QGIS API Documentation  3.23.0-Master (7c4a6de034)
Static Public Member Functions | List of all members
QgsSymbolLayerUtils Class Reference

#include <qgssymbollayerutils.h>

Static Public Member Functions

static void appendPolyline (QPolygonF &target, const QPolygonF &line)
 Appends a polyline line to an existing target polyline. More...
 
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. More...
 
static void blurImageInPlace (QImage &image, QRect rect, int radius, bool alphaOnly)
 Blurs an image in place, e.g. creating Qt-independent drop shadows. More...
 
static void clearSymbolMap (QgsSymbolMap &symbols)
 
static QColor colorFromMimeData (const QMimeData *data, bool &hasAlpha)
 Attempts to parse mime data as a color. More...
 
static QgsNamedColorList colorListFromMimeData (const QMimeData *data)
 Attempts to parse mime data as a list of named colors. More...
 
static QMimeData * colorListToMimeData (const QgsNamedColorList &colorList, bool allFormats=true)
 Creates mime data from a list of named colors. More...
 
static QIcon colorRampPreviewIcon (QgsColorRamp *ramp, QSize size, int padding=0)
 Returns an icon preview for a color ramp. More...
 
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. More...
 
static QVariant colorRampToVariant (const QString &name, QgsColorRamp *ramp)
 Saves a color ramp to a QVariantMap, wrapped in a QVariant. More...
 
static QMimeData * colorToMimeData (const QColor &color)
 Creates mime data from a color. More...
 
static QString colorToName (const QColor &color)
 Returns a friendly display name for a color. More...
 
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. More...
 
static bool convertPolygonSymbolizerToPointMarker (QDomElement &element, QList< QgsSymbolLayer * > &layerList)
 Converts a polygon symbolizer element to a list of marker symbol layers. More...
 
static void createAnchorPointElement (QDomDocument &doc, QDomElement &element, QPointF anchor)
 Creates a SE 1.1 anchor point element as a child of the specified element. More...
 
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. More...
 
static QgsSymbolLayercreateFillLayerFromSld (QDomElement &element)
 
static bool createFunctionElement (QDomDocument &doc, QDomElement &element, const QString &function)
 
static void createGeometryElement (QDomDocument &doc, QDomElement &element, const QString &geomFunc)
 
static QgsSymbolLayercreateLineLayerFromSld (QDomElement &element)
 
static QgsSymbolLayercreateMarkerLayerFromSld (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, QgsWkbTypes::GeometryType geomType, QList< QgsSymbolLayer * > &layers)
 Creates a symbol layer list from a DOM element. More...
 
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. More...
 
static QgsArrowSymbolLayer::ArrowType decodeArrowType (const QVariant &value, bool *ok=nullptr)
 Decodes a value representing an arrow type. More...
 
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. More...
 
static Qgis::LineClipMode decodeLineClipMode (const QString &string, bool *ok=nullptr)
 Decodes a string representing a line clip mode. More...
 
static QgsMapUnitScale decodeMapUnitScale (const QString &str)
 
static Qgis::MarkerClipMode decodeMarkerClipMode (const QString &string, bool *ok=nullptr)
 Decodes a string representing a marker clip mode. More...
 
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. More...
 
static QVector< qreal > decodeRealVector (const QString &s)
 
static Qgis::ScaleMethod decodeScaleMethod (const QString &str)
 Decodes a symbol scale method from a string. More...
 
static QSizeF decodeSize (const QString &string)
 Decodes a QSizeF from a string. More...
 
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 QgsUnitTypes::RenderUnit decodeSldUom (const QString &str, double *scaleFactor=nullptr)
 Decodes a SLD unit of measure string to a render unit. More...
 
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. More...
 
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. More...
 
static QString encodeLineClipMode (Qgis::LineClipMode mode)
 Encodes a line clip mode to a string. More...
 
static QString encodeMapUnitScale (const QgsMapUnitScale &mapUnitScale)
 
static QString encodeMarkerClipMode (Qgis::MarkerClipMode mode)
 Encodes a marker clip mode to a string. More...
 
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. More...
 
static QString encodeRealVector (const QVector< qreal > &v)
 
static QString encodeScaleMethod (Qgis::ScaleMethod scaleMethod)
 Encodes a symbol scale method to a string. More...
 
static QString encodeSize (QSizeF size)
 Encodes a QSizeF to a string. More...
 
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 (QgsUnitTypes::RenderUnit unit, double *scaleFactor)
 Encodes a render unit into an SLD unit of measure string. More...
 
static double estimateMaxSymbolBleed (QgsSymbol *symbol, const QgsRenderContext &context)
 Returns the maximum estimated bleed for the symbol. More...
 
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. More...
 
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 . More...
 
static QgsExpressionfieldOrExpressionToExpression (const QString &fieldOrExpression)
 Returns a new valid expression instance for given field or expression string. More...
 
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. More...
 
static QgsStringMap getVendorOptionList (QDomElement &element)
 
static bool hasExternalGraphic (QDomElement &element)
 
static bool hasWellKnownMark (QDomElement &element)
 
static QgsNamedColorList importColorsFromGpl (QFile &file, bool &ok, QString &name)
 Imports colors from a gpl GIMP palette file. More...
 
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. More...
 
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. More...
 
static QStringList listSvgFilesAt (const QString &directory)
 Returns a list of svg files at the specified directory. More...
 
static QgsColorRamploadColorRamp (const QVariant &value)
 Load a color ramp from a QVariantMap, wrapped in a QVariant. More...
 
static QgsColorRamploadColorRamp (QDomElement &element)
 Creates a color ramp from the settings encoded in an XML element. More...
 
static QgsSymbolloadSymbol (const QDomElement &element, const QgsReadWriteContext &context)
 Attempts to load a symbol from a DOM element. More...
 
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. More...
 
static QgsSymbolLayerloadSymbolLayer (QDomElement &element, const QgsReadWriteContext &context)
 Reads and returns symbol layer from XML. Caller is responsible for deleting the returned object. More...
 
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. More...
 
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. More...
 
static void multiplyImageOpacity (QImage *image, qreal opacity)
 Multiplies opacity of image pixel values with a (global) transparency value. More...
 
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 needSvgFill (QDomElement &element)
 
static bool needSvgMarker (QDomElement &element)
 
static QString ogrFeatureStyleBrush (const QColor &fillColr)
 Create ogr feature style string for brush. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
static QVariantMap parseProperties (const QDomElement &element)
 Parses the properties from XML and returns a map. More...
 
static bool pointInPolygon (const QPolygonF &points, QPointF point)
 Calculate whether a point is within of a QPolygonF. More...
 
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. More...
 
static QPointF polygonCentroid (const QPolygonF &points)
 Calculate the centroid point of a QPolygonF. More...
 
static QPointF polygonPointOnSurface (const QPolygonF &points, const QVector< QPolygonF > *rings=nullptr)
 Calculate a point on the surface of a QPolygonF. More...
 
static double polylineLength (const QPolygonF &polyline)
 Returns the total length of a polyline. More...
 
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. More...
 
static void premultiplyColor (QColor &rgb, int alpha)
 Converts a QColor into a premultiplied ARGB QColor value using a specified alpha value. More...
 
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'. More...
 
static QVector< qreal > rescaleUom (const QVector< qreal > &array, QgsUnitTypes::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. More...
 
static double rescaleUom (double size, QgsUnitTypes::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. More...
 
static QPointF rescaleUom (QPointF point, QgsUnitTypes::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. More...
 
static QgsSymbolrestrictedSizeSymbol (const QgsSymbol *s, double minSize, double maxSize, QgsRenderContext *context, double &width, double &height)
 Creates a new symbol with size restricted to min/max size if original size is out of min/max range. More...
 
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. More...
 
static bool saveColorsToGpl (QFile &file, const QString &paletteName, const QgsNamedColorList &colors)
 Exports colors to a gpl GIMP palette file. More...
 
static void saveProperties (QVariantMap props, QDomDocument &doc, QDomElement &element)
 Saves the map of properties to XML. More...
 
static QDomElement saveSymbol (const QString &symbolName, const QgsSymbol *symbol, QDomDocument &doc, const QgsReadWriteContext &context)
 Writes a symbol definition to XML. More...
 
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. More...
 
static double sizeInPixelsFromSldUom (const QString &uom, double size)
 Returns the size scaled in pixels according to the uom attribute. More...
 
static void sortVariantList (QList< QVariant > &list, Qt::SortOrder order)
 Sorts the passed list in requested order. More...
 
static QString svgSymbolNameToPath (const QString &name, const QgsPathResolver &pathResolver)
 Determines an SVG symbol's path from its name. More...
 
static QString svgSymbolPathToName (const QString &path, const QgsPathResolver &pathResolver)
 Determines an SVG symbol's name from its path. More...
 
static QgsSymbolsymbolFromMimeData (const QMimeData *data)
 Attempts to parse mime data as a symbol. More...
 
static QIcon symbolLayerPreviewIcon (const QgsSymbolLayer *layer, QgsUnitTypes::RenderUnit u, QSize size, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::SymbolType parentSymbolType=Qgis::SymbolType::Hybrid)
 Draws a symbol layer preview to an icon. More...
 
static QPicture symbolLayerPreviewPicture (const QgsSymbolLayer *layer, QgsUnitTypes::RenderUnit units, QSize size, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::SymbolType parentSymbolType=Qgis::SymbolType::Hybrid)
 Draws a symbol layer preview to a QPicture. More...
 
static QIcon symbolPreviewIcon (const QgsSymbol *symbol, QSize size, int padding=0, QgsLegendPatchShape *shape=nullptr)
 Returns an icon preview for a color ramp. More...
 
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)
 Returns a pixmap preview for a color ramp. More...
 
static QString symbolProperties (QgsSymbol *symbol)
 Returns a string representing the symbol. More...
 
static QMimeData * symbolToMimeData (const QgsSymbol *symbol)
 Creates new mime data from a symbol. More...
 
static QPointF toPoint (const QVariant &value, bool *ok=nullptr)
 Converts a value to a point. More...
 
static QSizeF toSize (const QVariant &value, bool *ok=nullptr)
 Converts a value to a size. More...
 
static QSet< const QgsSymbolLayer * > toSymbolLayerPointers (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. More...
 
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

Definition at line 57 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 4534 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.

Since
QGIS 3.0

Definition at line 4829 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 4010 of file qgssymbollayerutils.cpp.

◆ clearSymbolMap()

void QgsSymbolLayerUtils::clearSymbolMap ( QgsSymbolMap symbols)
static

Definition at line 3273 of file qgssymbollayerutils.cpp.

◆ colorFromMimeData()

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

Attempts to parse mime data as a color.

Parameters
datamime data to parse
hasAlphawill 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
Since
QGIS 2.5

Definition at line 3499 of file qgssymbollayerutils.cpp.

◆ colorListFromMimeData()

QgsNamedColorList QgsSymbolLayerUtils::colorListFromMimeData ( const QMimeData *  data)
static

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

Parameters
datamime data to parse
Returns
list of parsed colors
Since
QGIS 2.5

Definition at line 3527 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
colorListlist of named colors
allFormatsset to true to include additional mime formats, include text/plain and application/x-color
Returns
mime data containing encoded colors
Since
QGIS 2.5

Definition at line 3640 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
rampcolor ramp
sizetarget icon size
paddingspace between icon edge and color ramp
See also
colorRampPreviewPixmap()

Definition at line 1019 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
rampcolor ramp
sizetarget pixmap size
paddingspace between icon edge and color ramp
directiondirection to render pixmap (since QGIS 3.18)
flipDirectionset 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.
drawTransparentBackgroundset to false to disable the checkerboard effect drawn below transparent colors in the ramp
See also
colorRampPreviewIcon()

Definition at line 1024 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 3357 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
colorcolor to encode as mime data
See also
colorFromMimeData
Since
QGIS 2.5

Definition at line 3489 of file qgssymbollayerutils.cpp.

◆ colorToName()

QString QgsSymbolLayerUtils::colorToName ( const QColor &  color)
static

Returns a friendly display name for a color.

Parameters
colorsource color
Returns
display name for color
Since
QGIS 2.5

Definition at line 3408 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 4107 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 1858 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
docThe document
elementThe parent element
anchorAn anchor specification, with values between 0 and 1

Definition at line 2758 of file qgssymbollayerutils.cpp.

◆ createDisplacementElement()

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

Definition at line 2740 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
docThe document owning the element
elementThe element parent
functionThe expression to be encoded

Definition at line 2958 of file qgssymbollayerutils.cpp.

◆ createFillLayerFromSld()

QgsSymbolLayer * QgsSymbolLayerUtils::createFillLayerFromSld ( QDomElement &  element)
static

Definition at line 1606 of file qgssymbollayerutils.cpp.

◆ createFunctionElement()

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

Definition at line 2974 of file qgssymbollayerutils.cpp.

◆ createGeometryElement()

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

Definition at line 2915 of file qgssymbollayerutils.cpp.

◆ createLineLayerFromSld()

QgsSymbolLayer * QgsSymbolLayerUtils::createLineLayerFromSld ( QDomElement &  element)
static

Definition at line 1629 of file qgssymbollayerutils.cpp.

◆ createMarkerLayerFromSld()

QgsSymbolLayer * QgsSymbolLayerUtils::createMarkerLayerFromSld ( QDomElement &  element)
static

Definition at line 1648 of file qgssymbollayerutils.cpp.

◆ createOnlineResourceElement()

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

Definition at line 3026 of file qgssymbollayerutils.cpp.

◆ createOpacityElement()

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

Definition at line 2720 of file qgssymbollayerutils.cpp.

◆ createRotationElement()

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

Definition at line 2699 of file qgssymbollayerutils.cpp.

◆ createSvgParameterElement()

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

Definition at line 3060 of file qgssymbollayerutils.cpp.

◆ createSymbolLayerListFromSld()

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

Creates a symbol layer list from a DOM element.

Definition at line 1456 of file qgssymbollayerutils.cpp.

◆ createVendorOptionElement()

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

Definition at line 3107 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 419 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 444 of file qgssymbollayerutils.cpp.

◆ decodeBlendMode()

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

Definition at line 852 of file qgssymbollayerutils.cpp.

◆ decodeBrushStyle()

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

Definition at line 319 of file qgssymbollayerutils.cpp.

◆ decodeColor()

QColor QgsSymbolLayerUtils::decodeColor ( const QString &  str)
static

Definition at line 68 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
stringstring to decode
okwill be set to true if string was successfully decoded
Returns
decoded marker clip mode
See also
encodeCoordinateReference()
Since
QGIS 3.24

Definition at line 391 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
stringstring to decode
okwill be set to true if string was successfully decoded
Returns
decoded line clip mode
See also
encodeLineClipMode()
Since
QGIS 3.24

Definition at line 505 of file qgssymbollayerutils.cpp.

◆ decodeMapUnitScale()

QgsMapUnitScale QgsSymbolLayerUtils::decodeMapUnitScale ( const QString &  str)
static

Definition at line 675 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
stringstring to decode
okwill be set to true if string was successfully decoded
Returns
decoded marker clip mode
See also
encodeMarkerClipMode()
Since
QGIS 3.24

Definition at line 469 of file qgssymbollayerutils.cpp.

◆ decodePenCapStyle()

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

Definition at line 249 of file qgssymbollayerutils.cpp.

◆ decodePenJoinStyle()

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

Definition at line 199 of file qgssymbollayerutils.cpp.

◆ decodePenStyle()

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

Definition at line 173 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 542 of file qgssymbollayerutils.cpp.

◆ decodeRealVector()

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

Definition at line 777 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 836 of file qgssymbollayerutils.cpp.

◆ decodeSize()

QSizeF QgsSymbolLayerUtils::decodeSize ( const QString &  string)
static

Decodes a QSizeF from a string.

See also
encodeSize()
decodePoint()
Since
QGIS 3.0

Definition at line 606 of file qgssymbollayerutils.cpp.

◆ decodeSldAlpha()

int QgsSymbolLayerUtils::decodeSldAlpha ( const QString &  str)
static

Definition at line 92 of file qgssymbollayerutils.cpp.

◆ decodeSldBrushStyle()

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

Definition at line 376 of file qgssymbollayerutils.cpp.

◆ decodeSldFontStyle()

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

Definition at line 118 of file qgssymbollayerutils.cpp.

◆ decodeSldFontWeight()

int QgsSymbolLayerUtils::decodeSldFontWeight ( const QString &  str)
static

Definition at line 138 of file qgssymbollayerutils.cpp.

◆ decodeSldLineCapStyle()

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

Definition at line 272 of file qgssymbollayerutils.cpp.

◆ decodeSldLineJoinStyle()

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

Definition at line 226 of file qgssymbollayerutils.cpp.

◆ decodeSldRealVector()

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

Definition at line 806 of file qgssymbollayerutils.cpp.

◆ decodeSldUom()

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

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

Parameters
strstring to decode
scaleFactorif specified, will be set to scale factor for unit of measure
Returns
matching render unit
See also
encodeSldUom()

Definition at line 734 of file qgssymbollayerutils.cpp.

◆ displacementFromSldElement()

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

Definition at line 2775 of file qgssymbollayerutils.cpp.

◆ drawStippledBackground()

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

Definition at line 1069 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 1088 of file qgssymbollayerutils.cpp.

◆ encodeBrushStyle()

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

Definition at line 280 of file qgssymbollayerutils.cpp.

◆ encodeColor()

QString QgsSymbolLayerUtils::encodeColor ( const QColor &  color)
static

Definition at line 63 of file qgssymbollayerutils.cpp.

◆ encodeCoordinateReference()

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

Encodes a symbol coordinate reference mode to a string.

Parameters
coordinateReferencecoordinate reference mode
See also
decodeCoordinateReference()
Since
QGIS 3.24

Definition at line 407 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 523 of file qgssymbollayerutils.cpp.

◆ encodeMapUnitScale()

QString QgsSymbolLayerUtils::encodeMapUnitScale ( const QgsMapUnitScale mapUnitScale)
static

Definition at line 665 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 489 of file qgssymbollayerutils.cpp.

◆ encodePenCapStyle()

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

Definition at line 234 of file qgssymbollayerutils.cpp.

◆ encodePenJoinStyle()

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

Definition at line 184 of file qgssymbollayerutils.cpp.

◆ encodePenStyle()

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

Definition at line 152 of file qgssymbollayerutils.cpp.

◆ encodePoint()

QString QgsSymbolLayerUtils::encodePoint ( QPointF  point)
static

Encodes a QPointF to a string.

See also
decodePoint()
encodeSize()

Definition at line 537 of file qgssymbollayerutils.cpp.

◆ encodeRealVector()

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

Definition at line 762 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 820 of file qgssymbollayerutils.cpp.

◆ encodeSize()

QString QgsSymbolLayerUtils::encodeSize ( QSizeF  size)
static

Encodes a QSizeF to a string.

See also
decodeSize()
encodePoint()
Since
QGIS 3.0

Definition at line 601 of file qgssymbollayerutils.cpp.

◆ encodeSldAlpha()

QString QgsSymbolLayerUtils::encodeSldAlpha ( int  alpha)
static

Definition at line 87 of file qgssymbollayerutils.cpp.

◆ encodeSldBrushStyle()

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

Definition at line 339 of file qgssymbollayerutils.cpp.

◆ encodeSldFontStyle()

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

Definition at line 103 of file qgssymbollayerutils.cpp.

◆ encodeSldFontWeight()

QString QgsSymbolLayerUtils::encodeSldFontWeight ( int  weight)
static

Definition at line 126 of file qgssymbollayerutils.cpp.

◆ encodeSldLineCapStyle()

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

Definition at line 257 of file qgssymbollayerutils.cpp.

◆ encodeSldLineJoinStyle()

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

Definition at line 211 of file qgssymbollayerutils.cpp.

◆ encodeSldRealVector()

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

Definition at line 791 of file qgssymbollayerutils.cpp.

◆ encodeSldUom()

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

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

Parameters
unitunit to encode
scaleFactorif specified, will be set to scale factor for unit of measure
Returns
encoded string
See also
decodeSldUom()

Definition at line 713 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 932 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 5007 of file qgssymbollayerutils.cpp.

◆ externalGraphicFromSld()

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

Definition at line 2517 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 2434 of file qgssymbollayerutils.cpp.

◆ externalMarkerFromSld()

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

Definition at line 2572 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 2542 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.

Since
QGIS 2.2

Definition at line 4562 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.

Since
QGIS 2.2

Definition at line 4546 of file qgssymbollayerutils.cpp.

◆ fillFromSld()

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

Definition at line 2165 of file qgssymbollayerutils.cpp.

◆ fillToSld()

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

Definition at line 2114 of file qgssymbollayerutils.cpp.

◆ functionFromSldElement()

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

Definition at line 2989 of file qgssymbollayerutils.cpp.

◆ geometryFromSldElement()

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

Definition at line 2949 of file qgssymbollayerutils.cpp.

◆ getSvgParameterList()

QgsStringMap QgsSymbolLayerUtils::getSvgParameterList ( QDomElement &  element)
static

Definition at line 3068 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.

Since
QGIS 3.0

Definition at line 2482 of file qgssymbollayerutils.cpp.

◆ getVendorOptionList()

QgsStringMap QgsSymbolLayerUtils::getVendorOptionList ( QDomElement &  element)
static

Definition at line 3115 of file qgssymbollayerutils.cpp.

◆ hasExternalGraphic()

bool QgsSymbolLayerUtils::hasExternalGraphic ( QDomElement &  element)
static

Definition at line 1671 of file qgssymbollayerutils.cpp.

◆ hasWellKnownMark()

bool QgsSymbolLayerUtils::hasWellKnownMark ( QDomElement &  element)
static

Definition at line 1712 of file qgssymbollayerutils.cpp.

◆ importColorsFromGpl()

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

Imports colors from a gpl GIMP palette file.

Parameters
filesource gpl file
okwill be true if file was successfully read
namewill be set to palette name from gpl file, if present
Returns
list of imported colors
See also
saveColorsToGpl

Definition at line 3737 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 4525 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 2804 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 2303 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 2219 of file qgssymbollayerutils.cpp.

◆ listSvgFiles()

QStringList QgsSymbolLayerUtils::listSvgFiles ( )
static

Returns a list of all available svg files.

Definition at line 4176 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 4202 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 3376 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
elementDOM element
Returns
new color ramp. Caller takes responsibility for deleting the returned value.
See also
saveColorRamp()

Definition at line 3322 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
elementDOM element representing symbol
contextobject to transform relative to absolute paths
Returns
decoded symbol, if possible

Definition at line 1212 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
elementDOM element representing symbol
contextobject 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 1319 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 3181 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.

Since
QGIS 3.0

Definition at line 4846 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 3980 of file qgssymbollayerutils.cpp.

◆ needEllipseMarker()

bool QgsSymbolLayerUtils::needEllipseMarker ( QDomElement &  element)
static

Definition at line 1772 of file qgssymbollayerutils.cpp.

◆ needFontMarker()

bool QgsSymbolLayerUtils::needFontMarker ( QDomElement &  element)
static

Definition at line 1727 of file qgssymbollayerutils.cpp.

◆ needLinePatternFill()

bool QgsSymbolLayerUtils::needLinePatternFill ( QDomElement &  element)
static

Definition at line 1803 of file qgssymbollayerutils.cpp.

◆ needMarkerLine()

bool QgsSymbolLayerUtils::needMarkerLine ( QDomElement &  element)
static

Definition at line 1790 of file qgssymbollayerutils.cpp.

◆ needPointPatternFill()

bool QgsSymbolLayerUtils::needPointPatternFill ( QDomElement &  element)
static

Definition at line 1838 of file qgssymbollayerutils.cpp.

◆ needSvgFill()

bool QgsSymbolLayerUtils::needSvgFill ( QDomElement &  element)
static

Definition at line 1844 of file qgssymbollayerutils.cpp.

◆ needSvgMarker()

bool QgsSymbolLayerUtils::needSvgMarker ( QDomElement &  element)
static

Definition at line 1767 of file qgssymbollayerutils.cpp.

◆ ogrFeatureStyleBrush()

QString QgsSymbolLayerUtils::ogrFeatureStyleBrush ( const QColor &  fillColr)
static

Create ogr feature style string for brush.

Parameters
fillColrfill color

Definition at line 2905 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 2831 of file qgssymbollayerutils.cpp.

◆ onlineResourceFromSldElement()

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

Definition at line 3041 of file qgssymbollayerutils.cpp.

◆ opacityFromSldElement()

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

Definition at line 2730 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.

Since
QGIS 3.0

Definition at line 2454 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
colorStrstring representing the color
strictEvalset to true for stricter color parsing rules
Returns
parsed color
Since
QGIS 2.3

Definition at line 3820 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
colorStrstring representing the color list
Returns
list of parsed colors
Since
QGIS 2.5

Definition at line 3420 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
colorStrstring representing the color
containsAlphaif colorStr contains an explicit alpha value then containsAlpha will be set to true
strictEvalset to true for stricter color parsing rules
Returns
parsed color
Since
QGIS 2.3

Definition at line 3826 of file qgssymbollayerutils.cpp.

◆ parseProperties()

QVariantMap QgsSymbolLayerUtils::parseProperties ( const QDomElement &  element)
static

Parses the properties from XML and returns a map.

Definition at line 3135 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 4398 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 4166 of file qgssymbollayerutils.cpp.

◆ polygonCentroid()

QPointF QgsSymbolLayerUtils::polygonCentroid ( const QPolygonF &  points)
static

Calculate the centroid point of a QPolygonF.

Definition at line 4330 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 4362 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 4424 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 4442 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.

Since
QGIS 2.3

Definition at line 4086 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.

Since
QGIS 2.10

Definition at line 4572 of file qgssymbollayerutils.cpp.

◆ rescaleUom() [1/3]

QVector< qreal > QgsSymbolLayerUtils::rescaleUom ( const QVector< qreal > &  array,
QgsUnitTypes::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.

Since
QGIS 3.0

Definition at line 4818 of file qgssymbollayerutils.cpp.

◆ rescaleUom() [2/3]

double QgsSymbolLayerUtils::rescaleUom ( double  size,
QgsUnitTypes::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.

Since
QGIS 3.0

Definition at line 4734 of file qgssymbollayerutils.cpp.

◆ rescaleUom() [3/3]

QPointF QgsSymbolLayerUtils::rescaleUom ( QPointF  point,
QgsUnitTypes::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.

Since
QGIS 3.0

Definition at line 4811 of file qgssymbollayerutils.cpp.

◆ restrictedSizeSymbol()

QgsSymbol * QgsSymbolLayerUtils::restrictedSizeSymbol ( const QgsSymbol s,
double  minSize,
double  maxSize,
QgsRenderContext context,
double &  width,
double &  height 
)
static

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

Parameters
sthe original symbol
minSizethe minimum size in mm
maxSizethe maximum size in mm
contextthe render context
widthexpected width, can be changed by the function
heightexpected height, can be changed by this function
Returns
0 if size is within minSize/maxSize range. New symbol if size was out of min/max range. Caller takes ownership

Definition at line 4949 of file qgssymbollayerutils.cpp.

◆ rotationFromSldElement()

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

Definition at line 2709 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
namename of ramp
rampcolor ramp to save
docXML document
Returns
DOM element representing state of color ramp
See also
loadColorRamp()

Definition at line 3347 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
filedestination file
paletteNamename of palette, which is stored in gpl file
colorscolors to export
Returns
true if export was successful
See also
importColorsFromGpl

Definition at line 3681 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 3163 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 1392 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 3259 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
uomThe uom attribute from SLD 1.1 version
sizeThe original size
Returns
the size in pixels
Since
QGIS 3.0

Definition at line 4869 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 4152 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 4229 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 4295 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()
Since
QGIS 3.0

Definition at line 3297 of file qgssymbollayerutils.cpp.

◆ symbolLayerPreviewIcon()

QIcon QgsSymbolLayerUtils::symbolLayerPreviewIcon ( const QgsSymbolLayer layer,
QgsUnitTypes::RenderUnit  u,
QSize  size,
const QgsMapUnitScale scale = QgsMapUnitScale(),
Qgis::SymbolType  parentSymbolType = Qgis::SymbolType::Hybrid 
)
static

Draws a symbol layer preview to an icon.

Parameters
layersymbol layer to draw
usize units
sizetarget size of preview icon
scalemap unit scale for preview
parentSymbolTypesince QGIS 3.22, can be used to specify the parent symbol type so that geometry generator preview icons are correctly calculated
Returns
icon containing symbol layer preview
See also
symbolLayerPreviewPicture()

Definition at line 981 of file qgssymbollayerutils.cpp.

◆ symbolLayerPreviewPicture()

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

Draws a symbol layer preview to a QPicture.

Parameters
layersymbol layer to draw
unitssize units
sizetarget size of preview picture
scalemap unit scale for preview
parentSymbolTypesince 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()
Since
QGIS 2.9

Definition at line 945 of file qgssymbollayerutils.cpp.

◆ symbolPreviewIcon()

QIcon QgsSymbolLayerUtils::symbolPreviewIcon ( const QgsSymbol symbol,
QSize  size,
int  padding = 0,
QgsLegendPatchShape shape = nullptr 
)
static

Returns an icon preview for a color ramp.

Parameters
symbolsymbol
sizetarget pixmap size
paddingspace between icon edge and symbol
shapeoptional legend patch shape to use for rendering the preview icon
See also
symbolPreviewPixmap()

Definition at line 869 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 
)
static

Returns a pixmap preview for a color ramp.

Parameters
symbolsymbol
sizetarget pixmap size
paddingspace between icon edge and symbol
customContextrender context to use when rendering symbol
selectedset to true to render the symbol in a selected state
expressionContextoptional custom expression context
shapeoptional legend patch shape to use for rendering the preview icon
Note
Parameter customContext added in QGIS 2.6
Parameter selected added in QGIS 3.10
Parameter expressionContext added in QGIS 3.10
Parameter shape added in QGIS 3.14
See also
symbolPreviewIcon()

Definition at line 874 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.

Since
QGIS 2.12

Definition at line 1446 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()
Since
QGIS 3.0

Definition at line 3279 of file qgssymbollayerutils.cpp.

◆ toPoint()

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

Converts a value to a point.

Parameters
valuevalue to convert
okif 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 550 of file qgssymbollayerutils.cpp.

◆ toSize()

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

Converts a value to a size.

Parameters
valuevalue to convert
okif 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 614 of file qgssymbollayerutils.cpp.

◆ toSymbolLayerPointers()

QSet< const QgsSymbolLayer * > QgsSymbolLayerUtils::toSymbolLayerPointers ( 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

Definition at line 4889 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 2652 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 2616 of file qgssymbollayerutils.cpp.


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