QGIS API Documentation 3.99.0-Master (d270888f95f)
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qgsrasterlayerelevationproperties.cpp
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1/***************************************************************************
2 qgsrasterlayerelevationproperties.cpp
3 ---------------
4 begin : February 2022
5 copyright : (C) 2022 by Nyall Dawson
6 email : nyall dot dawson dot com
7 ***************************************************************************/
8
9/***************************************************************************
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 ***************************************************************************/
17
18#include "qgsrasterlayerelevationproperties.h"
19
20#include "qgsapplication.h"
21#include "qgscolorschemeregistry.h"
22#include "qgsexpressioncontextutils.h"
23#include "qgsfillsymbol.h"
24#include "qgsfillsymbollayer.h"
25#include "qgslinesymbol.h"
26#include "qgslinesymbollayer.h"
27#include "qgsrasterlayer.h"
28#include "qgssymbollayerutils.h"
29
30#include <QString>
31
32#include "moc_qgsrasterlayerelevationproperties.cpp"
33
34using namespace Qt::StringLiterals;
35
36QgsRasterLayerElevationProperties::QgsRasterLayerElevationProperties( QObject *parent )
37 : QgsMapLayerElevationProperties( parent )
38{
39 const QColor color = QgsApplication::colorSchemeRegistry()->fetchRandomStyleColor();
40 setDefaultProfileLineSymbol( color );
41 setDefaultProfileFillSymbol( color );
42}
43
44QgsRasterLayerElevationProperties::~QgsRasterLayerElevationProperties() = default;
45
46bool QgsRasterLayerElevationProperties::hasElevation() const
47{
48 return mEnabled;
49}
50
51QDomElement QgsRasterLayerElevationProperties::writeXml( QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context )
52{
53 QDomElement element = document.createElement( u"elevation"_s );
54 element.setAttribute( u"enabled"_s, mEnabled ? u"1"_s : u"0"_s );
55 element.setAttribute( u"mode"_s, qgsEnumValueToKey( mMode ) );
56 element.setAttribute( u"symbology"_s, qgsEnumValueToKey( mSymbology ) );
57 if ( !std::isnan( mElevationLimit ) )
58 element.setAttribute( u"elevationLimit"_s, qgsDoubleToString( mElevationLimit ) );
59
60 writeCommonProperties( element, document, context );
61
62 switch ( mMode )
63 {
64 case Qgis::RasterElevationMode::FixedElevationRange:
65 element.setAttribute( u"lower"_s, qgsDoubleToString( mFixedRange.lower() ) );
66 element.setAttribute( u"upper"_s, qgsDoubleToString( mFixedRange.upper() ) );
67 element.setAttribute( u"includeLower"_s, mFixedRange.includeLower() ? "1" : "0" );
68 element.setAttribute( u"includeUpper"_s, mFixedRange.includeUpper() ? "1" : "0" );
69 break;
70
71 case Qgis::RasterElevationMode::FixedRangePerBand:
72 {
73 QDomElement ranges = document.createElement( u"ranges"_s );
74 for ( auto it = mRangePerBand.constBegin(); it != mRangePerBand.constEnd(); ++it )
75 {
76 QDomElement range = document.createElement( u"range"_s );
77 range.setAttribute( u"band"_s, it.key() );
78 range.setAttribute( u"lower"_s, qgsDoubleToString( it.value().lower() ) );
79 range.setAttribute( u"upper"_s, qgsDoubleToString( it.value().upper() ) );
80 range.setAttribute( u"includeLower"_s, it.value().includeLower() ? "1" : "0" );
81 range.setAttribute( u"includeUpper"_s, it.value().includeUpper() ? "1" : "0" );
82 ranges.appendChild( range );
83 }
84 element.appendChild( ranges );
85 break;
86 }
87
88 case Qgis::RasterElevationMode::DynamicRangePerBand:
89 break;
90
91 case Qgis::RasterElevationMode::RepresentsElevationSurface:
92 element.setAttribute( u"band"_s, mBandNumber );
93 break;
94 }
95
96 QDomElement profileLineSymbolElement = document.createElement( u"profileLineSymbol"_s );
97 profileLineSymbolElement.appendChild( QgsSymbolLayerUtils::saveSymbol( QString(), mProfileLineSymbol.get(), document, context ) );
98 element.appendChild( profileLineSymbolElement );
99
100 QDomElement profileFillSymbolElement = document.createElement( u"profileFillSymbol"_s );
101 profileFillSymbolElement.appendChild( QgsSymbolLayerUtils::saveSymbol( QString(), mProfileFillSymbol.get(), document, context ) );
102 element.appendChild( profileFillSymbolElement );
103
104 parentElement.appendChild( element );
105 return element;
106}
107
108bool QgsRasterLayerElevationProperties::readXml( const QDomElement &element, const QgsReadWriteContext &context )
109{
110 const QDomElement elevationElement = element.firstChildElement( u"elevation"_s ).toElement();
111 mEnabled = elevationElement.attribute( u"enabled"_s, u"0"_s ).toInt();
112 mMode = qgsEnumKeyToValue( elevationElement.attribute( u"mode"_s ), Qgis::RasterElevationMode::RepresentsElevationSurface );
113 mSymbology = qgsEnumKeyToValue( elevationElement.attribute( u"symbology"_s ), Qgis::ProfileSurfaceSymbology::Line );
114 if ( elevationElement.hasAttribute( u"elevationLimit"_s ) )
115 mElevationLimit = elevationElement.attribute( u"elevationLimit"_s ).toDouble();
116 else
117 mElevationLimit = std::numeric_limits< double >::quiet_NaN();
118
119 readCommonProperties( elevationElement, context );
120
121 switch ( mMode )
122 {
123 case Qgis::RasterElevationMode::FixedElevationRange:
124 {
125 const double lower = elevationElement.attribute( u"lower"_s ).toDouble();
126 const double upper = elevationElement.attribute( u"upper"_s ).toDouble();
127 const bool includeLower = elevationElement.attribute( u"includeLower"_s ).toInt();
128 const bool includeUpper = elevationElement.attribute( u"includeUpper"_s ).toInt();
129 mFixedRange = QgsDoubleRange( lower, upper, includeLower, includeUpper );
130 break;
131 }
132
133 case Qgis::RasterElevationMode::FixedRangePerBand:
134 {
135 mRangePerBand.clear();
136
137 const QDomNodeList ranges = elevationElement.firstChildElement( u"ranges"_s ).childNodes();
138 for ( int i = 0; i < ranges.size(); ++i )
139 {
140 const QDomElement rangeElement = ranges.at( i ).toElement();
141 const int band = rangeElement.attribute( u"band"_s ).toInt();
142 const double lower = rangeElement.attribute( u"lower"_s ).toDouble();
143 const double upper = rangeElement.attribute( u"upper"_s ).toDouble();
144 const bool includeLower = rangeElement.attribute( u"includeLower"_s ).toInt();
145 const bool includeUpper = rangeElement.attribute( u"includeUpper"_s ).toInt();
146 mRangePerBand.insert( band, QgsDoubleRange( lower, upper, includeLower, includeUpper ) );
147 }
148 break;
149 }
150
151 case Qgis::RasterElevationMode::DynamicRangePerBand:
152 break;
153
154 case Qgis::RasterElevationMode::RepresentsElevationSurface:
155 mBandNumber = elevationElement.attribute( u"band"_s, u"1"_s ).toInt();
156 break;
157 }
158
159 const QColor defaultColor = QgsApplication::colorSchemeRegistry()->fetchRandomStyleColor();
160
161 const QDomElement profileLineSymbolElement = elevationElement.firstChildElement( u"profileLineSymbol"_s ).firstChildElement( u"symbol"_s );
162 mProfileLineSymbol = QgsSymbolLayerUtils::loadSymbol< QgsLineSymbol >( profileLineSymbolElement, context );
163 if ( !mProfileLineSymbol )
164 setDefaultProfileLineSymbol( defaultColor );
165
166 const QDomElement profileFillSymbolElement = elevationElement.firstChildElement( u"profileFillSymbol"_s ).firstChildElement( u"symbol"_s );
167 mProfileFillSymbol = QgsSymbolLayerUtils::loadSymbol< QgsFillSymbol >( profileFillSymbolElement, context );
168 if ( !mProfileFillSymbol )
169 setDefaultProfileFillSymbol( defaultColor );
170
171 return true;
172}
173
174QgsRasterLayerElevationProperties *QgsRasterLayerElevationProperties::clone() const
175{
176 auto res = std::make_unique< QgsRasterLayerElevationProperties >( nullptr );
177 res->setEnabled( mEnabled );
178 res->setMode( mMode );
179 res->setProfileLineSymbol( mProfileLineSymbol->clone() );
180 res->setProfileFillSymbol( mProfileFillSymbol->clone() );
181 res->setProfileSymbology( mSymbology );
182 res->setElevationLimit( mElevationLimit );
183 res->setBandNumber( mBandNumber );
184 res->setFixedRange( mFixedRange );
185 res->setFixedRangePerBand( mRangePerBand );
186 res->copyCommonProperties( this );
187 return res.release();
188}
189
190QString QgsRasterLayerElevationProperties::htmlSummary() const
191{
192 QStringList properties;
193 switch ( mMode )
194 {
195 case Qgis::RasterElevationMode::FixedElevationRange:
196 properties << tr( "Elevation range: %1 to %2" ).arg( mFixedRange.lower() ).arg( mFixedRange.upper() );
197 break;
198
199 case Qgis::RasterElevationMode::FixedRangePerBand:
200 {
201 for ( auto it = mRangePerBand.constBegin(); it != mRangePerBand.constEnd(); ++it )
202 {
203 properties << tr( "Elevation for band %1: %2 to %3" ).arg( it.key() ).arg( it.value().lower() ).arg( it.value().upper() );
204 }
205 break;
206 }
207
208 case Qgis::RasterElevationMode::DynamicRangePerBand:
209 break;
210
211 case Qgis::RasterElevationMode::RepresentsElevationSurface:
212 properties << tr( "Elevation band: %1" ).arg( mBandNumber );
213 properties << tr( "Scale: %1" ).arg( mZScale );
214 properties << tr( "Offset: %1" ).arg( mZOffset );
215 break;
216 }
217
218 return u"<li>%1</li>"_s.arg( properties.join( "</li><li>"_L1 ) );
219}
220
221bool QgsRasterLayerElevationProperties::isVisibleInZRange( const QgsDoubleRange &range, QgsMapLayer *layer ) const
222{
223 switch ( mMode )
224 {
225 case Qgis::RasterElevationMode::FixedElevationRange:
226 return mFixedRange.overlaps( range );
227
228 case Qgis::RasterElevationMode::FixedRangePerBand:
229 {
230 for ( auto it = mRangePerBand.constBegin(); it != mRangePerBand.constEnd(); ++it )
231 {
232 if ( it.value().overlaps( range ) )
233 return true;
234 }
235 return false;
236 }
237
238 case Qgis::RasterElevationMode::DynamicRangePerBand:
239 {
240 if ( QgsRasterLayer *rl = qobject_cast< QgsRasterLayer * >( layer ) )
241 {
242 QgsExpressionContext context;
243 context.appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( layer ) );
244 QgsExpressionContextScope *bandScope = new QgsExpressionContextScope();
245 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band"_s, 1, true, false, tr( "Band number" ) ) );
246 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_name"_s, rl->dataProvider()->displayBandName( 1 ), true, false, tr( "Band name" ) ) );
247 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_description"_s, rl->dataProvider()->bandDescription( 1 ), true, false, tr( "Band description" ) ) );
248 context.appendScope( bandScope );
249
250 QgsProperty lowerProperty = mDataDefinedProperties.property( Property::RasterPerBandLowerElevation );
251 QgsProperty upperProperty = mDataDefinedProperties.property( Property::RasterPerBandUpperElevation );
252 lowerProperty.prepare( context );
253 upperProperty.prepare( context );
254 for ( int band = 1; band <= rl->bandCount(); ++band )
255 {
256 bandScope->setVariable( u"band"_s, band );
257 bandScope->setVariable( u"band_name"_s, rl->dataProvider()->displayBandName( band ) );
258 bandScope->setVariable( u"band_description"_s, rl->dataProvider()->bandDescription( band ) );
259
260 bool ok = false;
261 const double lower = lowerProperty.valueAsDouble( context, 0, &ok );
262 if ( !ok )
263 continue;
264 const double upper = upperProperty.valueAsDouble( context, 0, &ok );
265 if ( !ok )
266 continue;
267
268 if ( QgsDoubleRange( lower, upper ).overlaps( range ) )
269 return true;
270 }
271 }
272 return false;
273 }
274
275 case Qgis::RasterElevationMode::RepresentsElevationSurface:
276 // TODO -- test actual raster z range
277 return true;
278 }
279 BUILTIN_UNREACHABLE
280}
281
282QgsDoubleRange QgsRasterLayerElevationProperties::calculateZRange( QgsMapLayer *layer ) const
283{
284 switch ( mMode )
285 {
286 case Qgis::RasterElevationMode::FixedElevationRange:
287 return mFixedRange;
288
289 case Qgis::RasterElevationMode::FixedRangePerBand:
290 {
291 double lower = std::numeric_limits< double >::max();
292 double upper = std::numeric_limits< double >::min();
293 bool includeLower = true;
294 bool includeUpper = true;
295 for ( auto it = mRangePerBand.constBegin(); it != mRangePerBand.constEnd(); ++it )
296 {
297 if ( it.value().lower() < lower )
298 {
299 lower = it.value().lower();
300 includeLower = it.value().includeLower();
301 }
302 else if ( !includeLower && it.value().lower() == lower && it.value().includeLower() )
303 {
304 includeLower = true;
305 }
306 if ( it.value().upper() > upper )
307 {
308 upper = it.value().upper();
309 includeUpper = it.value().includeUpper();
310 }
311 else if ( !includeUpper && it.value().upper() == upper && it.value().includeUpper() )
312 {
313 includeUpper = true;
314 }
315 }
316 return QgsDoubleRange( lower, upper, includeLower, includeUpper );
317 }
318
319 case Qgis::RasterElevationMode::DynamicRangePerBand:
320 {
321 if ( QgsRasterLayer *rl = qobject_cast< QgsRasterLayer * >( layer ) )
322 {
323 QgsExpressionContext context;
324 context.appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( layer ) );
325 QgsExpressionContextScope *bandScope = new QgsExpressionContextScope();
326 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band"_s, 1, true, false, tr( "Band number" ) ) );
327 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_name"_s, rl->dataProvider()->displayBandName( 1 ), true, false, tr( "Band name" ) ) );
328 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_description"_s, rl->dataProvider()->bandDescription( 1 ), true, false, tr( "Band description" ) ) );
329 context.appendScope( bandScope );
330
331 QgsProperty lowerProperty = mDataDefinedProperties.property( Property::RasterPerBandLowerElevation );
332 QgsProperty upperProperty = mDataDefinedProperties.property( Property::RasterPerBandUpperElevation );
333 lowerProperty.prepare( context );
334 upperProperty.prepare( context );
335 double minLower = std::numeric_limits<double>::max();
336 double maxUpper = std::numeric_limits<double>::lowest();
337 for ( int band = 1; band <= rl->bandCount(); ++band )
338 {
339 bandScope->setVariable( u"band"_s, band );
340 bandScope->setVariable( u"band_name"_s, rl->dataProvider()->displayBandName( band ) );
341 bandScope->setVariable( u"band_description"_s, rl->dataProvider()->bandDescription( band ) );
342
343 bool ok = false;
344 const double lower = lowerProperty.valueAsDouble( context, 0, &ok );
345 if ( !ok )
346 continue;
347 const double upper = upperProperty.valueAsDouble( context, 0, &ok );
348 if ( !ok )
349 continue;
350
351 minLower = std::min( minLower, lower );
352 maxUpper = std::max( maxUpper, upper );
353 }
354 return ( minLower == std::numeric_limits<double>::max() && maxUpper == std::numeric_limits<double>::lowest() ) ? QgsDoubleRange() : QgsDoubleRange( minLower, maxUpper );
355 }
356 return QgsDoubleRange();
357 }
358
359 case Qgis::RasterElevationMode::RepresentsElevationSurface:
360 // TODO -- determine actual z range from raster statistics
361 return QgsDoubleRange();
362 }
363 BUILTIN_UNREACHABLE
364}
365
366QList<double> QgsRasterLayerElevationProperties::significantZValues( QgsMapLayer *layer ) const
367{
368 switch ( mMode )
369 {
370 case Qgis::RasterElevationMode::FixedElevationRange:
371 {
372 if ( !mFixedRange.isInfinite() && mFixedRange.lower() != mFixedRange.upper() )
373 return { mFixedRange.lower(), mFixedRange.upper() };
374 else if ( !mFixedRange.isInfinite() )
375 return { mFixedRange.lower() };
376
377 return {};
378 }
379
380 case Qgis::RasterElevationMode::FixedRangePerBand:
381 {
382 QList< double > res;
383 for ( auto it = mRangePerBand.constBegin(); it != mRangePerBand.constEnd(); ++it )
384 {
385 if ( it.value().isInfinite() )
386 continue;
387
388 if ( !res.contains( it.value().lower( ) ) )
389 res.append( it.value().lower() );
390 if ( !res.contains( it.value().upper( ) ) )
391 res.append( it.value().upper() );
392 }
393 std::sort( res.begin(), res.end() );
394 return res;
395 }
396
397 case Qgis::RasterElevationMode::DynamicRangePerBand:
398 {
399 QList< double > res;
400 if ( QgsRasterLayer *rl = qobject_cast< QgsRasterLayer * >( layer ) )
401 {
402 QgsExpressionContext context;
403 context.appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( layer ) );
404 QgsExpressionContextScope *bandScope = new QgsExpressionContextScope();
405 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band"_s, 1, true, false, tr( "Band number" ) ) );
406 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_name"_s, rl->dataProvider()->displayBandName( 1 ), true, false, tr( "Band name" ) ) );
407 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_description"_s, rl->dataProvider()->bandDescription( 1 ), true, false, tr( "Band description" ) ) );
408 context.appendScope( bandScope );
409
410 QgsProperty lowerProperty = mDataDefinedProperties.property( Property::RasterPerBandLowerElevation );
411 QgsProperty upperProperty = mDataDefinedProperties.property( Property::RasterPerBandUpperElevation );
412 lowerProperty.prepare( context );
413 upperProperty.prepare( context );
414 for ( int band = 1; band <= rl->bandCount(); ++band )
415 {
416 bandScope->setVariable( u"band"_s, band );
417 bandScope->setVariable( u"band_name"_s, rl->dataProvider()->displayBandName( band ) );
418 bandScope->setVariable( u"band_description"_s, rl->dataProvider()->bandDescription( band ) );
419
420 bool ok = false;
421 const double lower = lowerProperty.valueAsDouble( context, 0, &ok );
422 if ( ok && !res.contains( lower ) )
423 res.append( lower );
424 const double upper = upperProperty.valueAsDouble( context, 0, &ok );
425 if ( ok && !res.contains( upper ) )
426 res.append( upper );
427 }
428 }
429 return res;
430 }
431
432 case Qgis::RasterElevationMode::RepresentsElevationSurface:
433 return {};
434 }
435 BUILTIN_UNREACHABLE
436}
437
442
460
461void QgsRasterLayerElevationProperties::setEnabled( bool enabled )
462{
463 if ( enabled == mEnabled )
464 return;
465
466 mEnabled = enabled;
467 emit changed();
468 emit profileGenerationPropertyChanged();
469}
470
475
476void QgsRasterLayerElevationProperties::setMode( Qgis::RasterElevationMode mode )
477{
478 if ( mMode == mode )
479 return;
480
481 mMode = mode;
482 emit changed();
483}
484
485void QgsRasterLayerElevationProperties::setBandNumber( int band )
486{
487 if ( mBandNumber == band )
488 return;
489
490 mBandNumber = band;
491 emit changed();
492 emit profileGenerationPropertyChanged();
493}
494
495QgsDoubleRange QgsRasterLayerElevationProperties::elevationRangeForPixelValue( QgsRasterLayer *layer, int band, double pixelValue ) const
496{
497 if ( !mEnabled || std::isnan( pixelValue ) )
498 return QgsDoubleRange();
499
500 switch ( mMode )
501 {
502 case Qgis::RasterElevationMode::FixedElevationRange:
503 return mFixedRange;
504
505 case Qgis::RasterElevationMode::FixedRangePerBand:
506 {
507 auto it = mRangePerBand.constFind( band );
508 if ( it != mRangePerBand.constEnd() )
509 return it.value();
510 return QgsDoubleRange();
511 }
512
513 case Qgis::RasterElevationMode::DynamicRangePerBand:
514 {
515 if ( layer && band > 0 && band <= layer->bandCount() )
516 {
517 QgsExpressionContext context;
518 context.appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( layer ) );
519 QgsExpressionContextScope *bandScope = new QgsExpressionContextScope();
520 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band"_s, band, true, false, tr( "Band number" ) ) );
521 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_name"_s, layer->dataProvider()->displayBandName( band ), true, false, tr( "Band name" ) ) );
522 bandScope->addVariable( QgsExpressionContextScope::StaticVariable( u"band_description"_s, layer->dataProvider()->bandDescription( band ), true, false, tr( "Band description" ) ) );
523 context.appendScope( bandScope );
524
525 QgsProperty lowerProperty = mDataDefinedProperties.property( Property::RasterPerBandLowerElevation );
526 QgsProperty upperProperty = mDataDefinedProperties.property( Property::RasterPerBandUpperElevation );
527 lowerProperty.prepare( context );
528 upperProperty.prepare( context );
529
530 bool ok = false;
531 const double lower = lowerProperty.valueAsDouble( context, 0, &ok );
532 if ( !ok )
533 return QgsDoubleRange();
534 const double upper = upperProperty.valueAsDouble( context, 0, &ok );
535 if ( !ok )
536 return QgsDoubleRange();
537
538 return QgsDoubleRange( lower, upper );
539 }
540
541 return QgsDoubleRange();
542 }
543
544 case Qgis::RasterElevationMode::RepresentsElevationSurface:
545 {
546 if ( band != mBandNumber )
547 return QgsDoubleRange();
548
549 const double z = pixelValue * mZScale + mZOffset;
550 return QgsDoubleRange( z, z );
551 }
552 }
553 BUILTIN_UNREACHABLE
554}
555
556int QgsRasterLayerElevationProperties::bandForElevationRange( QgsRasterLayer *layer, const QgsDoubleRange &range ) const
557{
558 switch ( mMode )
559 {
560 case Qgis::RasterElevationMode::FixedElevationRange:
561 case Qgis::RasterElevationMode::RepresentsElevationSurface:
562 return -1;
563
564 case Qgis::RasterElevationMode::FixedRangePerBand:
565 {
566 // find the top-most band which matches the map range
567 int currentMatchingBand = -1;
568 QgsDoubleRange currentMatchingRange;
569 for ( auto it = mRangePerBand.constBegin(); it != mRangePerBand.constEnd(); ++it )
570 {
571 if ( it.value().overlaps( range ) )
572 {
573 if ( currentMatchingRange.isInfinite()
574 || ( it.value().includeUpper() && it.value().upper() >= currentMatchingRange.upper() )
575 || ( !currentMatchingRange.includeUpper() && it.value().upper() >= currentMatchingRange.upper() ) )
576 {
577 currentMatchingBand = it.key();
578 currentMatchingRange = it.value();
579 }
580 }
581 }
582 return currentMatchingBand;
583 }
584
585 case Qgis::RasterElevationMode::DynamicRangePerBand:
586 {
587 if ( layer )
588 {
589 QgsExpressionContext context;
590 context.appendScopes( QgsExpressionContextUtils::globalProjectLayerScopes( layer ) );
591 QgsExpressionContextScope *bandScope = new QgsExpressionContextScope();
592 context.appendScope( bandScope );
593
594 QgsProperty lowerProperty = mDataDefinedProperties.property( Property::RasterPerBandLowerElevation );
595 QgsProperty upperProperty = mDataDefinedProperties.property( Property::RasterPerBandUpperElevation );
596 lowerProperty.prepare( context );
597 upperProperty.prepare( context );
598
599 int currentMatchingBand = -1;
600 QgsDoubleRange currentMatchingRange;
601
602 for ( int band = 1; band <= layer->bandCount(); ++band )
603 {
604 bandScope->setVariable( u"band"_s, band );
605 bandScope->setVariable( u"band_name"_s, layer->dataProvider()->displayBandName( band ) );
606 bandScope->setVariable( u"band_description"_s, layer->dataProvider()->bandDescription( band ) );
607
608 bool ok = false;
609 const double lower = lowerProperty.valueAsDouble( context, 0, &ok );
610 if ( !ok )
611 continue;
612 const double upper = upperProperty.valueAsDouble( context, 0, &ok );
613 if ( !ok )
614 continue;
615
616 const QgsDoubleRange bandRange = QgsDoubleRange( lower, upper );
617 if ( bandRange.overlaps( range ) )
618 {
619 if ( currentMatchingRange.isInfinite()
620 || ( bandRange.includeUpper() && bandRange.upper() >= currentMatchingRange.upper() )
621 || ( !currentMatchingRange.includeUpper() && bandRange.upper() >= currentMatchingRange.upper() ) )
622 {
623 currentMatchingBand = band;
624 currentMatchingRange = bandRange;
625 }
626 }
627 }
628 return currentMatchingBand;
629 }
630 return -1;
631 }
632 }
633 BUILTIN_UNREACHABLE
634}
635
636QgsLineSymbol *QgsRasterLayerElevationProperties::profileLineSymbol() const
637{
638 return mProfileLineSymbol.get();
639}
640
641void QgsRasterLayerElevationProperties::setProfileLineSymbol( QgsLineSymbol *symbol )
642{
643 mProfileLineSymbol.reset( symbol );
644 emit changed();
645 emit profileRenderingPropertyChanged();
646}
647
648QgsFillSymbol *QgsRasterLayerElevationProperties::profileFillSymbol() const
649{
650 return mProfileFillSymbol.get();
651}
652
653void QgsRasterLayerElevationProperties::setProfileFillSymbol( QgsFillSymbol *symbol )
654{
655 mProfileFillSymbol.reset( symbol );
656 emit changed();
657 emit profileRenderingPropertyChanged();
658}
659
660void QgsRasterLayerElevationProperties::setProfileSymbology( Qgis::ProfileSurfaceSymbology symbology )
661{
662 if ( mSymbology == symbology )
663 return;
664
665 mSymbology = symbology;
666 emit changed();
667 emit profileRenderingPropertyChanged();
668}
669
670double QgsRasterLayerElevationProperties::elevationLimit() const
671{
672 return mElevationLimit;
673}
674
675void QgsRasterLayerElevationProperties::setElevationLimit( double limit )
676{
677 if ( qgsDoubleNear( mElevationLimit, limit ) )
678 return;
679
680 mElevationLimit = limit;
681 emit changed();
682 emit profileRenderingPropertyChanged();
683}
684
685bool QgsRasterLayerElevationProperties::layerLooksLikeDem( QgsRasterLayer *layer )
686{
687 // multiple bands => unlikely to be a DEM
688 if ( layer->bandCount() > 1 )
689 return false;
690
691 // raster attribute table => unlikely to be a DEM
692 if ( layer->attributeTable( 1 ) )
693 return false;
694
695 if ( QgsRasterDataProvider *dataProvider = layer->dataProvider() )
696 {
697 // filter out data types which aren't likely to be DEMs
698 switch ( dataProvider->dataType( 1 ) )
699 {
700 case Qgis::DataType::Byte:
701 case Qgis::DataType::UnknownDataType:
702 case Qgis::DataType::CInt16:
703 case Qgis::DataType::CInt32:
704 case Qgis::DataType::CFloat32:
705 case Qgis::DataType::CFloat64:
706 case Qgis::DataType::ARGB32:
707 case Qgis::DataType::ARGB32_Premultiplied:
708 return false;
709
710 case Qgis::DataType::Int8:
711 case Qgis::DataType::UInt16:
712 case Qgis::DataType::Int16:
713 case Qgis::DataType::UInt32:
714 case Qgis::DataType::Int32:
715 case Qgis::DataType::Float32:
716 case Qgis::DataType::Float64:
717 break;
718 }
719 }
720
721 // Check the layer's name for DEM-ish hints.
722 // See discussion at https://github.com/qgis/QGIS/pull/30245 - this list must NOT be translated,
723 // but adding hardcoded localized variants of the strings is encouraged.
724 static const QStringList sPartialCandidates{ u"dem"_s,
725 u"dtm"_s,
726 u"dsm"_s,
727 u"height"_s,
728 u"elev"_s,
729 u"srtm"_s,
730 u"dted"_s,
731 // French hints
732 u"mne"_s,
733 u"mnt"_s,
734 u"mns"_s,
735 u"rge"_s,
736 u"alti"_s,
737 // German hints
738 u"dhm"_s,
739 u"dgm"_s,
740 u"dom"_s,
741 u"Höhe"_s,
742 u"Hoehe"_s };
743 const QString layerName = layer->name();
744 for ( const QString &candidate : sPartialCandidates )
745 {
746 if ( layerName.contains( candidate, Qt::CaseInsensitive ) )
747 return true;
748 }
749
750 // these candidates must occur with word boundaries (we don't want to find "aster" in "raster"!)
751 static const QStringList sWordCandidates{ u"aster"_s };
752 for ( const QString &candidate : sWordCandidates )
753 {
754 const thread_local QRegularExpression re( u"\\b%1\\b"_s.arg( candidate ) );
755 if ( re.match( layerName, Qt::CaseInsensitive ).hasMatch() )
756 return true;
757 }
758
759 return false;
760}
761
762void QgsRasterLayerElevationProperties::setDefaultProfileLineSymbol( const QColor &color )
763{
764 auto profileLineLayer = std::make_unique< QgsSimpleLineSymbolLayer >( color, 0.6 );
765 mProfileLineSymbol = std::make_unique< QgsLineSymbol>( QgsSymbolLayerList( { profileLineLayer.release() } ) );
766}
767
768void QgsRasterLayerElevationProperties::setDefaultProfileFillSymbol( const QColor &color )
769{
770 auto profileFillLayer = std::make_unique< QgsSimpleFillSymbolLayer >( color );
771 profileFillLayer->setStrokeStyle( Qt::NoPen );
772 mProfileFillSymbol = std::make_unique< QgsFillSymbol>( QgsSymbolLayerList( { profileFillLayer.release() } ) );
773}
774
775QMap<int, QgsDoubleRange> QgsRasterLayerElevationProperties::fixedRangePerBand() const
776{
777 return mRangePerBand;
778}
779
780void QgsRasterLayerElevationProperties::setFixedRangePerBand( const QMap<int, QgsDoubleRange> &ranges )
781{
782 if ( ranges == mRangePerBand )
783 return;
784
785 mRangePerBand = ranges;
786 emit changed();
787}
788
789QgsDoubleRange QgsRasterLayerElevationProperties::fixedRange() const
790{
791 return mFixedRange;
792}
793
794void QgsRasterLayerElevationProperties::setFixedRange( const QgsDoubleRange &range )
795{
796 if ( range == mFixedRange )
797 return;
798
799 mFixedRange = range;
800 emit changed();
801}
Qgis::RasterElevationMode
RasterElevationMode
Raster layer elevation modes.
Definition qgis.h:4080
Qgis::RasterElevationMode::FixedRangePerBand
@ FixedRangePerBand
Layer has a fixed (manually specified) elevation range per band.
Definition qgis.h:4083
Qgis::RasterElevationMode::FixedElevationRange
@ FixedElevationRange
Layer has a fixed elevation range.
Definition qgis.h:4081
Qgis::RasterElevationMode::RepresentsElevationSurface
@ RepresentsElevationSurface
Pixel values represent an elevation surface.
Definition qgis.h:4082
Qgis::RasterElevationMode::DynamicRangePerBand
@ DynamicRangePerBand
Layer has a elevation range per band, calculated dynamically from an expression.
Definition qgis.h:4084
Qgis::DataType::CInt32
@ CInt32
Complex Int32.
Definition qgis.h:390
Qgis::DataType::Float32
@ Float32
Thirty two bit floating point (float).
Definition qgis.h:387
Qgis::DataType::CFloat64
@ CFloat64
Complex Float64.
Definition qgis.h:392
Qgis::DataType::Int16
@ Int16
Sixteen bit signed integer (qint16).
Definition qgis.h:384
Qgis::DataType::ARGB32_Premultiplied
@ ARGB32_Premultiplied
Color, alpha, red, green, blue, 4 bytes the same as QImage::Format_ARGB32_Premultiplied.
Definition qgis.h:394
Qgis::DataType::Int8
@ Int8
Eight bit signed integer (qint8) (added in QGIS 3.30).
Definition qgis.h:382
Qgis::DataType::UInt16
@ UInt16
Sixteen bit unsigned integer (quint16).
Definition qgis.h:383
Qgis::DataType::Byte
@ Byte
Eight bit unsigned integer (quint8).
Definition qgis.h:381
Qgis::DataType::UnknownDataType
@ UnknownDataType
Unknown or unspecified type.
Definition qgis.h:380
Qgis::DataType::ARGB32
@ ARGB32
Color, alpha, red, green, blue, 4 bytes the same as QImage::Format_ARGB32.
Definition qgis.h:393
Qgis::DataType::Int32
@ Int32
Thirty two bit signed integer (qint32).
Definition qgis.h:386
Qgis::DataType::Float64
@ Float64
Sixty four bit floating point (double).
Definition qgis.h:388
Qgis::DataType::CFloat32
@ CFloat32
Complex Float32.
Definition qgis.h:391
Qgis::DataType::CInt16
@ CInt16
Complex Int16.
Definition qgis.h:389
Qgis::DataType::UInt32
@ UInt32
Thirty two bit unsigned integer (quint32).
Definition qgis.h:385
Qgis::ProfileSurfaceSymbology
ProfileSurfaceSymbology
Surface symbology type for elevation profile plots.
Definition qgis.h:4252
Qgis::ProfileSurfaceSymbology::Line
@ Line
The elevation surface will be rendered using a line symbol.
Definition qgis.h:4253
QgsApplication::colorSchemeRegistry
static QgsColorSchemeRegistry * colorSchemeRegistry()
Returns the application's color scheme registry, used for managing color schemes.
Definition qgsapplication.cpp:2495
QgsColorSchemeRegistry::fetchRandomStyleColor
QColor fetchRandomStyleColor() const
Returns a random color for use with a new symbol style (e.g.
Definition qgscolorschemeregistry.cpp:147
QgsDoubleRange
QgsRange which stores a range of double values.
Definition qgsrange.h:236
QgsDoubleRange::isInfinite
bool isInfinite() const
Returns true if the range consists of all possible values.
Definition qgsrange.h:290
QgsExpressionContextScope
Single scope for storing variables and functions for use within a QgsExpressionContext.
Definition qgsexpressioncontext.h:116
QgsExpressionContextScope::addVariable
void addVariable(const QgsExpressionContextScope::StaticVariable &variable)
Adds a variable into the context scope.
Definition qgsexpressioncontext.cpp:143
QgsExpressionContextScope::setVariable
void setVariable(const QString &name, const QVariant &value, bool isStatic=false)
Convenience method for setting a variable in the context scope by name name and value.
Definition qgsexpressioncontext.cpp:129
QgsExpressionContextUtils::globalProjectLayerScopes
static QList< QgsExpressionContextScope * > globalProjectLayerScopes(const QgsMapLayer *layer)
Creates a list of three scopes: global, layer's project and layer.
Definition qgsexpressioncontextutils.cpp:417
QgsExpressionContext
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
Definition qgsexpressioncontext.h:474
QgsExpressionContext::appendScope
void appendScope(QgsExpressionContextScope *scope)
Appends a scope to the end of the context.
Definition qgsexpressioncontext.cpp:654
QgsExpressionContext::appendScopes
void appendScopes(const QList< QgsExpressionContextScope * > &scopes)
Appends a list of scopes to the end of the context.
Definition qgsexpressioncontext.cpp:659
QgsFillSymbol
A fill symbol type, for rendering Polygon and MultiPolygon geometries.
Definition qgsfillsymbol.h:30
QgsLineSymbol
A line symbol type, for rendering LineString and MultiLineString geometries.
Definition qgslinesymbol.h:30
QgsMapLayerElevationProperties::mDataDefinedProperties
QgsPropertyCollection mDataDefinedProperties
Property collection for data defined elevation settings.
Definition qgsmaplayerelevationproperties.h:324
QgsMapLayerElevationProperties::writeCommonProperties
void writeCommonProperties(QDomElement &element, QDomDocument &doc, const QgsReadWriteContext &context)
Writes common class properties to a DOM element, to be used later with readXml().
Definition qgsmaplayerelevationproperties.cpp:50
QgsMapLayerElevationProperties::profileGenerationPropertyChanged
void profileGenerationPropertyChanged()
Emitted when any of the elevation properties which relate solely to generation of elevation profiles ...
QgsMapLayerElevationProperties::QgsMapLayerElevationProperties
QgsMapLayerElevationProperties(QObject *parent)
Constructor for QgsMapLayerElevationProperties, with the specified parent object.
Definition qgsmaplayerelevationproperties.cpp:30
QgsMapLayerElevationProperties::readCommonProperties
void readCommonProperties(const QDomElement &element, const QgsReadWriteContext &context)
Reads common class properties from a DOM element previously written by writeXml().
Definition qgsmaplayerelevationproperties.cpp:60
QgsMapLayerElevationProperties::changed
void changed()
Emitted when any of the elevation properties have changed.
QgsMapLayerElevationProperties::profileRenderingPropertyChanged
void profileRenderingPropertyChanged()
Emitted when any of the elevation properties which relate solely to presentation of elevation results...
QgsMapLayerElevationProperties::Property::RasterPerBandUpperElevation
@ RasterPerBandUpperElevation
Upper elevation for each raster band.
Definition qgsmaplayerelevationproperties.h:95
QgsMapLayerElevationProperties::Property::RasterPerBandLowerElevation
@ RasterPerBandLowerElevation
Lower elevation for each raster band.
Definition qgsmaplayerelevationproperties.h:94
QgsMapLayerElevationProperties::FlagDontInvalidateCachedRendersWhenRangeChanges
@ FlagDontInvalidateCachedRendersWhenRangeChanges
Any cached rendering will not be invalidated when z range context is modified.
Definition qgsmaplayerelevationproperties.h:104
QgsMapLayer
Base class for all map layer types.
Definition qgsmaplayer.h:83
QgsMapLayer::name
QString name
Definition qgsmaplayer.h:87
QgsProperty
A store for object properties.
Definition qgsproperty.h:230
QgsProperty::valueAsDouble
double valueAsDouble(const QgsExpressionContext &context, double defaultValue=0.0, bool *ok=nullptr) const
Calculates the current value of the property and interprets it as a double.
Definition qgsproperty.cpp:693
QgsProperty::prepare
bool prepare(const QgsExpressionContext &context=QgsExpressionContext()) const
Prepares the property against a specified expression context.
Definition qgsproperty.cpp:425
QgsRange::includeUpper
bool includeUpper() const
Returns true if the upper bound is inclusive, or false if the upper bound is exclusive.
Definition qgsrange.h:104
QgsRange::overlaps
bool overlaps(const QgsRange< T > &other) const
Returns true if this range overlaps another range.
Definition qgsrange.h:179
QgsRange::upper
T upper() const
Returns the upper bound of the range.
Definition qgsrange.h:88
QgsRasterDataProvider
Base class for raster data providers.
Definition qgsrasterdataprovider.h:92
QgsRasterDataProvider::bandDescription
virtual QString bandDescription(int bandNumber)
Returns the description for band bandNumber, or an empty string if the band is not valid or has not d...
Definition qgsrasterdataprovider.cpp:781
QgsRasterInterface::displayBandName
QString displayBandName(int bandNumber) const
Generates a friendly, descriptive name for the specified bandNumber.
Definition qgsrasterinterface.cpp:647
QgsRasterLayerElevationProperties::fixedRange
QgsDoubleRange fixedRange() const
Returns the fixed elevation range for the raster.
Definition qgsrasterlayerelevationproperties.cpp:789
QgsRasterLayerElevationProperties::setProfileFillSymbol
void setProfileFillSymbol(QgsFillSymbol *symbol)
Sets the fill symbol used to render the raster profile in elevation profile plots.
Definition qgsrasterlayerelevationproperties.cpp:653
QgsRasterLayerElevationProperties::setFixedRange
void setFixedRange(const QgsDoubleRange &range)
Sets the fixed elevation range for the raster.
Definition qgsrasterlayerelevationproperties.cpp:794
QgsRasterLayerElevationProperties::elevationRangeForPixelValue
QgsDoubleRange elevationRangeForPixelValue(QgsRasterLayer *layer, int band, double pixelValue) const
Returns the elevation range corresponding to a raw pixel value from the specified band.
Definition qgsrasterlayerelevationproperties.cpp:495
QgsRasterLayerElevationProperties::significantZValues
QList< double > significantZValues(QgsMapLayer *layer) const override
Returns a list of significant elevation/z-values for the specified layer, using the settings defined ...
Definition qgsrasterlayerelevationproperties.cpp:366
QgsRasterLayerElevationProperties::mode
Qgis::RasterElevationMode mode() const
Returns the elevation mode.
Definition qgsrasterlayerelevationproperties.cpp:471
QgsRasterLayerElevationProperties::profileLineSymbol
QgsLineSymbol * profileLineSymbol() const
Returns the line symbol used to render the raster profile in elevation profile plots.
Definition qgsrasterlayerelevationproperties.cpp:636
QgsRasterLayerElevationProperties::hasElevation
bool hasElevation() const override
Returns true if the layer has an elevation or z component.
Definition qgsrasterlayerelevationproperties.cpp:46
QgsRasterLayerElevationProperties::clone
QgsRasterLayerElevationProperties * clone() const override
Creates a clone of the properties.
Definition qgsrasterlayerelevationproperties.cpp:174
QgsRasterLayerElevationProperties::calculateZRange
QgsDoubleRange calculateZRange(QgsMapLayer *layer) const override
Attempts to calculate the overall elevation or z range for the specified layer, using the settings de...
Definition qgsrasterlayerelevationproperties.cpp:282
QgsRasterLayerElevationProperties::flags
QgsMapLayerElevationProperties::Flags flags() const override
Returns flags associated to the elevation properties.
Definition qgsrasterlayerelevationproperties.cpp:443
QgsRasterLayerElevationProperties::setBandNumber
void setBandNumber(int band)
Sets the band number from which the elevation should be taken.
Definition qgsrasterlayerelevationproperties.cpp:485
QgsRasterLayerElevationProperties::bandForElevationRange
int bandForElevationRange(QgsRasterLayer *layer, const QgsDoubleRange &range) const
Returns the band corresponding to the specified range.
Definition qgsrasterlayerelevationproperties.cpp:556
QgsRasterLayerElevationProperties::htmlSummary
QString htmlSummary() const override
Returns a HTML formatted summary of the properties.
Definition qgsrasterlayerelevationproperties.cpp:190
QgsRasterLayerElevationProperties::setElevationLimit
void setElevationLimit(double limit)
Sets the elevation limit, which is used when profileSymbology() is Qgis::ProfileSurfaceSymbology::Fil...
Definition qgsrasterlayerelevationproperties.cpp:675
QgsRasterLayerElevationProperties::setFixedRangePerBand
void setFixedRangePerBand(const QMap< int, QgsDoubleRange > &ranges)
Sets the fixed elevation range for each band.
Definition qgsrasterlayerelevationproperties.cpp:780
QgsRasterLayerElevationProperties::isVisibleInZRange
bool isVisibleInZRange(const QgsDoubleRange &range, QgsMapLayer *layer=nullptr) const override
Returns true if the layer should be visible and rendered for the specified z range.
Definition qgsrasterlayerelevationproperties.cpp:221
QgsRasterLayerElevationProperties::setProfileSymbology
void setProfileSymbology(Qgis::ProfileSurfaceSymbology symbology)
Sets the symbology option used to render the raster profile in elevation profile plots.
Definition qgsrasterlayerelevationproperties.cpp:660
QgsRasterLayerElevationProperties::fixedRangePerBand
QMap< int, QgsDoubleRange > fixedRangePerBand() const
Returns the fixed elevation range for each band.
Definition qgsrasterlayerelevationproperties.cpp:775
QgsRasterLayerElevationProperties::layerLooksLikeDem
static bool layerLooksLikeDem(QgsRasterLayer *layer)
Returns true if a raster layer looks like a DEM.
Definition qgsrasterlayerelevationproperties.cpp:685
QgsRasterLayerElevationProperties::writeXml
QDomElement writeXml(QDomElement &element, QDomDocument &doc, const QgsReadWriteContext &context) override
Writes the properties to a DOM element, to be used later with readXml().
Definition qgsrasterlayerelevationproperties.cpp:51
QgsRasterLayerElevationProperties::profileFillSymbol
QgsFillSymbol * profileFillSymbol() const
Returns the fill symbol used to render the raster profile in elevation profile plots.
Definition qgsrasterlayerelevationproperties.cpp:648
QgsRasterLayerElevationProperties::elevationLimit
double elevationLimit() const
Returns the elevation limit, which is used when profileSymbology() is Qgis::ProfileSurfaceSymbology::...
Definition qgsrasterlayerelevationproperties.cpp:670
QgsRasterLayerElevationProperties::setProfileLineSymbol
void setProfileLineSymbol(QgsLineSymbol *symbol)
Sets the line symbol used to render the raster profile in elevation profile plots.
Definition qgsrasterlayerelevationproperties.cpp:641
QgsRasterLayerElevationProperties::setMode
void setMode(Qgis::RasterElevationMode mode)
Sets the elevation mode.
Definition qgsrasterlayerelevationproperties.cpp:476
QgsRasterLayerElevationProperties::setEnabled
void setEnabled(bool enabled)
Sets whether the elevation properties are enabled, i.e.
Definition qgsrasterlayerelevationproperties.cpp:461
QgsRasterLayerElevationProperties::QgsRasterLayerElevationProperties
QgsRasterLayerElevationProperties(QObject *parent)
Constructor for QgsRasterLayerElevationProperties, with the specified parent object.
Definition qgsrasterlayerelevationproperties.cpp:36
QgsRasterLayerElevationProperties::readXml
bool readXml(const QDomElement &element, const QgsReadWriteContext &context) override
Reads the elevation properties from a DOM element previously written by writeXml().
Definition qgsrasterlayerelevationproperties.cpp:108
QgsRasterLayerElevationProperties::showByDefaultInElevationProfilePlots
bool showByDefaultInElevationProfilePlots() const override
Returns true if the layer should be visible by default in newly created elevation profile plots.
Definition qgsrasterlayerelevationproperties.cpp:438
QgsRasterLayer
Represents a raster layer.
Definition qgsrasterlayer.h:81
QgsRasterLayer::attributeTable
QgsRasterAttributeTable * attributeTable(int bandNumber) const
Returns the (possibly NULL) raster attribute table for the given band bandNumber.
Definition qgsrasterlayer.cpp:288
QgsRasterLayer::bandCount
int bandCount() const
Returns the number of bands in this layer.
Definition qgsrasterlayer.cpp:272
QgsRasterLayer::dataProvider
QgsRasterDataProvider * dataProvider() override
Returns the source data provider.
Definition qgsrasterlayer.cpp:329
QgsReadWriteContext
A container for the context for various read/write operations on objects.
Definition qgsreadwritecontext.h:38
QgsSymbolLayerUtils::loadSymbol
static std::unique_ptr< QgsSymbol > loadSymbol(const QDomElement &element, const QgsReadWriteContext &context)
Attempts to load a symbol from a DOM element.
Definition qgssymbollayerutils.cpp:1284
QgsSymbolLayerUtils::saveSymbol
static QDomElement saveSymbol(const QString &symbolName, const QgsSymbol *symbol, QDomDocument &doc, const QgsReadWriteContext &context)
Writes a symbol definition to XML.
Definition qgssymbollayerutils.cpp:1490
qgsEnumKeyToValue
T qgsEnumKeyToValue(const QString &key, const T &defaultValue, bool tryValueAsKey=true, bool *returnOk=nullptr)
Returns the value corresponding to the given key of an enum.
Definition qgis.h:7110
qgsDoubleToString
QString qgsDoubleToString(double a, int precision=17)
Returns a string representation of a double.
Definition qgis.h:6817
qgsEnumValueToKey
QString qgsEnumValueToKey(const T &value, bool *returnOk=nullptr)
Returns the value for the given key of an enum.
Definition qgis.h:7091
BUILTIN_UNREACHABLE
#define BUILTIN_UNREACHABLE
Definition qgis.h:7489
qgsDoubleNear
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference).
Definition qgis.h:6900
QgsSymbolLayerList
QList< QgsSymbolLayer * > QgsSymbolLayerList
Definition qgssymbol.h:30
QgsExpressionContextScope::StaticVariable
Single variable definition for use within a QgsExpressionContextScope.
Definition qgsexpressioncontext.h:123
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