QGIS API Documentation  2.99.0-Master (c4aa4d0)
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QgsSvgCache Class Reference

A cache for images / pictures derived from svg files. More...

#include <qgssvgcache.h>

Inheritance diagram for QgsSvgCache:
Inheritance graph
[legend]

Signals

void statusChanged (const QString &statusQString)
 Emit a signal to be caught by qgisapp and display a msg on status bar. More...
 

Public Member Functions

 QgsSvgCache (QObject *parent=nullptr)
 Constructor for QgsSvgCache. More...
 
 ~QgsSvgCache () override
 
void containsParams (const QString &path, bool &hasFillParam, QColor &defaultFillColor, bool &hasStrokeParam, QColor &defaultStrokeColor, bool &hasStrokeWidthParam, double &defaultStrokeWidth) const
 Tests if an svg file contains parameters for fill, stroke color, stroke width. More...
 
void containsParams (const QString &path, bool &hasFillParam, bool &hasDefaultFillParam, QColor &defaultFillColor, bool &hasFillOpacityParam, bool &hasDefaultFillOpacity, double &defaultFillOpacity, bool &hasStrokeParam, bool &hasDefaultStrokeColor, QColor &defaultStrokeColor, bool &hasStrokeWidthParam, bool &hasDefaultStrokeWidth, double &defaultStrokeWidth, bool &hasStrokeOpacityParam, bool &hasDefaultStrokeOpacity, double &defaultStrokeOpacity) const
 Tests if an svg file contains parameters for fill, stroke color, stroke width. More...
 
QByteArray getImageData (const QString &path) const
 Get image data. More...
 
QImage svgAsImage (const QString &path, double size, const QColor &fill, const QColor &stroke, double strokeWidth, double widthScaleFactor, bool &fitsInCache, double fixedAspectRatio=0)
 Get SVG as QImage. More...
 
QPicture svgAsPicture (const QString &path, double size, const QColor &fill, const QColor &stroke, double strokeWidth, double widthScaleFactor, bool forceVectorOutput=false, double fixedAspectRatio=0)
 Get SVG as QPicture&. More...
 
QByteArray svgContent (const QString &path, double size, const QColor &fill, const QColor &stroke, double strokeWidth, double widthScaleFactor, double fixedAspectRatio=0)
 Get SVG content. More...
 
QSizeF svgViewboxSize (const QString &path, double size, const QColor &fill, const QColor &stroke, double strokeWidth, double widthScaleFactor, double fixedAspectRatio=0)
 Calculates the viewbox size of a (possibly cached) SVG file. More...
 

Friends

class TestQgsSvgCache
 

Detailed Description

A cache for images / pictures derived from svg files.

This class supports parameter replacement in svg files according to the svg params specification (http://www.w3.org/TR/2009/WD-SVGParamPrimer-20090616/). Supported are the parameters 'fill-color', 'pen-color', 'outline-width', 'stroke-width'. E.g. <circle fill="param(fill-color red)" stroke="param(pen-color black)" stroke-width="param(outline-width 1)"

QgsSvgCache is not usually directly created, but rather accessed through QgsApplication::svgCache().

Definition at line 128 of file qgssvgcache.h.

Constructor & Destructor Documentation

◆ QgsSvgCache()

QgsSvgCache::QgsSvgCache ( QObject *  parent = nullptr)

Constructor for QgsSvgCache.

Definition at line 81 of file qgssvgcache.cpp.

◆ ~QgsSvgCache()

QgsSvgCache::~QgsSvgCache ( )
override

Definition at line 87 of file qgssvgcache.cpp.

Member Function Documentation

◆ containsParams() [1/2]

void QgsSvgCache::containsParams ( const QString &  path,
bool &  hasFillParam,
QColor &  defaultFillColor,
bool &  hasStrokeParam,
QColor &  defaultStrokeColor,
bool &  hasStrokeWidthParam,
double &  defaultStrokeWidth 
) const

Tests if an svg file contains parameters for fill, stroke color, stroke width.

If yes, possible default values are returned. If there are several default values in the svg file, only the first one is considered

Definition at line 222 of file qgssvgcache.cpp.

◆ containsParams() [2/2]

void QgsSvgCache::containsParams ( const QString &  path,
bool &  hasFillParam,
bool &  hasDefaultFillParam,
QColor &  defaultFillColor,
bool &  hasFillOpacityParam,
bool &  hasDefaultFillOpacity,
double &  defaultFillOpacity,
bool &  hasStrokeParam,
bool &  hasDefaultStrokeColor,
QColor &  defaultStrokeColor,
bool &  hasStrokeWidthParam,
bool &  hasDefaultStrokeWidth,
double &  defaultStrokeWidth,
bool &  hasStrokeOpacityParam,
bool &  hasDefaultStrokeOpacity,
double &  defaultStrokeOpacity 
) const

Tests if an svg file contains parameters for fill, stroke color, stroke width.

If yes, possible default values are returned. If there are several default values in the svg file, only the first one is considered.

Parameters
pathpath to SVG file
hasFillParamwill be true if fill param present in SVG
hasDefaultFillParamwill be true if fill param has a default value specified
defaultFillColorwill be set to default fill color specified in SVG, if present
hasFillOpacityParamwill be true if fill opacity param present in SVG
hasDefaultFillOpacitywill be true if fill opacity param has a default value specified
defaultFillOpacitywill be set to default fill opacity specified in SVG, if present
hasStrokeParamwill be true if stroke param present in SVG
hasDefaultStrokeColorwill be true if stroke param has a default value specified
defaultStrokeColorwill be set to default stroke color specified in SVG, if present
hasStrokeWidthParamwill be true if stroke width param present in SVG
hasDefaultStrokeWidthwill be true if stroke width param has a default value specified
defaultStrokeWidthwill be set to default stroke width specified in SVG, if present
hasStrokeOpacityParamwill be true if stroke opacity param present in SVG
hasDefaultStrokeOpacitywill be true if stroke opacity param has a default value specified
defaultStrokeOpacitywill be set to default stroke opacity specified in SVG, if present
Note
available in Python bindings as containsParamsV3
Since
QGIS 2.14

Definition at line 242 of file qgssvgcache.cpp.

◆ getImageData()

QByteArray QgsSvgCache::getImageData ( const QString &  path) const

Get image data.

Definition at line 365 of file qgssvgcache.cpp.

◆ statusChanged

void QgsSvgCache::statusChanged ( const QString &  statusQString)
signal

Emit a signal to be caught by qgisapp and display a msg on status bar.

◆ svgAsImage()

QImage QgsSvgCache::svgAsImage ( const QString &  path,
double  size,
const QColor &  fill,
const QColor &  stroke,
double  strokeWidth,
double  widthScaleFactor,
bool &  fitsInCache,
double  fixedAspectRatio = 0 
)

Get SVG as QImage.

Parameters
pathAbsolute path to SVG file.
sizesize of cached image
fillcolor of fill
strokecolor of stroke
strokeWidthwidth of stroke
widthScaleFactorwidth scale factor
fitsInCache
fixedAspectRatiofixed aspect ratio (optional)

Definition at line 93 of file qgssvgcache.cpp.

◆ svgAsPicture()

QPicture QgsSvgCache::svgAsPicture ( const QString &  path,
double  size,
const QColor &  fill,
const QColor &  stroke,
double  strokeWidth,
double  widthScaleFactor,
bool  forceVectorOutput = false,
double  fixedAspectRatio = 0 
)

Get SVG as QPicture&.

Parameters
pathAbsolute path to SVG file.
sizesize of cached image
fillcolor of fill
strokecolor of stroke
strokeWidthwidth of stroke
widthScaleFactorwidth scale factor
forceVectorOutput
fixedAspectRatiofixed aspect ratio (optional)

Definition at line 153 of file qgssvgcache.cpp.

◆ svgContent()

QByteArray QgsSvgCache::svgContent ( const QString &  path,
double  size,
const QColor &  fill,
const QColor &  stroke,
double  strokeWidth,
double  widthScaleFactor,
double  fixedAspectRatio = 0 
)

Get SVG content.

Definition at line 173 of file qgssvgcache.cpp.

◆ svgViewboxSize()

QSizeF QgsSvgCache::svgViewboxSize ( const QString &  path,
double  size,
const QColor &  fill,
const QColor &  stroke,
double  strokeWidth,
double  widthScaleFactor,
double  fixedAspectRatio = 0 
)

Calculates the viewbox size of a (possibly cached) SVG file.

Parameters
pathAbsolute path to SVG file.
sizesize of cached image
fillcolor of fill
strokecolor of stroke
strokeWidthwidth of stroke
widthScaleFactorwidth scale factor
fixedAspectRatiofixed aspect ratio (optional)
Returns
viewbox size set in SVG file
Since
QGIS 2.14

Definition at line 183 of file qgssvgcache.cpp.

Friends And Related Function Documentation

◆ TestQgsSvgCache

friend class TestQgsSvgCache
friend

Definition at line 312 of file qgssvgcache.h.


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