QGIS API Documentation 3.41.0-Master (d5b93354e9c)
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qgscategorizedsymbolrenderer.cpp
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1/***************************************************************************
2 qgscategorizedsymbolrenderer.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 <algorithm>
16
18
20#include "qgssymbol.h"
21#include "qgssymbollayerutils.h"
22#include "qgscolorramp.h"
23#include "qgscolorrampimpl.h"
27#include "qgspainteffect.h"
28#include "qgssymbollayer.h"
29#include "qgsfeature.h"
30#include "qgsvectorlayer.h"
31#include "qgslogger.h"
32#include "qgsproperty.h"
33#include "qgsstyle.h"
34#include "qgsfieldformatter.h"
36#include "qgsapplication.h"
40#include "qgsmarkersymbol.h"
42
43#include <QDomDocument>
44#include <QDomElement>
45#include <QSettings> // for legend
46#include <QRegularExpression>
47#include <QUuid>
48
49QgsRendererCategory::QgsRendererCategory( const QVariant &value, QgsSymbol *symbol, const QString &label, bool render, const QString &uuid )
50 : mValue( value )
51 , mSymbol( symbol )
52 , mLabel( label )
53 , mRender( render )
54{
55 mUuid = !uuid.isEmpty() ? uuid : QUuid::createUuid().toString();
56}
57
59 : mValue( cat.mValue )
60 , mSymbol( cat.mSymbol ? cat.mSymbol->clone() : nullptr )
61 , mLabel( cat.mLabel )
62 , mRender( cat.mRender )
63 , mUuid( cat.mUuid )
64{
65}
66
68{
69 mValue = cat.mValue;
70 mSymbol.reset( cat.mSymbol ? cat.mSymbol->clone() : nullptr );
71 mLabel = cat.mLabel;
72 mRender = cat.mRender;
73 mUuid = cat.mUuid;
74 return *this;
75}
76
78
80{
81 return mUuid;
82}
83
85{
86 return mValue;
87}
88
90{
91 return mSymbol.get();
92}
93
95{
96 return mLabel;
97}
98
100{
101 return mRender;
102}
103
104void QgsRendererCategory::setValue( const QVariant &value )
105{
106 mValue = value;
107}
108
110{
111 if ( mSymbol.get() != s ) mSymbol.reset( s );
112}
113
114void QgsRendererCategory::setLabel( const QString &label )
115{
116 mLabel = label;
117}
118
120{
121 mRender = render;
122}
123
125{
126 return QStringLiteral( "%1::%2::%3:%4\n" ).arg( mValue.toString(), mLabel, mSymbol->dump() ).arg( mRender );
127}
128
129void QgsRendererCategory::toSld( QDomDocument &doc, QDomElement &element, QVariantMap props ) const
130{
131 if ( !mSymbol.get() || props.value( QStringLiteral( "attribute" ), QString() ).toString().isEmpty() )
132 return;
133
134 QString attrName = props[ QStringLiteral( "attribute" )].toString();
135
136 // try to determine if attribute name is actually a field reference or expression.
137 // If it's a field reference, we need to quote it.
138 // Because we don't have access to the layer or fields here, we treat a parser error
139 // as just an unquoted field name (eg a field name with spaces)
140 const QgsExpression attrExpression = QgsExpression( attrName );
141 if ( attrExpression.hasParserError() )
142 {
143 attrName = QgsExpression::quotedColumnRef( attrName );
144 }
145 else if ( attrExpression.isField() )
146 {
148 qgis::down_cast<const QgsExpressionNodeColumnRef *>( attrExpression.rootNode() )->name()
149 );
150 }
151
152 QDomElement ruleElem = doc.createElement( QStringLiteral( "se:Rule" ) );
153
154 QDomElement nameElem = doc.createElement( QStringLiteral( "se:Name" ) );
155 nameElem.appendChild( doc.createTextNode( mLabel ) );
156 ruleElem.appendChild( nameElem );
157
158 QDomElement descrElem = doc.createElement( QStringLiteral( "se:Description" ) );
159 QDomElement titleElem = doc.createElement( QStringLiteral( "se:Title" ) );
160 QString descrStr = QStringLiteral( "%1 is '%2'" ).arg( attrName, mValue.toString() );
161 titleElem.appendChild( doc.createTextNode( !mLabel.isEmpty() ? mLabel : descrStr ) );
162 descrElem.appendChild( titleElem );
163 ruleElem.appendChild( descrElem );
164
165 // create the ogc:Filter for the range
166 QString filterFunc;
167 if ( mValue.userType() == QMetaType::Type::QVariantList )
168 {
169 const QVariantList list = mValue.toList();
170 if ( list.size() == 1 )
171 {
172 filterFunc = QStringLiteral( "%1 = %2" ).arg( attrName, QgsExpression::quotedValue( list.at( 0 ) ) );
173 }
174 else
175 {
176 QStringList valuesList;
177 valuesList.reserve( list.size() );
178 for ( const QVariant &v : list )
179 {
180 valuesList << QgsExpression::quotedValue( v );
181 }
182 filterFunc = QStringLiteral( "%1 IN (%2)" ).arg( attrName,
183 valuesList.join( ',' ) );
184 }
185 }
186 else if ( QgsVariantUtils::isNull( mValue ) || mValue.toString().isEmpty() )
187 {
188 filterFunc = QStringLiteral( "ELSE" );
189 }
190 else
191 {
192 filterFunc = QStringLiteral( "%1 = %2" ).arg( attrName, QgsExpression::quotedValue( mValue ) );
193 }
194
195 QgsSymbolLayerUtils::createFunctionElement( doc, ruleElem, filterFunc );
196
197 // add the mix/max scale denoms if we got any from the callers
198 QgsSymbolLayerUtils::applyScaleDependency( doc, ruleElem, props );
199
200 mSymbol->toSld( doc, ruleElem, props );
201 if ( !QgsSymbolLayerUtils::hasSldSymbolizer( ruleElem ) )
202 {
203 // symbol could not be converted to SLD, or is an "empty" symbol. In this case we do not generate a rule, as
204 // SLD spec requires a Symbolizer element to be present
205 return;
206 }
207
208 element.appendChild( ruleElem );
209}
210
212
214 : QgsFeatureRenderer( QStringLiteral( "categorizedSymbol" ) )
215 , mAttrName( attrName )
216{
217 //important - we need a deep copy of the categories list, not a shared copy. This is required because
218 //QgsRendererCategory::symbol() is marked const, and so retrieving the symbol via this method does not
219 //trigger a detachment and copy of mCategories BUT that same method CAN be used to modify a symbol in place
220 for ( const QgsRendererCategory &cat : categories )
221 {
222 if ( !cat.symbol() )
223 {
224 QgsDebugError( QStringLiteral( "invalid symbol in a category! ignoring..." ) );
225 }
226 mCategories << cat;
227 }
228}
229
231{
233 QgsCategoryList::const_iterator catIt = mCategories.constBegin();
234 for ( ; catIt != mCategories.constEnd(); ++catIt )
235 {
236 if ( QgsSymbol *catSymbol = catIt->symbol() )
237 {
238 if ( catSymbol->flags().testFlag( Qgis::SymbolFlag::AffectsLabeling ) )
240 }
241 }
242
243 return res;
244}
245
247
249{
250 mSymbolHash.clear();
251
252 for ( const QgsRendererCategory &cat : std::as_const( mCategories ) )
253 {
254 const QVariant val = cat.value();
255 if ( val.userType() == QMetaType::Type::QVariantList )
256 {
257 const QVariantList list = val.toList();
258 for ( const QVariant &v : list )
259 {
260 mSymbolHash.insert( v.toString(), ( cat.renderState() || mCounting ) ? cat.symbol() : nullptr );
261 }
262 }
263 else
264 {
265 mSymbolHash.insert( val.toString(), ( cat.renderState() || mCounting ) ? cat.symbol() : nullptr );
266 }
267 }
268}
269
274
276{
277 bool found = false;
278 return symbolForValue( value, found );
279}
280
281QgsSymbol *QgsCategorizedSymbolRenderer::symbolForValue( const QVariant &value, bool &foundMatchingSymbol ) const
282{
283 foundMatchingSymbol = false;
284
285 // TODO: special case for int, double
286 QHash<QString, QgsSymbol *>::const_iterator it = mSymbolHash.constFind( QgsVariantUtils::isNull( value ) ? QString() : value.toString() );
287 if ( it == mSymbolHash.constEnd() )
288 {
289 if ( mSymbolHash.isEmpty() )
290 {
291 QgsDebugError( QStringLiteral( "there are no hashed symbols!!!" ) );
292 }
293 else
294 {
295 QgsDebugMsgLevel( "attribute value not found: " + value.toString(), 3 );
296 }
297 return nullptr;
298 }
299
300 foundMatchingSymbol = true;
301
302 return *it;
303}
304
306{
307 return originalSymbolForFeature( feature, context );
308}
309
310QVariant QgsCategorizedSymbolRenderer::valueForFeature( const QgsFeature &feature, QgsRenderContext &context ) const
311{
312 QgsAttributes attrs = feature.attributes();
313 QVariant value;
314 if ( mAttrNum == -1 )
315 {
316 Q_ASSERT( mExpression );
317
318 value = mExpression->evaluate( &context.expressionContext() );
319 }
320 else
321 {
322 value = attrs.value( mAttrNum );
323 }
324
325 return value;
326}
327
329{
330 QVariant value = valueForFeature( feature, context );
331
332 bool foundCategory = false;
333 // find the right symbol for the category
334 QgsSymbol *symbol = symbolForValue( value, foundCategory );
335
336 if ( !foundCategory )
337 {
338 // if no symbol found, use default symbol
339 return symbolForValue( QVariant( "" ), foundCategory );
340 }
341
342 return symbol;
343}
344
345
347{
348 for ( int i = 0; i < mCategories.count(); i++ )
349 {
350 if ( mCategories[i].value() == val )
351 return i;
352 }
353 return -1;
354}
355
357{
358 int idx = -1;
359 for ( int i = 0; i < mCategories.count(); i++ )
360 {
361 if ( mCategories[i].label() == val )
362 {
363 if ( idx != -1 )
364 return -1;
365 else
366 idx = i;
367 }
368 }
369 return idx;
370}
371
372bool QgsCategorizedSymbolRenderer::updateCategoryValue( int catIndex, const QVariant &value )
373{
374 if ( catIndex < 0 || catIndex >= mCategories.size() )
375 return false;
376 mCategories[catIndex].setValue( value );
377 return true;
378}
379
381{
382 if ( catIndex < 0 || catIndex >= mCategories.size() )
383 return false;
384 mCategories[catIndex].setSymbol( symbol );
385 return true;
386}
387
388bool QgsCategorizedSymbolRenderer::updateCategoryLabel( int catIndex, const QString &label )
389{
390 if ( catIndex < 0 || catIndex >= mCategories.size() )
391 return false;
392 mCategories[catIndex].setLabel( label );
393 return true;
394}
395
397{
398 if ( catIndex < 0 || catIndex >= mCategories.size() )
399 return false;
400 mCategories[catIndex].setRenderState( render );
401 return true;
402}
403
405{
406 if ( !cat.symbol() )
407 {
408 QgsDebugError( QStringLiteral( "invalid symbol in a category! ignoring..." ) );
409 return;
410 }
411
412 mCategories.append( cat );
413}
414
416{
417 if ( catIndex < 0 || catIndex >= mCategories.size() )
418 return false;
419
420 mCategories.removeAt( catIndex );
421 return true;
422}
423
428
430{
431 if ( from < 0 || from >= mCategories.size() || to < 0 || to >= mCategories.size() ) return;
432 mCategories.move( from, to );
433}
434
436{
437 return qgsVariantLessThan( c1.value(), c2.value() );
438}
440{
441 return qgsVariantGreaterThan( c1.value(), c2.value() );
442}
443
445{
446 if ( order == Qt::AscendingOrder )
447 {
448 std::sort( mCategories.begin(), mCategories.end(), valueLessThan );
449 }
450 else
451 {
452 std::sort( mCategories.begin(), mCategories.end(), valueGreaterThan );
453 }
454}
455
457{
458 return QString::localeAwareCompare( c1.label(), c2.label() ) < 0;
459}
460
462{
463 return !labelLessThan( c1, c2 );
464}
465
467{
468 if ( order == Qt::AscendingOrder )
469 {
470 std::sort( mCategories.begin(), mCategories.end(), labelLessThan );
471 }
472 else
473 {
474 std::sort( mCategories.begin(), mCategories.end(), labelGreaterThan );
475 }
476}
477
479{
480 QgsFeatureRenderer::startRender( context, fields );
481
482 mCounting = context.rendererScale() == 0.0;
483
484 // make sure that the hash table is up to date
485 rebuildHash();
486
487 // find out classification attribute index from name
488 mAttrNum = fields.lookupField( mAttrName );
489 if ( mAttrNum == -1 )
490 {
491 mExpression.reset( new QgsExpression( mAttrName ) );
492 mExpression->prepare( &context.expressionContext() );
493 }
494
495 for ( const QgsRendererCategory &cat : std::as_const( mCategories ) )
496 {
497 cat.symbol()->startRender( context, fields );
498 }
499}
500
502{
504
505 for ( const QgsRendererCategory &cat : std::as_const( mCategories ) )
506 {
507 cat.symbol()->stopRender( context );
508 }
509 mExpression.reset();
510}
511
513{
514 QSet<QString> attributes;
515
516 // mAttrName can contain either attribute name or an expression.
517 // Sometimes it is not possible to distinguish between those two,
518 // e.g. "a - b" can be both a valid attribute name or expression.
519 // Since we do not have access to fields here, try both options.
520 attributes << mAttrName;
521
522 QgsExpression testExpr( mAttrName );
523 if ( !testExpr.hasParserError() )
524 attributes.unite( testExpr.referencedColumns() );
525
526 QgsCategoryList::const_iterator catIt = mCategories.constBegin();
527 for ( ; catIt != mCategories.constEnd(); ++catIt )
528 {
529 QgsSymbol *catSymbol = catIt->symbol();
530 if ( catSymbol )
531 {
532 attributes.unite( catSymbol->usedAttributes( context ) );
533 }
534 }
535 return attributes;
536}
537
539{
540 QgsExpression testExpr( mAttrName );
541 if ( !testExpr.hasParserError() )
542 {
543 QgsExpressionContext context;
544 context.appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( nullptr ) ); // unfortunately no layer access available!
545 testExpr.prepare( &context );
546 return testExpr.needsGeometry();
547 }
548 return false;
549}
550
552{
553 QString s = QStringLiteral( "CATEGORIZED: idx %1\n" ).arg( mAttrName );
554 for ( int i = 0; i < mCategories.count(); i++ )
555 s += mCategories[i].dump();
556 return s;
557}
558
573
574void QgsCategorizedSymbolRenderer::toSld( QDomDocument &doc, QDomElement &element, const QVariantMap &props ) const
575{
576 QVariantMap newProps = props;
577 newProps[ QStringLiteral( "attribute" )] = mAttrName;
578
579 // create a Rule for each range
580 for ( QgsCategoryList::const_iterator it = mCategories.constBegin(); it != mCategories.constEnd(); ++it )
581 {
582 it->toSld( doc, element, newProps );
583 }
584}
585
587{
588 int attrNum = fields.lookupField( mAttrName );
589 bool isExpression = ( attrNum == -1 );
590
591 bool hasDefault = false;
592 bool defaultActive = false;
593 bool allActive = true;
594 bool noneActive = true;
595
596 //we need to build lists of both inactive and active values, as either list may be required
597 //depending on whether the default category is active or not
598 QString activeValues;
599 QString inactiveValues;
600
601 for ( const QgsRendererCategory &cat : std::as_const( mCategories ) )
602 {
603 if ( cat.value() == "" || QgsVariantUtils::isNull( cat.value() ) )
604 {
605 hasDefault = true;
606 defaultActive = cat.renderState();
607 }
608
609 noneActive = noneActive && !cat.renderState();
610 allActive = allActive && cat.renderState();
611
612 const bool isList = cat.value().userType() == QMetaType::Type::QVariantList;
613 QString value = QgsExpression::quotedValue( cat.value(), static_cast<QMetaType::Type>( cat.value().userType() ) );
614
615 if ( !cat.renderState() )
616 {
617 if ( value != "" )
618 {
619 if ( isList )
620 {
621 const QVariantList list = cat.value().toList();
622 for ( const QVariant &v : list )
623 {
624 if ( !inactiveValues.isEmpty() )
625 inactiveValues.append( ',' );
626
627 inactiveValues.append( QgsExpression::quotedValue( v, isExpression ? static_cast<QMetaType::Type>( v.userType() ) : fields.at( attrNum ).type() ) );
628 }
629 }
630 else
631 {
632 if ( !inactiveValues.isEmpty() )
633 inactiveValues.append( ',' );
634
635 inactiveValues.append( value );
636 }
637 }
638 }
639 else
640 {
641 if ( value != "" )
642 {
643 if ( isList )
644 {
645 const QVariantList list = cat.value().toList();
646 for ( const QVariant &v : list )
647 {
648 if ( !activeValues.isEmpty() )
649 activeValues.append( ',' );
650
651 activeValues.append( QgsExpression::quotedValue( v, isExpression ? static_cast<QMetaType::Type>( v.userType() ) : fields.at( attrNum ).type() ) );
652 }
653 }
654 else
655 {
656 if ( !activeValues.isEmpty() )
657 activeValues.append( ',' );
658
659 activeValues.append( value );
660 }
661 }
662 }
663 }
664
665 QString attr = isExpression ? mAttrName : QStringLiteral( "\"%1\"" ).arg( mAttrName );
666
667 if ( allActive && hasDefault )
668 {
669 return QString();
670 }
671 else if ( noneActive )
672 {
673 return QStringLiteral( "FALSE" );
674 }
675 else if ( defaultActive )
676 {
677 return QStringLiteral( "(%1) NOT IN (%2) OR (%1) IS NULL" ).arg( attr, inactiveValues );
678 }
679 else
680 {
681 return QStringLiteral( "(%1) IN (%2)" ).arg( attr, activeValues );
682 }
683}
684
686{
687 Q_UNUSED( context )
688 QgsSymbolList lst;
689 lst.reserve( mCategories.count() );
690 for ( const QgsRendererCategory &cat : mCategories )
691 {
692 lst.append( cat.symbol() );
693 }
694 return lst;
695}
696
698{
699 for ( const QgsRendererCategory &cat : mCategories )
700 {
701 QgsStyleSymbolEntity entity( cat.symbol() );
702 if ( !visitor->visit( QgsStyleEntityVisitorInterface::StyleLeaf( &entity, cat.value().toString(), cat.label() ) ) )
703 return false;
704 }
705
706 if ( mSourceColorRamp )
707 {
709 if ( !visitor->visit( QgsStyleEntityVisitorInterface::StyleLeaf( &entity ) ) )
710 return false;
711 }
712
713 return true;
714}
715
717{
718 QDomElement symbolsElem = element.firstChildElement( QStringLiteral( "symbols" ) );
719 if ( symbolsElem.isNull() )
720 return nullptr;
721
722 QDomElement catsElem = element.firstChildElement( QStringLiteral( "categories" ) );
723 if ( catsElem.isNull() )
724 return nullptr;
725
726 QgsSymbolMap symbolMap = QgsSymbolLayerUtils::loadSymbols( symbolsElem, context );
727 QgsCategoryList cats;
728
729 // Value from string (long, ulong, double and string)
730 const auto valueFromString = []( const QString & value, const QString & valueType ) -> QVariant
731 {
732 if ( valueType == QLatin1String( "double" ) )
733 {
734 bool ok;
735 const auto val { value.toDouble( &ok ) };
736 if ( ok )
737 {
738 return val;
739 }
740 }
741 else if ( valueType == QLatin1String( "ulong" ) )
742 {
743 bool ok;
744 const auto val { value.toULongLong( &ok ) };
745 if ( ok )
746 {
747 return val;
748 }
749 }
750 else if ( valueType == QLatin1String( "long" ) )
751 {
752 bool ok;
753 const auto val { value.toLongLong( &ok ) };
754 if ( ok )
755 {
756 return val;
757 }
758 }
759 else if ( valueType == QLatin1String( "bool" ) )
760 {
761 if ( value.toLower() == QLatin1String( "false" ) )
762 return false;
763 if ( value.toLower() == QLatin1String( "true" ) )
764 return true;
765 }
766 else if ( valueType == QLatin1String( "NULL" ) )
767 {
768 // This is the default ("fallback") category
769 return QVariant();
770 }
771 return value;
772 };
773
774 QDomElement catElem = catsElem.firstChildElement();
775 int i = 0;
776 while ( !catElem.isNull() )
777 {
778 if ( catElem.tagName() == QLatin1String( "category" ) )
779 {
780 QVariant value;
781 if ( catElem.hasAttribute( QStringLiteral( "value" ) ) )
782 {
783 value = valueFromString( catElem.attribute( QStringLiteral( "value" ) ), catElem.attribute( QStringLiteral( "type" ), QString() ) ) ;
784 }
785 else
786 {
787 QVariantList values;
788 QDomElement valElem = catElem.firstChildElement();
789 while ( !valElem.isNull() )
790 {
791 if ( valElem.tagName() == QLatin1String( "val" ) )
792 {
793 values << valueFromString( valElem.attribute( QStringLiteral( "value" ) ), valElem.attribute( QStringLiteral( "type" ), QString() ) );
794 }
795 valElem = valElem.nextSiblingElement();
796 }
797 if ( !values.isEmpty() )
798 value = values;
799 }
800 QString symbolName = catElem.attribute( QStringLiteral( "symbol" ) );
801 QString label = catElem.attribute( QStringLiteral( "label" ) );
802 bool render = catElem.attribute( QStringLiteral( "render" ) ) != QLatin1String( "false" );
803 QString uuid = catElem.attribute( QStringLiteral( "uuid" ), QString::number( i++ ) );
804 if ( symbolMap.contains( symbolName ) )
805 {
806 QgsSymbol *symbol = symbolMap.take( symbolName );
807 cats.append( QgsRendererCategory( value, symbol, label, render, uuid ) );
808 }
809 }
810 catElem = catElem.nextSiblingElement();
811 }
812
813 QString attrName = element.attribute( QStringLiteral( "attr" ) );
814
816
817 // delete symbols if there are any more
819
820 // try to load source symbol (optional)
821 QDomElement sourceSymbolElem = element.firstChildElement( QStringLiteral( "source-symbol" ) );
822 if ( !sourceSymbolElem.isNull() )
823 {
824 QgsSymbolMap sourceSymbolMap = QgsSymbolLayerUtils::loadSymbols( sourceSymbolElem, context );
825 if ( sourceSymbolMap.contains( QStringLiteral( "0" ) ) )
826 {
827 r->setSourceSymbol( sourceSymbolMap.take( QStringLiteral( "0" ) ) );
828 }
829 QgsSymbolLayerUtils::clearSymbolMap( sourceSymbolMap );
830 }
831
832 // try to load color ramp (optional)
833 QDomElement sourceColorRampElem = element.firstChildElement( QStringLiteral( "colorramp" ) );
834 if ( !sourceColorRampElem.isNull() && sourceColorRampElem.attribute( QStringLiteral( "name" ) ) == QLatin1String( "[source]" ) )
835 {
836 r->setSourceColorRamp( QgsSymbolLayerUtils::loadColorRamp( sourceColorRampElem ) );
837 }
838
839 QDomElement rotationElem = element.firstChildElement( QStringLiteral( "rotation" ) );
840 if ( !rotationElem.isNull() && !rotationElem.attribute( QStringLiteral( "field" ) ).isEmpty() )
841 {
842 for ( const QgsRendererCategory &cat : r->mCategories )
843 {
844 convertSymbolRotation( cat.symbol(), rotationElem.attribute( QStringLiteral( "field" ) ) );
845 }
846 if ( r->mSourceSymbol )
847 {
848 convertSymbolRotation( r->mSourceSymbol.get(), rotationElem.attribute( QStringLiteral( "field" ) ) );
849 }
850 }
851
852 QDomElement sizeScaleElem = element.firstChildElement( QStringLiteral( "sizescale" ) );
853 if ( !sizeScaleElem.isNull() && !sizeScaleElem.attribute( QStringLiteral( "field" ) ).isEmpty() )
854 {
855 for ( const QgsRendererCategory &cat : r->mCategories )
856 {
857 convertSymbolSizeScale( cat.symbol(),
858 QgsSymbolLayerUtils::decodeScaleMethod( sizeScaleElem.attribute( QStringLiteral( "scalemethod" ) ) ),
859 sizeScaleElem.attribute( QStringLiteral( "field" ) ) );
860 }
861 if ( r->mSourceSymbol && r->mSourceSymbol->type() == Qgis::SymbolType::Marker )
862 {
864 QgsSymbolLayerUtils::decodeScaleMethod( sizeScaleElem.attribute( QStringLiteral( "scalemethod" ) ) ),
865 sizeScaleElem.attribute( QStringLiteral( "field" ) ) );
866 }
867 }
868
869 QDomElement ddsLegendSizeElem = element.firstChildElement( QStringLiteral( "data-defined-size-legend" ) );
870 if ( !ddsLegendSizeElem.isNull() )
871 {
872 r->mDataDefinedSizeLegend.reset( QgsDataDefinedSizeLegend::readXml( ddsLegendSizeElem, context ) );
873 }
874
875 // TODO: symbol levels
876 return r;
877}
878
879QDomElement QgsCategorizedSymbolRenderer::save( QDomDocument &doc, const QgsReadWriteContext &context )
880{
881 // clazy:skip
882 QDomElement rendererElem = doc.createElement( RENDERER_TAG_NAME );
883 rendererElem.setAttribute( QStringLiteral( "type" ), QStringLiteral( "categorizedSymbol" ) );
884 rendererElem.setAttribute( QStringLiteral( "attr" ), mAttrName );
885
886 // String for type
887 // We just need string, bool, and three numeric types: double, ulong and long for unsigned, signed and float/double
888 const auto stringForType = []( const QMetaType::Type type ) -> QString
889 {
890 if ( type == QMetaType::Type::QChar || type == QMetaType::Type::Int || type == QMetaType::Type::LongLong )
891 {
892 return QStringLiteral( "long" );
893 }
894 else if ( type == QMetaType::Type::UInt || type == QMetaType::Type::ULongLong )
895 {
896 return QStringLiteral( "ulong" );
897 }
898 else if ( type == QMetaType::Type::Double )
899 {
900 return QStringLiteral( "double" ) ;
901 }
902 else if ( type == QMetaType::Type::Bool )
903 {
904 return QStringLiteral( "bool" );
905 }
906 else // Default: string
907 {
908 return QStringLiteral( "string" );
909 }
910 };
911
912 // categories
913 if ( !mCategories.isEmpty() )
914 {
915 int i = 0;
917 QDomElement catsElem = doc.createElement( QStringLiteral( "categories" ) );
918 QgsCategoryList::const_iterator it = mCategories.constBegin();
919 for ( ; it != mCategories.constEnd(); ++it )
920 {
921 const QgsRendererCategory &cat = *it;
922 QString symbolName = QString::number( i );
923 symbols.insert( symbolName, cat.symbol() );
924
925 QDomElement catElem = doc.createElement( QStringLiteral( "category" ) );
926 if ( cat.value().userType() == QMetaType::Type::QVariantList )
927 {
928 const QVariantList list = cat.value().toList();
929 for ( const QVariant &v : list )
930 {
931 QDomElement valueElem = doc.createElement( QStringLiteral( "val" ) );
932 valueElem.setAttribute( QStringLiteral( "value" ), v.toString() );
933 valueElem.setAttribute( QStringLiteral( "type" ), stringForType( static_cast<QMetaType::Type>( v.userType() ) ) );
934 catElem.appendChild( valueElem );
935 }
936 }
937 else
938 {
939 if ( QgsVariantUtils::isNull( cat.value() ) )
940 {
941 // We need to save NULL value as specific kind, it is the default ("fallback") category
942 catElem.setAttribute( QStringLiteral( "value" ), "NULL" );
943 catElem.setAttribute( QStringLiteral( "type" ), "NULL" );
944 }
945 else
946 {
947 catElem.setAttribute( QStringLiteral( "value" ), cat.value().toString() );
948 catElem.setAttribute( QStringLiteral( "type" ), stringForType( static_cast<QMetaType::Type>( cat.value().userType() ) ) );
949 }
950 }
951 catElem.setAttribute( QStringLiteral( "symbol" ), symbolName );
952 catElem.setAttribute( QStringLiteral( "label" ), cat.label() );
953 catElem.setAttribute( QStringLiteral( "render" ), cat.renderState() ? "true" : "false" );
954 catElem.setAttribute( QStringLiteral( "uuid" ), cat.uuid() );
955 catsElem.appendChild( catElem );
956 i++;
957 }
958 rendererElem.appendChild( catsElem );
959
960 // save symbols
961 QDomElement symbolsElem = QgsSymbolLayerUtils::saveSymbols( symbols, QStringLiteral( "symbols" ), doc, context );
962 rendererElem.appendChild( symbolsElem );
963 }
964
965 // save source symbol
966 if ( mSourceSymbol )
967 {
968 QgsSymbolMap sourceSymbols;
969 sourceSymbols.insert( QStringLiteral( "0" ), mSourceSymbol.get() );
970 QDomElement sourceSymbolElem = QgsSymbolLayerUtils::saveSymbols( sourceSymbols, QStringLiteral( "source-symbol" ), doc, context );
971 rendererElem.appendChild( sourceSymbolElem );
972 }
973
974 // save source color ramp
975 if ( mSourceColorRamp )
976 {
977 QDomElement colorRampElem = QgsSymbolLayerUtils::saveColorRamp( QStringLiteral( "[source]" ), mSourceColorRamp.get(), doc );
978 rendererElem.appendChild( colorRampElem );
979 }
980
981 QDomElement rotationElem = doc.createElement( QStringLiteral( "rotation" ) );
982 rendererElem.appendChild( rotationElem );
983
984 QDomElement sizeScaleElem = doc.createElement( QStringLiteral( "sizescale" ) );
985 rendererElem.appendChild( sizeScaleElem );
986
988 {
989 QDomElement ddsLegendElem = doc.createElement( QStringLiteral( "data-defined-size-legend" ) );
990 mDataDefinedSizeLegend->writeXml( ddsLegendElem, context );
991 rendererElem.appendChild( ddsLegendElem );
992 }
993
994 saveRendererData( doc, rendererElem, context );
995
996 return rendererElem;
997}
998
999
1000QgsLegendSymbolList QgsCategorizedSymbolRenderer::baseLegendSymbolItems() const
1001{
1003 for ( const QgsRendererCategory &cat : mCategories )
1004 {
1005 lst << QgsLegendSymbolItem( cat.symbol(), cat.label(), cat.uuid(), true );
1006 }
1007 return lst;
1008}
1009
1011{
1012
1013 auto _displayString = [ ]( const QVariant & v, int precision ) -> QString
1014 {
1015
1016 if ( QgsVariantUtils::isNull( v ) )
1017 {
1019 }
1020
1021 const bool isNumeric {v.userType() == QMetaType::Type::Double || v.userType() == QMetaType::Type::Int || v.userType() == QMetaType::Type::UInt || v.userType() == QMetaType::Type::LongLong || v.userType() == QMetaType::Type::ULongLong};
1022
1023 // Special treatment for numeric types if group separator is set or decimalPoint is not a dot
1024 if ( v.userType() == QMetaType::Type::Double )
1025 {
1026 // if value doesn't contain a double (a default value expression for instance),
1027 // apply no transformation
1028 bool ok;
1029 v.toDouble( &ok );
1030 if ( !ok )
1031 return v.toString();
1032
1033 // Locales with decimal point != '.' or that require group separator: use QLocale
1034 if ( QLocale().decimalPoint() != '.' ||
1035 !( QLocale().numberOptions() & QLocale::NumberOption::OmitGroupSeparator ) )
1036 {
1037 if ( precision > 0 )
1038 {
1039 if ( -1 < v.toDouble() && v.toDouble() < 1 )
1040 {
1041 return QLocale().toString( v.toDouble(), 'g', precision );
1042 }
1043 else
1044 {
1045 return QLocale().toString( v.toDouble(), 'f', precision );
1046 }
1047 }
1048 else
1049 {
1050 // Precision is not set, let's guess it from the
1051 // standard conversion to string
1052 const QString s( v.toString() );
1053 const int dotPosition( s.indexOf( '.' ) );
1054 int precision;
1055 if ( dotPosition < 0 && s.indexOf( 'e' ) < 0 )
1056 {
1057 precision = 0;
1058 return QLocale().toString( v.toDouble(), 'f', precision );
1059 }
1060 else
1061 {
1062 if ( dotPosition < 0 ) precision = 0;
1063 else precision = s.length() - dotPosition - 1;
1064
1065 if ( -1 < v.toDouble() && v.toDouble() < 1 )
1066 {
1067 return QLocale().toString( v.toDouble(), 'g', precision );
1068 }
1069 else
1070 {
1071 return QLocale().toString( v.toDouble(), 'f', precision );
1072 }
1073 }
1074 }
1075 }
1076 // Default for doubles with precision
1077 else if ( precision > 0 )
1078 {
1079 if ( -1 < v.toDouble() && v.toDouble() < 1 )
1080 {
1081 return QString::number( v.toDouble(), 'g', precision );
1082 }
1083 else
1084 {
1085 return QString::number( v.toDouble(), 'f', precision );
1086 }
1087 }
1088 }
1089 // Other numeric types than doubles
1090 else if ( isNumeric &&
1091 !( QLocale().numberOptions() & QLocale::NumberOption::OmitGroupSeparator ) )
1092 {
1093 bool ok;
1094 const qlonglong converted( v.toLongLong( &ok ) );
1095 if ( ok )
1096 return QLocale().toString( converted );
1097 }
1098 else if ( v.userType() == QMetaType::Type::QByteArray )
1099 {
1100 return QObject::tr( "BLOB" );
1101 }
1102
1103 // Fallback if special rules do not apply
1104 return v.toString();
1105 };
1106
1107 if ( v.userType() == QMetaType::Type::QStringList || v.userType() == QMetaType::Type::QVariantList )
1108 {
1109 // Note that this code is never hit because the joining of lists (merged categories) happens
1110 // in data(); I'm leaving this here anyway because it is tested and it may be useful for
1111 // other purposes in the future.
1112 QString result;
1113 const QVariantList list = v.toList();
1114 for ( const QVariant &var : list )
1115 {
1116 if ( !result.isEmpty() )
1117 {
1118 result.append( ';' );
1119 }
1120 result.append( _displayString( var, precision ) );
1121 }
1122 return result;
1123 }
1124 else
1125 {
1126 return _displayString( v, precision );
1127 }
1128}
1129
1131{
1133 {
1134 // check that all symbols that have the same size expression
1135 QgsProperty ddSize;
1136 for ( const QgsRendererCategory &category : mCategories )
1137 {
1138 const QgsMarkerSymbol *symbol = static_cast<const QgsMarkerSymbol *>( category.symbol() );
1139 if ( ddSize )
1140 {
1141 QgsProperty sSize( symbol->dataDefinedSize() );
1142 if ( sSize != ddSize )
1143 {
1144 // no common size expression
1145 return baseLegendSymbolItems();
1146 }
1147 }
1148 else
1149 {
1150 ddSize = symbol->dataDefinedSize();
1151 }
1152 }
1153
1154 if ( ddSize && ddSize.isActive() )
1155 {
1157
1159 ddSizeLegend.updateFromSymbolAndProperty( static_cast<const QgsMarkerSymbol *>( mSourceSymbol.get() ), ddSize );
1160 lst += ddSizeLegend.legendSymbolList();
1161
1162 lst += baseLegendSymbolItems();
1163 return lst;
1164 }
1165 }
1166
1167 return baseLegendSymbolItems();
1168}
1169
1171{
1172 const QVariant value = valueForFeature( feature, context );
1173
1174 for ( const QgsRendererCategory &cat : mCategories )
1175 {
1176 bool match = false;
1177 if ( cat.value().userType() == QMetaType::Type::QVariantList )
1178 {
1179 const QVariantList list = cat.value().toList();
1180 for ( const QVariant &v : list )
1181 {
1182 if ( value == v )
1183 {
1184 match = true;
1185 break;
1186 }
1187 }
1188 }
1189 else
1190 {
1191 // Numeric NULL cat value is stored as an empty string
1192 if ( QgsVariantUtils::isNull( value ) && ( value.userType() == QMetaType::Type::Double || value.userType() == QMetaType::Type::Int ||
1193 value.userType() == QMetaType::Type::UInt || value.userType() == QMetaType::Type::LongLong ||
1194 value.userType() == QMetaType::Type::ULongLong || value.userType() == QMetaType::Type::Bool ) )
1195 {
1196 match = cat.value().toString().isEmpty();
1197 }
1198 else
1199 {
1200 match = value == cat.value();
1201 }
1202 }
1203
1204 if ( match )
1205 {
1206 if ( cat.renderState() || mCounting )
1207 return QSet< QString >() << cat.uuid();
1208 else
1209 return QSet< QString >();
1210 }
1211 }
1212
1213 return QSet< QString >();
1214}
1215
1216QString QgsCategorizedSymbolRenderer::legendKeyToExpression( const QString &key, QgsVectorLayer *layer, bool &ok ) const
1217{
1218 ok = false;
1219 int i = 0;
1220 for ( i = 0; i < mCategories.size(); i++ )
1221 {
1222 if ( mCategories[i].uuid() == key )
1223 {
1224 ok = true;
1225 break;
1226 }
1227 }
1228
1229 if ( !ok )
1230 {
1231 ok = false;
1232 return QString();
1233 }
1234
1235 const int fieldIndex = layer ? layer->fields().lookupField( mAttrName ) : -1;
1236 const bool isNumeric = layer && fieldIndex >= 0 ? layer->fields().at( fieldIndex ).isNumeric() : false;
1237 const QMetaType::Type fieldType = layer && fieldIndex >= 0 ? layer->fields().at( fieldIndex ).type() : QMetaType::Type::UnknownType;
1238 const QString attributeComponent = QgsExpression::quoteFieldExpression( mAttrName, layer );
1239
1240 ok = true;
1241 const QgsRendererCategory &cat = mCategories[i];
1242 if ( cat.value().userType() == QMetaType::Type::QVariantList )
1243 {
1244 const QVariantList list = cat.value().toList();
1245 QStringList parts;
1246 parts.reserve( list.size() );
1247 for ( const QVariant &v : list )
1248 {
1249 parts.append( QgsExpression::quotedValue( v ) );
1250 }
1251
1252 return QStringLiteral( "%1 IN (%2)" ).arg( attributeComponent, parts.join( QLatin1String( ", " ) ) );
1253 }
1254 else
1255 {
1256 // Numeric NULL cat value is stored as an empty string
1257 QVariant value = cat.value();
1258 if ( isNumeric && value.toString().isEmpty() )
1259 {
1260 value = QVariant();
1261 }
1262
1263 if ( QgsVariantUtils::isNull( value ) )
1264 return QStringLiteral( "%1 IS NULL" ).arg( attributeComponent );
1265 else if ( fieldType == QMetaType::Type::UnknownType )
1266 return QStringLiteral( "%1 = %2" ).arg( attributeComponent, QgsExpression::quotedValue( value ) );
1267 else
1268 return QStringLiteral( "%1 = %2" ).arg( attributeComponent, QgsExpression::quotedValue( value, fieldType ) );
1269 }
1270}
1271
1276
1278{
1279 return mSourceSymbol.get();
1280}
1281
1286
1291
1296
1301
1303{
1304 setSourceColorRamp( ramp );
1305 double num = mCategories.count() - 1;
1306 double count = 0;
1307
1308 QgsRandomColorRamp *randomRamp = dynamic_cast<QgsRandomColorRamp *>( ramp );
1309 if ( randomRamp )
1310 {
1311 //ramp is a random colors ramp, so inform it of the total number of required colors
1312 //this allows the ramp to pregenerate a set of visually distinctive colors
1313 randomRamp->setTotalColorCount( mCategories.count() );
1314 }
1315
1316 for ( const QgsRendererCategory &cat : mCategories )
1317 {
1318 double value = count / num;
1319 cat.symbol()->setColor( mSourceColorRamp->color( value ) );
1320 count += 1;
1321 }
1322}
1323
1325{
1326 int i = 0;
1327 for ( const QgsRendererCategory &cat : mCategories )
1328 {
1329 QgsSymbol *symbol = sym->clone();
1330 symbol->setColor( cat.symbol()->color() );
1331 updateCategorySymbol( i, symbol );
1332 ++i;
1333 }
1334 setSourceSymbol( sym->clone() );
1335}
1336
1338{
1339 return true;
1340}
1341
1343{
1344 for ( const QgsRendererCategory &category : std::as_const( mCategories ) )
1345 {
1346 if ( category.uuid() == key )
1347 {
1348 return category.renderState();
1349 }
1350 }
1351
1352 return true;
1353}
1354
1356{
1357 bool ok = false;
1358 int i = 0;
1359 for ( i = 0; i < mCategories.size(); i++ )
1360 {
1361 if ( mCategories[i].uuid() == key )
1362 {
1363 ok = true;
1364 break;
1365 }
1366 }
1367
1368 if ( ok )
1369 updateCategorySymbol( i, symbol );
1370 else
1371 delete symbol;
1372}
1373
1374void QgsCategorizedSymbolRenderer::checkLegendSymbolItem( const QString &key, bool state )
1375{
1376 for ( int i = 0; i < mCategories.size(); i++ )
1377 {
1378 if ( mCategories[i].uuid() == key )
1379 {
1380 updateCategoryRenderState( i, state );
1381 break;
1382 }
1383 }
1384}
1385
1387{
1388 std::unique_ptr< QgsCategorizedSymbolRenderer > r;
1389 if ( renderer->type() == QLatin1String( "categorizedSymbol" ) )
1390 {
1391 r.reset( static_cast<QgsCategorizedSymbolRenderer *>( renderer->clone() ) );
1392 }
1393 else if ( renderer->type() == QLatin1String( "graduatedSymbol" ) )
1394 {
1395 const QgsGraduatedSymbolRenderer *graduatedSymbolRenderer = dynamic_cast<const QgsGraduatedSymbolRenderer *>( renderer );
1396 if ( graduatedSymbolRenderer )
1397 {
1398 r.reset( new QgsCategorizedSymbolRenderer( QString(), QgsCategoryList() ) );
1399 if ( graduatedSymbolRenderer->sourceSymbol() )
1400 r->setSourceSymbol( graduatedSymbolRenderer->sourceSymbol()->clone() );
1401 if ( graduatedSymbolRenderer->sourceColorRamp() )
1402 {
1403 r->setSourceColorRamp( graduatedSymbolRenderer->sourceColorRamp()->clone() );
1404 }
1405 r->setClassAttribute( graduatedSymbolRenderer->classAttribute() );
1406 }
1407 }
1408 else if ( renderer->type() == QLatin1String( "pointDisplacement" ) || renderer->type() == QLatin1String( "pointCluster" ) )
1409 {
1410 const QgsPointDistanceRenderer *pointDistanceRenderer = dynamic_cast<const QgsPointDistanceRenderer *>( renderer );
1411 if ( pointDistanceRenderer )
1412 r.reset( convertFromRenderer( pointDistanceRenderer->embeddedRenderer() ) );
1413 }
1414 else if ( renderer->type() == QLatin1String( "invertedPolygonRenderer" ) )
1415 {
1416 const QgsInvertedPolygonRenderer *invertedPolygonRenderer = dynamic_cast<const QgsInvertedPolygonRenderer *>( renderer );
1417 if ( invertedPolygonRenderer )
1418 r.reset( convertFromRenderer( invertedPolygonRenderer->embeddedRenderer() ) );
1419 }
1420 else if ( renderer->type() == QLatin1String( "embeddedSymbol" ) && layer )
1421 {
1422 const QgsEmbeddedSymbolRenderer *embeddedRenderer = dynamic_cast<const QgsEmbeddedSymbolRenderer *>( renderer );
1426 req.setNoAttributes();
1427 QgsFeatureIterator it = layer->getFeatures( req );
1428 QgsFeature feature;
1429 while ( it.nextFeature( feature ) && categories.size() < 2000 )
1430 {
1431 if ( feature.embeddedSymbol() )
1432 categories.append( QgsRendererCategory( feature.id(), feature.embeddedSymbol()->clone(), QString::number( feature.id() ) ) );
1433 }
1434 categories.append( QgsRendererCategory( QVariant(), embeddedRenderer->defaultSymbol()->clone(), QString() ) );
1435 r.reset( new QgsCategorizedSymbolRenderer( QStringLiteral( "$id" ), categories ) );
1436 }
1437
1438 // If not one of the specifically handled renderers, then just grab the symbol from the renderer
1439 // Could have applied this to specific renderer types (singleSymbol, graduatedSymbol)
1440
1441 if ( !r )
1442 {
1443 r = std::make_unique< QgsCategorizedSymbolRenderer >( QString(), QgsCategoryList() );
1444 QgsRenderContext context;
1445 QgsSymbolList symbols = const_cast<QgsFeatureRenderer *>( renderer )->symbols( context );
1446 if ( !symbols.isEmpty() )
1447 {
1448 r->setSourceSymbol( symbols.at( 0 )->clone() );
1449 }
1450 }
1451
1452 renderer->copyRendererData( r.get() );
1453
1454 return r.release();
1455}
1456
1461
1466
1467int QgsCategorizedSymbolRenderer::matchToSymbols( QgsStyle *style, Qgis::SymbolType type, QVariantList &unmatchedCategories, QStringList &unmatchedSymbols, const bool caseSensitive, const bool useTolerantMatch )
1468{
1469 if ( !style )
1470 return 0;
1471
1472 int matched = 0;
1473 unmatchedSymbols = style->symbolNames();
1474 const QSet< QString > allSymbolNames( unmatchedSymbols.begin(), unmatchedSymbols.end() );
1475
1476 const thread_local QRegularExpression tolerantMatchRe( QStringLiteral( "[^\\w\\d ]" ), QRegularExpression::UseUnicodePropertiesOption );
1477
1478 for ( int catIdx = 0; catIdx < mCategories.count(); ++catIdx )
1479 {
1480 const QVariant value = mCategories.at( catIdx ).value();
1481 const QString val = value.toString().trimmed();
1482 std::unique_ptr< QgsSymbol > symbol( style->symbol( val ) );
1483 // case-sensitive match
1484 if ( symbol && symbol->type() == type )
1485 {
1486 matched++;
1487 unmatchedSymbols.removeAll( val );
1488 updateCategorySymbol( catIdx, symbol.release() );
1489 continue;
1490 }
1491
1492 if ( !caseSensitive || useTolerantMatch )
1493 {
1494 QString testVal = val;
1495 if ( useTolerantMatch )
1496 testVal.replace( tolerantMatchRe, QString() );
1497
1498 bool foundMatch = false;
1499 for ( const QString &name : allSymbolNames )
1500 {
1501 QString testName = name.trimmed();
1502 if ( useTolerantMatch )
1503 testName.replace( tolerantMatchRe, QString() );
1504
1505 if ( testName == testVal || ( !caseSensitive && testName.trimmed().compare( testVal, Qt::CaseInsensitive ) == 0 ) )
1506 {
1507 // found a case-insensitive match
1508 std::unique_ptr< QgsSymbol > symbol( style->symbol( name ) );
1509 if ( symbol && symbol->type() == type )
1510 {
1511 matched++;
1512 unmatchedSymbols.removeAll( name );
1513 updateCategorySymbol( catIdx, symbol.release() );
1514 foundMatch = true;
1515 break;
1516 }
1517 }
1518 }
1519 if ( foundMatch )
1520 continue;
1521 }
1522
1523 unmatchedCategories << value;
1524 }
1525
1526 return matched;
1527}
1528
1529QgsCategoryList QgsCategorizedSymbolRenderer::createCategories( const QList<QVariant> &values, const QgsSymbol *symbol, QgsVectorLayer *layer, const QString &attributeName )
1530{
1531 QgsCategoryList cats;
1532 QVariantList vals = values;
1533 // sort the categories first
1534 QgsSymbolLayerUtils::sortVariantList( vals, Qt::AscendingOrder );
1535
1536 if ( layer && !attributeName.isNull() )
1537 {
1538 const QgsFields fields = layer->fields();
1539 for ( const QVariant &value : vals )
1540 {
1541 QgsSymbol *newSymbol = symbol->clone();
1542 if ( !QgsVariantUtils::isNull( value ) )
1543 {
1544 const int fieldIdx = fields.lookupField( attributeName );
1545 QString categoryName = displayString( value );
1546 if ( fieldIdx != -1 )
1547 {
1548 const QgsField field = fields.at( fieldIdx );
1549 const QgsEditorWidgetSetup setup = field.editorWidgetSetup();
1551 categoryName = formatter->representValue( layer, fieldIdx, setup.config(), QVariant(), value );
1552 }
1553 cats.append( QgsRendererCategory( value, newSymbol, categoryName, true ) );
1554 }
1555 }
1556 }
1557
1558 // add null (default) value
1559 QgsSymbol *newSymbol = symbol->clone();
1560 cats.append( QgsRendererCategory( QVariant(), newSymbol, QString(), true ) );
1561
1562 return cats;
1563}
@ NoGeometry
Geometry is not required. It may still be returned if e.g. required for a filter condition.
@ EmbeddedSymbols
Retrieve any embedded feature symbology.
QFlags< FeatureRendererFlag > FeatureRendererFlags
Flags controlling behavior of vector feature renderers.
Definition qgis.h:772
@ AffectsLabeling
If present, indicates that the renderer will participate in the map labeling problem.
SymbolType
Symbol types.
Definition qgis.h:574
@ Marker
Marker symbol.
@ AffectsLabeling
If present, indicates that the symbol will participate in the map labeling problem.
static QString nullRepresentation()
Returns the string used to represent the value NULL throughout QGIS.
static QgsFieldFormatterRegistry * fieldFormatterRegistry()
Gets the registry of available field formatters.
A vector of attributes.
void sortByValue(Qt::SortOrder order=Qt::AscendingOrder)
Sorts the existing categories by their value.
QString filter(const QgsFields &fields=QgsFields()) override
If a renderer does not require all the features this method may be overridden and return an expressio...
QgsSymbol * symbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
To be overridden.
void updateSymbols(QgsSymbol *sym)
Update all the symbols but leave categories and colors.
bool updateCategoryRenderState(int catIndex, bool render)
Changes the render state for the category with the specified index.
void setSourceColorRamp(QgsColorRamp *ramp)
Sets the source color ramp.
void stopRender(QgsRenderContext &context) override
Must be called when a render cycle has finished, to allow the renderer to clean up.
QgsSymbol * sourceSymbol()
Returns the renderer's source symbol, which is the base symbol used for the each categories' symbol b...
const QgsCategoryList & categories() const
Returns a list of all categories recognized by the renderer.
QString legendKeyToExpression(const QString &key, QgsVectorLayer *layer, bool &ok) const override
Attempts to convert the specified legend rule key to a QGIS expression matching the features displaye...
int matchToSymbols(QgsStyle *style, Qgis::SymbolType type, QVariantList &unmatchedCategories, QStringList &unmatchedSymbols, bool caseSensitive=true, bool useTolerantMatch=false)
Replaces category symbols with the symbols from a style that have a matching name and symbol type.
std::unique_ptr< QgsColorRamp > mSourceColorRamp
Q_DECL_DEPRECATED QgsSymbol * symbolForValue(const QVariant &value) const
Returns the matching symbol corresponding to an attribute value.
std::unique_ptr< QgsSymbol > mSourceSymbol
static QgsCategorizedSymbolRenderer * convertFromRenderer(const QgsFeatureRenderer *renderer, QgsVectorLayer *layer=nullptr)
Creates a new QgsCategorizedSymbolRenderer from an existing renderer.
void updateColorRamp(QgsColorRamp *ramp)
Update the color ramp used and all symbols colors.
QgsDataDefinedSizeLegend * dataDefinedSizeLegend() const
Returns configuration of appearance of legend when using data-defined size for marker symbols.
static QgsCategoryList createCategories(const QVariantList &values, const QgsSymbol *symbol, QgsVectorLayer *layer=nullptr, const QString &fieldName=QString())
Create categories for a list of values.
QHash< QString, QgsSymbol * > mSymbolHash
hashtable for faster access to symbols
bool filterNeedsGeometry() const override
Returns true if this renderer requires the geometry to apply the filter.
QSet< QString > usedAttributes(const QgsRenderContext &context) const override
Returns a list of attributes required by this renderer.
void setSourceSymbol(QgsSymbol *sym)
Sets the source symbol for the renderer, which is the base symbol used for the each categories' symbo...
void startRender(QgsRenderContext &context, const QgsFields &fields) override
Must be called when a new render cycle is started.
QgsSymbolList symbols(QgsRenderContext &context) const override
Returns list of symbols used by the renderer.
int categoryIndexForValue(const QVariant &val)
Returns the index for the category with the specified value (or -1 if not found).
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a categorized renderer from an XML element.
bool updateCategorySymbol(int catIndex, QgsSymbol *symbol)
Changes the symbol for the category with the specified index.
bool accept(QgsStyleEntityVisitorInterface *visitor) const override
Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer...
void setLegendSymbolItem(const QString &key, QgsSymbol *symbol) override
Sets the symbol to be used for a legend symbol item.
std::unique_ptr< QgsExpression > mExpression
std::unique_ptr< QgsDataDefinedSizeLegend > mDataDefinedSizeLegend
bool legendSymbolItemChecked(const QString &key) override
Returns true if the legend symbology item with the specified key is checked.
bool legendSymbolItemsCheckable() const override
Returns true if symbology items in legend are checkable.
void addCategory(const QgsRendererCategory &category)
Adds a new category to the renderer.
QgsCategorizedSymbolRenderer(const QString &attrName=QString(), const QgsCategoryList &categories=QgsCategoryList())
Constructor for QgsCategorizedSymbolRenderer.
void sortByLabel(Qt::SortOrder order=Qt::AscendingOrder)
Sorts the existing categories by their label.
QgsSymbol * originalSymbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Returns symbol for feature.
int mAttrNum
attribute index (derived from attribute name in startRender)
QgsLegendSymbolList legendSymbolItems() const override
Returns a list of symbology items for the legend.
void moveCategory(int from, int to)
Moves an existing category at index position from to index position to.
QDomElement save(QDomDocument &doc, const QgsReadWriteContext &context) override
Stores renderer properties to an XML element.
bool deleteCategory(int catIndex)
Deletes the category with the specified index from the renderer.
Qgis::FeatureRendererFlags flags() const override
Returns flags associated with the renderer.
Q_DECL_DEPRECATED QgsSymbol * skipRender()
void checkLegendSymbolItem(const QString &key, bool state=true) override
Sets whether the legend symbology item with the specified ley should be checked.
QString dump() const override
Returns debug information about this renderer.
QSet< QString > legendKeysForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Returns legend keys matching a specified feature.
QgsColorRamp * sourceColorRamp()
Returns the source color ramp, from which each categories' color is derived.
bool updateCategoryValue(int catIndex, const QVariant &value)
Changes the value for the category with the specified index.
void toSld(QDomDocument &doc, QDomElement &element, const QVariantMap &props=QVariantMap()) const override
used from subclasses to create SLD Rule elements following SLD v1.1 specs
QgsCategorizedSymbolRenderer * clone() const override
Create a deep copy of this renderer.
void deleteAllCategories()
Deletes all existing categories from the renderer.
void setDataDefinedSizeLegend(QgsDataDefinedSizeLegend *settings)
Configures appearance of legend when renderer is configured to use data-defined size for marker symbo...
bool updateCategoryLabel(int catIndex, const QString &label)
Changes the label for the category with the specified index.
static QString displayString(const QVariant &value, int precision=-1)
Returns a localized representation of value with the given precision, if precision is -1 then precisi...
~QgsCategorizedSymbolRenderer() override
int categoryIndexForLabel(const QString &val)
Returns the index of the category with the specified label (or -1 if the label was not found,...
Abstract base class for color ramps.
virtual QgsColorRamp * clone() const =0
Creates a clone of the color ramp.
Object that keeps configuration of appearance of marker symbol's data-defined size in legend.
static QgsDataDefinedSizeLegend * readXml(const QDomElement &elem, const QgsReadWriteContext &context) SIP_FACTORY
Creates instance from given element and returns it (caller takes ownership). Returns nullptr on error...
void updateFromSymbolAndProperty(const QgsMarkerSymbol *symbol, const QgsProperty &ddSize)
Updates the list of classes, source symbol and title label from given symbol and property.
QgsLegendSymbolList legendSymbolList() const
Generates legend symbol items according to the configuration.
Holder for the widget type and its configuration for a field.
QVariantMap config() const
A vector feature renderer which uses embedded feature symbology to render per-feature symbols.
static QList< QgsExpressionContextScope * > globalProjectLayerScopes(const QgsMapLayer *layer)
Creates a list of three scopes: global, layer's project and layer.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void appendScopes(const QList< QgsExpressionContextScope * > &scopes)
Appends a list of scopes to the end of the context.
Class for parsing and evaluation of expressions (formerly called "search strings").
bool prepare(const QgsExpressionContext *context)
Gets the expression ready for evaluation - find out column indexes.
static QString quotedValue(const QVariant &value)
Returns a string representation of a literal value, including appropriate quotations where required.
static QString quoteFieldExpression(const QString &expression, const QgsVectorLayer *layer)
Validate if the expression is a field in the layer and ensure it is quoted.
bool hasParserError() const
Returns true if an error occurred when parsing the input expression.
bool isField() const
Checks whether an expression consists only of a single field reference.
QSet< QString > referencedColumns() const
Gets list of columns referenced by the expression.
static QString quotedColumnRef(QString name)
Returns a quoted column reference (in double quotes)
const QgsExpressionNode * rootNode() const
Returns the root node of the expression.
bool needsGeometry() const
Returns true if the expression uses feature geometry for some computation.
Wrapper for iterator of features from vector data provider or vector layer.
bool nextFeature(QgsFeature &f)
Fetch next feature and stores in f, returns true on success.
Abstract base class for all 2D vector feature renderers.
virtual void stopRender(QgsRenderContext &context)
Must be called when a render cycle has finished, to allow the renderer to clean up.
QString type() const
void copyRendererData(QgsFeatureRenderer *destRenderer) const
Clones generic renderer data to another renderer.
static void convertSymbolRotation(QgsSymbol *symbol, const QString &field)
void saveRendererData(QDomDocument &doc, QDomElement &element, const QgsReadWriteContext &context)
Saves generic renderer data into the specified element.
virtual const QgsFeatureRenderer * embeddedRenderer() const
Returns the current embedded renderer (subrenderer) for this feature renderer.
virtual void startRender(QgsRenderContext &context, const QgsFields &fields)
Must be called when a new render cycle is started.
static void convertSymbolSizeScale(QgsSymbol *symbol, Qgis::ScaleMethod method, const QString &field)
virtual QgsFeatureRenderer * clone() const =0
Create a deep copy of this renderer.
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & setFlags(Qgis::FeatureRequestFlags flags)
Sets flags that affect how features will be fetched.
QgsFeatureRequest & setNoAttributes()
Set that no attributes will be fetched.
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
QgsFeatureId id
Definition qgsfeature.h:66
const QgsSymbol * embeddedSymbol() const
Returns the feature's embedded symbology, or nullptr if the feature has no embedded symbol.
QgsFieldFormatter * fieldFormatter(const QString &id) const
Gets a field formatter by its id.
A field formatter helps to handle and display values for a field.
virtual QString representValue(QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value) const
Create a pretty String representation of the value.
Encapsulate a field in an attribute table or data source.
Definition qgsfield.h:53
QMetaType::Type type
Definition qgsfield.h:60
bool isNumeric
Definition qgsfield.h:56
QgsEditorWidgetSetup editorWidgetSetup() const
Gets the editor widget setup for the field.
Definition qgsfield.cpp:740
Container of fields for a vector layer.
Definition qgsfields.h:46
QgsField at(int i) const
Returns the field at particular index (must be in range 0..N-1).
Q_INVOKABLE int lookupField(const QString &fieldName) const
Looks up field's index from the field name.
A vector feature renderer which uses numeric attributes to classify features into different ranges.
QgsSymbol * sourceSymbol()
Returns the renderer's source symbol, which is the base symbol used for the each classes' symbol befo...
QgsColorRamp * sourceColorRamp()
Returns the source color ramp, from which each classes' color is derived.
QString classAttribute() const
Returns the attribute name (or expression) used for the classification.
void setSourceSymbol(QgsSymbol *sym)
Sets the source symbol for the renderer, which is the base symbol used for the each classes' symbol b...
QgsInvertedPolygonRenderer is a polygon-only feature renderer used to display features inverted,...
The class stores information about one class/rule of a vector layer renderer in a unified way that ca...
A marker symbol type, for rendering Point and MultiPoint geometries.
QgsProperty dataDefinedSize() const
Returns data defined size for whole symbol (including all symbol layers).
const QgsFeatureRenderer * embeddedRenderer() const override
Returns the current embedded renderer (subrenderer) for this feature renderer.
An abstract base class for distance based point renderers (e.g., clusterer and displacement renderers...
const QgsFeatureRenderer * embeddedRenderer() const override
Returns the current embedded renderer (subrenderer) for this feature renderer.
A store for object properties.
bool isActive() const
Returns whether the property is currently active.
Totally random color ramp.
virtual void setTotalColorCount(int colorCount)
Sets the desired total number of unique colors for the resultant ramp.
The class is used as a container of context for various read/write operations on other objects.
Contains information about the context of a rendering operation.
double rendererScale() const
Returns the renderer map scale.
QgsExpressionContext & expressionContext()
Gets the expression context.
Represents an individual category (class) from a QgsCategorizedSymbolRenderer.
void setRenderState(bool render)
Sets whether the category is currently enabled and should be rendered.
std::unique_ptr< QgsSymbol > mSymbol
QgsSymbol * symbol() const
Returns the symbol which will be used to render this category.
void setSymbol(QgsSymbol *s)
Sets the symbol which will be used to render this category.
QString uuid() const
Returns the unique identifier for this category.
QgsRendererCategory()=default
bool renderState() const
Returns true if the category is currently enabled and should be rendered.
QString dump() const
Returns a string representing the categories settings, used for debugging purposes only.
void setLabel(const QString &label)
Sets the label for this category, which is used to represent the category within legends and the laye...
void toSld(QDomDocument &doc, QDomElement &element, QVariantMap props) const
Converts the category to a matching SLD rule, within the specified DOM document and element.
void setValue(const QVariant &value)
Sets the value corresponding to this category.
QVariant value() const
Returns the value corresponding to this category.
QString label() const
Returns the label for this category, which is used to represent the category within legends and the l...
QgsRendererCategory & operator=(QgsRendererCategory cat)
A color ramp entity for QgsStyle databases.
Definition qgsstyle.h:1428
An interface for classes which can visit style entity (e.g.
virtual bool visit(const QgsStyleEntityVisitorInterface::StyleLeaf &entity)
Called when the visitor will visit a style entity.
A symbol entity for QgsStyle databases.
Definition qgsstyle.h:1396
QgsSymbol * symbol(const QString &name)
Returns a NEW copy of symbol.
Definition qgsstyle.cpp:318
QStringList symbolNames() const
Returns a list of names of symbols.
Definition qgsstyle.cpp:340
static void sortVariantList(QList< QVariant > &list, Qt::SortOrder order)
Sorts the passed list in requested order.
static void applyScaleDependency(QDomDocument &doc, QDomElement &ruleElem, QVariantMap &props)
Checks if the properties contain scaleMinDenom and scaleMaxDenom, if available, they are added into t...
static bool createFunctionElement(QDomDocument &doc, QDomElement &element, const QString &function)
static QgsColorRamp * loadColorRamp(QDomElement &element)
Creates a color ramp from the settings encoded in an XML element.
static bool hasSldSymbolizer(const QDomElement &element)
Returns true if a DOM element contains an SLD Symbolizer element.
static Qgis::ScaleMethod decodeScaleMethod(const QString &str)
Decodes a symbol scale method from a string.
static QDomElement saveColorRamp(const QString &name, QgsColorRamp *ramp, QDomDocument &doc)
Encodes a color ramp's settings to an XML element.
static void clearSymbolMap(QgsSymbolMap &symbols)
static QgsSymbolMap loadSymbols(QDomElement &element, const QgsReadWriteContext &context)
Reads a collection of symbols from XML and returns them in a map. Caller is responsible for deleting ...
static QDomElement saveSymbols(QgsSymbolMap &symbols, const QString &tagName, QDomDocument &doc, const QgsReadWriteContext &context)
Writes a collection of symbols to XML with specified tagName for the top-level element.
Abstract base class for all rendered symbols.
Definition qgssymbol.h:231
void setColor(const QColor &color) const
Sets the color for the symbol.
QSet< QString > usedAttributes(const QgsRenderContext &context) const
Returns a list of attributes required to render this feature.
virtual QgsSymbol * clone() const =0
Returns a deep copy of this symbol.
static bool isNull(const QVariant &variant, bool silenceNullWarnings=false)
Returns true if the specified variant should be considered a NULL value.
Represents a vector layer which manages a vector based data sets.
QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const FINAL
Queries the layer for features specified in request.
bool qgsVariantLessThan(const QVariant &lhs, const QVariant &rhs)
Compares two QVariant values and returns whether the first is less than the second.
Definition qgis.cpp:121
bool qgsVariantGreaterThan(const QVariant &lhs, const QVariant &rhs)
Compares two QVariant values and returns whether the first is greater than the second.
Definition qgis.cpp:189
bool labelGreaterThan(const QgsRendererCategory &c1, const QgsRendererCategory &c2)
bool valueLessThan(const QgsRendererCategory &c1, const QgsRendererCategory &c2)
bool valueGreaterThan(const QgsRendererCategory &c1, const QgsRendererCategory &c2)
bool labelLessThan(const QgsRendererCategory &c1, const QgsRendererCategory &c2)
QList< QgsRendererCategory > QgsCategoryList
QList< QgsLegendSymbolItem > QgsLegendSymbolList
#define QgsDebugMsgLevel(str, level)
Definition qgslogger.h:39
#define QgsDebugError(str)
Definition qgslogger.h:38
#define RENDERER_TAG_NAME
Definition qgsrenderer.h:53
QMap< QString, QgsSymbol * > QgsSymbolMap
Definition qgsrenderer.h:48
QList< QgsSymbol * > QgsSymbolList
Definition qgsrenderer.h:47
int precision
Contains information relating to the style entity currently being visited.