mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-26 00:02:08 -05:00
722fdefe43
The order of the elements is irrelevant and duplicate elements are unwanted. It is therefore a perfect candidate for a set instead of a list. This prevents filtering for duplicates manually be replacing some filer codes with (more performant) builtin methods of QSet.
47 lines
1.8 KiB
Plaintext
47 lines
1.8 KiB
Plaintext
/** \ingroup core
|
|
* \class QgsNullSymbolRenderer
|
|
* \brief Null symbol renderer. Renderer which draws no symbols for features by default, but allows for labeling
|
|
* and diagrams for the layer. Selected features will also be drawn with a default symbol.
|
|
* \note Added in version 2.16
|
|
*/
|
|
|
|
class QgsNullSymbolRenderer : QgsFeatureRenderer
|
|
{
|
|
%TypeHeaderCode
|
|
#include <qgsnullsymbolrenderer.h>
|
|
%End
|
|
public:
|
|
|
|
QgsNullSymbolRenderer();
|
|
|
|
virtual ~QgsNullSymbolRenderer();
|
|
|
|
virtual QgsSymbol* symbolForFeature( QgsFeature& feature, QgsRenderContext& context );
|
|
virtual QgsSymbol* originalSymbolForFeature( QgsFeature& feature, QgsRenderContext& context );
|
|
|
|
virtual bool renderFeature( QgsFeature& feature, QgsRenderContext& context, int layer = -1, bool selected = false, bool drawVertexMarker = false );
|
|
virtual void startRender( QgsRenderContext& context, const QgsFields& fields );
|
|
virtual void stopRender( QgsRenderContext& context );
|
|
virtual bool willRenderFeature( QgsFeature& feat, QgsRenderContext& context );
|
|
|
|
virtual QSet<QString> usedAttributes() const;
|
|
virtual QString dump() const;
|
|
virtual QgsFeatureRenderer* clone() const /Factory/;
|
|
virtual QgsSymbolList symbols( QgsRenderContext& context );
|
|
|
|
/** Creates a null renderer from XML element.
|
|
* @param element DOM element
|
|
* @returns new null symbol renderer
|
|
*/
|
|
static QgsFeatureRenderer* create( QDomElement& element ) /Factory/;
|
|
|
|
virtual QDomElement save( QDomDocument& doc );
|
|
|
|
/** Creates a QgsNullSymbolRenderer from an existing renderer.
|
|
* @param renderer renderer to convert from
|
|
* @returns a new renderer if the conversion was possible, otherwise nullptr.
|
|
*/
|
|
static QgsNullSymbolRenderer* convertFromRenderer( const QgsFeatureRenderer *renderer ) /Factory/;
|
|
|
|
};
|