QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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qgslayerdefinition.cpp
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1/***************************************************************************
2 qgslayerdefinition.cpp
3 ---------------------
4 begin : January 2015
5 copyright : (C) 2015 by Nathan Woodrow
6 email : woodrow dot nathan 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 <QFileInfo>
16#include <QFile>
17#include <QDir>
18#include <QTextStream>
19
20#include "qgslayerdefinition.h"
21#include "qgslogger.h"
22#include "qgsmaplayer.h"
23#include "qgspathresolver.h"
24#include "qgspluginlayer.h"
26#include "qgsproject.h"
27#include "qgsrasterlayer.h"
28#include "qgsreadwritecontext.h"
29#include "qgsvectorlayer.h"
30#include "qgsvectortilelayer.h"
31#include "qgstiledscenelayer.h"
32#include "qgsapplication.h"
33#include "qgsmaplayerfactory.h"
34#include "qgsmeshlayer.h"
35#include "qgspointcloudlayer.h"
36#include "qgsfileutils.h"
37#include "qgsgrouplayer.h"
38#include "qgslayertreegroup.h"
39#include "qgslayertreelayer.h"
40
41bool QgsLayerDefinition::loadLayerDefinition( const QString &path, QgsProject *project, QgsLayerTreeGroup *rootGroup, QString &errorMessage )
42{
43 QFile file( path );
44 if ( !file.open( QIODevice::ReadOnly ) )
45 {
46 errorMessage = QStringLiteral( "Can not open file" );
47 return false;
48 }
49
50 QDomDocument doc;
51 QString message;
52 if ( !doc.setContent( &file, &message ) )
53 {
54 errorMessage = message;
55 return false;
56 }
57
58 const QFileInfo fileinfo( file );
59 QDir::setCurrent( fileinfo.absoluteDir().path() );
60
61 QgsReadWriteContext context;
62 context.setPathResolver( QgsPathResolver( path ) );
63 context.setProjectTranslator( project );
64
65 return loadLayerDefinition( doc, project, rootGroup, errorMessage, context );
66}
67
68bool QgsLayerDefinition::loadLayerDefinition( QDomDocument doc, QgsProject *project, QgsLayerTreeGroup *rootGroup, QString &errorMessage, QgsReadWriteContext &context )
69{
70 errorMessage.clear();
71
73
74 // reorder maplayer nodes based on dependencies
75 // dependencies have to be resolved before IDs get changed
76 const DependencySorter depSorter( doc );
77 if ( !depSorter.hasMissingDependency() )
78 {
79 const QVector<QDomNode> sortedLayerNodes = depSorter.sortedLayerNodes();
80 QVector<QDomNode> clonedSorted;
81 const auto constSortedLayerNodes = sortedLayerNodes;
82 for ( const QDomNode &node : constSortedLayerNodes )
83 {
84 clonedSorted << node.cloneNode();
85 }
86 QDomNode layersNode = doc.elementsByTagName( QStringLiteral( "maplayers" ) ).at( 0 );
87 // replace old children with new ones
88 QDomNode childNode = layersNode.firstChild();
89 for ( int i = 0; ! childNode.isNull(); i++ )
90 {
91 layersNode.replaceChild( clonedSorted.at( i ), childNode );
92 childNode = childNode.nextSibling();
93 }
94 }
95 // if a dependency is missing, we still try to load layers, since dependencies may already be loaded
96
97 // IDs of layers should be changed otherwise we may have more then one layer with the same id
98 // We have to replace the IDs before we load them because it's too late once they are loaded
99 const QDomNodeList treeLayerNodes = doc.elementsByTagName( QStringLiteral( "layer-tree-layer" ) );
100 for ( int i = 0; i < treeLayerNodes.length(); ++i )
101 {
102 const QDomNode treeLayerNode = treeLayerNodes.item( i );
103 QDomElement treeLayerElem = treeLayerNode.toElement();
104 const QString oldid = treeLayerElem.attribute( QStringLiteral( "id" ) );
105 const QString layername = treeLayerElem.attribute( QStringLiteral( "name" ) );
106 const QString newid = QgsMapLayer::generateId( layername );
107 treeLayerElem.setAttribute( QStringLiteral( "id" ), newid );
108
109 // Replace IDs for map layers
110 const QDomNodeList ids = doc.elementsByTagName( QStringLiteral( "id" ) );
111 QDomNode idnode = ids.at( 0 );
112 for ( int j = 0; ! idnode.isNull() ; ++j )
113 {
114 idnode = ids.at( j );
115 const QDomElement idElem = idnode.toElement();
116 if ( idElem.text() == oldid )
117 {
118 idElem.firstChild().setNodeValue( newid );
119 }
120 }
121
122 // change layer IDs for vector joins
123 const QDomNodeList vectorJoinNodes = doc.elementsByTagName( QStringLiteral( "join" ) ); // TODO: Find a better way of searching for vectorjoins, there might be other <join> elements within the project.
124 for ( int j = 0; j < vectorJoinNodes.size(); ++j )
125 {
126 const QDomNode joinNode = vectorJoinNodes.at( j );
127 const QDomElement joinElement = joinNode.toElement();
128 if ( joinElement.attribute( QStringLiteral( "joinLayerId" ) ) == oldid )
129 {
130 joinNode.toElement().setAttribute( QStringLiteral( "joinLayerId" ), newid );
131 }
132 }
133
134 // change IDs of dependencies
135 const QDomNodeList dataDeps = doc.elementsByTagName( QStringLiteral( "dataDependencies" ) );
136 for ( int i = 0; i < dataDeps.size(); i++ )
137 {
138 const QDomNodeList layers = dataDeps.at( i ).childNodes();
139 for ( int j = 0; j < layers.size(); j++ )
140 {
141 QDomElement elt = layers.at( j ).toElement();
142 if ( elt.attribute( QStringLiteral( "id" ) ) == oldid )
143 {
144 elt.setAttribute( QStringLiteral( "id" ), newid );
145 }
146 }
147 }
148
149 // Change IDs of widget config values
150 const QDomNodeList widgetConfig = doc.elementsByTagName( QStringLiteral( "editWidget" ) );
151 for ( int i = 0; i < widgetConfig.size(); i++ )
152 {
153 const QDomNodeList config = widgetConfig.at( i ).childNodes();
154 for ( int j = 0; j < config.size(); j++ )
155 {
156 const QDomNodeList optMap = config.at( j ).childNodes();
157 for ( int z = 0; z < optMap.size(); z++ )
158 {
159 const QDomNodeList opts = optMap.at( z ).childNodes();
160 for ( int k = 0; k < opts.size(); k++ )
161 {
162 QDomElement opt = opts.at( k ).toElement();
163 if ( opt.attribute( QStringLiteral( "value" ) ) == oldid )
164 {
165 opt.setAttribute( QStringLiteral( "value" ), newid );
166 }
167 }
168 }
169 }
170 }
171 }
172
173 QDomElement layerTreeElem = doc.documentElement().firstChildElement( QStringLiteral( "layer-tree-group" ) );
174 bool loadInLegend = true;
175 if ( !layerTreeElem.isNull() )
176 {
177 root->readChildrenFromXml( layerTreeElem, context );
178 loadInLegend = false;
179 }
180
181 const QList<QgsMapLayer *> layers = QgsLayerDefinition::loadLayerDefinitionLayersInternal( doc, context, errorMessage );
182
183 project->addMapLayers( layers, loadInLegend );
184
185 // Now that all layers are loaded, refresh the vectorjoins to get the joined fields
186 const auto constLayers = layers;
187 for ( QgsMapLayer *layer : constLayers )
188 {
189 layer->resolveReferences( project );
190 }
191
192 root->resolveReferences( project );
193
194 const QList<QgsLayerTreeNode *> nodes = root->children();
195 root->abandonChildren();
196 delete root;
197
198 rootGroup->insertChildNodes( -1, nodes );
199
200 return true;
201}
202
203bool QgsLayerDefinition::exportLayerDefinition( const QString &path, const QList<QgsLayerTreeNode *> &selectedTreeNodes, QString &errorMessage )
204{
205 return exportLayerDefinition( path, selectedTreeNodes, QgsProject::instance()->filePathStorage(), errorMessage );
206}
207
208bool QgsLayerDefinition::exportLayerDefinition( const QString &p, const QList<QgsLayerTreeNode *> &selectedTreeNodes, Qgis::FilePathType pathType, QString &errorMessage )
209{
210 const QString path = QgsFileUtils::ensureFileNameHasExtension( p, { QStringLiteral( "qlr" )} );
211
212 QFile file( path );
213 if ( !file.open( QFile::WriteOnly | QFile::Truncate ) )
214 {
215 errorMessage = file.errorString();
216 return false;
217 }
218
219 QgsReadWriteContext context;
220 switch ( pathType )
221 {
223 context.setPathResolver( QgsPathResolver( QString() ) );
224 break;
226 context.setPathResolver( QgsPathResolver( path ) );
227 break;
228 }
229
230 const QDomDocument doc( QStringLiteral( "qgis-layer-definition" ) );
231 if ( !exportLayerDefinition( doc, selectedTreeNodes, errorMessage, context ) )
232 return false;
233
234 QTextStream qlayerstream( &file );
235 doc.save( qlayerstream, 2 );
236 return true;
237}
238
239bool QgsLayerDefinition::exportLayerDefinition( QDomDocument doc, const QList<QgsLayerTreeNode *> &selectedTreeNodes, QString &errorMessage, const QgsReadWriteContext &context )
240{
241 Q_UNUSED( errorMessage )
242 QDomElement qgiselm = doc.createElement( QStringLiteral( "qlr" ) );
243 doc.appendChild( qgiselm );
244 const QList<QgsLayerTreeNode *> nodes = selectedTreeNodes;
246 const auto constNodes = nodes;
247 for ( QgsLayerTreeNode *node : constNodes )
248 {
249 QgsLayerTreeNode *newnode = node->clone();
250 root->addChildNode( newnode );
251 }
252 root->writeXml( qgiselm, context );
253
254 QDomElement layerselm = doc.createElement( QStringLiteral( "maplayers" ) );
255 const QList<QgsLayerTreeLayer *> layers = root->findLayers();
256 const auto constLayers = layers;
257 for ( QgsLayerTreeLayer *layer : constLayers )
258 {
259 if ( ! layer->layer() )
260 {
261 QgsDebugMsgLevel( QStringLiteral( "Not a valid map layer: skipping %1" ).arg( layer->name( ) ), 4 );
262 continue;
263 }
264 QDomElement layerelm = doc.createElement( QStringLiteral( "maplayer" ) );
265 layer->layer()->writeLayerXml( layerelm, doc, context );
266 layerselm.appendChild( layerelm );
267 }
268 qgiselm.appendChild( layerselm );
269 return true;
270}
271
272QDomDocument QgsLayerDefinition::exportLayerDefinitionLayers( const QList<QgsMapLayer *> &layers, const QgsReadWriteContext &context )
273{
274 QDomDocument doc( QStringLiteral( "qgis-layer-definition" ) );
275 QDomElement qgiselm = doc.createElement( QStringLiteral( "qlr" ) );
276 doc.appendChild( qgiselm );
277 QDomElement layerselm = doc.createElement( QStringLiteral( "maplayers" ) );
278 const auto constLayers = layers;
279 for ( QgsMapLayer *layer : constLayers )
280 {
281 QDomElement layerelm = doc.createElement( QStringLiteral( "maplayer" ) );
282 layer->writeLayerXml( layerelm, doc, context );
283 layerselm.appendChild( layerelm );
284 }
285 qgiselm.appendChild( layerselm );
286 return doc;
287}
288
289QList<QgsMapLayer *> QgsLayerDefinition::loadLayerDefinitionLayers( QDomDocument &document, QgsReadWriteContext &context )
290{
291 QString errorMessage;
292 return loadLayerDefinitionLayersInternal( document, context, errorMessage );
293}
294
295QList<QgsMapLayer *> QgsLayerDefinition::loadLayerDefinitionLayersInternal( QDomDocument &document, QgsReadWriteContext &context, QString &errorMessage )
296{
297 QList<QgsMapLayer *> layers;
298 QDomElement layerElem = document.documentElement().firstChildElement( QStringLiteral( "projectlayers" ) ).firstChildElement( QStringLiteral( "maplayer" ) );
299 // For QLR:
300 if ( layerElem.isNull() )
301 {
302 layerElem = document.documentElement().firstChildElement( QStringLiteral( "maplayers" ) ).firstChildElement( QStringLiteral( "maplayer" ) );
303 }
304
305 while ( ! layerElem.isNull() )
306 {
307 const QString type = layerElem.attribute( QStringLiteral( "type" ) );
308 QgsMapLayer *layer = nullptr;
309
310 bool ok = false;
311 const Qgis::LayerType layerType = QgsMapLayerFactory::typeFromString( type, ok );
312 if ( ok )
313 {
314 switch ( layerType )
315 {
317 layer = new QgsVectorLayer();
318 break;
319
321 layer = new QgsRasterLayer();
322 break;
323
325 {
326 const QString typeName = layerElem.attribute( QStringLiteral( "name" ) );
328 break;
329 }
330
332 layer = new QgsMeshLayer();
333 break;
334
336 layer = new QgsVectorTileLayer;
337 break;
338
340 layer = new QgsPointCloudLayer();
341 break;
342
344 layer = new QgsTiledSceneLayer;
345 break;
346
349 break;
350
352 break;
353 }
354 }
355
356 if ( layer )
357 {
358 // always add the layer, even if the source is invalid -- this allows users to fix the source
359 // at a later stage and still retain all the layer properties intact
360 layer->readLayerXml( layerElem, context );
361 layers << layer;
362 }
363 else
364 {
365 errorMessage = QObject::tr( "Unsupported layer type: %1" ).arg( type );
366 }
367 layerElem = layerElem.nextSiblingElement( QStringLiteral( "maplayer" ) );
368 }
369 return layers;
370}
371
372QList<QgsMapLayer *> QgsLayerDefinition::loadLayerDefinitionLayers( const QString &qlrfile )
373{
374 QFile file( qlrfile );
375 if ( !file.open( QIODevice::ReadOnly ) )
376 {
377 QgsDebugError( QStringLiteral( "Can't open file" ) );
378 return QList<QgsMapLayer *>();
379 }
380
381 QDomDocument doc;
382 if ( !doc.setContent( &file ) )
383 {
384 QgsDebugError( QStringLiteral( "Can't set content" ) );
385 return QList<QgsMapLayer *>();
386 }
387
388 QgsReadWriteContext context;
389 context.setPathResolver( QgsPathResolver( qlrfile ) );
390 //no project translator defined here
392}
393
394void QgsLayerDefinition::DependencySorter::init( const QDomDocument &doc )
395{
396 // Determine a loading order of layers based on a graph of dependencies
397 QMap< QString, QVector< QString > > dependencies;
398 QStringList sortedLayers;
399 QList< QPair<QString, QDomNode> > layersToSort;
400 QStringList layerIds;
401
402 QDomElement layerElem = doc.documentElement().firstChildElement( QStringLiteral( "projectlayers" ) ).firstChildElement( QStringLiteral( "maplayer" ) );
403 // For QLR:
404 if ( layerElem.isNull() )
405 {
406 layerElem = doc.documentElement().firstChildElement( QStringLiteral( "maplayers" ) ).firstChildElement( QStringLiteral( "maplayer" ) );
407 }
408 // For tests (I don't know if there is a real use case for such a document except for test_qgslayerdefinition.py)
409 if ( layerElem.isNull() )
410 {
411 layerElem = doc.documentElement().firstChildElement( QStringLiteral( "maplayer" ) );
412 }
413
414 const QDomElement &firstElement { layerElem };
415
416 QVector<QString> deps; //avoid expensive allocation for list for every iteration
417 while ( !layerElem.isNull() )
418 {
419 deps.resize( 0 ); // preserve capacity - don't use clear
420
421 const QString id = layerElem.namedItem( QStringLiteral( "id" ) ).toElement().text();
422 layerIds << id;
423
424 // dependencies for this layer
425 const QDomElement layerDependenciesElem = layerElem.firstChildElement( QStringLiteral( "layerDependencies" ) );
426 if ( !layerDependenciesElem.isNull() )
427 {
428 const QDomNodeList dependencyList = layerDependenciesElem.elementsByTagName( QStringLiteral( "layer" ) );
429 for ( int j = 0; j < dependencyList.size(); ++j )
430 {
431 const QDomElement depElem = dependencyList.at( j ).toElement();
432 deps << depElem.attribute( QStringLiteral( "id" ) );
433 }
434 }
435 dependencies[id] = deps;
436
437 if ( deps.empty() )
438 {
439 sortedLayers << id;
440 mSortedLayerNodes << layerElem;
441 mSortedLayerIds << id;
442 }
443 else
444 {
445 layersToSort << qMakePair( id, layerElem );
446 mDependentLayerIds.insert( id );
447 }
448 layerElem = layerElem.nextSiblingElement( );
449 }
450
451 // check that all dependencies are present
452 const auto constDependencies = dependencies;
453 for ( const QVector< QString > &ids : constDependencies )
454 {
455 const auto constIds = ids;
456 for ( const QString &depId : constIds )
457 {
458 if ( !dependencies.contains( depId ) )
459 {
460 // some dependencies are not satisfied
461 mHasMissingDependency = true;
462 layerElem = firstElement;
463 while ( ! layerElem.isNull() )
464 {
465 mSortedLayerNodes << layerElem;
466 layerElem = layerElem.nextSiblingElement( );
467 }
468 mSortedLayerIds = layerIds;
469 return;
470 }
471 }
472 }
473
474 // cycles should be very rare, since layers with cyclic dependencies may only be created by
475 // manually modifying the project file
476 mHasCycle = false;
477
478 while ( !layersToSort.empty() && !mHasCycle )
479 {
480 QList< QPair<QString, QDomNode> >::iterator it = layersToSort.begin();
481 while ( it != layersToSort.end() )
482 {
483 const QString idToSort = it->first;
484 const QDomNode node = it->second;
485 mHasCycle = true;
486 bool resolved = true;
487 const auto deps { dependencies.value( idToSort ) };
488 for ( const QString &dep : deps )
489 {
490 if ( !sortedLayers.contains( dep ) )
491 {
492 resolved = false;
493 break;
494 }
495 }
496 if ( resolved ) // dependencies for this layer are resolved
497 {
498 sortedLayers << idToSort;
499 mSortedLayerNodes << node;
500 mSortedLayerIds << idToSort;
501 it = layersToSort.erase( it ); // erase and go to the next
502 mHasCycle = false;
503 }
504 else
505 {
506 ++it;
507 }
508 }
509 }
510}
511
513 : mHasCycle( false )
514 , mHasMissingDependency( false )
515{
516 init( doc );
517}
518
520 : mHasCycle( false )
521 , mHasMissingDependency( false )
522{
523 QString qgsProjectFile = fileName;
524 QgsProjectArchive archive;
525 if ( fileName.endsWith( QLatin1String( ".qgz" ), Qt::CaseInsensitive ) )
526 {
527 archive.unzip( fileName );
528 qgsProjectFile = archive.projectFile();
529 }
530
531 QDomDocument doc;
532 QFile pFile( qgsProjectFile );
533 ( void )pFile.open( QIODevice::ReadOnly );
534 ( void )doc.setContent( &pFile );
535 init( doc );
536}
537
539{
540 return mDependentLayerIds.contains( layerId );
541}
542
543
FilePathType
File path types.
Definition qgis.h:1185
@ Relative
Relative path.
@ Absolute
Absolute path.
LayerType
Types of layers that can be added to a map.
Definition qgis.h:114
@ Group
Composite group layer. Added in QGIS 3.24.
@ Plugin
Plugin based layer.
@ TiledScene
Tiled scene layer. Added in QGIS 3.34.
@ Annotation
Contains freeform, georeferenced annotations. Added in QGIS 3.16.
@ Vector
Vector layer.
@ VectorTile
Vector tile layer. Added in QGIS 3.14.
@ Mesh
Mesh layer. Added in QGIS 3.2.
@ Raster
Raster layer.
@ PointCloud
Point cloud layer. Added in QGIS 3.18.
static QgsPluginLayerRegistry * pluginLayerRegistry()
Returns the application's plugin layer registry, used for managing plugin layer types.
Contains information about the context in which a coordinate transform is executed.
static QString ensureFileNameHasExtension(const QString &fileName, const QStringList &extensions)
Ensures that a fileName ends with an extension from the provided list of extensions.
A map layer which consists of a set of child layers, where all component layers are rendered as a sin...
Class used to work with layer dependencies stored in a XML project or layer definition file.
bool hasMissingDependency() const
Whether some dependency is missing.
bool isLayerDependent(const QString &layerId) const
Returns whether the layer associated with thelayerId is dependent from another layer.
DependencySorter(const QDomDocument &doc)
Constructor.
QVector< QDomNode > sortedLayerNodes() const
Gets the layer nodes in an order where they can be loaded incrementally without dependency break.
static bool loadLayerDefinition(const QString &path, QgsProject *project, QgsLayerTreeGroup *rootGroup, QString &errorMessage)
Loads the QLR at path into QGIS. New layers are added to given project into layer tree specified by r...
static QDomDocument exportLayerDefinitionLayers(const QList< QgsMapLayer * > &layers, const QgsReadWriteContext &context)
Returns the given layer as a layer definition document Layer definitions store the data source as wel...
static QList< QgsMapLayer * > loadLayerDefinitionLayers(QDomDocument &document, QgsReadWriteContext &context)
Creates new layers from a layer definition document.
static bool exportLayerDefinition(const QString &path, const QList< QgsLayerTreeNode * > &selectedTreeNodes, QString &errorMessage)
Exports the selected layer tree nodes to a QLR file.
Layer tree group node serves as a container for layers and further groups.
void resolveReferences(const QgsProject *project, bool looseMatching=false) override
Calls resolveReferences() on child tree nodes.
void writeXml(QDomElement &parentElement, const QgsReadWriteContext &context) override
Write group (tree) as XML element <layer-tree-group> and add it to the given parent element.
void addChildNode(QgsLayerTreeNode *node)
Append an existing node.
void insertChildNodes(int index, const QList< QgsLayerTreeNode * > &nodes)
Insert existing nodes at specified position.
void readChildrenFromXml(QDomElement &element, const QgsReadWriteContext &context)
Read children from XML and append them to the group.
QList< QgsLayerTreeLayer * > findLayers() const
Find all layer nodes.
Layer tree node points to a map layer.
This class is a base class for nodes in a layer tree.
QList< QgsLayerTreeNode * > abandonChildren()
Removes the childrens, disconnect all the forwarded and external signals and sets their parent to nul...
QList< QgsLayerTreeNode * > children()
Gets list of children of the node. Children are owned by the parent.
virtual QgsLayerTreeNode * clone() const =0
Create a copy of the node. Returns new instance.
static Qgis::LayerType typeFromString(const QString &string, bool &ok)
Returns the map layer type corresponding a string value.
Base class for all map layer types.
Definition qgsmaplayer.h:74
static QString generateId(const QString &layerName)
Generates an unique identifier for this layer, the generate ID is prefixed by layerName.
bool readLayerXml(const QDomElement &layerElement, QgsReadWriteContext &context, QgsMapLayer::ReadFlags flags=QgsMapLayer::ReadFlags(), QgsDataProvider *preloadedProvider=nullptr)
Sets state from DOM document.
Represents a mesh layer supporting display of data on structured or unstructured meshes.
Resolves relative paths into absolute paths and vice versa.
QgsPluginLayer * createLayer(const QString &typeName, const QString &uri=QString())
Returns new layer if corresponding plugin has been found else returns nullptr.
Represents a map layer supporting display of point clouds.
Class allowing to manage the zip/unzip actions on project file.
Definition qgsarchive.h:122
QString projectFile() const
Returns the current .qgs project file or an empty string if there's none.
bool unzip(const QString &zipFilename) override
Clear the current content of this archive and unzip.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
Definition qgsproject.h:107
QList< QgsMapLayer * > addMapLayers(const QList< QgsMapLayer * > &mapLayers, bool addToLegend=true, bool takeOwnership=true)
Add a list of layers to the map of loaded layers.
static QgsProject * instance()
Returns the QgsProject singleton instance.
Represents a raster layer.
The class is used as a container of context for various read/write operations on other objects.
void setProjectTranslator(QgsProjectTranslator *projectTranslator)
Sets the project translator.
void setPathResolver(const QgsPathResolver &resolver)
Sets up path resolver for conversion between relative and absolute paths.
Represents a map layer supporting display of tiled scene objects.
Represents a vector layer which manages a vector based data sets.
Implements a map layer that is dedicated to rendering of vector tiles.
#define QgsDebugMsgLevel(str, level)
Definition qgslogger.h:39
#define QgsDebugError(str)
Definition qgslogger.h:38
const QString & typeName
Setting options for loading group layers.