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https://github.com/qgis/QGIS.git
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8ffd91ea90
This is necessary in order to be able to correctly translate between absolute and relative paths deeper in the code - e.g. paths to SVG files used in marker or fill symbols. Until now, relative paths were translated to absolute paths on the fly. This is now changed - paths to files should be always absolute within QGIS objects - and paths only get turned into relative when saving projects. When loading a project, relative paths are translated to absolute paths immediately. This should lower the overall confusion about relative/absolute paths within QGIS, and also allow having different base directories for relative paths (e.g. QML or QPT files may use relative paths to their directory - rather than to the project directory)
490 lines
23 KiB
Plaintext
490 lines
23 KiB
Plaintext
class QgsSymbolLayerUtils
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{
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%TypeHeaderCode
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#include <qgssymbollayerutils.h>
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%End
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public:
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static QString encodeColor( const QColor &color );
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static QColor decodeColor( const QString &str );
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static QString encodeSldAlpha( int alpha );
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static int decodeSldAlpha( const QString &str );
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static QString encodeSldFontStyle( QFont::Style style );
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static QFont::Style decodeSldFontStyle( const QString &str );
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static QString encodeSldFontWeight( int weight );
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static int decodeSldFontWeight( const QString &str );
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static QString encodePenStyle( Qt::PenStyle style );
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static Qt::PenStyle decodePenStyle( const QString &str );
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static QString encodePenJoinStyle( Qt::PenJoinStyle style );
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static Qt::PenJoinStyle decodePenJoinStyle( const QString &str );
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static QString encodePenCapStyle( Qt::PenCapStyle style );
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static Qt::PenCapStyle decodePenCapStyle( const QString &str );
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static QString encodeSldLineJoinStyle( Qt::PenJoinStyle style );
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static Qt::PenJoinStyle decodeSldLineJoinStyle( const QString &str );
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static QString encodeSldLineCapStyle( Qt::PenCapStyle style );
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static Qt::PenCapStyle decodeSldLineCapStyle( const QString &str );
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static QString encodeBrushStyle( Qt::BrushStyle style );
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static Qt::BrushStyle decodeBrushStyle( const QString &str );
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static QString encodeSldBrushStyle( Qt::BrushStyle style );
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static Qt::BrushStyle decodeSldBrushStyle( const QString &str );
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/** Encodes a QPointF to a string.
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* @see decodePoint()
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* @see encodeSize()
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*/
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static QString encodePoint( QPointF point );
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/** Decodes a QSizeF from a string.
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* @see encodePoint()
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* @see decodeSize()
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*/
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static QPointF decodePoint( const QString &string );
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/** Encodes a QSizeF to a string.
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* @see decodeSize()
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* @see encodePoint()
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* @note added in QGIS 3.0
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*/
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static QString encodeSize( QSizeF size );
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/** Decodes a QSizeF from a string.
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* @see encodeSize()
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* @see decodePoint()
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* @note added in QGIS 3.0
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*/
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static QSizeF decodeSize( const QString &string );
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static QString encodeMapUnitScale( const QgsMapUnitScale &mapUnitScale );
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static QgsMapUnitScale decodeMapUnitScale( const QString &str );
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static QString encodeRealVector( const QVector<qreal> &v );
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static QVector<qreal> decodeRealVector( const QString &s );
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static QString encodeSldRealVector( const QVector<qreal> &v );
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static QVector<qreal> decodeSldRealVector( const QString &s );
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/** Encodes a render unit into an SLD unit of measure string.
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* @param unit unit to encode
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* @param scaleFactor if specified, will be set to scale factor for unit of measure
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* @returns encoded string
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* @see decodeSldUom()
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*/
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static QString encodeSldUom( QgsUnitTypes::RenderUnit unit, double *scaleFactor );
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/** Decodes a SLD unit of measure string to a render unit.
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* @param str string to decode
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* @param scaleFactor if specified, will be set to scale factor for unit of measure
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* @returns matching render unit
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* @see encodeSldUom()
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*/
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static QgsUnitTypes::RenderUnit decodeSldUom( const QString &str, double *scaleFactor );
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static QString encodeScaleMethod( QgsSymbol::ScaleMethod scaleMethod );
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static QgsSymbol::ScaleMethod decodeScaleMethod( const QString &str );
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static QPainter::CompositionMode decodeBlendMode( const QString &s );
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/** Returns an icon preview for a color ramp.
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* @param symbol symbol
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* @param size target pixmap size
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* @param padding space between icon edge and symbol
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* @see symbolPreviewPixmap()
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*/
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static QIcon symbolPreviewIcon( QgsSymbol *symbol, QSize size, int padding = 0 );
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/** Returns a pixmap preview for a color ramp.
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* @param symbol symbol
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* @param size target pixmap size
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* @param padding space between icon edge and symbol
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* @param customContext render context to use when rendering symbol
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* @note customContext parameter added in 2.6
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* @see symbolPreviewIcon()
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*/
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static QPixmap symbolPreviewPixmap( QgsSymbol *symbol, QSize size, int padding = 0, QgsRenderContext *customContext = 0 );
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/** Draws a symbol layer preview to a QPicture
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* @param layer symbol layer to draw
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* @param units size units
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* @param size target size of preview picture
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* @param scale map unit scale for preview
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* @returns QPicture containing symbol layer preview
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* @note added in QGIS 2.9
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* @see symbolLayerPreviewIcon()
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*/
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static QPicture symbolLayerPreviewPicture( QgsSymbolLayer *layer, QgsUnitTypes::RenderUnit units, QSize size, const QgsMapUnitScale &scale = QgsMapUnitScale() );
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/** Draws a symbol layer preview to an icon.
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* @param layer symbol layer to draw
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* @param u size units
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* @param size target size of preview icon
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* @param scale map unit scale for preview
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* @returns icon containing symbol layer preview
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* @see symbolLayerPreviewPicture()
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*/
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static QIcon symbolLayerPreviewIcon( QgsSymbolLayer *layer, QgsUnitTypes::RenderUnit u, QSize size, const QgsMapUnitScale &scale = QgsMapUnitScale() );
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/** Returns a icon preview for a color ramp.
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* @param ramp color ramp
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* @param size target icon size
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* @param padding space between icon edge and symbol
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* @see colorRampPreviewPixmap()
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*/
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static QIcon colorRampPreviewIcon( QgsColorRamp *ramp, QSize size, int padding = 0 );
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/** Returns a pixmap preview for a color ramp.
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* @param ramp color ramp
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* @param size target pixmap size
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* @param padding space between icon edge and symbol
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* @see colorRampPreviewIcon()
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*/
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static QPixmap colorRampPreviewPixmap( QgsColorRamp *ramp, QSize size, int padding = 0 );
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static void drawStippledBackground( QPainter *painter, QRect rect );
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/** Returns the maximum estimated bleed for the symbol */
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static double estimateMaxSymbolBleed( QgsSymbol *symbol, const QgsRenderContext &context );
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/** Attempts to load a symbol from a DOM element
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* @param element DOM element representing symbol
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* @returns decoded symbol, if possible
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*/
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static QgsSymbol* loadSymbol( const QDomElement& element, const QgsPathResolver &pathResolver ) /Factory/;
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/** Attempts to load a symbol from a DOM element and cast it to a particular symbol
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* type.
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* @param element DOM element representing symbol
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* @returns decoded symbol cast to specified type, if possible
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* @note not available in python bindings
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*/
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//template <class SymbolType> static SymbolType* loadSymbol( const QDomElement& element, const QgsPathResolver &pathResolver );
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static QgsSymbolLayer* loadSymbolLayer( QDomElement& element, const QgsPathResolver &pathResolver ) /Factory/;
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static QDomElement saveSymbol( const QString& symbolName, QgsSymbol* symbol, QDomDocument& doc, const QgsPathResolver &pathResolver );
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/** Returns a string representing the symbol. Can be used to test for equality
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* between symbols.
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* @note added in QGIS 2.12
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*/
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static QString symbolProperties( QgsSymbol *symbol );
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static bool createSymbolLayerListFromSld( QDomElement &element, QgsWkbTypes::GeometryType geomType, QgsSymbolLayerList &layers );
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static QgsSymbolLayer *createFillLayerFromSld( QDomElement &element );
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static QgsSymbolLayer *createLineLayerFromSld( QDomElement &element );
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static QgsSymbolLayer *createMarkerLayerFromSld( QDomElement &element );
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static bool convertPolygonSymbolizerToPointMarker( QDomElement &element, QgsSymbolLayerList &layerList );
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static bool hasExternalGraphic( QDomElement &element );
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static bool hasWellKnownMark( QDomElement &element );
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static bool needFontMarker( QDomElement &element );
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static bool needSvgMarker( QDomElement &element );
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static bool needEllipseMarker( QDomElement &element );
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static bool needMarkerLine( QDomElement &element );
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static bool needLinePatternFill( QDomElement &element );
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static bool needPointPatternFill( QDomElement &element );
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static bool needSvgFill( QDomElement &element );
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static void fillToSld( QDomDocument &doc, QDomElement &element,
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Qt::BrushStyle brushStyle, const QColor &color = QColor() );
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static bool fillFromSld( QDomElement &element,
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Qt::BrushStyle &brushStyle, QColor &color );
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//! @note not available in python bindings
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/*
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static void lineToSld( QDomDocument &doc, QDomElement &element,
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Qt::PenStyle penStyle, const QColor& color, double width = -1,
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const Qt::PenJoinStyle *penJoinStyle = 0, const Qt::PenCapStyle *penCapStyle = 0,
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const QVector<qreal> *customDashPattern = 0, double dashOffset = 0.0 );
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*/
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static bool lineFromSld( QDomElement &element,
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Qt::PenStyle &penStyle, QColor &color, double &width,
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Qt::PenJoinStyle *penJoinStyle = 0, Qt::PenCapStyle *penCapStyle = 0,
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QVector<qreal> *customDashPattern = 0, double *dashOffset = 0 );
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static void externalGraphicToSld( QDomDocument &doc, QDomElement &element,
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const QString& path, const QString& mime,
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const QColor &color, double size = -1 );
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static bool externalGraphicFromSld( QDomElement &element,
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QString &path, QString &mime,
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QColor &color, double &size );
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static void wellKnownMarkerToSld( QDomDocument &doc, QDomElement &element,
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const QString& name, const QColor& color, const QColor& strokeColor, Qt::PenStyle strokeStyle,
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double strokeWidth = -1, double size = -1 );
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//! @note available in python as wellKnownMarkerFromSld2
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static bool wellKnownMarkerFromSld( QDomElement &element,
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QString &name, QColor &color, QColor &strokeColor, Qt::PenStyle &strokeStyle,
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double &strokeWidth, double &size ) /PyName=wellKnownMarkerFromSld2/;
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static void externalMarkerToSld( QDomDocument &doc, QDomElement &element,
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const QString& path, const QString& format, int *markIndex = 0,
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const QColor &color = QColor(), double size = -1 );
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static bool externalMarkerFromSld( QDomElement &element,
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QString &path, QString &format, int &markIndex,
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QColor &color, double &size );
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static void labelTextToSld( QDomDocument &doc, QDomElement &element, const QString& label,
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const QFont &font, const QColor &color = QColor(), double size = -1 );
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/** Create ogr feature style string for pen */
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static QString ogrFeatureStylePen( double width, double mmScaleFactor, double mapUnitsScaleFactor, const QColor& c,
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Qt::PenJoinStyle joinStyle = Qt::MiterJoin,
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Qt::PenCapStyle capStyle = Qt::FlatCap,
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double offset = 0.0,
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const QVector<qreal> *dashPattern = 0 );
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/** Create ogr feature style string for brush
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@param fillColr fill color*/
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static QString ogrFeatureStyleBrush( const QColor &fillColr );
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static void createRotationElement( QDomDocument &doc, QDomElement &element, const QString &rotationFunc );
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static bool rotationFromSldElement( QDomElement &element, QString &rotationFunc );
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static void createOpacityElement( QDomDocument &doc, QDomElement &element, const QString &alphaFunc );
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static bool opacityFromSldElement( QDomElement &element, QString &alphaFunc );
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static void createDisplacementElement( QDomDocument &doc, QDomElement &element, QPointF offset );
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static bool displacementFromSldElement( QDomElement &element, QPointF &offset );
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static void createOnlineResourceElement( QDomDocument &doc, QDomElement &element, const QString &path, const QString &format );
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static bool onlineResourceFromSldElement( QDomElement &element, QString &path, QString &format );
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static void createGeometryElement( QDomDocument &doc, QDomElement &element, const QString &geomFunc );
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static bool geometryFromSldElement( QDomElement &element, QString &geomFunc );
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static bool createExpressionElement( QDomDocument &doc, QDomElement &element, const QString &function );
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static bool createFunctionElement( QDomDocument &doc, QDomElement &element, const QString &function );
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static bool functionFromSldElement( QDomElement &element, QString &function );
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static QDomElement createSvgParameterElement( QDomDocument &doc, const QString &name, const QString &value );
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static QgsStringMap getSvgParameterList( QDomElement &element );
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static QDomElement createVendorOptionElement( QDomDocument &doc, const QString &name, const QString &value );
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static QgsStringMap getVendorOptionList( QDomElement &element );
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static QgsStringMap parseProperties( QDomElement &element );
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static void saveProperties( QgsStringMap props, QDomDocument &doc, QDomElement &element );
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static QgsSymbolMap loadSymbols( QDomElement& element, const QgsPathResolver &pathResolver ) /Factory/;
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static QDomElement saveSymbols( QgsSymbolMap& symbols, const QString& tagName, QDomDocument& doc, const QgsPathResolver &pathResolver );
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static void clearSymbolMap( QgsSymbolMap &symbols );
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static QgsColorRamp *loadColorRamp( QDomElement &element ) /Factory/;
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static QDomElement saveColorRamp( const QString &name, QgsColorRamp *ramp, QDomDocument &doc );
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static QVariant colorRampToVariant( const QString &name, QgsColorRamp *ramp );
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static QgsColorRamp *loadColorRamp( const QVariant &value );
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/**
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* Returns a friendly display name for a color
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* @param color source color
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* @returns display name for color
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* @note added in 2.5
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*/
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static QString colorToName( const QColor &color );
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/**
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* Attempts to parse a string as a list of colors using a variety of common formats, including hex
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* codes, rgb and rgba strings.
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* @param colorStr string representing the color list
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* @returns list of parsed colors
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* @note added in 2.5
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*/
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static QList< QColor > parseColorList( const QString &colorStr );
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/**
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* Creates mime data from a color. Sets both the mime data's color data, and the
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* mime data's text with the color's hex code.
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* @param color color to encode as mime data
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* @see colorFromMimeData
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* @note added in 2.5
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*/
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static QMimeData *colorToMimeData( const QColor &color );
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/**
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* Attempts to parse mime data as a color
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* @param data mime data to parse
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* @param hasAlpha will be set to true if mime data was interpreted as a color containing
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* an explicit alpha value
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* @returns valid color if mimedata could be interpreted as a color, otherwise an
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* invalid color
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* @note added in 2.5
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*/
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static QColor colorFromMimeData( const QMimeData *data, bool &hasAlpha );
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/**
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* Attempts to parse mime data as a list of named colors
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* @param data mime data to parse
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* @returns list of parsed colors
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* @note added in 2.5
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*/
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static QgsNamedColorList colorListFromMimeData( const QMimeData *data );
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/**
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* Creates mime data from a list of named colors
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* @param colorList list of named colors
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* @param allFormats set to true to include additional mime formats, include text/plain and application/x-color
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* @returns mime data containing encoded colors
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* @note added in 2.5
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*/
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static QMimeData *colorListToMimeData( const QgsNamedColorList &colorList, const bool allFormats = true );
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/**
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* Exports colors to a gpl GIMP palette file
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* @param file destination file
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* @param paletteName name of palette, which is stored in gpl file
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* @param colors colors to export
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* @returns true if export was successful
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* @see importColorsFromGpl
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*/
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static bool saveColorsToGpl( QFile &file, const QString &paletteName, const QgsNamedColorList &colors );
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/**
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* Imports colors from a gpl GIMP palette file
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* @param file source gpl file
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* @param ok will be true if file was successfully read
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* @param name will be set to palette name from gpl file, if present
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* @returns list of imported colors
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* @see saveColorsToGpl
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*/
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static QgsNamedColorList importColorsFromGpl( QFile &file, bool &ok, QString &name );
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/**
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* Attempts to parse a string as a color using a variety of common formats, including hex
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* codes, rgb and rgba strings.
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* @param colorStr string representing the color
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* @param strictEval set to true for stricter color parsing rules
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* @returns parsed color
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* @note added in 2.3
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*/
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static QColor parseColor( const QString &colorStr, bool strictEval = false );
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/**
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* Attempts to parse a string as a color using a variety of common formats, including hex
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* codes, rgb and rgba strings.
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* @param colorStr string representing the color
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* @param containsAlpha if colorStr contains an explicit alpha value then containsAlpha will be set to true
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* @param strictEval set to true for stricter color parsing rules
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* @returns parsed color
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* @note added in 2.3
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*/
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static QColor parseColorWithAlpha( const QString &colorStr, bool &containsAlpha, bool strictEval = false );
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/** Multiplies opacity of image pixel values with a (global) transparency value*/
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static void multiplyImageOpacity( QImage *image, qreal alpha );
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/** Blurs an image in place, e.g. creating Qt-independent drop shadows */
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static void blurImageInPlace( QImage &image, QRect rect, int radius, bool alphaOnly );
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/** Converts a QColor into a premultiplied ARGB QColor value using a specified alpha value
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* @note added in 2.3
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*/
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static void premultiplyColor( QColor &rgb, int alpha );
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/** Sorts the passed list in requested order*/
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static void sortVariantList( QList<QVariant> &list, Qt::SortOrder order );
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/** Returns a point on the line from startPoint to directionPoint that is a certain distance away from the starting point*/
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static QPointF pointOnLineWithDistance( QPointF startPoint, QPointF directionPoint, double distance );
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//! Return a list of all available svg files
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static QStringList listSvgFiles();
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//! Return a list of svg files at the specified directory
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static QStringList listSvgFilesAt( const QString &directory );
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static QString svgSymbolNameToPath( QString name, const QgsPathResolver& pathResolver );
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static QString svgSymbolPathToName( QString path, const QgsPathResolver& pathResolver );
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//! Calculate the centroid point of a QPolygonF
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static QPointF polygonCentroid( const QPolygonF &points );
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//! Calculate a point within of a QPolygonF
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static QPointF polygonPointOnSurface( const QPolygonF &points );
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//! Calculate whether a point is within of a QPolygonF
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static bool pointInPolygon( const QPolygonF &points, QPointF point );
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/** Return a new valid expression instance for given field or expression string.
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* If the input is not a valid expression, it is assumed that it is a field name and gets properly quoted.
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* If the string is empty, returns null pointer.
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* This is useful when accepting input which could be either a non-quoted field name or expression.
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* @note added in 2.2
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*/
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static QgsExpression *fieldOrExpressionToExpression( const QString &fieldOrExpression ) /Factory/;
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/** Return a field name if the whole expression is just a name of the field .
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* Returns full expression string if the expression is more complex than just one field.
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* Using just expression->expression() method may return quoted field name, but that is not
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* wanted for saving (due to backward compatibility) or display in GUI.
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* @note added in 2.2
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*/
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static QString fieldOrExpressionFromExpression( QgsExpression *expression );
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/** Computes a sequence of about 'classes' equally spaced round values
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* which cover the range of values from 'minimum' to 'maximum'.
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* The values are chosen so that they are 1, 2 or 5 times a power of 10.
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* @note added in 2.10
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*/
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static QList<double> prettyBreaks( double minimum, double maximum, int classes );
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/** Rescales the given size based on the uomScale found in the props, if any is found, otherwise
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* returns the value un-modified
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* @note added in 3.0
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*/
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static double rescaleUom( double size, QgsUnitTypes::RenderUnit unit, const QgsStringMap &props );
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/** Rescales the given point based on the uomScale found in the props, if any is found, otherwise
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* returns a copy of the original point
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* @note added in 3.0
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*/
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static QPointF rescaleUom( QPointF point, QgsUnitTypes::RenderUnit unit, const QgsStringMap &props ) /PyName=rescalePointUom/;
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/** Rescales the given array based on the uomScale found in the props, if any is found, otherwise
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* returns a copy of the original point
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* @note added in 3.0
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*/
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static QVector<qreal> rescaleUom( const QVector<qreal> &array, QgsUnitTypes::RenderUnit unit, const QgsStringMap &props ) /PyName=rescaleArrayUom/;
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/**
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* Checks if the properties contain scaleMinDenom and scaleMaxDenom, if available, they are added into the SE Rule element
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* @note added in 3.0
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*/
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static void applyScaleDependency( QDomDocument &doc, QDomElement &ruleElem, QgsStringMap &props );
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/**
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* Merges the local scale limits, if any, with the ones already in the map, if any
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* @note added in 3.0
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*/
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static void mergeScaleDependencies( int mScaleMinDenom, int mScaleMaxDenom, QgsStringMap &props );
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/**
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* Encodes a reference to a parametric SVG into SLD, as a succession of parametric SVG using URL parameters,
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* a fallback SVG without parameters, and a final fallback as a mark with the right colors and stroke for systems
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* that cannot do SVG at all
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* @note added in 3.0
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*/
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static void parametricSvgToSld( QDomDocument &doc, QDomElement &graphicElem,
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const QString& path,
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const QColor &fillColor, double size, const QColor &strokeColor, double strokeWidth );
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/**
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* Encodes a reference to a parametric SVG into a path with parameters according to the SVG Parameters spec
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* @note added in 3.0
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*/
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static QString getSvgParametricPath( const QString &basePath, const QColor &fillColor, const QColor &strokeColor, double strokeWidth );
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};
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