QGIS API Documentation 3.39.0-Master (bca3cdb6021)
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qgsvectortilelayer.cpp
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1/***************************************************************************
2 qgsvectortilelayer.cpp
3 --------------------------------------
4 Date : March 2020
5 Copyright : (C) 2020 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 "qgsvectortilelayer.h"
17
18#include "qgslogger.h"
23#include "qgsvectortileloader.h"
24#include "qgsvectortileutils.h"
26#include "qgsdatasourceuri.h"
30#include "qgsjsonutils.h"
31#include "qgspainting.h"
32#include "qgsmaplayerfactory.h"
33#include "qgsselectioncontext.h"
34#include "qgsgeometryengine.h"
36#include "qgsthreadingutils.h"
37#include "qgsproviderregistry.h"
39
40#include <QUrl>
41#include <QUrlQuery>
42
43QgsVectorTileLayer::QgsVectorTileLayer( const QString &uri, const QString &baseName, const LayerOptions &options )
44 : QgsMapLayer( Qgis::LayerType::VectorTile, baseName )
45 , mTransformContext( options.transformContext )
46{
47 mDataSource = uri;
48
49 if ( !uri.isEmpty() )
50 setValid( loadDataSource() );
51
52 // set a default renderer
56
57 connect( this, &QgsVectorTileLayer::selectionChanged, this, [this] { triggerRepaint(); } );
58}
59
60void QgsVectorTileLayer::setDataSourcePrivate( const QString &dataSource, const QString &baseName, const QString &, const QgsDataProvider::ProviderOptions &, Qgis::DataProviderReadFlags )
61{
63
64 mDataSource = dataSource;
65 mLayerName = baseName;
66 mDataProvider.reset();
67
68 setValid( loadDataSource() );
69}
70
71bool QgsVectorTileLayer::loadDataSource()
72{
74
75 QgsDataSourceUri dsUri;
77
78 setCrs( QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:3857" ) ) );
79
80 const QgsDataProvider::ProviderOptions providerOptions { mTransformContext };
82
83 mSourceType = dsUri.param( QStringLiteral( "type" ) );
84 QString providerKey;
85 if ( mSourceType == QLatin1String( "xyz" ) && dsUri.param( QStringLiteral( "serviceType" ) ) == QLatin1String( "arcgis" ) )
86 {
87 providerKey = QStringLiteral( "arcgisvectortileservice" );
88 }
89 else if ( mSourceType == QLatin1String( "xyz" ) )
90 {
91 providerKey = QStringLiteral( "xyzvectortiles" );
92 }
93 else if ( mSourceType == QLatin1String( "mbtiles" ) )
94 {
95 providerKey = QStringLiteral( "mbtilesvectortiles" );
96 }
97 else if ( mSourceType == QLatin1String( "vtpk" ) )
98 {
99 providerKey = QStringLiteral( "vtpkvectortiles" );
100 }
101 else
102 {
103 QgsDebugError( QStringLiteral( "Unknown source type: " ) + mSourceType );
104 return false;
105 }
106
107 mDataProvider.reset( qobject_cast<QgsVectorTileDataProvider *>( QgsProviderRegistry::instance()->createProvider( providerKey, mDataSource, providerOptions, flags ) ) );
108 mProviderKey = mDataProvider->name();
109
110 if ( mDataProvider )
111 {
112 mMatrixSet = qgis::down_cast< QgsVectorTileDataProvider * >( mDataProvider.get() )->tileMatrixSet();
113 setCrs( mDataProvider->crs() );
114 setExtent( mDataProvider->extent() );
115 }
116
117 return mDataProvider && mDataProvider->isValid();
118}
119
121
123{
125
126 const QgsVectorTileLayer::LayerOptions options( mTransformContext );
127 QgsVectorTileLayer *layer = new QgsVectorTileLayer( source(), name(), options );
128 layer->setRenderer( renderer() ? renderer()->clone() : nullptr );
129 layer->setLabeling( labeling() ? labeling()->clone() : nullptr );
130 return layer;
131}
132
139
141{
143
144 return mDataProvider.get();
145}
146
153
154bool QgsVectorTileLayer::readXml( const QDomNode &layerNode, QgsReadWriteContext &context )
155{
157
158 setValid( loadDataSource() );
159
160 if ( !mDataProvider || !( qobject_cast< QgsVectorTileDataProvider * >( mDataProvider.get() )->providerFlags() & Qgis::VectorTileProviderFlag::AlwaysUseTileMatrixSetFromProvider ) )
161 {
162 const QDomElement matrixSetElement = layerNode.firstChildElement( QStringLiteral( "matrixSet" ) );
163 if ( !matrixSetElement.isNull() )
164 {
165 mMatrixSet.readXml( matrixSetElement, context );
166 }
167 }
168 setCrs( mMatrixSet.crs() );
169
170 QString errorMsg;
171 if ( !readSymbology( layerNode, errorMsg, context ) )
172 return false;
173
174 readStyleManager( layerNode );
175 return true;
176}
177
178bool QgsVectorTileLayer::writeXml( QDomNode &layerNode, QDomDocument &doc, const QgsReadWriteContext &context ) const
179{
181
182 QDomElement mapLayerNode = layerNode.toElement();
183 mapLayerNode.setAttribute( QStringLiteral( "type" ), QgsMapLayerFactory::typeToString( Qgis::LayerType::VectorTile ) );
184
185 if ( !mDataProvider || !( qobject_cast< QgsVectorTileDataProvider * >( mDataProvider.get() )->providerFlags() & Qgis::VectorTileProviderFlag::AlwaysUseTileMatrixSetFromProvider ) )
186 {
187 mapLayerNode.appendChild( mMatrixSet.writeXml( doc, context ) );
188 }
189
190 // add provider node
191 if ( mDataProvider )
192 {
193 QDomElement provider = doc.createElement( QStringLiteral( "provider" ) );
194 const QDomText providerText = doc.createTextNode( providerType() );
195 provider.appendChild( providerText );
196 mapLayerNode.appendChild( provider );
197 }
198
199 writeStyleManager( layerNode, doc );
200
201 QString errorMsg;
202 return writeSymbology( layerNode, doc, errorMsg, context );
203}
204
205bool QgsVectorTileLayer::readSymbology( const QDomNode &node, QString &errorMessage, QgsReadWriteContext &context, QgsMapLayer::StyleCategories categories )
206{
208
209 const QDomElement elem = node.toElement();
210
211 readCommonStyle( elem, context, categories );
212
213 const QDomElement elemRenderer = elem.firstChildElement( QStringLiteral( "renderer" ) );
214 if ( elemRenderer.isNull() )
215 {
216 errorMessage = tr( "Missing <renderer> tag" );
217 return false;
218 }
219 const QString rendererType = elemRenderer.attribute( QStringLiteral( "type" ) );
220
221 if ( categories.testFlag( Symbology ) )
222 {
223 QgsVectorTileRenderer *r = nullptr;
224 if ( rendererType == QLatin1String( "basic" ) )
226 else
227 {
228 errorMessage = tr( "Unknown renderer type: " ) + rendererType;
229 return false;
230 }
231
232 r->readXml( elemRenderer, context );
233 setRenderer( r );
234 }
235
236 if ( categories.testFlag( Labeling ) )
237 {
238 setLabeling( nullptr );
239 const QDomElement elemLabeling = elem.firstChildElement( QStringLiteral( "labeling" ) );
240 if ( !elemLabeling.isNull() )
241 {
242 const QString labelingType = elemLabeling.attribute( QStringLiteral( "type" ) );
244 if ( labelingType == QLatin1String( "basic" ) )
246 else
247 {
248 errorMessage = tr( "Unknown labeling type: " ) + rendererType;
249 }
250
251 if ( elemLabeling.hasAttribute( QStringLiteral( "labelsEnabled" ) ) )
252 mLabelsEnabled = elemLabeling.attribute( QStringLiteral( "labelsEnabled" ) ).toInt();
253 else
254 mLabelsEnabled = true;
255
256 if ( labeling )
257 {
258 labeling->readXml( elemLabeling, context );
260 }
261 }
262 }
263
264 if ( categories.testFlag( Symbology ) )
265 {
266 // get and set the blend mode if it exists
267 const QDomNode blendModeNode = node.namedItem( QStringLiteral( "blendMode" ) );
268 if ( !blendModeNode.isNull() )
269 {
270 const QDomElement e = blendModeNode.toElement();
271 setBlendMode( QgsPainting::getCompositionMode( static_cast< Qgis::BlendMode >( e.text().toInt() ) ) );
272 }
273 }
274
275 // get and set the layer transparency
276 if ( categories.testFlag( Rendering ) )
277 {
278 const QDomNode layerOpacityNode = node.namedItem( QStringLiteral( "layerOpacity" ) );
279 if ( !layerOpacityNode.isNull() )
280 {
281 const QDomElement e = layerOpacityNode.toElement();
282 setOpacity( e.text().toDouble() );
283 }
284 }
285
286 return true;
287}
288
289bool QgsVectorTileLayer::writeSymbology( QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsReadWriteContext &context, QgsMapLayer::StyleCategories categories ) const
290{
292
293 Q_UNUSED( errorMessage )
294 QDomElement elem = node.toElement();
295
296 writeCommonStyle( elem, doc, context, categories );
297
298 if ( mRenderer )
299 {
300 QDomElement elemRenderer = doc.createElement( QStringLiteral( "renderer" ) );
301 elemRenderer.setAttribute( QStringLiteral( "type" ), mRenderer->type() );
302 if ( categories.testFlag( Symbology ) )
303 {
304 mRenderer->writeXml( elemRenderer, context );
305 }
306 elem.appendChild( elemRenderer );
307 }
308
309 if ( mLabeling && categories.testFlag( Labeling ) )
310 {
311 QDomElement elemLabeling = doc.createElement( QStringLiteral( "labeling" ) );
312 elemLabeling.setAttribute( QStringLiteral( "type" ), mLabeling->type() );
313 elemLabeling.setAttribute( QStringLiteral( "labelsEnabled" ), mLabelsEnabled ? QStringLiteral( "1" ) : QStringLiteral( "0" ) );
314 mLabeling->writeXml( elemLabeling, context );
315 elem.appendChild( elemLabeling );
316 }
317
318 if ( categories.testFlag( Symbology ) )
319 {
320 // add the blend mode field
321 QDomElement blendModeElem = doc.createElement( QStringLiteral( "blendMode" ) );
322 const QDomText blendModeText = doc.createTextNode( QString::number( static_cast< int >( QgsPainting::getBlendModeEnum( blendMode() ) ) ) );
323 blendModeElem.appendChild( blendModeText );
324 node.appendChild( blendModeElem );
325 }
326
327 // add the layer opacity
328 if ( categories.testFlag( Rendering ) )
329 {
330 QDomElement layerOpacityElem = doc.createElement( QStringLiteral( "layerOpacity" ) );
331 const QDomText layerOpacityText = doc.createTextNode( QString::number( opacity() ) );
332 layerOpacityElem.appendChild( layerOpacityText );
333 node.appendChild( layerOpacityElem );
334 }
335
336 return true;
337}
338
340{
342
343 if ( mDataProvider )
344 mDataProvider->setTransformContext( transformContext );
345
346 mTransformContext = transformContext;
348}
349
350QString QgsVectorTileLayer::loadDefaultStyle( bool &resultFlag )
351{
353
354 QString error;
355 QStringList warnings;
356 resultFlag = loadDefaultStyle( error, warnings );
357 return error;
358}
359
361{
363
365 if ( mSourceType == QLatin1String( "xyz" ) )
366 {
367 // always consider xyz vector tiles as basemap layers
369 }
370 else
371 {
372 // TODO when should we consider mbtiles layers as basemap layers? potentially if their extent is "large"?
373 }
374
375 return res;
376}
377
378bool QgsVectorTileLayer::loadDefaultStyle( QString &error, QStringList &warnings )
379{
381
382 return loadDefaultStyleAndSubLayersPrivate( error, warnings, nullptr );
383}
384
385bool QgsVectorTileLayer::loadDefaultStyleAndSubLayers( QString &error, QStringList &warnings, QList<QgsMapLayer *> &subLayers )
386{
388
389 return loadDefaultStyleAndSubLayersPrivate( error, warnings, &subLayers );
390}
391
392bool QgsVectorTileLayer::loadDefaultStyleAndSubLayersPrivate( QString &error, QStringList &warnings, QList<QgsMapLayer *> *subLayers )
393{
395 QgsVectorTileDataProvider *vtProvider = qgis::down_cast< QgsVectorTileDataProvider *> ( mDataProvider.get() );
396 if ( !vtProvider )
397 return false;
398
399 QgsDataSourceUri dsUri;
400 dsUri.setEncodedUri( mDataSource );
401
402 QVariantMap styleDefinition;
404 QString styleUrl;
405 if ( !dsUri.param( QStringLiteral( "styleUrl" ) ).isEmpty() )
406 {
407 styleUrl = dsUri.param( QStringLiteral( "styleUrl" ) );
408 }
409 else
410 {
411 styleUrl = vtProvider->styleUrl();
412 }
413
414 styleDefinition = vtProvider->styleDefinition();
415 const QVariantMap spriteDefinition = vtProvider->spriteDefinition();
416 if ( !spriteDefinition.isEmpty() )
417 {
418 const QImage spriteImage = vtProvider->spriteImage();
419 context.setSprites( spriteImage, spriteDefinition );
420 }
421
422 if ( !styleDefinition.isEmpty() || !styleUrl.isEmpty() )
423 {
424 if ( styleDefinition.isEmpty() )
425 {
426 QNetworkRequest request = QNetworkRequest( QUrl( styleUrl ) );
427
428 QgsSetRequestInitiatorClass( request, QStringLiteral( "QgsVectorTileLayer" ) );
429
430 QgsBlockingNetworkRequest networkRequest;
431 switch ( networkRequest.get( request ) )
432 {
434 break;
435
439 error = QObject::tr( "Error retrieving default style" );
440 return false;
441 }
442
443 const QgsNetworkReplyContent content = networkRequest.reply();
444 styleDefinition = QgsJsonUtils::parseJson( content.content() ).toMap();
445 }
446
447 QgsVectorTileUtils::loadSprites( styleDefinition, context, styleUrl );
448 }
449
450 if ( !styleDefinition.isEmpty() )
451 {
452 // convert automatically from pixel sizes to millimeters, because pixel sizes
453 // are a VERY edge case in QGIS and don't play nice with hidpi map renders or print layouts
455 //assume source uses 96 dpi
456 context.setPixelSizeConversionFactor( 25.4 / 96.0 );
457
459 if ( converter.convert( styleDefinition, &context ) != QgsMapBoxGlStyleConverter::Success )
460 {
461 warnings = converter.warnings();
462 error = converter.errorMessage();
463 return false;
464 }
465
466 setRenderer( converter.renderer() );
467 setLabeling( converter.labeling() );
468 warnings = converter.warnings();
469
470 if ( subLayers )
471 {
472 *subLayers = converter.createSubLayers();
473 }
474
475 return true;
476 }
477 else
478 {
479 bool resultFlag = false;
480 error = QgsMapLayer::loadDefaultStyle( resultFlag );
481 return resultFlag;
482 }
483}
484
486{
488
489 resultFlag = false;
490 if ( !mDataProvider || !mDataProvider->isValid() )
491 return QString();
492
493 if ( qgis::down_cast< QgsVectorTileDataProvider * >( mDataProvider.get() )->providerCapabilities() & Qgis::VectorTileProviderCapability::ReadLayerMetadata )
494 {
495 setMetadata( mDataProvider->layerMetadata() );
496 }
497 else
498 {
500 }
501 resultFlag = true;
502 return QString();
503}
504
505QString QgsVectorTileLayer::encodedSource( const QString &source, const QgsReadWriteContext &context ) const
506{
508
510}
511
512QString QgsVectorTileLayer::decodedSource( const QString &source, const QString &provider, const QgsReadWriteContext &context ) const
513{
515
516 return QgsProviderRegistry::instance()->relativeToAbsoluteUri( provider, source, context );
517}
518
520{
522
523 const QgsLayerMetadataFormatter htmlFormatter( metadata() );
524
525 QString info = QStringLiteral( "<html><head></head>\n<body>\n" );
526
527 info += generalHtmlMetadata();
528
529 info += QStringLiteral( "<h1>" ) + tr( "Information from provider" ) + QStringLiteral( "</h1>\n<hr>\n" ) %
530 QStringLiteral( "<table class=\"list-view\">\n" );
531
532 info += QStringLiteral( "<tr><td class=\"highlight\">" ) % tr( "Source type" ) % QStringLiteral( "</td><td>" ) % sourceType() % QStringLiteral( "</td></tr>\n" );
533
534 info += QStringLiteral( "<tr><td class=\"highlight\">" ) % tr( "Zoom levels" ) % QStringLiteral( "</td><td>" ) % QStringLiteral( "%1 - %2" ).arg( sourceMinZoom() ).arg( sourceMaxZoom() ) % QStringLiteral( "</td></tr>\n" );
535
536 if ( mDataProvider )
537 info += qobject_cast< const QgsVectorTileDataProvider * >( mDataProvider.get() )->htmlMetadata();
538
539 info += QLatin1String( "</table>\n<br>" );
540
541 // CRS
542 info += crsHtmlMetadata();
543
544 // Identification section
545 info += QStringLiteral( "<h1>" ) % tr( "Identification" ) % QStringLiteral( "</h1>\n<hr>\n" ) %
546 htmlFormatter.identificationSectionHtml() %
547 QStringLiteral( "<br>\n" ) %
548
549 // extent section
550 QStringLiteral( "<h1>" ) % tr( "Extent" ) % QStringLiteral( "</h1>\n<hr>\n" ) %
551 htmlFormatter.extentSectionHtml( ) %
552 QStringLiteral( "<br>\n" ) %
553
554 // Start the Access section
555 QStringLiteral( "<h1>" ) % tr( "Access" ) % QStringLiteral( "</h1>\n<hr>\n" ) %
556 htmlFormatter.accessSectionHtml( ) %
557 QStringLiteral( "<br>\n" ) %
558
559
560 // Start the contacts section
561 QStringLiteral( "<h1>" ) % tr( "Contacts" ) % QStringLiteral( "</h1>\n<hr>\n" ) %
562 htmlFormatter.contactsSectionHtml( ) %
563 QStringLiteral( "<br><br>\n" ) %
564
565 // Start the links section
566 QStringLiteral( "<h1>" ) % tr( "References" ) % QStringLiteral( "</h1>\n<hr>\n" ) %
567 htmlFormatter.linksSectionHtml( ) %
568 QStringLiteral( "<br>\n" ) %
569
570 // Start the history section
571 QStringLiteral( "<h1>" ) % tr( "History" ) % QStringLiteral( "</h1>\n<hr>\n" ) %
572 htmlFormatter.historySectionHtml( ) %
573 QStringLiteral( "<br>\n" ) %
574
576
577 QStringLiteral( "\n</body>\n</html>\n" );
578
579 return info;
580}
581
583{
584 if ( QgsVectorTileDataProvider *vtProvider = qobject_cast< QgsVectorTileDataProvider * >( mDataProvider.get() ) )
585 return vtProvider->sourcePath();
586
587 return QString();
588}
589
591{
593
594 QgsVectorTileDataProvider *vtProvider = qobject_cast< QgsVectorTileDataProvider * >( mDataProvider.get() );
595 if ( !vtProvider )
596 return QgsVectorTileRawData();
597
598 return vtProvider->readTile( mMatrixSet, tileID );
599}
600
608
610{
612
613 return mRenderer.get();
614}
615
623
625{
627
628 return mLabeling.get();
629}
630
632{
633 // non fatal for now -- the "rasterize" processing algorithm is not thread safe and calls this
635
636 return mLabelsEnabled && static_cast< bool >( mLabeling );
637}
638
640{
642
643 mLabelsEnabled = enabled;
644}
645
647{
649
650 QList< QgsFeature > res;
651 res.reserve( mSelectedFeatures.size() );
652 for ( auto it = mSelectedFeatures.begin(); it != mSelectedFeatures.end(); ++it )
653 res.append( it.value() );
654
655 return res;
656}
657
659{
661
662 return mSelectedFeatures.size();
663}
664
666{
668
669 if ( !isInScaleRange( context.scale() ) )
670 {
671 QgsDebugMsgLevel( QStringLiteral( "Out of scale limits" ), 2 );
672 return;
673 }
674
675 QSet< QgsFeatureId > prevSelection;
676 prevSelection.reserve( mSelectedFeatures.size() );
677 for ( auto it = mSelectedFeatures.begin(); it != mSelectedFeatures.end(); ++it )
678 prevSelection.insert( it.key() );
679
681 {
682 switch ( behavior )
683 {
685 mSelectedFeatures.clear();
686 break;
687
691 break;
692 }
693 }
694
695 QgsGeometry selectionGeom = geometry;
696 bool isPointOrRectangle;
697 QgsPointXY point;
698 bool isSinglePoint = selectionGeom.type() == Qgis::GeometryType::Point;
699 if ( isSinglePoint )
700 {
701 isPointOrRectangle = true;
702 point = selectionGeom.asPoint();
704 }
705 else
706 {
707 // we have a polygon - maybe it is a rectangle - in such case we can avoid costly instersection tests later
708 isPointOrRectangle = QgsGeometry::fromRect( selectionGeom.boundingBox() ).isGeosEqual( selectionGeom );
709 }
710
711 auto addDerivedFields = []( QgsFeature & feature, const int tileZoom, const QString & layer )
712 {
713 QgsFields fields = feature.fields();
714 fields.append( QgsField( QStringLiteral( "tile_zoom" ), QMetaType::Type::Int ) );
715 fields.append( QgsField( QStringLiteral( "tile_layer" ), QMetaType::Type::QString ) );
716 QgsAttributes attributes = feature.attributes();
717 attributes << tileZoom << layer;
718 feature.setFields( fields );
719 feature.setAttributes( attributes );
720 };
721
722 std::unique_ptr<QgsGeometryEngine> selectionGeomPrepared;
723 QList< QgsFeature > singleSelectCandidates;
724
725 QgsRectangle r;
726 if ( isSinglePoint )
727 {
728 r = QgsRectangle( point.x(), point.y(), point.x(), point.y() );
729 }
730 else
731 {
732 r = selectionGeom.boundingBox();
733
734 if ( !isPointOrRectangle || relationship == Qgis::SelectGeometryRelationship::Within )
735 {
736 // use prepared geometry for faster intersection test
737 selectionGeomPrepared.reset( QgsGeometry::createGeometryEngine( selectionGeom.constGet() ) );
738 }
739 }
740
741 switch ( behavior )
742 {
745 {
746 // when adding to or setting a selection, we retrieve the tile data for the current scale
747 const int tileZoom = tileMatrixSet().scaleToZoomLevel( context.scale() );
748 const QgsTileMatrix tileMatrix = tileMatrixSet().tileMatrix( tileZoom );
749 const QgsTileRange tileRange = tileMatrix.tileRangeFromExtent( r );
750 const QVector< QgsTileXYZ> tiles = tileMatrixSet().tilesInRange( tileRange, tileZoom );
751
752 for ( const QgsTileXYZ &tileID : tiles )
753 {
754 const QgsVectorTileRawData data = getRawTile( tileID );
755 if ( data.data.isEmpty() )
756 continue; // failed to get data
757
759 if ( !decoder.decode( data ) )
760 continue; // failed to decode
761
762 QMap<QString, QgsFields> perLayerFields;
763 const QStringList layerNames = decoder.layers();
764 for ( const QString &layerName : layerNames )
765 {
766 QSet<QString> fieldNames = qgis::listToSet( decoder.layerFieldNames( layerName ) );
767 perLayerFields[layerName] = QgsVectorTileUtils::makeQgisFields( fieldNames );
768 }
769
770 const QgsVectorTileFeatures features = decoder.layerFeatures( perLayerFields, QgsCoordinateTransform() );
771 const QStringList featuresLayerNames = features.keys();
772 for ( const QString &layerName : featuresLayerNames )
773 {
774 const QgsFields fFields = perLayerFields[layerName];
775 const QVector<QgsFeature> &layerFeatures = features[layerName];
776 for ( const QgsFeature &f : layerFeatures )
777 {
778 if ( renderContext && mRenderer && !mRenderer->willRenderFeature( f, tileID.zoomLevel(), layerName, *renderContext ) )
779 continue;
780
781 if ( f.geometry().intersects( r ) )
782 {
783 bool selectFeature = true;
784 if ( selectionGeomPrepared )
785 {
786 switch ( relationship )
787 {
789 selectFeature = selectionGeomPrepared->intersects( f.geometry().constGet() );
790 break;
792 selectFeature = selectionGeomPrepared->contains( f.geometry().constGet() );
793 break;
794 }
795 }
796
797 if ( selectFeature )
798 {
799 QgsFeature derivedFeature = f;
800 addDerivedFields( derivedFeature, tileID.zoomLevel(), layerName );
802 singleSelectCandidates << derivedFeature;
803 else
804 mSelectedFeatures.insert( derivedFeature.id(), derivedFeature );
805 }
806 }
807 }
808 }
809 }
810 break;
811 }
812
815 {
816 // when removing from the selection, we instead just iterate over the current selection and test against the geometry
817 // we do this as we don't want the selection removal operation to depend at all on the tile zoom
818 for ( auto it = mSelectedFeatures.begin(); it != mSelectedFeatures.end(); )
819 {
820 bool matchesGeometry = false;
821 if ( selectionGeomPrepared )
822 {
823 switch ( relationship )
824 {
826 matchesGeometry = selectionGeomPrepared->intersects( it->geometry().constGet() );
827 break;
829 matchesGeometry = selectionGeomPrepared->contains( it->geometry().constGet() );
830 break;
831 }
832 }
833 else
834 {
835 switch ( relationship )
836 {
838 matchesGeometry = it->geometry().intersects( r );
839 break;
841 matchesGeometry = r.contains( it->geometry().boundingBox() );
842 break;
843 }
844 }
845
847 {
848 singleSelectCandidates << it.value();
849 it++;
850 }
851 else if ( ( matchesGeometry && behavior == Qgis::SelectBehavior::IntersectSelection )
852 || ( !matchesGeometry && behavior == Qgis::SelectBehavior::RemoveFromSelection ) )
853 {
854 it++;
855 }
856 else
857 {
858 it = mSelectedFeatures.erase( it );
859 }
860 }
861 break;
862 }
863 }
864
865 if ( ( flags & Qgis::SelectionFlag::SingleFeatureSelection ) && !singleSelectCandidates.empty() )
866 {
867 QgsFeature bestCandidate;
868
870 {
871 // when toggling a selection, we first check to see if we can remove a feature from the current selection -- that takes precedence over adding new features to the selection
872
873 // find smallest feature in the current selection
874 double smallestArea = std::numeric_limits< double >::max();
875 double smallestLength = std::numeric_limits< double >::max();
876 for ( const QgsFeature &candidate : std::as_const( singleSelectCandidates ) )
877 {
878 if ( !mSelectedFeatures.contains( candidate.id() ) )
879 continue;
880
881 switch ( candidate.geometry().type() )
882 {
884 bestCandidate = candidate;
885 break;
887 {
888 const double length = candidate.geometry().length();
889 if ( length < smallestLength && bestCandidate.geometry().type() != Qgis::GeometryType::Point )
890 {
891 bestCandidate = candidate;
892 smallestLength = length;
893 }
894 break;
895 }
897 {
898 const double area = candidate.geometry().area();
899 if ( area < smallestArea && bestCandidate.geometry().type() != Qgis::GeometryType::Point && bestCandidate.geometry().type() != Qgis::GeometryType::Line )
900 {
901 bestCandidate = candidate;
902 smallestArea = area;
903 }
904 break;
905 }
908 break;
909 }
910 }
911 }
912
913 if ( !bestCandidate.isValid() )
914 {
915 // find smallest feature (ie. pick the "hardest" one to click on)
916 double smallestArea = std::numeric_limits< double >::max();
917 double smallestLength = std::numeric_limits< double >::max();
918 for ( const QgsFeature &candidate : std::as_const( singleSelectCandidates ) )
919 {
920 switch ( candidate.geometry().type() )
921 {
923 bestCandidate = candidate;
924 break;
926 {
927 const double length = candidate.geometry().length();
928 if ( length < smallestLength && bestCandidate.geometry().type() != Qgis::GeometryType::Point )
929 {
930 bestCandidate = candidate;
931 smallestLength = length;
932 }
933 break;
934 }
936 {
937 const double area = candidate.geometry().area();
938 if ( area < smallestArea && bestCandidate.geometry().type() != Qgis::GeometryType::Point && bestCandidate.geometry().type() != Qgis::GeometryType::Line )
939 {
940 bestCandidate = candidate;
941 smallestArea = area;
942 }
943 break;
944 }
947 break;
948 }
949 }
950 }
951
953 {
954 if ( prevSelection.contains( bestCandidate.id() ) )
955 mSelectedFeatures.remove( bestCandidate.id() );
956 else
957 mSelectedFeatures.insert( bestCandidate.id(), bestCandidate );
958 }
959 else
960 {
961 switch ( behavior )
962 {
965 mSelectedFeatures.insert( bestCandidate.id(), bestCandidate );
966 break;
967
969 {
970 if ( mSelectedFeatures.contains( bestCandidate.id() ) )
971 {
972 mSelectedFeatures.clear();
973 mSelectedFeatures.insert( bestCandidate.id(), bestCandidate );
974 }
975 else
976 {
977 mSelectedFeatures.clear();
978 }
979 break;
980 }
981
983 {
984 mSelectedFeatures.remove( bestCandidate.id() );
985 break;
986 }
987 }
988 }
989 }
990
991 QSet< QgsFeatureId > newSelection;
992 newSelection.reserve( mSelectedFeatures.size() );
993 for ( auto it = mSelectedFeatures.begin(); it != mSelectedFeatures.end(); ++it )
994 newSelection.insert( it.key() );
995
996 // signal
997 if ( prevSelection != newSelection )
998 emit selectionChanged();
999}
1000
1002{
1004
1005 if ( mSelectedFeatures.empty() )
1006 return;
1007
1008 mSelectedFeatures.clear();
1009 emit selectionChanged();
1010}
1011
1012
The Qgis class provides global constants for use throughout the application.
Definition qgis.h:54
@ IsBasemapLayer
Layer is considered a 'basemap' layer, and certain properties of the layer should be ignored when cal...
@ ReadLayerMetadata
Provider can read layer metadata from data store. See QgsDataProvider::layerMetadata()
@ AlwaysUseTileMatrixSetFromProvider
Vector tile layer must always use the tile matrix set from the data provider, and should never store,...
QFlags< SelectionFlag > SelectionFlags
Flags which control feature selection behavior.
Definition qgis.h:1654
BlendMode
Blending modes defining the available composition modes that can be used when painting.
Definition qgis.h:4566
@ Polygon
Polygons.
@ Unknown
Unknown types.
@ Null
No geometry.
QFlags< DataProviderReadFlag > DataProviderReadFlags
Flags which control data provider construction.
Definition qgis.h:450
@ VectorTile
Vector tile layer. Added in QGIS 3.14.
@ Millimeters
Millimeters.
@ ToggleSelection
Enables a "toggle" selection mode, where previously selected matching features will be deselected and...
@ SingleFeatureSelection
Select only a single feature, picking the "best" match for the selection geometry.
QFlags< MapLayerProperty > MapLayerProperties
Map layer properties.
Definition qgis.h:2118
SelectGeometryRelationship
Geometry relationship test to apply for selecting features.
Definition qgis.h:1632
@ Within
Select where features are within the reference geometry.
@ Intersect
Select where features intersect the reference geometry.
SelectBehavior
Specifies how a selection should be applied.
Definition qgis.h:1618
@ SetSelection
Set selection, removing any existing selection.
@ AddToSelection
Add selection to current selection.
@ IntersectSelection
Modify current selection to include only select features which match.
@ RemoveFromSelection
Remove from current selection.
A vector of attributes.
A thread safe class for performing blocking (sync) network requests, with full support for QGIS proxy...
ErrorCode get(QNetworkRequest &request, bool forceRefresh=false, QgsFeedback *feedback=nullptr, RequestFlags requestFlags=QgsBlockingNetworkRequest::RequestFlags())
Performs a "get" operation on the specified request.
@ NetworkError
A network error occurred.
@ ServerExceptionError
An exception was raised by the server.
@ NoError
No error was encountered.
@ TimeoutError
Timeout was reached before a reply was received.
QgsNetworkReplyContent reply() const
Returns the content of the network reply, after a get(), post(), head() or put() request has been mad...
This class represents a coordinate reference system (CRS).
Contains information about the context in which a coordinate transform is executed.
Class for doing transforms between two map coordinate systems.
Abstract base class for spatial data provider implementations.
Class for storing the component parts of a RDBMS data source URI (e.g.
void setEncodedUri(const QByteArray &uri)
Sets the complete encoded uri.
QString param(const QString &key) const
Returns a generic parameter value corresponding to the specified key.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition qgsfeature.h:58
QgsAttributes attributes
Definition qgsfeature.h:67
QgsFields fields
Definition qgsfeature.h:68
QgsFeatureId id
Definition qgsfeature.h:66
void setAttributes(const QgsAttributes &attrs)
Sets the feature's attributes.
void setFields(const QgsFields &fields, bool initAttributes=false)
Assigns a field map with the feature to allow attribute access by attribute name.
QgsGeometry geometry
Definition qgsfeature.h:69
bool isValid() const
Returns the validity of this feature.
Encapsulate a field in an attribute table or data source.
Definition qgsfield.h:53
Container of fields for a vector layer.
Definition qgsfields.h:46
bool append(const QgsField &field, Qgis::FieldOrigin origin=Qgis::FieldOrigin::Provider, int originIndex=-1)
Appends a field.
Definition qgsfields.cpp:69
A geometry is the spatial representation of a feature.
static QgsGeometry fromRect(const QgsRectangle &rect)
Creates a new geometry from a QgsRectangle.
double length() const
Returns the planar, 2-dimensional length of geometry.
const QgsAbstractGeometry * constGet() const
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.
QgsPointXY asPoint() const
Returns the contents of the geometry as a 2-dimensional point.
Qgis::GeometryType type
double area() const
Returns the planar, 2-dimensional area of the geometry.
QgsRectangle boundingBox() const
Returns the bounding box of the geometry.
static QgsGeometryEngine * createGeometryEngine(const QgsAbstractGeometry *geometry, double precision=0.0)
Creates and returns a new geometry engine representing the specified geometry using precision on a gr...
bool isGeosEqual(const QgsGeometry &) const
Compares the geometry with another geometry using GEOS.
static QVariant parseJson(const std::string &jsonString)
Converts JSON jsonString to a QVariant, in case of parsing error an invalid QVariant is returned and ...
Class for metadata formatter.
Context for a MapBox GL style conversion operation.
void setTargetUnit(Qgis::RenderUnit targetUnit)
Sets the target unit type.
void setPixelSizeConversionFactor(double sizeConversionFactor)
Sets the pixel size conversion factor, used to scale the original pixel sizes when converting styles.
void setSprites(const QImage &image, const QVariantMap &definitions)
Sets the sprite image and definitions JSON to use during conversion.
Handles conversion of MapBox GL styles to QGIS vector tile renderers and labeling settings.
QgsVectorTileRenderer * renderer() const
Returns a new instance of a vector tile renderer representing the converted style,...
QgsVectorTileLabeling * labeling() const
Returns a new instance of a vector tile labeling representing the converted style,...
Result convert(const QVariantMap &style, QgsMapBoxGlStyleConversionContext *context=nullptr)
Converts a JSON style map, and returns the resultant status of the conversion.
QList< QgsMapLayer * > createSubLayers() const
Returns a list of new map layers corresponding to sublayers of the style, e.g.
@ Success
Conversion was successful.
QString errorMessage() const
Returns a descriptive error message if an error was encountered during the style conversion,...
QStringList warnings() const
Returns a list of user-friendly warnings generated during the conversion, e.g.
static QString typeToString(Qgis::LayerType type)
Converts a map layer type to a string value.
Base class for utility classes that encapsulate information necessary for rendering of map layers.
Base class for all map layer types.
Definition qgsmaplayer.h:76
QString name
Definition qgsmaplayer.h:80
void readStyleManager(const QDomNode &layerNode)
Read style manager's configuration (if any). To be called by subclasses.
bool isInScaleRange(double scale) const
Tests whether the layer should be visible at the specified scale.
void writeStyleManager(QDomNode &layerNode, QDomDocument &doc) const
Write style manager's configuration (if exists). To be called by subclasses.
QString source() const
Returns the source for the layer.
QString providerType() const
Returns the provider type (provider key) for this layer.
void setBlendMode(QPainter::CompositionMode blendMode)
Set the blending mode used for rendering a layer.
QgsMapLayer::LayerFlags flags() const
Returns the flags for this layer.
virtual QString loadDefaultStyle(bool &resultFlag)
Retrieve the default style for this layer if one exists (either as a .qml file on disk or as a record...
QString mLayerName
Name of the layer - used for display.
void triggerRepaint(bool deferredUpdate=false)
Will advise the map canvas (and any other interested party) that this layer requires to be repainted.
QString crsHtmlMetadata() const
Returns a HTML fragment containing the layer's CRS metadata, for use in the htmlMetadata() method.
QgsLayerMetadata metadata
Definition qgsmaplayer.h:82
QPainter::CompositionMode blendMode() const
Returns the current blending mode for a layer.
virtual void setOpacity(double opacity)
Sets the opacity for the layer, where opacity is a value between 0 (totally transparent) and 1....
virtual void setMetadata(const QgsLayerMetadata &metadata)
Sets the layer's metadata store.
QFlags< StyleCategory > StyleCategories
QString mProviderKey
Data provider key (name of the data provider)
QgsCoordinateTransformContext transformContext() const
Returns the layer data provider coordinate transform context or a default transform context if the la...
virtual QgsError error() const
Gets current status error.
virtual QStringList subLayers() const
Returns the sublayers of this layer.
virtual void setExtent(const QgsRectangle &rect)
Sets the extent.
QString mDataSource
Data source description string, varies by layer type.
virtual QString loadDefaultMetadata(bool &resultFlag)
Retrieve the default metadata for this layer if one exists (either as a .qmd file on disk or as a rec...
void setValid(bool valid)
Sets whether layer is valid or not.
void readCommonStyle(const QDomElement &layerElement, const QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories)
Read style data common to all layer types.
double opacity
Definition qgsmaplayer.h:88
@ Symbology
Symbology.
@ Rendering
Rendering: scale visibility, simplify method, opacity.
@ Labeling
Labeling.
QString customPropertyHtmlMetadata() const
Returns an HTML fragment containing custom property information, for use in the htmlMetadata() method...
QString generalHtmlMetadata() const
Returns an HTML fragment containing general metadata information, for use in the htmlMetadata() metho...
void writeCommonStyle(QDomElement &layerElement, QDomDocument &document, const QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) const
Write style data common to all layer types.
void invalidateWgs84Extent()
Invalidates the WGS84 extent.
void setCrs(const QgsCoordinateReferenceSystem &srs, bool emitSignal=true)
Sets layer's spatial reference system.
Encapsulates a network reply within a container which is inexpensive to copy and safe to pass between...
QByteArray content() const
Returns the reply content.
static Qgis::BlendMode getBlendModeEnum(QPainter::CompositionMode blendMode)
Returns a Qgis::BlendMode corresponding to a QPainter::CompositionMode.
static QPainter::CompositionMode getCompositionMode(Qgis::BlendMode blendMode)
Returns a QPainter::CompositionMode corresponding to a Qgis::BlendMode.
A class to represent a 2D point.
Definition qgspointxy.h:60
double y
Definition qgspointxy.h:64
double x
Definition qgspointxy.h:63
QString absoluteToRelativeUri(const QString &providerKey, const QString &uri, const QgsReadWriteContext &context) const
Converts absolute path(s) to relative path(s) in the given provider-specific URI.
static QgsProviderRegistry * instance(const QString &pluginPath=QString())
Means of accessing canonical single instance.
QString relativeToAbsoluteUri(const QString &providerKey, const QString &uri, const QgsReadWriteContext &context) const
Converts relative path(s) to absolute path(s) in the given provider-specific URI.
The class is used as a container of context for various read/write operations on other objects.
A rectangle specified with double values.
bool contains(const QgsRectangle &rect) const
Returns true when rectangle contains other rectangle.
Contains information about the context of a rendering operation.
Encapsulates the context of a layer selection operation.
double scale() const
Returns the map scale at which the selection should occur.
virtual QDomElement writeXml(QDomDocument &document, const QgsReadWriteContext &context) const
Writes the set to an XML element.
Definition qgstiles.cpp:391
QgsCoordinateReferenceSystem crs() const
Returns the coordinate reference system associated with the tiles.
Definition qgstiles.cpp:218
QVector< QgsTileXYZ > tilesInRange(QgsTileRange range, int zoomLevel) const
Returns a list of tiles in the given tile range.
Definition qgstiles.cpp:428
QgsTileMatrix tileMatrix(int zoom) const
Returns the tile matrix corresponding to the specified zoom.
Definition qgstiles.cpp:156
virtual bool readXml(const QDomElement &element, QgsReadWriteContext &context)
Reads the set from an XML element.
Definition qgstiles.cpp:342
int scaleToZoomLevel(double scale, bool clamp=true) const
Finds the best fitting (integer) zoom level given a map scale denominator.
Definition qgstiles.cpp:283
Defines a matrix of tiles for a single zoom level: it is defined by its size (width *.
Definition qgstiles.h:136
QgsTileRange tileRangeFromExtent(const QgsRectangle &mExtent) const
Returns tile range that fully covers the given extent.
Definition qgstiles.cpp:97
Range of tiles in a tile matrix to be rendered.
Definition qgstiles.h:99
Stores coordinates of a tile in a tile matrix set.
Definition qgstiles.h:40
Basic labeling configuration for vector tile layers.
The default vector tile renderer implementation.
static QList< QgsVectorTileBasicRendererStyle > simpleStyleWithRandomColors()
Returns a list of styles to render all layers, using random colors.
Base class for vector tile layer data providers.
Base class for labeling configuration classes for vector tile layers.
virtual void readXml(const QDomElement &elem, const QgsReadWriteContext &context)=0
Reads labeling properties from given XML element.
virtual QgsVectorTileLabeling * clone() const =0SIP_FACTORY
Returns a new copy of the object.
This class provides map rendering functionality for vector tile layers.
Implements a map layer that is dedicated to rendering of vector tiles.
QgsVectorTileLayer(const QString &path=QString(), const QString &baseName=QString(), const QgsVectorTileLayer::LayerOptions &options=QgsVectorTileLayer::LayerOptions())
Constructs a new vector tile layer.
bool readXml(const QDomNode &layerNode, QgsReadWriteContext &context) override
Called by readLayerXML(), used by children to read state specific to them from project files.
bool writeSymbology(QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) const override
Write the style for the layer into the document provided.
void setRenderer(QgsVectorTileRenderer *r)
Sets renderer for the map layer.
bool loadDefaultStyleAndSubLayers(QString &error, QStringList &warnings, QList< QgsMapLayer * > &subLayers)
Loads the default style for the layer, and returns true if the style was successfully loaded.
QString decodedSource(const QString &source, const QString &provider, const QgsReadWriteContext &context) const FINAL
Called by readLayerXML(), used by derived classes to decode provider's specific data source from proj...
QString sourceType() const
Returns type of the data source.
void setLabelsEnabled(bool enabled)
Sets whether labels should be enabled for the layer.
bool writeXml(QDomNode &layerNode, QDomDocument &doc, const QgsReadWriteContext &context) const override
Called by writeLayerXML(), used by children to write state specific to them to project files.
void selectByGeometry(const QgsGeometry &geometry, const QgsSelectionContext &context, Qgis::SelectBehavior behavior=Qgis::SelectBehavior::SetSelection, Qgis::SelectGeometryRelationship relationship=Qgis::SelectGeometryRelationship::Intersect, Qgis::SelectionFlags flags=Qgis::SelectionFlags(), QgsRenderContext *renderContext=nullptr)
Selects features found within the search geometry (in layer's coordinates).
bool labelsEnabled() const
Returns whether the layer contains labels which are enabled and should be drawn.
void setLabeling(QgsVectorTileLabeling *labeling)
Sets labeling for the map layer.
QList< QgsFeature > selectedFeatures() const
Returns the list of features currently selected in the layer.
QgsVectorTileLabeling * labeling() const
Returns currently assigned labeling.
~QgsVectorTileLayer() override
bool readSymbology(const QDomNode &node, QString &errorMessage, QgsReadWriteContext &context, StyleCategories categories=AllStyleCategories) override
Read the symbology for the current layer from the DOM node supplied.
int sourceMinZoom() const
Returns minimum zoom level at which source has any valid tiles (negative = unconstrained)
QgsMapLayerRenderer * createMapRenderer(QgsRenderContext &rendererContext) override
Returns new instance of QgsMapLayerRenderer that will be used for rendering of given context.
QString loadDefaultStyle(bool &resultFlag) override
Retrieve the default style for this layer if one exists (either as a .qml file on disk or as a record...
Qgis::MapLayerProperties properties() const override
Returns the map layer properties of this layer.
QString htmlMetadata() const override
Obtain a formatted HTML string containing assorted metadata for this layer.
QString encodedSource(const QString &source, const QgsReadWriteContext &context) const FINAL
Called by writeLayerXML(), used by derived classes to encode provider's specific data source to proje...
int sourceMaxZoom() const
Returns maximum zoom level at which source has any valid tiles (negative = unconstrained)
QgsVectorTileRenderer * renderer() const
Returns currently assigned renderer.
void removeSelection()
Clear selection.
QgsDataProvider * dataProvider() override
Returns the layer's data provider, it may be nullptr.
QString loadDefaultMetadata(bool &resultFlag) override
Retrieve the default metadata for this layer if one exists (either as a .qmd file on disk or as a rec...
QString sourcePath() const
Returns URL/path of the data source (syntax different to each data source type)
QgsVectorTileRawData getRawTile(QgsTileXYZ tileID)
Fetches raw tile data for the give tile coordinates.
void setTransformContext(const QgsCoordinateTransformContext &transformContext) override
Sets the coordinate transform context to transformContext.
QgsVectorTileMatrixSet & tileMatrixSet()
Returns the vector tile matrix set.
void selectionChanged()
Emitted whenever the selected features in the layer are changed.
QgsVectorTileLayer * clone() const override
Returns a new instance equivalent to this one except for the id which is still unique.
int selectedFeatureCount() const
Returns the number of features that are selected in this layer.
This class is responsible for decoding raw tile data written with Mapbox Vector Tiles encoding.
QStringList layerFieldNames(const QString &layerName) const
Returns a list of all field names in a tile. It can only be called after a successful decode()
QStringList layers() const
Returns a list of sub-layer names in a tile. It can only be called after a successful decode()
bool decode(const QgsVectorTileRawData &rawTileData)
Tries to decode raw tile data, returns true on success.
QgsVectorTileFeatures layerFeatures(const QMap< QString, QgsFields > &perLayerFields, const QgsCoordinateTransform &ct, const QSet< QString > *layerSubset=nullptr) const
Returns decoded features grouped by sub-layers.
Keeps track of raw tile data from one or more sources that need to be decoded.
QMap< QString, QByteArray > data
Raw tile data by source ID.
Abstract base class for all vector tile renderer implementations.
virtual void readXml(const QDomElement &elem, const QgsReadWriteContext &context)=0
Reads renderer's properties from given XML element.
static QgsFields makeQgisFields(const QSet< QString > &flds)
Returns QgsFields instance based on the set of field names.
static void loadSprites(const QVariantMap &styleDefinition, QgsMapBoxGlStyleConversionContext &context, const QString &styleUrl=QString())
Downloads the sprite image and sets it to the conversion context.
#define QgsDebugMsgLevel(str, level)
Definition qgslogger.h:39
#define QgsDebugError(str)
Definition qgslogger.h:38
#define QgsSetRequestInitiatorClass(request, _class)
#define QGIS_PROTECT_QOBJECT_THREAD_ACCESS_NON_FATAL
#define QGIS_PROTECT_QOBJECT_THREAD_ACCESS
QMap< QString, QVector< QgsFeature > > QgsVectorTileFeatures
Features of a vector tile, grouped by sub-layer names (key of the map)
Setting options for creating vector data providers.
Setting options for loading vector tile layers.