QGIS API Documentation
3.0.2-Girona (307d082)
src
core
symbology
qgspointclusterrenderer.h
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/***************************************************************************
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qgspointclusterrenderer.h
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-------------------------
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begin : February 2016
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copyright : (C) 2016 by Nyall Dawson
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email : nyall dot dawson at gmail dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSPOINTCLUSTERRENDERER_H
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#define QGSPOINTCLUSTERRENDERER_H
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#include "qgis_core.h"
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#include "
qgis.h
"
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#include "
qgspointdistancerenderer.h
"
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class
CORE_EXPORT
QgsPointClusterRenderer
:
public
QgsPointDistanceRenderer
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{
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public
:
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QgsPointClusterRenderer
();
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QgsPointClusterRenderer
*
clone
()
const
override
SIP_FACTORY
;
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void
startRender
(
QgsRenderContext
&context,
const
QgsFields
&fields )
override
;
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void
stopRender
(
QgsRenderContext
&context )
override
;
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QDomElement
save
( QDomDocument &doc,
const
QgsReadWriteContext
&context )
override
;
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QSet<QString>
usedAttributes
(
const
QgsRenderContext
&context )
const override
;
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static
QgsFeatureRenderer
*create( QDomElement &symbologyElem,
const
QgsReadWriteContext
&context )
SIP_FACTORY
;
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QgsMarkerSymbol
*clusterSymbol();
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void
setClusterSymbol(
QgsMarkerSymbol
*symbol
SIP_TRANSFER
);
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static
QgsPointClusterRenderer
*convertFromRenderer(
const
QgsFeatureRenderer
*renderer )
SIP_FACTORY
;
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private
:
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#ifdef SIP_RUN
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QgsPointClusterRenderer
(
const
QgsPointClusterRenderer
& );
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QgsPointClusterRenderer
&operator=(
const
QgsPointClusterRenderer
& );
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#endif
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std::unique_ptr< QgsMarkerSymbol > mClusterSymbol;
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void
drawGroup( QPointF centerPoint,
QgsRenderContext
&context,
const
QgsPointDistanceRenderer::ClusteredGroup
&group )
override
SIP_FORCE
;
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};
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#endif // QGSPOINTCLUSTERRENDERER_H
QgsPointDistanceRenderer
An abstract base class for distance based point renderers (e.g., clusterer and displacement renderers...
Definition:
qgspointdistancerenderer.h:38
QgsReadWriteContext
The class is used as a container of context for various read/write operations on other objects...
Definition:
qgsreadwritecontext.h:29
qgspointdistancerenderer.h
QgsFeatureRenderer::save
virtual QDomElement save(QDomDocument &doc, const QgsReadWriteContext &context)
store renderer info to XML element
Definition:
qgsrenderer.cpp:177
QgsFields
Container of fields for a vector layer.
Definition:
qgsfields.h:42
QgsPointDistanceRenderer::stopRender
void stopRender(QgsRenderContext &context) override
Must be called when a render cycle has finished, to allow the renderer to clean up.
Definition:
qgspointdistancerenderer.cpp:318
QgsMarkerSymbol
Definition:
qgssymbol.h:611
SIP_FORCE
#define SIP_FORCE
Definition:
qgis_sip.h:124
QgsPointClusterRenderer
A renderer that automatically clusters points with the same geographic position.
Definition:
qgspointclusterrenderer.h:31
SIP_TRANSFER
#define SIP_TRANSFER
Definition:
qgis_sip.h:36
QgsPointDistanceRenderer::startRender
void startRender(QgsRenderContext &context, const QgsFields &fields) override
Must be called when a new render cycle is started.
Definition:
qgspointdistancerenderer.cpp:288
SIP_FACTORY
#define SIP_FACTORY
Definition:
qgis_sip.h:69
QgsRenderContext
Contains information about the context of a rendering operation.
Definition:
qgsrendercontext.h:51
QgsPointDistanceRenderer::ClusteredGroup
QList< QgsPointDistanceRenderer::GroupedFeature > ClusteredGroup
A group of clustered points (ie features within the distance tolerance).
Definition:
qgspointdistancerenderer.h:77
QgsFeatureRenderer
Definition:
qgsrenderer.h:90
qgis.h
QgsFeatureRenderer::clone
virtual QgsFeatureRenderer * clone() const =0
Create a deep copy of this renderer.
QgsPointDistanceRenderer::usedAttributes
QSet< QString > usedAttributes(const QgsRenderContext &context) const override
Return a list of attributes required by this renderer.
Definition:
qgspointdistancerenderer.cpp:207
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