale	map unit scale for preview
parentSymbolType	since QGIS 3.22, can be used to specify the parent symbol type so that geometry generator preview icons are correctly calculated
mapLayer	since QGIS 3.28, can be used to specify the associated map layer so that layer related expressions are correctly calculated
screen	since QGIS 3.32, can be used to specify the destination screen properties for the icon. This allows the icon to be generated using the correct DPI and device pixel ratio for the target screen.

Returns: icon containing symbol layer preview

See also: symbolLayerPreviewPicture()

Definition at line 989 of file qgssymbollayerutils.cpp.

◆ symbolLayerPreviewPicture()

QPicture QgsSymbolLayerUtils::symbolLayerPreviewPicture	(	const QgsSymbolLayer *	layer,
		Qgis::RenderUnit	units,
		QSize	size,
		const QgsMapUnitScale &	scale = `QgsMapUnitScale()`,
		Qgis::SymbolType	parentSymbolType = `Qgis::SymbolType::Hybrid`
	)

static

Draws a symbol layer preview to a QPicture.

Parameters

layer	symbol layer to draw
units	size units
size	target size of preview picture
scale	map unit scale for preview
parentSymbolType	since QGIS 3.22, can be used to specify the parent symbol type so that geometry generator preview icons are correctly calculated

Returns: QPicture containing symbol layer preview

See also: symbolLayerPreviewIcon()

Definition at line 953 of file qgssymbollayerutils.cpp.

◆ symbolPreviewIcon()

QIcon QgsSymbolLayerUtils::symbolPreviewIcon	(	const QgsSymbol *	symbol,
		QSize	size,
		int	padding = `0`,
		QgsLegendPatchShape *	shape = `nullptr`,
		const QgsScreenProperties &	screen = `QgsScreenProperties()`
	)

static

Returns an icon preview for a color ramp.

Parameters

symbol	symbol
size	target pixmap size
padding	space between icon edge and symbol
shape	optional legend patch shape to use for rendering the preview icon
screen	can be used to specify the destination screen properties for the icon. This allows the icon to be generated using the correct DPI and device pixel ratio for the target screen (since QGIS 3.32)

See also: symbolPreviewPixmap()

Definition at line 873 of file qgssymbollayerutils.cpp.

◆ symbolPreviewPixmap()

QPixmap QgsSymbolLayerUtils::symbolPreviewPixmap	(	const QgsSymbol *	symbol,
		QSize	size,
		int	padding = `0`,
		QgsRenderContext *	customContext = `nullptr`,
		bool	selected = `false`,
		const QgsExpressionContext *	expressionContext = `nullptr`,
		const QgsLegendPatchShape *	shape = `nullptr`,
		const QgsScreenProperties &	screen = `QgsScreenProperties()`
	)

static

Returns a pixmap preview for a color ramp.

Parameters

symbol	symbol
size	target pixmap size
padding	space between icon edge and symbol
customContext	custom rendering context
selected	set to `true` to render the symbol in a selected state (since QGIS 3.10)
expressionContext	optional custom expression context (since QGIS 3.10)
shape	optional legend patch shape to use for rendering the preview icon (since QGIS 3.14)
screen	can be used to specify the destination screen properties for the icon. This allows the icon to be generated using the correct DPI and device pixel ratio for the target screen (since QGIS 3.32)

See also: symbolPreviewIcon()

Definition at line 878 of file qgssymbollayerutils.cpp.

◆ symbolProperties()

QString QgsSymbolLayerUtils::symbolProperties ( QgsSymbol * symbol )

static

Returns a string representing the symbol.

Can be used to test for equality between symbols.

Definition at line 1496 of file qgssymbollayerutils.cpp.

◆ symbolToMimeData()

QMimeData * QgsSymbolLayerUtils::symbolToMimeData ( const QgsSymbol * symbol )

static

Creates new mime data from a symbol.

This also sets the mime color data to match the symbol's color, so that copied symbols can be paste in places where a color is expected.

See also: symbolFromMimeData()

Definition at line 3361 of file qgssymbollayerutils.cpp.

◆ tileSize()

QSize QgsSymbolLayerUtils::tileSize	(	int	width,
		int	height,
		double &	angleRad
	)

static

Calculate the minimum size in pixels of a symbol tile given the symbol width and height and the symbol layer rotation angleRad in radians (counter clockwise).

The method makes approximations and can modify angle in order to generate the smallest possible tile.

Parameters

width	marker width, including margins
height	marker height, including margins
angleRad	symbol layer rotation angle in radians (counter clockwise), it may be approximated by the method to minimize the tile size.

Returns: the size of the tile

Since: QGIS 3.30

Definition at line 5318 of file qgssymbollayerutils.cpp.

◆ toPoint()

QPointF QgsSymbolLayerUtils::toPoint	(	const QVariant &	value,
		bool *	ok = `nullptr`
	)

static

Converts a value to a point.

Parameters

value	value to convert
ok	if specified, will be set to `true` if value was successfully converted

Returns: converted point

See also: decodePoint(); toSize()

Since: QGIS 3.10

Definition at line 553 of file qgssymbollayerutils.cpp.

◆ toQPolygonF()

QList< QList< QPolygonF > > QgsSymbolLayerUtils::toQPolygonF	(	const QgsGeometry &	geometry,
		Qgis::SymbolType	type
	)

static

Converts a geometry to a set of QPolygonF objects representing how the geometry should be drawn for a symbol of the given type, as a list of geometry parts and rings.

Since: QGIS 3.40

Definition at line 4477 of file qgssymbollayerutils.cpp.

◆ toSize()

QSizeF QgsSymbolLayerUtils::toSize	(	const QVariant &	value,
		bool *	ok = `nullptr`
	)

static

Converts a value to a size.

Parameters

value	value to convert
ok	if specified, will be set to `true` if value was successfully converted

Returns: converted size

See also: decodeSize(); toPoint()

Since: QGIS 3.10

Definition at line 617 of file qgssymbollayerutils.cpp.

◆ toSymbolLayerPointers()

QSet< const QgsSymbolLayer * > QgsSymbolLayerUtils::toSymbolLayerPointers	(	const QgsFeatureRenderer *	renderer,
		const QSet< QgsSymbolLayerId > &	symbolLayerIds
	)

static

Converts a set of symbol layer id to a set of pointers to actual symbol layers carried by the feature renderer.

Since: QGIS 3.12

Deprecated:: QGIS 3.30. Because it was related to old QgsSymbolLayerReference system.

Definition at line 5101 of file qgssymbollayerutils.cpp.

◆ wellKnownMarkerFromSld()

bool QgsSymbolLayerUtils::wellKnownMarkerFromSld	(	QDomElement &	element,
		QString &	name,
		QColor &	color,
		QColor &	strokeColor,
		Qt::PenStyle &	strokeStyle,
		double &	strokeWidth,
		double &	size
	)

static

Note: available in Python as wellKnownMarkerFromSld2

Definition at line 2737 of file qgssymbollayerutils.cpp.

◆ wellKnownMarkerToSld()

void QgsSymbolLayerUtils::wellKnownMarkerToSld	(	QDomDocument &	doc,
		QDomElement &	element,
		const QString &	name,
		const QColor &	color,
		const QColor &	strokeColor,
		Qt::PenStyle	strokeStyle,
		double	strokeWidth = `-1`,
		double	size = `-1`
	)

static

Definition at line 2701 of file qgssymbollayerutils.cpp.

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

/build/qgis-3.41.0+git20241116+25ec5511245+99sid/src/core/symbology/qgssymbollayerutils.h
/build/qgis-3.41.0+git20241116+25ec5511245+99sid/src/core/symbology/qgssymbollayerutils.cpp

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ appendPolyline()

◆ applyScaleDependency()

◆ blurImageInPlace()

◆ clearSymbolLayerIds() [1/2]

◆ clearSymbolLayerIds() [2/2]

◆ clearSymbolMap()

◆ collectSymbolLayerClipGeometries()

◆ colorFromMimeData()

◆ colorListFromMimeData()

◆ colorListToMimeData()

◆ colorRampPreviewIcon()

◆ colorRampPreviewPixmap()

◆ colorRampToVariant()

◆ colorToMimeData()

◆ colorToName()

◆ condenseFillAndOutline()

◆ convertPolygonSymbolizerToPointMarker()

◆ createAnchorPointElement()

◆ createDisplacementElement()

◆ createExpressionElement()

◆ createFillLayerFromSld()

◆ createFunctionElement()

◆ createGeometryElement()

◆ createLineLayerFromSld()

◆ createMarkerLayerFromSld()

◆ createOnlineResourceElement()

◆ createOpacityElement()

◆ createRotationElement()

◆ createSvgParameterElement()

◆ createSymbolLayerListFromSld()

◆ createVendorOptionElement()

◆ decodeArrowHeadType()

◆ decodeArrowType()

◆ decodeBlendMode()

◆ decodeBrushStyle()

◆ decodeColor()

◆ decodeCoordinateReference()

◆ decodeLineClipMode()

◆ decodeMapUnitScale()

◆ decodeMarkerClipMode()

◆ decodePenCapStyle()

◆ decodePenJoinStyle()

◆ decodePenStyle()

◆ decodePoint()

◆ decodeRealVector()

◆ decodeScaleMethod()

◆ decodeSize()

◆ decodeSldAlpha()

◆ decodeSldBrushStyle()

◆ decodeSldFontStyle()

◆ decodeSldFontWeight()

◆ decodeSldLineCapStyle()

◆ decodeSldLineJoinStyle()

◆ decodeSldRealVector()

◆ decodeSldUom()

◆ displacementFromSldElement()

◆ drawStippledBackground()

◆ drawVertexMarker()

◆ encodeBrushStyle()

◆ encodeColor()

◆ encodeCoordinateReference()

◆ encodeLineClipMode()

◆ encodeMapUnitScale()

◆ encodeMarkerClipMode()

◆ encodePenCapStyle()

◆ encodePenJoinStyle()

◆ encodePenStyle()

◆ encodePoint()

◆ encodeRealVector()

◆ encodeScaleMethod()

◆ encodeSize()

◆ encodeSldAlpha()

◆ encodeSldBrushStyle()

◆ encodeSldFontStyle()

◆ encodeSldFontWeight()

◆ encodeSldLineCapStyle()

◆ encodeSldLineJoinStyle()