QgsSvgCache Class Reference

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

#include <qgssvgcache.h>

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

Public Member Functions
	~QgsSvgCache ()
const QImage &	svgAsImage (const QString &file, double size, const QColor &fill, const QColor &outline, double outlineWidth, double widthScaleFactor, double rasterScaleFactor, bool &fitsInCache)
	Get SVG as QImage.
const QPicture &	svgAsPicture (const QString &file, double size, const QColor &fill, const QColor &outline, double outlineWidth, double widthScaleFactor, double rasterScaleFactor, bool forceVectorOutput=false)
	Get SVG as QPicture&.
void	containsParams (const QString &path, bool &hasFillParam, QColor &defaultFillColor, bool &hasOutlineParam, QColor &defaultOutlineColor, bool &hasOutlineWidthParam, double &defaultOutlineWidth) const
	Tests if an svg file contains parameters for fill, outline color, outline width.
QByteArray	getImageData (const QString &path) const
	Get image data.

Static Public Member Functions
static QgsSvgCache *	instance ()

Protected Member Functions
	QgsSvgCache (QObject *parent=0)
	protected constructor
QgsSvgCacheEntry *	insertSVG (const QString &file, double size, const QColor &fill, const QColor &outline, double outlineWidth, double widthScaleFactor, double rasterScaleFactor)
	Creates new cache entry and returns pointer to it.
void	replaceParamsAndCacheSvg (QgsSvgCacheEntry *entry)
void	cacheImage (QgsSvgCacheEntry *entry)
void	cachePicture (QgsSvgCacheEntry *entry, bool forceVectorOutput=false)
QgsSvgCacheEntry *	cacheEntry (const QString &file, double size, const QColor &fill, const QColor &outline, double outlineWidth, double widthScaleFactor, double rasterScaleFactor)
	Returns entry from cache or creates a new entry if it does not exist already.
void	trimToMaximumSize ()
	Removes the least used items until the maximum size is under the limit.
void	takeEntryFromList (QgsSvgCacheEntry *entry)

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)"

Constructor & Destructor Documentation

QgsSvgCache::~QgsSvgCache

(

)

QgsSvgCache::QgsSvgCache ( QObject *  parent = 0 )

protected

protected constructor

Member Function Documentation

QgsSvgCacheEntry * QgsSvgCache::cacheEntry ( const QString &  file, double  size, const QColor &  fill, const QColor &  outline, double  outlineWidth, double  widthScaleFactor, double  rasterScaleFactor  )

protected

Returns entry from cache or creates a new entry if it does not exist already.

void QgsSvgCache::cacheImage ( QgsSvgCacheEntry *  entry )

protected

void QgsSvgCache::cachePicture ( QgsSvgCacheEntry *  entry, bool  forceVectorOutput = false  )

protected

void QgsSvgCache::containsParams	(	const QString &	path,
		bool &	hasFillParam,
		QColor &	defaultFillColor,
		bool &	hasOutlineParam,
		QColor &	defaultOutlineColor,
		bool &	hasOutlineWidthParam,
		double &	defaultOutlineWidth
	)		const

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

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

QByteArray QgsSvgCache::getImageData

(

const QString &

path

)

const

Get image data.

QgsSvgCacheEntry * QgsSvgCache::insertSVG ( const QString &  file, double  size, const QColor &  fill, const QColor &  outline, double  outlineWidth, double  widthScaleFactor, double  rasterScaleFactor  )

protected

Creates new cache entry and returns pointer to it.

Parameters

file	Absolute or relative path to SVG file. If the path is relative the file is searched by QgsSymbolLayerV2Utils::symbolNameToPath() in SVG paths. in settings svg/searchPathsForSVG
size	size of cached image
fill	color of fill
outline	color of outline
outlineWidth	width of outline
widthScaleFactor	width scale factor
rasterScaleFactor	raster scale factor

QgsSvgCache * QgsSvgCache::instance ( )

static

void QgsSvgCache::replaceParamsAndCacheSvg ( QgsSvgCacheEntry *  entry )

protected

void QgsSvgCache::statusChanged ( const QString &  theStatusQString )

signal

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

const QImage & QgsSvgCache::svgAsImage	(	const QString &	file,
		double	size,
		const QColor &	fill,
		const QColor &	outline,
		double	outlineWidth,
		double	widthScaleFactor,
		double	rasterScaleFactor,
		bool &	fitsInCache
	)

Get SVG as QImage.

Parameters

file	Absolute or relative path to SVG file.
size	size of cached image
fill	color of fill
outline	color of outline
outlineWidth	width of outline
widthScaleFactor	width scale factor
rasterScaleFactor	raster scale factor
fitsInCache

const QPicture & QgsSvgCache::svgAsPicture	(	const QString &	file,
		double	size,
		const QColor &	fill,
		const QColor &	outline,
		double	outlineWidth,
		double	widthScaleFactor,
		double	rasterScaleFactor,
		bool	forceVectorOutput = false
	)

Get SVG as QPicture&.

Parameters

file	Absolute or relative path to SVG file.
size	size of cached image
fill	color of fill
outline	color of outline
outlineWidth	width of outline
widthScaleFactor	width scale factor
rasterScaleFactor	raster scale factor
forceVectorOutput

void QgsSvgCache::takeEntryFromList ( QgsSvgCacheEntry *  entry )

protected

void QgsSvgCache::trimToMaximumSize ( )

protected

Removes the least used items until the maximum size is under the limit.

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/symbology-ng/qgssvgcache.h
• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/symbology-ng/qgssvgcache.cpp