QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgsembeddedsymbolrenderer.h
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1/***************************************************************************
2 qgsembeddedsymbolrenderer.h
3 ---------------------
4 begin : March 2021
5 copyright : (C) 2021 by Nyall Dawson
6 email : nyall dot dawson at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15#ifndef QGSEMBEDDEDSYMBOLRENDERER_H
16#define QGSEMBEDDEDSYMBOLRENDERER_H
17
18#include "qgis_core.h"
19#include "qgis.h"
20#include "qgsrenderer.h"
21
36{
37 public:
38
47
48 QgsSymbol *symbolForFeature( const QgsFeature &feature, QgsRenderContext &context ) const override;
49 QgsSymbol *originalSymbolForFeature( const QgsFeature &feature, QgsRenderContext &context ) const override;
50 void startRender( QgsRenderContext &context, const QgsFields &fields ) override;
51 bool renderFeature( const QgsFeature &feature, QgsRenderContext &context, int layer = -1, bool selected = false, bool drawVertexMarker = false ) SIP_THROW( QgsCsException ) override;
52 void stopRender( QgsRenderContext &context ) override;
53 QSet<QString> usedAttributes( const QgsRenderContext &context ) const override;
54 bool usesEmbeddedSymbols() const override;
55 QgsEmbeddedSymbolRenderer *clone() const override SIP_FACTORY;
56 QgsFeatureRenderer::Capabilities capabilities() override;
57 QDomElement save( QDomDocument &doc, const QgsReadWriteContext &context ) override;
58 QgsSymbolList symbols( QgsRenderContext &context ) const override;
59
64 QgsSymbol *defaultSymbol() const;
65
73 void setDefaultSymbol( QgsSymbol *symbol SIP_TRANSFER );
74
80 static QgsFeatureRenderer *create( QDomElement &element, const QgsReadWriteContext &context ) SIP_FACTORY;
81
86 static QgsEmbeddedSymbolRenderer *convertFromRenderer( const QgsFeatureRenderer *renderer ) SIP_FACTORY;
87
88 private:
89#ifdef SIP_RUN
92#endif
93
94 std::unique_ptr<QgsSymbol> mDefaultSymbol;
95
96};
97
98
99#endif // QGSEMBEDDEDSYMBOLRENDERER_H
Custom exception class for Coordinate Reference System related exceptions.
Definition: qgsexception.h:66
A vector feature renderer which uses embedded feature symbology to render per-feature symbols.
~QgsEmbeddedSymbolRenderer() override
virtual QgsSymbol * symbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const =0
To be overridden.
virtual QgsSymbol * originalSymbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const
Returns symbol for feature.
Definition: qgsrenderer.cpp:84
virtual void startRender(QgsRenderContext &context, const QgsFields &fields)
Must be called when a new render cycle is started.
Definition: qgsrenderer.cpp:96
virtual bool renderFeature(const QgsFeature &feature, QgsRenderContext &context, int layer=-1, bool selected=false, bool drawVertexMarker=false) SIP_THROW(QgsCsException)
Render a feature using this renderer in the given context.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Container of fields for a vector layer.
Definition: qgsfields.h:45
The class is used as a container of context for various read/write operations on other objects.
Contains information about the context of a rendering operation.
Abstract base class for all rendered symbols.
Definition: qgssymbol.h:93
#define SIP_THROW(name)
Definition: qgis_sip.h:198
#define SIP_TRANSFER
Definition: qgis_sip.h:36
#define SIP_FACTORY
Definition: qgis_sip.h:76
QList< QgsSymbol * > QgsSymbolList
Definition: qgsrenderer.h:44