53 , mLayerName( layer->name() )
54 , mFields( layer->fields() )
56 , mNoSetLayerExpressionContext( layer->customProperty( QStringLiteral(
"_noset_layer_expression_context" ) ).toBool() )
57 , mEnableProfile( context.flags() &
Qgis::RenderContextFlag::RecordProfile )
61 std::unique_ptr< QgsFeatureRenderer > mainRenderer( layer->
renderer() ? layer->
renderer()->
clone() : nullptr );
64 switch ( selectionProperties->selectionRenderingMode() )
72 const QColor layerSelectionColor = selectionProperties->selectionColor();
73 if ( layerSelectionColor.isValid() )
80 if (
QgsSymbol *selectionSymbol = qobject_cast< QgsVectorLayerSelectionProperties * >( layer->
selectionProperties() )->selectionSymbol() )
81 mSelectionSymbol.reset( selectionSymbol->clone() );
92 return g1->level() < g2->level();
95 bool insertedMainRenderer =
false;
96 double prevLevel = std::numeric_limits< double >::lowest();
98 mRenderer = mainRenderer.get();
101 if ( generator->level() >= 0 && prevLevel < 0 && !insertedMainRenderer )
104 mRenderers.emplace_back( std::move( mainRenderer ) );
105 insertedMainRenderer =
true;
107 mRenderers.emplace_back( generator->createRenderer() );
108 prevLevel = generator->level();
114 mRenderers.emplace_back( std::move( mainRenderer ) );
119 mDrawVertexMarkers =
nullptr != layer->
editBuffer();
129 mTemporalFilter = qobject_cast< const QgsVectorLayerTemporalProperties * >( layer->
temporalProperties() )->createFilterString( temporalContext, context.
temporalRange() );
130 QgsDebugMsgLevel(
"Rendering with Temporal Filter: " + mTemporalFilter, 2 );
150 if ( markerTypeString == QLatin1String(
"Cross" ) )
154 else if ( markerTypeString == QLatin1String(
"SemiTransparentCircle" ) )
168 if ( mDrawVertexMarkers )
173 if ( !mNoSetLayerExpressionContext )
176 for (
const std::unique_ptr< QgsFeatureRenderer > &renderer : mRenderers )
178 mAttrNames.unite( renderer->usedAttributes( context ) );
184 mAttrNames.unite( handler->usedAttributes( layer, context ) );
188 prepareLabeling( layer, mAttrNames );
189 prepareDiagrams( layer, mAttrNames );
193 if ( std::any_of( mRenderers.begin(), mRenderers.end(), [](
const auto & renderer ) { return renderer->forceRasterRender(); } ) )
196 mForceRasterRender =
true;
200 ( ( layer->
blendMode() != QPainter::CompositionMode_SourceOver )
205 mForceRasterRender =
true;
209 mPreparationTime = timer.elapsed();
216 mRenderTimeHint = time;
221 return mFeedback.get();
226 return mForceRasterRender;
237 if ( mRenderers.empty() )
240 mErrors.append( QObject::tr(
"No renderer for drawing." ) );
244 std::unique_ptr< QgsScopedRuntimeProfile > profile;
245 if ( mEnableProfile )
247 profile = std::make_unique< QgsScopedRuntimeProfile >( mLayerName, QStringLiteral(
"rendering" ),
layerId() );
248 if ( mPreparationTime > 0 )
256 mBlockRenderUpdates =
true;
257 mElapsedTimer.start();
261 int rendererIndex = 0;
262 for (
const std::unique_ptr< QgsFeatureRenderer > &renderer : mRenderers )
264 res = renderInternal( renderer.get(), rendererIndex++ ) && res;
271bool QgsVectorLayerRenderer::renderInternal(
QgsFeatureRenderer *renderer,
int rendererIndex )
273 const bool isMainRenderer = renderer == mRenderer;
278 if ( renderer->
type() == QLatin1String(
"nullSymbol" ) )
282 if ( !isMainRenderer ||
283 ( !mDrawVertexMarkers && !mLabelProvider && !mDiagramProvider && mSelectedFeatureIds.isEmpty() ) )
287 std::unique_ptr< QgsScopedRuntimeProfile > preparingProfile;
288 if ( mEnableProfile )
291 if ( mRenderers.size() > 1 )
292 title = QObject::tr(
"Preparing render %1" ).arg( rendererIndex + 1 );
294 title = QObject::tr(
"Preparing render" );
295 preparingProfile = std::make_unique< QgsScopedRuntimeProfile >( title, QStringLiteral(
"rendering" ) );
300 bool usingEffect =
false;
308 if ( context.
useAdvancedEffects() && mFeatureBlendMode != QPainter::CompositionMode_SourceOver )
312 context.
painter()->setCompositionMode( mFeatureBlendMode );
324 QString rendererFilter = renderer->
filter( mFields );
327 if ( !mClippingRegions.empty() )
334 bool needsPainterClipPath =
false;
336 if ( needsPainterClipPath )
337 context.
painter()->setClipPath( path, Qt::IntersectClip );
341 if ( mDiagramProvider )
356 if ( featureFilterProvider )
360 if ( !rendererFilter.isEmpty() && rendererFilter != QLatin1String(
"TRUE" ) )
364 if ( !mTemporalFilter.isEmpty() )
375 if ( mSimplifyGeometry )
377 double map2pixelTol = mSimplifyMethod.
threshold();
378 bool validTransform =
true;
407 double sourceHypothenuse = std::sqrt( minimumSrcPoint.sqrDist( maximumSrcPoint ) );
408 double targetHypothenuse = std::sqrt( minimumDstPoint.sqrDist( maximumDstPoint ) );
410 QgsDebugMsgLevel( QStringLiteral(
"Simplify - SourceHypothenuse=%1" ).arg( sourceHypothenuse ), 4 );
411 QgsDebugMsgLevel( QStringLiteral(
"Simplify - TargetHypothenuse=%1" ).arg( targetHypothenuse ), 4 );
414 map2pixelTol *= ( sourceHypothenuse / targetHypothenuse );
420 validTransform =
false;
424 if ( validTransform )
456 std::unique_ptr< QgsScopedRuntimeProfile > preparingFeatureItProfile;
457 if ( mEnableProfile )
459 preparingFeatureItProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Prepare feature iteration" ), QStringLiteral(
"rendering" ) );
470 preparingFeatureItProfile.reset();
471 preparingProfile.reset();
473 std::unique_ptr< QgsScopedRuntimeProfile > renderingProfile;
474 if ( mEnableProfile )
476 renderingProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Rendering" ), QStringLiteral(
"rendering" ) );
480 drawRendererLevels( renderer, fit );
482 drawRenderer( renderer, fit );
486 mErrors.append( QStringLiteral(
"Data source invalid" ) );
503 quint64 totalLabelTime = 0;
505 const bool isMainRenderer = renderer == mRenderer;
511 std::unique_ptr< QgsGeometryEngine > clipEngine;
512 if ( mApplyClipFilter )
515 clipEngine->prepareGeometry();
518 if ( mSelectionSymbol && isMainRenderer )
519 mSelectionSymbol->startRender( context, mFields );
538 if ( mApplyClipGeometries )
541 if ( ! mNoSetLayerExpressionContext )
544 const bool featureIsSelected = isMainRenderer && context.
showSelection() && mSelectedFeatureIds.contains( fet.
id() );
545 bool drawMarker = isMainRenderer && ( mDrawVertexMarkers && context.
drawEditingInformation() && ( !mVertexMarkerOnlyForSelection || featureIsSelected ) );
548 bool rendered =
false;
551 if ( featureIsSelected && mSelectionSymbol )
555 mSelectionSymbol->renderFeature( fet, context, -1,
false, drawMarker );
560 rendered = renderer->
renderFeature( fet, context, -1, featureIsSelected, drawMarker );
580 if ( isMainRenderer && context.
labelingEngine() && ( mLabelProvider || mDiagramProvider ) )
582 const quint64 startLabelTime = timer.elapsed();
591 if ( !symbols.isEmpty() )
593 symbol = symbols.at( 0 );
597 if ( mApplyLabelClipGeometries )
600 if ( mLabelProvider )
602 mLabelProvider->
registerFeature( fet, context, obstacleGeometry, symbol );
604 if ( mDiagramProvider )
609 if ( mApplyLabelClipGeometries )
612 totalLabelTime += ( timer.elapsed() - startLabelTime );
619 QgsDebugError( QStringLiteral(
"Failed to transform a point while drawing a feature with ID '%1'. Ignoring this feature. %2" )
620 .arg( fet.
id() ).arg( cse.
what() ) );
626 std::unique_ptr< QgsScopedRuntimeProfile > cleanupProfile;
627 if ( mEnableProfile )
629 QgsApplication::profiler()->
record( QObject::tr(
"Rendering features" ), ( timer.elapsed() - totalLabelTime ) / 1000.0, QStringLiteral(
"rendering" ) );
630 if ( totalLabelTime > 0 )
634 cleanupProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Finalizing" ), QStringLiteral(
"rendering" ) );
637 if ( mSelectionSymbol && isMainRenderer )
638 mSelectionSymbol->stopRender( context );
640 stopRenderer( renderer,
nullptr );
645 const bool isMainRenderer = renderer == mRenderer;
658 QList<QHash< QgsSymbol *, QList<QgsFeature> >> features;
661 features.push_back( {} );
663 QSet<int> orderByAttributeIdx;
672 if ( !mSelectedFeatureIds.isEmpty() )
681 std::unique_ptr< QgsExpressionContextScopePopper > scopePopper = std::make_unique< QgsExpressionContextScopePopper >( context.
expressionContext(), symbolScope );
684 std::unique_ptr< QgsGeometryEngine > clipEngine;
685 if ( mApplyClipFilter )
688 clipEngine->prepareGeometry();
691 if ( mApplyLabelClipGeometries )
694 std::unique_ptr< QgsScopedRuntimeProfile > fetchFeaturesProfile;
695 if ( mEnableProfile )
697 fetchFeaturesProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Fetching features" ), QStringLiteral(
"rendering" ) );
702 quint64 totalLabelTime = 0;
706 QVector<QVariant> prevValues;
711 qDebug(
"rendering stop!" );
712 stopRenderer( renderer, selRenderer );
722 if ( ! mNoSetLayerExpressionContext )
732 QVector<QVariant> currentValues;
733 for (
const int idx : std::as_const( orderByAttributeIdx ) )
735 currentValues.push_back( fet.
attribute( idx ) );
737 if ( prevValues.empty() )
739 prevValues = std::move( currentValues );
741 else if ( currentValues != prevValues )
745 prevValues = std::move( currentValues );
746 features.push_back( {} );
752 QHash<QgsSymbol *, QList<QgsFeature> > &featuresBack = features.back();
753 auto featuresBackIt = featuresBack.find( sym );
754 if ( featuresBackIt == featuresBack.end() )
756 featuresBackIt = featuresBack.insert( sym, QList<QgsFeature>() );
758 featuresBackIt->append( fet );
762 if ( isMainRenderer && context.
labelingEngine() && ( mLabelProvider || mDiagramProvider ) )
764 const quint64 startLabelTime = timer.elapsed();
774 if ( !symbols.isEmpty() )
776 symbol = symbols.at( 0 );
780 if ( mLabelProvider )
782 mLabelProvider->
registerFeature( fet, context, obstacleGeometry, symbol );
784 if ( mDiagramProvider )
789 totalLabelTime += ( timer.elapsed() - startLabelTime );
793 fetchFeaturesProfile.reset();
794 if ( mEnableProfile )
796 if ( totalLabelTime > 0 )
802 if ( mApplyLabelClipGeometries )
807 if ( features.back().empty() )
810 stopRenderer( renderer, selRenderer );
815 std::unique_ptr< QgsScopedRuntimeProfile > sortingProfile;
816 if ( mEnableProfile )
818 sortingProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Sorting features" ), QStringLiteral(
"rendering" ) );
823 for (
int i = 0; i < symbols.count(); i++ )
829 if ( level < 0 || level >= 1000 )
832 while ( level >= levels.count() )
834 levels[level].append( item );
837 sortingProfile.reset();
839 if ( mApplyClipGeometries )
843 for (
const QHash<
QgsSymbol *, QList<QgsFeature> > &featureLists : features )
845 for (
int l = 0; l < levels.count(); l++ )
848 std::unique_ptr< QgsScopedRuntimeProfile > renderingProfile;
849 if ( mEnableProfile )
851 renderingProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Rendering symbol level %1" ).arg( l + 1 ), QStringLiteral(
"rendering" ) );
854 for (
int i = 0; i < level.count(); i++ )
857 if ( !featureLists.contains( item.
symbol() ) )
859 QgsDebugError( QStringLiteral(
"level item's symbol not found!" ) );
862 const int layer = item.
layer();
863 const QList<QgsFeature> &lst = featureLists[item.
symbol()];
868 stopRenderer( renderer, selRenderer );
872 const bool featureIsSelected = isMainRenderer && context.
showSelection() && mSelectedFeatureIds.contains( feature.id() );
873 if ( featureIsSelected && mSelectionSymbol )
877 const bool drawMarker = isMainRenderer && ( mDrawVertexMarkers && context.
drawEditingInformation() && ( !mVertexMarkerOnlyForSelection || featureIsSelected ) );
879 if ( ! mNoSetLayerExpressionContext )
884 renderer->
renderFeature( feature, context, layer, featureIsSelected, drawMarker );
897 QgsDebugError( QStringLiteral(
"Failed to transform a point while drawing a feature with ID '%1'. Ignoring this feature. %2" )
898 .arg( fet.
id() ).arg( cse.
what() ) );
905 if ( mSelectionSymbol && !mSelectedFeatureIds.empty() && isMainRenderer && context.
showSelection() )
907 mSelectionSymbol->startRender( context, mFields );
909 for (
const QHash<
QgsSymbol *, QList<QgsFeature> > &featureLists : features )
911 for (
auto it = featureLists.constBegin(); it != featureLists.constEnd(); ++it )
913 const QList<QgsFeature> &lst = it.value();
921 const bool featureIsSelected = mSelectedFeatureIds.contains( feature.id() );
922 if ( !featureIsSelected )
928 mSelectionSymbol->renderFeature( feature, context, -1,
false, drawMarker );
933 mSelectionSymbol->stopRender( context );
936 std::unique_ptr< QgsScopedRuntimeProfile > cleanupProfile;
937 if ( mEnableProfile )
939 cleanupProfile = std::make_unique< QgsScopedRuntimeProfile >( QObject::tr(
"Finalizing" ), QStringLiteral(
"rendering" ) );
942 stopRenderer( renderer, selRenderer );
956void QgsVectorLayerRenderer::prepareLabeling(
QgsVectorLayer *layer, QSet<QString> &attributeNames )
980 if ( mLabelProvider )
982 engine2->addProvider( mLabelProvider );
983 if ( !mLabelProvider->
prepare( context, attributeNames ) )
985 engine2->removeProvider( mLabelProvider );
986 mLabelProvider =
nullptr;
996 if ( palyr.limitNumLabels && palyr.maxNumLabels > 0 )
999 .setFilterRect( mContext.extent() )
1004 int nFeatsToLabel = 0;
1013 if ( !palyr.mTextFontFound && !mLabelFontNotFoundNotified )
1015 emit labelingFontNotFound(
this, palyr.mTextFontFamily );
1016 mLabelFontNotFoundNotified =
true;
1021void QgsVectorLayerRenderer::prepareDiagrams(
QgsVectorLayer *layer, QSet<QString> &attributeNames )
1030 engine2->addProvider( mDiagramProvider );
1031 if ( !mDiagramProvider->
prepare( context, attributeNames ) )
1033 engine2->removeProvider( mDiagramProvider );
1034 mDiagramProvider =
nullptr;
The Qgis class provides global constants for use throughout the application.
@ Degrees
Degrees, for planar geographic CRS distance measurements.
@ SkipSymbolRendering
Disable symbol rendering while still drawing labels if enabled (since QGIS 3.24)
@ UseAdvancedEffects
Enable layer opacity and blending effects.
@ SemiTransparentCircle
Semi-transparent circle marker.
@ CustomColor
Use default symbol with a custom selection color.
@ CustomSymbol
Use a custom symbol.
@ Default
Use default symbol and selection colors.
virtual QgsPalLayerSettings settings(const QString &providerId=QString()) const =0
Gets associated label settings.
virtual QgsVectorLayerLabelProvider * provider(QgsVectorLayer *layer) const
Factory for label provider implementation.
static QgsRuntimeProfiler * profiler()
Returns the application runtime profiler.
Qgis::DistanceUnit mapUnits
Custom exception class for Coordinate Reference System related exceptions.
Single scope for storing variables and functions for use within a QgsExpressionContext.
static QgsExpressionContextScope * updateSymbolScope(const QgsSymbol *symbol, QgsExpressionContextScope *symbolScope=nullptr)
Updates a symbol scope related to a QgsSymbol to an expression context.
static QgsExpressionContextScope * layerScope(const QgsMapLayer *layer)
Creates a new scope which contains variables and functions relating to a QgsMapLayer.
QgsExpressionContextScope * popScope()
Removes the last scope from the expression context and return it.
void appendScope(QgsExpressionContextScope *scope)
Appends a scope to the end of the context.
void setFeedback(QgsFeedback *feedback)
Attach a feedback object that can be queried regularly by the expression engine to check if expressio...
void setFeature(const QgsFeature &feature)
Convenience function for setting a feature for the context.
Abstract interface for use by classes that filter the features or attributes of a layer.
virtual void filterFeatures(const QgsVectorLayer *layer, QgsFeatureRequest &featureRequest) const =0
Add additional filters to the feature request to further restrict the features returned by the reques...
Wrapper for iterator of features from vector data provider or vector layer.
bool nextFeature(QgsFeature &f)
void setInterruptionChecker(QgsFeedback *interruptionChecker)
Attach an object that can be queried regularly by the iterator to check if it must stopped.
bool isValid() const
Will return if this iterator is valid.
An interface for objects which generate feature renderers for vector layers.
virtual bool canSkipRender()
Returns true if the renderer can be entirely skipped, i.e.
virtual void modifyRequestExtent(QgsRectangle &extent, QgsRenderContext &context)
Allows for a renderer to modify the extent of a feature request prior to rendering.
virtual QString filter(const QgsFields &fields=QgsFields())
If a renderer does not require all the features this method may be overridden and return an expressio...
QgsPaintEffect * paintEffect() const
Returns the current paint effect for the renderer.
virtual QgsSymbolList symbols(QgsRenderContext &context) const
Returns list of symbols used by the renderer.
virtual void stopRender(QgsRenderContext &context)
Must be called when a render cycle has finished, to allow the renderer to clean up.
virtual bool usesEmbeddedSymbols() const
Returns true if the renderer uses embedded symbols for features.
virtual bool renderFeature(const QgsFeature &feature, QgsRenderContext &context, int layer=-1, bool selected=false, bool drawVertexMarker=false)
Render a feature using this renderer in the given context.
double referenceScale() const
Returns the symbology reference scale.
bool usingSymbolLevels() const
virtual QString dump() const
Returns debug information about this renderer.
virtual QgsFeatureRenderer::Capabilities capabilities()
Returns details about internals of this renderer.
virtual QgsSymbol * symbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const =0
To be overridden.
@ SymbolLevels
Rendering with symbol levels (i.e. implements symbols(), symbolForFeature())
bool orderByEnabled() const
Returns whether custom ordering will be applied before features are processed by this renderer.
virtual bool willRenderFeature(const QgsFeature &feature, QgsRenderContext &context) const
Returns whether the renderer will render a feature or not.
virtual void startRender(QgsRenderContext &context, const QgsFields &fields)
Must be called when a new render cycle is started.
void setVertexMarkerAppearance(Qgis::VertexMarkerType type, double size)
Sets type and size of editing vertex markers for subsequent rendering.
QgsFeatureRequest::OrderBy orderBy() const
Gets the order in which features shall be processed by this renderer.
virtual QgsSymbolList originalSymbolsForFeature(const QgsFeature &feature, QgsRenderContext &context) const
Equivalent of originalSymbolsForFeature() call extended to support renderers that may use more symbol...
virtual QgsFeatureRenderer * clone() const =0
Create a deep copy of this renderer.
QSet< int > CORE_EXPORT usedAttributeIndices(const QgsFields &fields) const
Returns a set of used, validated attribute indices.
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & setSimplifyMethod(const QgsSimplifyMethod &simplifyMethod)
Set a simplification method for geometries that will be fetched.
QgsFeatureRequest & combineFilterExpression(const QString &expression)
Modifies the existing filter expression to add an additional expression filter.
QgsFeatureRequest & setFlags(QgsFeatureRequest::Flags flags)
Sets flags that affect how features will be fetched.
Flags flags() const
Returns the flags which affect how features are fetched.
QgsFeatureRequest & setSubsetOfAttributes(const QgsAttributeList &attrs)
Set a subset of attributes that will be fetched.
void setFeedback(QgsFeedback *feedback)
Attach a feedback object that can be queried regularly by the iterator to check if it should be cance...
@ EmbeddedSymbols
Retrieve any embedded feature symbology (since QGIS 3.20)
QgsFeatureRequest & setExpressionContext(const QgsExpressionContext &context)
Sets the expression context used to evaluate filter expressions.
QgsFeatureRequest & setNoAttributes()
Set that no attributes will be fetched.
QgsFeatureRequest & setOrderBy(const OrderBy &orderBy)
Set a list of order by clauses.
QgsFeatureRequest & setFilterRect(const QgsRectangle &rectangle)
Sets the rectangle from which features will be taken.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
bool hasGeometry() const
Returns true if the feature has an associated geometry.
QVariant attribute(const QString &name) const
Lookup attribute value by attribute name.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
A geometry is the spatial representation of a feature.
const QgsAbstractGeometry * constGet() const
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.
static QgsGeometryEngine * createGeometryEngine(const QgsAbstractGeometry *geometry)
Creates and returns a new geometry engine representing the specified geometry.
bool isEmpty() const
Returns true if the geometry is empty (eg a linestring with no vertices, or a collection with no geom...
QgsRectangle boundingBox() const
Returns the bounding box of the geometry.
Implements a derived label provider for use with QgsLabelSink.
The QgsLabelingEngine class provides map labeling functionality.
static QPainterPath calculatePainterClipRegion(const QList< QgsMapClippingRegion > ®ions, const QgsRenderContext &context, Qgis::LayerType layerType, bool &shouldClip)
Returns a QPainterPath representing the intersection of clipping regions from context which should be...
static QList< QgsMapClippingRegion > collectClippingRegionsForLayer(const QgsRenderContext &context, const QgsMapLayer *layer)
Collects the list of map clipping regions from a context which apply to a map layer.
static QgsGeometry calculateLabelIntersectionGeometry(const QList< QgsMapClippingRegion > ®ions, const QgsRenderContext &context, bool &shouldClip)
Returns the geometry representing the intersection of clipping regions from context which should be u...
static QgsGeometry calculateFeatureIntersectionGeometry(const QList< QgsMapClippingRegion > ®ions, const QgsRenderContext &context, bool &shouldClip)
Returns the geometry representing the intersection of clipping regions from context which should be u...
static QgsGeometry calculateFeatureRequestGeometry(const QList< QgsMapClippingRegion > ®ions, const QgsRenderContext &context, bool &shouldFilter)
Returns the geometry representing the intersection of clipping regions from context.
Base class for utility classes that encapsulate information necessary for rendering of map layers.
bool mReadyToCompose
The flag must be set to false in renderer's constructor if wants to use the smarter map redraws funct...
static constexpr int MAX_TIME_TO_USE_CACHED_PREVIEW_IMAGE
Maximum time (in ms) to allow display of a previously cached preview image while rendering layers,...
QString layerId() const
Gets access to the ID of the layer rendered by this class.
QgsRenderContext * renderContext()
Returns the render context associated with the renderer.
QPainter::CompositionMode blendMode() const
Returns the current blending mode for a layer.
Perform transforms between map coordinates and device coordinates.
double mapUnitsPerPixel() const
Returns the current map units per pixel.
static void logMessage(const QString &message, const QString &tag=QString(), Qgis::MessageLevel level=Qgis::MessageLevel::Warning, bool notifyUser=true)
Adds a message to the log instance (and creates it if necessary).
virtual void begin(QgsRenderContext &context)
Begins intercepting paint operations to a render context.
virtual void end(QgsRenderContext &context)
Ends interception of paint operations to a render context, and draws the result to the render context...
bool enabled() const
Returns whether the effect is enabled.
Contains settings for how a map layer will be labeled.
A class to represent a 2D point.
A rectangle specified with double values.
QString toString(int precision=16) const
Returns a string representation of form xmin,ymin : xmax,ymax Coordinates will be truncated to the sp...
double xMinimum() const
Returns the x minimum value (left side of rectangle).
double yMinimum() const
Returns the y minimum value (bottom side of rectangle).
double xMaximum() const
Returns the x maximum value (right side of rectangle).
double yMaximum() const
Returns the y maximum value (top side of rectangle).
QgsPointXY center() const
Returns the center point of the rectangle.
bool isEmpty() const
Returns true if the rectangle has no area.
QgsRectangle intersect(const QgsRectangle &rect) const
Returns the intersection with the given rectangle.
bool isFinite() const
Returns true if the rectangle has finite boundaries.
Contains information about the context of a rendering operation.
bool useAdvancedEffects() const
Returns true if advanced effects such as blend modes such be used.
bool hasRenderedFeatureHandlers() const
Returns true if the context has any rendered feature handlers.
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsExpressionContext & expressionContext()
Gets the expression context.
void setVectorSimplifyMethod(const QgsVectorSimplifyMethod &simplifyMethod)
Sets the simplification setting to use when rendering vector layers.
QgsLabelSink * labelSink() const
Returns the associated label sink, or nullptr if not set.
const QgsRectangle & extent() const
When rendering a map layer, calling this method returns the "clipping" extent for the layer (in the l...
bool testFlag(Qgis::RenderContextFlag flag) const
Check whether a particular flag is enabled.
void setFeatureClipGeometry(const QgsGeometry &geometry)
Sets a geometry to use to clip features at render time.
const QgsFeatureFilterProvider * featureFilterProvider() const
Gets the filter feature provider used for additional filtering of rendered features.
QList< QgsRenderedFeatureHandlerInterface * > renderedFeatureHandlers() const
Returns the list of rendered feature handlers to use while rendering map layers.
void setSymbologyReferenceScale(double scale)
Sets the symbology reference scale.
bool showSelection() const
Returns true if vector selections should be shown in the rendered map.
const QgsVectorSimplifyMethod & vectorSimplifyMethod() const
Returns the simplification settings to use when rendering vector layers.
const QgsMapToPixel & mapToPixel() const
Returns the context's map to pixel transform, which transforms between map coordinates and device coo...
QColor selectionColor() const
Returns the color to use when rendering selected features.
bool drawEditingInformation() const
Returns true if edit markers should be drawn during the render operation.
bool renderingStopped() const
Returns true if the rendering operation has been stopped and any ongoing rendering should be canceled...
QgsLabelingEngine * labelingEngine() const
Gets access to new labeling engine (may be nullptr).
QgsCoordinateTransform coordinateTransform() const
Returns the current coordinate transform for the context.
void setSelectionColor(const QColor &color)
Sets the color to use when rendering selected features.
An interface for classes which provider custom handlers for features rendered as part of a map render...
Implements a derived label provider for rule based labels for use with QgsLabelSink.
Rule based labeling for a vector layer.
void record(const QString &name, double time, const QString &group="startup", const QString &id=QString())
Manually adds a profile event with the given name and total time (in seconds).
Scoped object for saving and restoring a QPainter object's state.
T value(const QString &dynamicKeyPart=QString()) const
Returns settings value.
static const QgsSettingsEntryDouble * settingsDigitizingMarkerSizeMm
Settings entry digitizing marker size mm.
static const QgsSettingsEntryBool * settingsDigitizingMarkerOnlyForSelected
Settings entry digitizing marker only for selected.
static const QgsSettingsEntryString * settingsDigitizingMarkerStyle
Settings entry digitizing marker style.
This class contains information about how to simplify geometries fetched from a QgsFeatureIterator.
void setTolerance(double tolerance)
Sets the tolerance of simplification in map units. Represents the maximum distance in map units betwe...
void setThreshold(float threshold)
Sets the simplification threshold in pixels. Represents the maximum distance in pixels between two co...
void setForceLocalOptimization(bool localOptimization)
Sets whether the simplification executes after fetch the geometries from provider,...
void setMethodType(MethodType methodType)
Sets the simplification type.
@ OptimizeForRendering
Simplify using the map2pixel data to optimize the rendering of geometries.
QgsSymbol * symbol() const
Returns the symbol which will be rendered for every feature.
void stopRender(QgsRenderContext &context) override
Must be called when a render cycle has finished, to allow the renderer to clean up.
void startRender(QgsRenderContext &context, const QgsFields &fields) override
Must be called when a new render cycle is started.
int renderingPass() const
Specifies the rendering pass in which this symbol layer should be rendered.
int layer() const
The layer of this symbol level.
QgsSymbol * symbol() const
The symbol of this symbol level.
Abstract base class for all rendered symbols.
QgsSymbolLayer * symbolLayer(int layer)
Returns the symbol layer at the specified index.
void setColor(const QColor &color) const
Sets the color for the symbol.
int symbolLayerCount() const
Returns the total number of symbol layers contained in the symbol.
static QgsSymbol * defaultSymbol(Qgis::GeometryType geomType)
Returns a new default symbol for the specified geometry type.
const QgsDateTimeRange & temporalRange() const
Returns the datetime range for the object.
bool isTemporal() const
Returns true if the object's temporal range is enabled, and the object will be filtered when renderin...
The QgsVectorLayerDiagramProvider class implements support for diagrams within the labeling engine.
virtual bool prepare(const QgsRenderContext &context, QSet< QString > &attributeNames)
Prepare for registration of features.
virtual void registerFeature(QgsFeature &feature, QgsRenderContext &context, const QgsGeometry &obstacleGeometry=QgsGeometry())
Register a feature for labeling as one or more QgsLabelFeature objects stored into mFeatures.
void setClipFeatureGeometry(const QgsGeometry &geometry)
Sets a geometry to use to clip features to when registering them as diagrams.
Partial snapshot of vector layer's state (only the members necessary for access to features)
virtual bool prepare(QgsRenderContext &context, QSet< QString > &attributeNames)
Prepare for registration of features.
static QgsGeometry getPointObstacleGeometry(QgsFeature &fet, QgsRenderContext &context, const QgsSymbolList &symbols)
Returns the geometry for a point feature which should be used as an obstacle for labels.
virtual QList< QgsLabelFeature * > registerFeature(const QgsFeature &feature, QgsRenderContext &context, const QgsGeometry &obstacleGeometry=QgsGeometry(), const QgsSymbol *symbol=nullptr)
Register a feature for labeling as one or more QgsLabelFeature objects stored into mLabels.
bool forceRasterRender() const override
Returns true if the renderer must be rendered to a raster paint device (e.g.
QgsVectorLayerRenderer(QgsVectorLayer *layer, QgsRenderContext &context)
~QgsVectorLayerRenderer() override
void setLayerRenderingTimeHint(int time) override
Sets approximate render time (in ms) for the layer to render.
bool render() override
Do the rendering (based on data stored in the class).
QgsFeedback * feedback() const override
Access to feedback object of the layer renderer (may be nullptr)
Implementation of layer selection properties for vector layers.
Encapsulates the context in which a QgsVectorLayer's temporal capabilities will be applied.
void setLayer(QgsVectorLayer *layer)
Sets the associated layer.
Represents a vector layer which manages a vector based data sets.
bool labelsEnabled() const
Returns whether the layer contains labels which are enabled and should be drawn.
QgsMapLayerTemporalProperties * temporalProperties() override
Returns the layer's temporal properties.
QPainter::CompositionMode featureBlendMode() const
Returns the current blending mode for features.
bool diagramsEnabled() const
Returns whether the layer contains diagrams which are enabled and should be drawn.
Q_INVOKABLE const QgsFeatureIds & selectedFeatureIds() const
Returns a list of the selected features IDs in this layer.
const QgsAbstractVectorLayerLabeling * labeling() const
Access to const labeling configuration.
QgsFeatureRenderer * renderer()
Returns the feature renderer used for rendering the features in the layer in 2D map views.
Q_INVOKABLE QgsVectorLayerEditBuffer * editBuffer()
Buffer with uncommitted editing operations. Only valid after editing has been turned on.
Q_INVOKABLE Qgis::GeometryType geometryType() const
Returns point, line or polygon.
const QgsVectorSimplifyMethod & simplifyMethod() const
Returns the simplification settings for fast rendering of features.
bool simplifyDrawingCanbeApplied(const QgsRenderContext &renderContext, QgsVectorSimplifyMethod::SimplifyHint simplifyHint) const
Returns whether the VectorLayer can apply the specified simplification hint.
QList< const QgsFeatureRendererGenerator * > featureRendererGenerators() const
Returns a list of the feature renderer generators owned by the layer.
QgsMapLayerSelectionProperties * selectionProperties() override
Returns the layer's selection properties.
This class contains information how to simplify geometries fetched from a vector layer.
bool forceLocalOptimization() const
Gets where the simplification executes, after fetch the geometries from provider, or when supported,...
void setSimplifyHints(SimplifyHints simplifyHints)
Sets the simplification hints of the vector layer managed.
SimplifyHints simplifyHints() const
Gets the simplification hints of the vector layer managed.
void setTolerance(double tolerance)
Sets the tolerance of simplification in map units. Represents the maximum distance in map units betwe...
float threshold() const
Gets the simplification threshold of the vector layer managed.
@ GeometrySimplification
The geometries can be simplified using the current map2pixel context state.
@ FullSimplification
All simplification hints can be applied ( Geometry + AA-disabling )
@ NoSimplification
No simplification can be applied.
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
#define QgsDebugMsgLevel(str, level)
#define QgsDebugError(str)
QList< QgsSymbolLevel > QgsSymbolLevelOrder
QList< QgsSymbolLevelItem > QgsSymbolLevel
QList< QgsSymbol * > QgsSymbolList