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23a7bd0fd9
This should make the read/write methods more flexible if we need to give them extra context.
47 lines
1.9 KiB
Plaintext
47 lines
1.9 KiB
Plaintext
/** \ingroup core
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* \class QgsNullSymbolRenderer
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* \brief Null symbol renderer. Renderer which draws no symbols for features by default, but allows for labeling
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* and diagrams for the layer. Selected features will also be drawn with a default symbol.
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* \note Added in version 2.16
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*/
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class QgsNullSymbolRenderer : QgsFeatureRenderer
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{
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%TypeHeaderCode
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#include <qgsnullsymbolrenderer.h>
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%End
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public:
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QgsNullSymbolRenderer();
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virtual ~QgsNullSymbolRenderer();
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virtual QgsSymbol *symbolForFeature( QgsFeature &feature, QgsRenderContext &context );
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virtual QgsSymbol *originalSymbolForFeature( QgsFeature &feature, QgsRenderContext &context );
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virtual bool renderFeature( QgsFeature &feature, QgsRenderContext &context, int layer = -1, bool selected = false, bool drawVertexMarker = false );
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virtual void startRender( QgsRenderContext &context, const QgsFields &fields );
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virtual void stopRender( QgsRenderContext &context );
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virtual bool willRenderFeature( QgsFeature &feat, QgsRenderContext &context );
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virtual QSet<QString> usedAttributes( const QgsRenderContext &context ) const;
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virtual QString dump() const;
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virtual QgsFeatureRenderer *clone() const /Factory/;
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virtual QgsSymbolList symbols( QgsRenderContext &context );
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/** Creates a null renderer from XML element.
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* @param element DOM element
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* @returns new null symbol renderer
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*/
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static QgsFeatureRenderer* create( QDomElement& element, const QgsReadWriteContext &context ) /Factory/;
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virtual QDomElement save( QDomDocument& doc, const QgsReadWriteContext &context );
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/** Creates a QgsNullSymbolRenderer from an existing renderer.
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* @param renderer renderer to convert from
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* @returns a new renderer if the conversion was possible, otherwise nullptr.
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*/
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static QgsNullSymbolRenderer *convertFromRenderer( const QgsFeatureRenderer *renderer ) /Factory/;
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};
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