QGIS API Documentation  3.24.2-Tisler (13c1a02865)
qgssymbollayerregistry.cpp
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1 /***************************************************************************
2  qgssymbollayerregistry.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 
16 #include "qgssymbollayerregistry.h"
17 
18 #include "qgsarrowsymbollayer.h"
19 #include "qgsellipsesymbollayer.h"
20 #include "qgsmarkersymbollayer.h"
21 #include "qgslinesymbollayer.h"
22 #include "qgsfillsymbollayer.h"
23 #include "qgsvectorfieldsymbollayer.h"
24 #include "qgsmasksymbollayer.h"
25 #include "qgsgeometrygeneratorsymbollayer.h"
26 #include "qgsinterpolatedlinerenderer.h"
27 
28 QgsSymbolLayerRegistry::QgsSymbolLayerRegistry()
29 {
30  // init registry with known symbol layers
31  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "SimpleLine" ), QObject::tr( "Simple Line" ), Qgis::SymbolType::Line,
32  QgsSimpleLineSymbolLayer::create, QgsSimpleLineSymbolLayer::createFromSld ) );
33  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "MarkerLine" ), QObject::tr( "Marker Line" ), Qgis::SymbolType::Line,
34  QgsMarkerLineSymbolLayer::create, QgsMarkerLineSymbolLayer::createFromSld ) );
35  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "HashLine" ), QObject::tr( "Hashed Line" ), Qgis::SymbolType::Line,
36  QgsHashedLineSymbolLayer::create ) );
37  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "ArrowLine" ), QObject::tr( "Arrow" ), Qgis::SymbolType::Line,
38  QgsArrowSymbolLayer::create ) );
39  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "InterpolatedLine" ), QObject::tr( "Interpolated Line" ), Qgis::SymbolType::Line,
40  QgsInterpolatedLineSymbolLayer::create ) );
41  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "RasterLine" ), QObject::tr( "Raster Line" ), Qgis::SymbolType::Line,
42  QgsRasterLineSymbolLayer::create, nullptr, QgsRasterLineSymbolLayer::resolvePaths ) );
43  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "Lineburst" ), QObject::tr( "Lineburst" ), Qgis::SymbolType::Line,
44  QgsLineburstSymbolLayer::create ) );
45 
46  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "SimpleMarker" ), QObject::tr( "Simple Marker" ), Qgis::SymbolType::Marker,
47  QgsSimpleMarkerSymbolLayer::create, QgsSimpleMarkerSymbolLayer::createFromSld ) );
48  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "FilledMarker" ), QObject::tr( "Filled Marker" ), Qgis::SymbolType::Marker,
49  QgsFilledMarkerSymbolLayer::create ) );
50  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "SvgMarker" ), QObject::tr( "SVG Marker" ), Qgis::SymbolType::Marker,
51  QgsSvgMarkerSymbolLayer::create, QgsSvgMarkerSymbolLayer::createFromSld, QgsSvgMarkerSymbolLayer::resolvePaths ) );
52  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "RasterMarker" ), QObject::tr( "Raster Image Marker" ), Qgis::SymbolType::Marker,
53  QgsRasterMarkerSymbolLayer::create, nullptr, QgsRasterFillSymbolLayer::resolvePaths ) );
54  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "FontMarker" ), QObject::tr( "Font Marker" ), Qgis::SymbolType::Marker,
55  QgsFontMarkerSymbolLayer::create, QgsFontMarkerSymbolLayer::createFromSld, nullptr, nullptr, QgsFontMarkerSymbolLayer::resolveFonts ) );
56  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "EllipseMarker" ), QObject::tr( "Ellipse Marker" ), Qgis::SymbolType::Marker,
57  QgsEllipseSymbolLayer::create, QgsEllipseSymbolLayer::createFromSld ) );
58  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "VectorField" ), QObject::tr( "Vector Field Marker" ), Qgis::SymbolType::Marker,
59  QgsVectorFieldSymbolLayer::create ) );
60  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "MaskMarker" ), QObject::tr( "Mask" ), Qgis::SymbolType::Marker,
61  QgsMaskMarkerSymbolLayer::create ) );
62 
63  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "SimpleFill" ), QObject::tr( "Simple Fill" ), Qgis::SymbolType::Fill,
64  QgsSimpleFillSymbolLayer::create, QgsSimpleFillSymbolLayer::createFromSld ) );
65  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "GradientFill" ), QObject::tr( "Gradient Fill" ), Qgis::SymbolType::Fill,
66  QgsGradientFillSymbolLayer::create ) );
67  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "ShapeburstFill" ), QObject::tr( "Shapeburst Fill" ), Qgis::SymbolType::Fill,
68  QgsShapeburstFillSymbolLayer::create ) );
69  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "RasterFill" ), QObject::tr( "Raster Image Fill" ), Qgis::SymbolType::Fill,
70  QgsRasterFillSymbolLayer::create, nullptr, QgsRasterFillSymbolLayer::resolvePaths ) );
71  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "SVGFill" ), QObject::tr( "SVG Fill" ), Qgis::SymbolType::Fill,
72  QgsSVGFillSymbolLayer::create, QgsSVGFillSymbolLayer::createFromSld, QgsSVGFillSymbolLayer::resolvePaths ) );
73  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "CentroidFill" ), QObject::tr( "Centroid Fill" ), Qgis::SymbolType::Fill,
74  QgsCentroidFillSymbolLayer::create, QgsCentroidFillSymbolLayer::createFromSld ) );
75  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "RandomMarkerFill" ), QObject::tr( "Random Marker Fill" ), Qgis::SymbolType::Fill,
76  QgsRandomMarkerFillSymbolLayer::create ) );
77  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "LinePatternFill" ), QObject::tr( "Line Pattern Fill" ), Qgis::SymbolType::Fill,
78  QgsLinePatternFillSymbolLayer::create, QgsLinePatternFillSymbolLayer::createFromSld ) );
79  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "PointPatternFill" ), QObject::tr( "Point Pattern Fill" ), Qgis::SymbolType::Fill,
80  QgsPointPatternFillSymbolLayer::create, QgsPointPatternFillSymbolLayer::createFromSld ) );
81 
82  addSymbolLayerType( new QgsSymbolLayerMetadata( QStringLiteral( "GeometryGenerator" ), QObject::tr( "Geometry Generator" ), Qgis::SymbolType::Hybrid,
83  QgsGeometryGeneratorSymbolLayer::create ) );
84 }
85 
86 QgsSymbolLayerRegistry::~QgsSymbolLayerRegistry()
87 {
88  qDeleteAll( mMetadata );
89 }
90 
91 bool QgsSymbolLayerRegistry::addSymbolLayerType( QgsSymbolLayerAbstractMetadata *metadata )
92 {
93  if ( !metadata || mMetadata.contains( metadata->name() ) )
94  return false;
95 
96  mMetadata[metadata->name()] = metadata;
97  return true;
98 }
99 
100 bool QgsSymbolLayerRegistry::removeSymbolLayerType( QgsSymbolLayerAbstractMetadata *metadata )
101 {
102  if ( !metadata || !mMetadata.contains( metadata->name() ) )
103  return false;
104 
105  metadata = mMetadata.take( metadata->name() );
106  delete metadata;
107  return true;
108 }
109 
110 
111 QgsSymbolLayerAbstractMetadata *QgsSymbolLayerRegistry::symbolLayerMetadata( const QString &name ) const
112 {
113  return mMetadata.value( name );
114 }
115 
116 QgsSymbolLayer *QgsSymbolLayerRegistry::defaultSymbolLayer( Qgis::SymbolType type )
117 {
118  switch ( type )
119  {
120  case Qgis::SymbolType::Marker:
121  return QgsSimpleMarkerSymbolLayer::create();
122 
123  case Qgis::SymbolType::Line:
124  return QgsSimpleLineSymbolLayer::create();
125 
126  case Qgis::SymbolType::Fill:
127  return QgsSimpleFillSymbolLayer::create();
128 
129  case Qgis::SymbolType::Hybrid:
130  return nullptr;
131  }
132 
133  return nullptr;
134 }
135 
136 
137 QgsSymbolLayer *QgsSymbolLayerRegistry::createSymbolLayer( const QString &name, const QVariantMap &properties ) const
138 {
139  if ( !mMetadata.contains( name ) )
140  return nullptr;
141 
142  return mMetadata[name]->createSymbolLayer( properties );
143 }
144 
145 QgsSymbolLayer *QgsSymbolLayerRegistry::createSymbolLayerFromSld( const QString &name, QDomElement &element ) const
146 {
147  if ( !mMetadata.contains( name ) )
148  return nullptr;
149 
150  return mMetadata[name]->createSymbolLayerFromSld( element );
151 }
152 
153 void QgsSymbolLayerRegistry::resolvePaths( const QString &name, QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving ) const
154 {
155  if ( !mMetadata.contains( name ) )
156  return;
157 
158  mMetadata[name]->resolvePaths( properties, pathResolver, saving );
159 }
160 
161 void QgsSymbolLayerRegistry::resolveFonts( const QString &name, QVariantMap &properties, const QgsReadWriteContext &context ) const
162 {
163  if ( !mMetadata.contains( name ) )
164  return;
165 
166  mMetadata[name]->resolveFonts( properties, context );
167 }
168 
169 QStringList QgsSymbolLayerRegistry::symbolLayersForType( Qgis::SymbolType type )
170 {
171  QStringList lst;
172  QMap<QString, QgsSymbolLayerAbstractMetadata *>::ConstIterator it = mMetadata.constBegin();
173  for ( ; it != mMetadata.constEnd(); ++it )
174  {
175  if ( it.value()->type() == type || it.value()->type() == Qgis::SymbolType::Hybrid )
176  lst.append( it.key() );
177  }
178  return lst;
179 }
Qgis::SymbolType
SymbolType
Symbol types.
Definition: qgis.h:183
Qgis::SymbolType::Marker
@ Marker
Marker symbol.
Qgis::SymbolType::Line
@ Line
Line symbol.
Qgis::SymbolType::Fill
@ Fill
Fill symbol.
Qgis::SymbolType::Hybrid
@ Hybrid
Hybrid symbol.
QgsArrowSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Create a new QgsArrowSymbolLayer.
Definition: qgsarrowsymbollayer.cpp:43
QgsCentroidFillSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Definition: qgsfillsymbollayer.cpp:4571
QgsCentroidFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsCentroidFillSymbolLayer using the specified properties map containing symbol propert...
Definition: qgsfillsymbollayer.cpp:4363
QgsEllipseSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates the symbol layer.
Definition: qgsellipsesymbollayer.cpp:47
QgsEllipseSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Definition: qgsellipsesymbollayer.cpp:482
QgsFilledMarkerSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsFilledMarkerSymbolLayer.
Definition: qgsmarkersymbollayer.cpp:1731
QgsFontMarkerSymbolLayer::resolveFonts
static void resolveFonts(const QVariantMap &properties, const QgsReadWriteContext &context)
Resolves fonts from a properties map, raising warnings in the specified context if the required fonts...
Definition: qgsmarkersymbollayer.cpp:3698
QgsFontMarkerSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Creates a new QgsFontMarkerSymbolLayer from an SLD XML element.
Definition: qgsmarkersymbollayer.cpp:3652
QgsFontMarkerSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsFontMarkerSymbolLayer from a property map (see properties())
Definition: qgsmarkersymbollayer.cpp:3205
QgsGeometryGeneratorSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties)
Creates the symbol layer.
Definition: qgsgeometrygeneratorsymbollayer.cpp:29
QgsGradientFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsGradientFillSymbolLayer using the specified properties map containing symbol propert...
Definition: qgsfillsymbollayer.cpp:543
QgsHashedLineSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsHashedLineSymbolLayer, using the settings serialized in the properties map (correspo...
Definition: qgslinesymbollayer.cpp:2733
QgsInterpolatedLineSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties)
Creates the symbol layer.
Definition: qgsinterpolatedlinerenderer.cpp:822
QgsLinePatternFillSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Creates a new QgsLinePatternFillSymbolLayer from a SLD element.
Definition: qgsfillsymbollayer.cpp:3364
QgsLinePatternFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsLinePatternFillSymbolLayer from a properties map.
Definition: qgsfillsymbollayer.cpp:2617
QgsLineburstSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsLineburstSymbolLayer, using the settings serialized in the properties map (correspon...
Definition: qgslinesymbollayer.cpp:3547
QgsMarkerLineSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsMarkerLineSymbolLayer, using the settings serialized in the properties map (correspo...
Definition: qgslinesymbollayer.cpp:2409
QgsMarkerLineSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Creates a new QgsMarkerLineSymbolLayer from an SLD XML DOM element.
Definition: qgslinesymbollayer.cpp:2539
QgsMaskMarkerSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Create a new QgsMaskMarkerSymbolLayer.
Definition: qgsmasksymbollayer.cpp:48
QgsPathResolver
Resolves relative paths into absolute paths and vice versa.
Definition: qgspathresolver.h:32
QgsPointPatternFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsPointPatternFillSymbolLayer using the specified properties map containing symbol pro...
Definition: qgsfillsymbollayer.cpp:3529
QgsPointPatternFillSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Definition: qgsfillsymbollayer.cpp:4242
QgsRandomMarkerFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsRandomMarkerFillSymbolLayer using the specified properties map containing symbol pro...
Definition: qgsfillsymbollayer.cpp:4987
QgsRasterFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsRasterFillSymbolLayer from a properties map.
Definition: qgsfillsymbollayer.cpp:4686
QgsRasterFillSymbolLayer::resolvePaths
static void resolvePaths(QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving)
Turns relative paths in properties map to absolute when reading and vice versa when writing.
Definition: qgsfillsymbollayer.cpp:4747
QgsRasterLineSymbolLayer::resolvePaths
static void resolvePaths(QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving)
Turns relative paths in properties map to absolute when reading and vice versa when writing.
Definition: qgslinesymbollayer.cpp:3393
QgsRasterLineSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsRasterLineSymbolLayer, using the settings serialized in the properties map (correspo...
Definition: qgslinesymbollayer.cpp:3308
QgsRasterMarkerSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a raster marker symbol layer from a string map of properties.
Definition: qgsmarkersymbollayer.cpp:2789
QgsReadWriteContext
The class is used as a container of context for various read/write operations on other objects.
Definition: qgsreadwritecontext.h:35
QgsSVGFillSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Creates a new QgsSVGFillSymbolLayer from a SLD element.
Definition: qgsfillsymbollayer.cpp:2313
QgsSVGFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsSVGFillSymbolLayer from a properties map.
Definition: qgsfillsymbollayer.cpp:1904
QgsSVGFillSymbolLayer::resolvePaths
static void resolvePaths(QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving)
Turns relative paths in properties map to absolute when reading and vice versa when writing.
Definition: qgsfillsymbollayer.cpp:2012
QgsShapeburstFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsShapeburstFillSymbolLayer using the specified properties map containing symbol prope...
Definition: qgsfillsymbollayer.cpp:1047
QgsSimpleFillSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsSimpleFillSymbolLayer using the specified properties map containing symbol propertie...
Definition: qgsfillsymbollayer.cpp:171
QgsSimpleFillSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Definition: qgsfillsymbollayer.cpp:435
QgsSimpleLineSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsSimpleLineSymbolLayer, using the settings serialized in the properties map (correspo...
Definition: qgslinesymbollayer.cpp:97
QgsSimpleLineSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Creates a new QgsSimpleLineSymbolLayer from an SLD XML DOM element.
Definition: qgslinesymbollayer.cpp:618
QgsSimpleMarkerSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsSimpleMarkerSymbolLayer.
Definition: qgsmarkersymbollayer.cpp:851
QgsSimpleMarkerSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Creates a new QgsSimpleMarkerSymbolLayer from an SLD XML element.
Definition: qgsmarkersymbollayer.cpp:1363
QgsSvgMarkerSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates the symbol.
Definition: qgsmarkersymbollayer.cpp:1953
QgsSvgMarkerSymbolLayer::createFromSld
static QgsSymbolLayer * createFromSld(QDomElement &element)
Definition: qgsmarkersymbollayer.cpp:2525
QgsSvgMarkerSymbolLayer::resolvePaths
static void resolvePaths(QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving)
Turns relative paths in properties map to absolute when reading and vice versa when writing.
Definition: qgsmarkersymbollayer.cpp:2053
QgsSymbolLayerAbstractMetadata
Stores metadata about one symbol layer class.
Definition: qgssymbollayerregistry.h:37
QgsSymbolLayerMetadata
Convenience metadata class that uses static functions to create symbol layer and its widget.
Definition: qgssymbollayerregistry.h:111
QgsSymbolLayerRegistry::createSymbolLayerFromSld
QgsSymbolLayer * createSymbolLayerFromSld(const QString &name, QDomElement &element) const
create a new instance of symbol layer given symbol layer name and SLD
Definition: qgssymbollayerregistry.cpp:145
QgsSymbolLayerRegistry::addSymbolLayerType
bool addSymbolLayerType(QgsSymbolLayerAbstractMetadata *metadata)
Registers a new symbol layer type. Takes ownership of the metadata instance.
Definition: qgssymbollayerregistry.cpp:91
QgsSymbolLayerRegistry::symbolLayersForType
QStringList symbolLayersForType(Qgis::SymbolType type)
Returns a list of available symbol layers for a specified symbol type.
Definition: qgssymbollayerregistry.cpp:169
QgsSymbolLayerRegistry::createSymbolLayer
QgsSymbolLayer * createSymbolLayer(const QString &name, const QVariantMap &properties=QVariantMap()) const
create a new instance of symbol layer given symbol layer name and properties
Definition: qgssymbollayerregistry.cpp:137
QgsSymbolLayerRegistry::resolvePaths
void resolvePaths(const QString &name, QVariantMap &properties, const QgsPathResolver &pathResolver, bool saving) const
Resolve paths in properties of a particular symbol layer.
Definition: qgssymbollayerregistry.cpp:153
QgsSymbolLayerRegistry::resolveFonts
void resolveFonts(const QString &name, QVariantMap &properties, const QgsReadWriteContext &context) const
Resolve fonts from the properties of a particular symbol layer.
Definition: qgssymbollayerregistry.cpp:161
QgsSymbolLayerRegistry::symbolLayerMetadata
QgsSymbolLayerAbstractMetadata * symbolLayerMetadata(const QString &name) const
Returns metadata for specified symbol layer. Returns nullptr if not found.
Definition: qgssymbollayerregistry.cpp:111
QgsSymbolLayerRegistry::removeSymbolLayerType
bool removeSymbolLayerType(QgsSymbolLayerAbstractMetadata *metadata)
Removes a symbol layer type.
Definition: qgssymbollayerregistry.cpp:100
QgsSymbolLayerRegistry::defaultSymbolLayer
static QgsSymbolLayer * defaultSymbolLayer(Qgis::SymbolType type)
create a new instance of symbol layer for specified symbol type with default settings
Definition: qgssymbollayerregistry.cpp:116
QgsVectorFieldSymbolLayer::create
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates the symbol layer.
Definition: qgsvectorfieldsymbollayer.cpp:61
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