QGIS API Documentation 3.41.0-Master (3440c17df1d)
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qgsrendererregistry.cpp
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1/***************************************************************************
2 qgsrendererregistry.cpp
3 ---------------------
4 begin : November 2009
5 copyright : (C) 2009 by Martin Dobias
6 email : wonder dot sk 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#include "qgsrendererregistry.h"
16
17// default renderers
18#include "qgssinglesymbolrenderer.h"
19#include "qgscategorizedsymbolrenderer.h"
20#include "qgsgraduatedsymbolrenderer.h"
21#include "qgsrulebasedrenderer.h"
22#include "qgspointdisplacementrenderer.h"
23#include "qgspointclusterrenderer.h"
24#include "qgsinvertedpolygonrenderer.h"
25#include "qgsmergedfeaturerenderer.h"
26#include "qgsheatmaprenderer.h"
27#include "qgs25drenderer.h"
28#include "qgsembeddedsymbolrenderer.h"
29#include "qgsnullsymbolrenderer.h"
30#include "qgsvectorlayer.h"
31#include "qgsmarkersymbol.h"
32
33QgsRendererRegistry::QgsRendererRegistry()
34{
35 // add default renderers
36 addRenderer( new QgsRendererMetadata( QStringLiteral( "nullSymbol" ),
37 QObject::tr( "No Symbols" ),
38 QgsNullSymbolRenderer::create ) );
39
40 addRenderer( new QgsRendererMetadata( QStringLiteral( "singleSymbol" ),
41 QObject::tr( "Single Symbol" ),
42 QgsSingleSymbolRenderer::create,
43 QgsSingleSymbolRenderer::createFromSld ) );
44
45 addRenderer( new QgsRendererMetadata( QStringLiteral( "categorizedSymbol" ),
46 QObject::tr( "Categorized" ),
47 QgsCategorizedSymbolRenderer::create ) );
48
49 addRenderer( new QgsRendererMetadata( QStringLiteral( "graduatedSymbol" ),
50 QObject::tr( "Graduated" ),
51 QgsGraduatedSymbolRenderer::create ) );
52
53 addRenderer( new QgsRendererMetadata( QStringLiteral( "RuleRenderer" ),
54 QObject::tr( "Rule-based" ),
55 QgsRuleBasedRenderer::create,
56 QgsRuleBasedRenderer::createFromSld ) );
57
58 addRenderer( new QgsRendererMetadata( QStringLiteral( "pointDisplacement" ),
59 QObject::tr( "Point Displacement" ),
60 QgsPointDisplacementRenderer::create,
61 QIcon(),
62 nullptr,
63 QgsRendererAbstractMetadata::PointLayer ) );
64
65 addRenderer( new QgsRendererMetadata( QStringLiteral( "pointCluster" ),
66 QObject::tr( "Point Cluster" ),
67 QgsPointClusterRenderer::create,
68 QIcon(),
69 nullptr,
70 QgsRendererAbstractMetadata::PointLayer ) );
71
72 addRenderer( new QgsRendererMetadata( QStringLiteral( "mergedFeatureRenderer" ),
73 QObject::tr( "Merged Features" ),
74 QgsMergedFeatureRenderer::create,
75 QIcon(),
76 nullptr,
77 QgsRendererAbstractMetadata::LineLayer | QgsRendererAbstractMetadata::PolygonLayer ) );
78
79 addRenderer( new QgsRendererMetadata( QStringLiteral( "invertedPolygonRenderer" ),
80 QObject::tr( "Inverted Polygons" ),
81 QgsInvertedPolygonRenderer::create,
82 QIcon(),
83 nullptr,
84 QgsRendererAbstractMetadata::PolygonLayer ) );
85
86 addRenderer( new QgsRendererMetadata( QStringLiteral( "heatmapRenderer" ),
87 QObject::tr( "Heatmap" ),
88 QgsHeatmapRenderer::create,
89 QIcon(),
90 nullptr,
91 QgsRendererAbstractMetadata::PointLayer ) );
92
93
94 addRenderer( new QgsRendererMetadata( QStringLiteral( "25dRenderer" ),
95 QObject::tr( "2.5 D" ),
96 Qgs25DRenderer::create,
97 QIcon(),
98 nullptr,
99 QgsRendererAbstractMetadata::PolygonLayer ) );
100
101 addRenderer( new QgsRendererMetadata( QStringLiteral( "embeddedSymbol" ),
102 QObject::tr( "Embedded Symbols" ),
103 QgsEmbeddedSymbolRenderer::create ) );
104}
105
106QgsRendererRegistry::~QgsRendererRegistry()
107{
108 qDeleteAll( mRenderers );
109}
110
111bool QgsRendererRegistry::addRenderer( QgsRendererAbstractMetadata *metadata )
112{
113 if ( !metadata || mRenderers.contains( metadata->name() ) )
114 return false;
115
116 mRenderers[metadata->name()] = metadata;
117 mRenderersOrder << metadata->name();
118 return true;
119}
120
121bool QgsRendererRegistry::removeRenderer( const QString &rendererName )
122{
123 if ( !mRenderers.contains( rendererName ) )
124 return false;
125
126 delete mRenderers[rendererName];
127 mRenderers.remove( rendererName );
128 mRenderersOrder.removeAll( rendererName );
129 return true;
130}
131
132QgsRendererAbstractMetadata *QgsRendererRegistry::rendererMetadata( const QString &rendererName )
133{
134 return mRenderers.value( rendererName );
135}
136
137QStringList QgsRendererRegistry::renderersList( QgsRendererAbstractMetadata::LayerTypes layerTypes ) const
138{
139 QStringList renderers;
140 const auto constMRenderersOrder = mRenderersOrder;
141 for ( const QString &renderer : constMRenderersOrder )
142 {
143 QgsRendererAbstractMetadata *r = mRenderers.value( renderer );
144 if ( r && r->compatibleLayerTypes() & layerTypes )
145 renderers << renderer;
146 }
147 return renderers;
148}
149
150QStringList QgsRendererRegistry::renderersList( const QgsVectorLayer *layer ) const
151{
152 QgsRendererAbstractMetadata::LayerType layerType = QgsRendererAbstractMetadata::All;
153
154 switch ( layer->geometryType() )
155 {
156 case Qgis::GeometryType::Point:
157 layerType = QgsRendererAbstractMetadata::PointLayer;
158 break;
159
160 case Qgis::GeometryType::Line:
161 layerType = QgsRendererAbstractMetadata::LineLayer;
162 break;
163
164 case Qgis::GeometryType::Polygon:
165 layerType = QgsRendererAbstractMetadata::PolygonLayer;
166 break;
167
168 case Qgis::GeometryType::Unknown:
169 case Qgis::GeometryType::Null:
170 break;
171 }
172
173 return renderersList( layerType );
174}
Qgis::GeometryType::Polygon
@ Polygon
Polygons.
Qgis::GeometryType::Unknown
@ Unknown
Unknown types.
Qgis::GeometryType::Null
@ Null
No geometry.
Qgs25DRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Create a new 2.5D renderer from XML.
Definition qgs25drenderer.cpp:140
QgsCategorizedSymbolRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a categorized renderer from an XML element.
Definition qgscategorizedsymbolrenderer.cpp:716
QgsEmbeddedSymbolRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a new embedded symbol renderer from an XML element, using the supplied read/write context.
Definition qgsembeddedsymbolrenderer.cpp:104
QgsGraduatedSymbolRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
create renderer from XML element
Definition qgsgraduatedsymbolrenderer.cpp:480
QgsHeatmapRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a new heatmap renderer instance from XML.
Definition qgsheatmaprenderer.cpp:316
QgsInvertedPolygonRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a renderer out of an XML, for loading.
Definition qgsinvertedpolygonrenderer.cpp:68
QgsMergedFeatureRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a renderer out of an XML, for loading.
Definition qgsmergedfeaturerenderer.cpp:455
QgsNullSymbolRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a null renderer from XML element.
Definition qgsnullsymbolrenderer.cpp:103
QgsPointClusterRenderer::create
static QgsFeatureRenderer * create(QDomElement &symbologyElem, const QgsReadWriteContext &context)
Creates a renderer from XML element.
Definition qgspointclusterrenderer.cpp:108
QgsPointDisplacementRenderer::create
static QgsFeatureRenderer * create(QDomElement &symbologyElem, const QgsReadWriteContext &context)
Create a renderer from XML element.
Definition qgspointdisplacementrenderer.cpp:166
QgsRendererAbstractMetadata
Stores metadata about one renderer class.
Definition qgsrendererregistry.h:42
QgsRendererAbstractMetadata::LayerType
LayerType
Layer types the renderer is compatible with.
Definition qgsrendererregistry.h:49
QgsRendererAbstractMetadata::All
@ All
Compatible with all vector layers.
Definition qgsrendererregistry.h:53
QgsRendererAbstractMetadata::LineLayer
@ LineLayer
Compatible with line layers.
Definition qgsrendererregistry.h:51
QgsRendererAbstractMetadata::PolygonLayer
@ PolygonLayer
Compatible with polygon layers.
Definition qgsrendererregistry.h:52
QgsRendererAbstractMetadata::PointLayer
@ PointLayer
Compatible with point layers.
Definition qgsrendererregistry.h:50
QgsRendererAbstractMetadata::compatibleLayerTypes
virtual QgsRendererAbstractMetadata::LayerTypes compatibleLayerTypes() const
Returns flags indicating the types of layer the renderer is compatible with.
Definition qgsrendererregistry.h:98
QgsRendererAbstractMetadata::name
QString name() const
Returns the unique name of the renderer.
Definition qgsrendererregistry.h:75
QgsRendererMetadata
Convenience metadata class that uses static functions to create renderer and its widget.
Definition qgsrendererregistry.h:144
QgsRendererRegistry::addRenderer
bool addRenderer(QgsRendererAbstractMetadata *metadata)
Adds a renderer to the registry.
Definition qgsrendererregistry.cpp:111
QgsRendererRegistry::renderersList
QStringList renderersList(QgsRendererAbstractMetadata::LayerTypes layerTypes=QgsRendererAbstractMetadata::All) const
Returns a list of available renderers.
Definition qgsrendererregistry.cpp:137
QgsRendererRegistry::rendererMetadata
QgsRendererAbstractMetadata * rendererMetadata(const QString &rendererName)
Returns the metadata for a specified renderer.
Definition qgsrendererregistry.cpp:132
QgsRendererRegistry::removeRenderer
bool removeRenderer(const QString &rendererName)
Removes a renderer from registry.
Definition qgsrendererregistry.cpp:121
QgsRuleBasedRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a new rule-based renderer instance from XML.
Definition qgsrulebasedrenderer.cpp:1285
QgsRuleBasedRenderer::createFromSld
static QgsFeatureRenderer * createFromSld(QDomElement &element, Qgis::GeometryType geomType)
Creates a new rule based renderer from an SLD XML element.
Definition qgsrulebasedrenderer.cpp:1308
QgsSingleSymbolRenderer::createFromSld
static QgsFeatureRenderer * createFromSld(QDomElement &element, Qgis::GeometryType geomType)
Creates a new single symbol renderer from an SLD element.
Definition qgssinglesymbolrenderer.cpp:196
QgsSingleSymbolRenderer::create
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a new single symbol renderer from an XML element, using the supplied read/write context.
Definition qgssinglesymbolrenderer.cpp:156
QgsVectorLayer
Represents a vector layer which manages a vector based data sets.
Definition qgsvectorlayer.h:401
QgsVectorLayer::geometryType
Q_INVOKABLE Qgis::GeometryType geometryType() const
Returns point, line or polygon.
Definition qgsvectorlayer.cpp:815
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