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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)
130 lines
6.3 KiB
Plaintext
130 lines
6.3 KiB
Plaintext
class QgsSvgCacheEntry
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{
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%TypeHeaderCode
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#include <qgssvgcache.h>
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%End
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public:
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QgsSvgCacheEntry();
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QgsSvgCacheEntry( const QString& path, double size, double strokeWidth, double widthScaleFactor, const QColor& fill, const QColor& stroke );
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~QgsSvgCacheEntry();
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//! Absolute path to SVG file
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QString path;
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double size; //size in pixels (cast to int for QImage)
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double strokeWidth;
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double widthScaleFactor;
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/** SVG viewbox size.
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* @note added in QGIS 2.14
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*/
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QSizeF viewboxSize;
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QColor fill;
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QColor stroke;
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QImage *image;
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QPicture *picture;
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//content (with params replaced)
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QByteArray svgContent;
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//keep entries on a least, sorted by last access
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QgsSvgCacheEntry *nextEntry;
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QgsSvgCacheEntry *previousEntry;
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/** Don't consider image, picture, last used timestamp for comparison*/
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bool operator==( const QgsSvgCacheEntry &other ) const;
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/** Return memory usage in bytes*/
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int dataSize() const;
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private:
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QgsSvgCacheEntry( const QgsSvgCacheEntry &rh );
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};
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/** A cache for images / pictures derived from svg files. This class supports parameter replacement in svg files
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according to the svg params specification (http://www.w3.org/TR/2009/WD-SVGParamPrimer-20090616/). Supported are
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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)"*/
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class QgsSvgCache : QObject
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{
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%TypeHeaderCode
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#include <qgssvgcache.h>
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%End
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public:
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QgsSvgCache( QObject *parent /TransferThis/ = 0 );
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~QgsSvgCache();
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QImage svgAsImage( const QString& path, double size, const QColor& fill, const QColor& stroke, double strokeWidth,
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double widthScaleFactor, bool& fitsInCache );
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QPicture svgAsPicture( const QString& path, double size, const QColor& fill, const QColor& stroke, double strokeWidth,
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double widthScaleFactor, bool forceVectorOutput = false );
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QSizeF svgViewboxSize( const QString& path, double size, const QColor& fill, const QColor& stroke, double strokeWidth,
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double widthScaleFactor );
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/** Tests if an svg file contains parameters for fill, stroke color, stroke width. If yes, possible default values are returned. If there are several
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default values in the svg file, only the first one is considered*/
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void containsParams( const QString& path, bool& hasFillParam, QColor& defaultFillColor, bool& hasStrokeParam, QColor& defaultStrokeColor, bool& hasStrokeWidthParam,
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double &defaultStrokeWidth ) const;
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/** Tests if an svg file contains parameters for fill, stroke color, stroke width. If yes, possible default values are returned. If there are several
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* default values in the svg file, only the first one is considered.
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* @param path path to SVG file
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* @param hasFillParam will be true if fill param present in SVG
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* @param hasDefaultFillParam will be true if fill param has a default value specified
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* @param defaultFillColor will be set to default fill color specified in SVG, if present
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* @param hasFillOpacityParam will be true if fill opacity param present in SVG
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* @param hasDefaultFillOpacity will be true if fill opacity param has a default value specified
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* @param defaultFillOpacity will be set to default fill opacity specified in SVG, if present
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* @param hasStrokeParam will be true if stroke param present in SVG
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* @param hasDefaultStrokeColor will be true if stroke param has a default value specified
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* @param defaultStrokeColor will be set to default stroke color specified in SVG, if present
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* @param hasStrokeWidthParam will be true if stroke width param present in SVG
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* @param hasDefaultStrokeWidth will be true if stroke width param has a default value specified
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* @param defaultStrokeWidth will be set to default stroke width specified in SVG, if present
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* @param hasStrokeOpacityParam will be true if stroke opacity param present in SVG
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* @param hasDefaultStrokeOpacity will be true if stroke opacity param has a default value specified
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* @param defaultStrokeOpacity will be set to default stroke opacity specified in SVG, if present
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* @note available in python bindings as containsParamsV3
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* @note added in QGIS 2.14
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*/
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void containsParams( const QString& path, bool& hasFillParam, bool& hasDefaultFillParam, QColor& defaultFillColor,
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bool& hasFillOpacityParam, bool& hasDefaultFillOpacity, double& defaultFillOpacity,
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bool& hasStrokeParam, bool& hasDefaultStrokeColor, QColor& defaultStrokeColor,
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bool& hasStrokeWidthParam, bool& hasDefaultStrokeWidth, double& defaultStrokeWidth,
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bool &hasStrokeOpacityParam, bool &hasDefaultStrokeOpacity, double &defaultStrokeOpacity ) const /PyName=containsParamsV3/;
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/** Get image data*/
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QByteArray getImageData( const QString &path ) const;
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/** Get SVG content*/
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QByteArray svgContent( const QString& path, double size, const QColor& fill, const QColor& stroke, double strokeWidth,
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double widthScaleFactor );
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signals:
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/** Emit a signal to be caught by qgisapp and display a msg on status bar */
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void statusChanged( const QString& statusQString );
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protected:
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QgsSvgCacheEntry* insertSvg( const QString& path, double size, const QColor& fill, const QColor& stroke, double strokeWidth,
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double widthScaleFactor );
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void replaceParamsAndCacheSvg( QgsSvgCacheEntry *entry );
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void cacheImage( QgsSvgCacheEntry *entry );
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void cachePicture( QgsSvgCacheEntry *entry, bool forceVectorOutput = false );
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/** Returns entry from cache or creates a new entry if it does not exist already*/
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QgsSvgCacheEntry* cacheEntry( const QString& path, double size, const QColor& fill, const QColor& stroke, double strokeWidth,
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double widthScaleFactor );
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/** Removes the least used items until the maximum size is under the limit*/
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void trimToMaximumSize();
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//Removes entry from the ordered list (but does not delete the entry itself)
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void takeEntryFromList( QgsSvgCacheEntry *entry );
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};
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