QgsVectorLayerRenderer Class Reference

Implementation of threaded rendering for vector layers. More...

#include <qgsvectorlayerrenderer.h>

Inheritance diagram for QgsVectorLayerRenderer:

Collaboration diagram for QgsVectorLayerRenderer:

Public Member Functions
	QgsVectorLayerRenderer (QgsVectorLayer *layer, QgsRenderContext &context)
	~QgsVectorLayerRenderer ()
virtual bool	render ()
	Do the rendering (based on data stored in the class) More...
void	setGeometryCachePointer (QgsGeometryCache *cache)
	where to save the cached geometries More...
Public Member Functions inherited from QgsMapLayerRenderer
	QgsMapLayerRenderer (const QString &layerID)
virtual	~QgsMapLayerRenderer ()
QStringList	errors () const
	Return list of errors (problems) that happened during the rendering. More...
QString	layerID () const
	Get access to the ID of the layer rendered by this class. More...

Protected Attributes
QgsRenderContext &	mContext
QgsFields	mFields
QgsFeatureIds	mSelectedFeatureIds
QgsVectorLayerFeatureSource *	mSource
QgsFeatureRendererV2 *	mRendererV2
bool	mCacheFeatures
QgsGeometryCache *	mCache
bool	mDrawVertexMarkers
bool	mVertexMarkerOnlyForSelection
int	mVertexMarkerStyle
int	mVertexMarkerSize
QGis::GeometryType	mGeometryType
QStringList	mAttrNames
bool	mLabeling
bool	mDiagrams
int	mLayerTransparency
QPainter::CompositionMode	mFeatureBlendMode
QgsVectorSimplifyMethod	mSimplifyMethod
bool	mSimplifyGeometry
Protected Attributes inherited from QgsMapLayerRenderer
QStringList	mErrors
QString	mLayerID

Private Member Functions
void	prepareLabeling (QgsVectorLayer *layer, QStringList &attributeNames)
	Registers label and diagram layer. More...
void	prepareDiagrams (QgsVectorLayer *layer, QStringList &attributeNames)
void	drawRendererV2 (QgsFeatureIterator &fit)
	Draw layer with renderer V2. More...
void	drawRendererV2Levels (QgsFeatureIterator &fit)
	Draw layer with renderer V2 using symbol levels. More...
void	stopRendererV2 (QgsSingleSymbolRendererV2 *selRenderer)
	Stop version 2 renderer and selected renderer (if required) More...

Detailed Description

Implementation of threaded rendering for vector layers.

Note

added in 2.4

Definition at line 50 of file qgsvectorlayerrenderer.h.

Constructor & Destructor Documentation

QgsVectorLayerRenderer::QgsVectorLayerRenderer	(	QgsVectorLayer *	layer,
		QgsRenderContext &	context
	)

Definition at line 38 of file qgsvectorlayerrenderer.cpp.

References QgsFeatureRendererV2::clone(), QgsVectorLayer::Cross, QgsFeatureRendererV2::dump(), QgsVectorLayer::editBuffer(), QgsVectorLayer::featureBlendMode(), QgsVectorSimplifyMethod::GeometrySimplification, QgsVectorLayer::geometryType(), QgsVectorLayer::layerTransparency(), mAttrNames, mContext, mDrawVertexMarkers, mFeatureBlendMode, mGeometryType, mLayerTransparency, mRendererV2, mSelectedFeatureIds, mSimplifyGeometry, mSimplifyMethod, mSource, mVertexMarkerOnlyForSelection, mVertexMarkerSize, mVertexMarkerStyle, QgsVectorLayer::NoMarker, prepareDiagrams(), prepareLabeling(), QgsDebugMsg, QgsVectorLayer::rendererV2(), QgsVectorLayer::selectedFeaturesIds(), QgsVectorLayer::SemiTransparentCircle, QgsFeatureRendererV2::setVertexMarkerAppearance(), QgsVectorLayer::simplifyDrawingCanbeApplied(), QgsVectorLayer::simplifyMethod(), and QgsFeatureRendererV2::usedAttributes().

QgsVectorLayerRenderer::~QgsVectorLayerRenderer

(

)

Definition at line 102 of file qgsvectorlayerrenderer.cpp.

References mRendererV2, and mSource.

Member Function Documentation

void QgsVectorLayerRenderer::drawRendererV2 ( QgsFeatureIterator &  fit )

private

Draw layer with renderer V2.

QgsFeatureRenderer::startRender() needs to be called before using this method

Definition at line 232 of file qgsvectorlayerrenderer.cpp.

References QgsGeometryCache::cacheGeometry(), QgsRenderContext::drawEditingInformation(), QgsFeature::geometry(), QgsFeature::id(), QgsRenderContext::labelingEngine(), QgsMapLayerRenderer::layerID(), mCache, mContext, mDiagrams, mDrawVertexMarkers, mLabeling, QgsMapLayerRenderer::mLayerID, mRendererV2, mSelectedFeatureIds, mVertexMarkerOnlyForSelection, QgsFeatureIterator::nextFeature(), QgsDebugMsg, QgsLabelingEngineInterface::registerDiagramFeature(), QgsLabelingEngineInterface::registerFeature(), QgsFeatureRendererV2::renderFeature(), QgsRenderContext::renderingStopped(), QgsRenderContext::showSelection(), stopRendererV2(), and QgsException::what().

Referenced by render().

void QgsVectorLayerRenderer::drawRendererV2Levels ( QgsFeatureIterator &  fit )

private

Draw layer with renderer V2 using symbol levels.

QgsFeatureRenderer::startRender() needs to be called before using this method

Definition at line 285 of file qgsvectorlayerrenderer.cpp.

References QgsGeometryCache::cacheGeometry(), QgsSymbolV2::defaultSymbol(), QgsRenderContext::drawEditingInformation(), QgsFeature::geometry(), QgsFeature::id(), QgsRenderContext::labelingEngine(), QgsSymbolV2LevelItem::layer(), mCache, mContext, mDiagrams, mDrawVertexMarkers, mFields, mGeometryType, mLabeling, QgsMapLayerRenderer::mLayerID, mRendererV2, mSelectedFeatureIds, mVertexMarkerOnlyForSelection, mVertexMarkerSize, mVertexMarkerStyle, QgsFeatureIterator::nextFeature(), QgsDebugMsg, QgsLabelingEngineInterface::registerDiagramFeature(), QgsLabelingEngineInterface::registerFeature(), QgsFeatureRendererV2::renderFeature(), QgsSymbolLayerV2::renderingPass(), QgsRenderContext::renderingStopped(), QgsRenderContext::selectionColor(), QgsSymbolV2::setColor(), QgsFeatureRendererV2::setVertexMarkerAppearance(), QgsSingleSymbolRendererV2::startRender(), stopRendererV2(), QgsSingleSymbolRendererV2::symbol(), QgsSymbolV2LevelItem::symbol(), QgsFeatureRendererV2::symbolForFeature(), QgsSymbolV2::symbolLayer(), QgsSymbolV2::symbolLayerCount(), QgsFeatureRendererV2::symbols(), and QgsException::what().

Referenced by render().

void QgsVectorLayerRenderer::prepareDiagrams ( QgsVectorLayer *  layer, QStringList &  attributeNames  )

private

Definition at line 459 of file qgsvectorlayerrenderer.cpp.

References QgsLabelingEngineInterface::addDiagramLayer(), QgsFields::at(), QgsLinearlyInterpolatedDiagramRenderer::classificationAttribute(), QgsLinearlyInterpolatedDiagramRenderer::classificationAttributeExpression(), QgsLinearlyInterpolatedDiagramRenderer::classificationAttributeIsExpression(), QgsDiagramRendererV2::diagram(), QgsDiagramRendererV2::diagramAttributes(), QgsVectorLayer::diagramLayerSettings(), QgsVectorLayer::diagramRenderer(), QgsRenderContext::labelingEngine(), mContext, mDiagrams, mFields, QgsField::name(), QgsExpression::referencedColumns(), QgsDiagramLayerSettings::xPosColumn, and QgsDiagramLayerSettings::yPosColumn.

Referenced by QgsVectorLayerRenderer().

void QgsVectorLayerRenderer::prepareLabeling ( QgsVectorLayer *  layer, QStringList &  attributeNames  )

private

Registers label and diagram layer.

Parameters

layer	diagram layer
attributeNames	attributes needed for labeling and diagrams will be added to the list

Definition at line 419 of file qgsvectorlayerrenderer.cpp.

References QgsRenderContext::extent(), QgsRenderContext::labelingEngine(), QgsLabelingEngineInterface::layer(), QgsPalLayerSettings::limitNumLabels, QgsPalLayerSettings::maxNumLabels, mContext, QgsPalLayerSettings::mFeaturesToLabel, mLabeling, QgsMapLayerRenderer::mLayerID, QgsPalLayerSettings::mTextFontFamily, QgsPalLayerSettings::mTextFontFound, QgsFeatureIterator::nextFeature(), and QgsLabelingEngineInterface::prepareLayer().

Referenced by QgsVectorLayerRenderer().

bool QgsVectorLayerRenderer::render ( )

virtual

Do the rendering (based on data stored in the class)

Implements QgsMapLayerRenderer.

Definition at line 109 of file qgsvectorlayerrenderer.cpp.

References QgsFeatureRendererV2::capabilities(), QgsRectangle::center(), QgsRenderContext::coordinateTransform(), drawRendererV2(), drawRendererV2Levels(), QgsRenderContext::extent(), QgsVectorSimplifyMethod::forceLocalOptimization(), QgsCoordinateReferenceSystem::geographicFlag(), QgsVectorLayerFeatureSource::getFeatures(), QgsRectangle::isEmpty(), QgsRectangle::isFinite(), QgsMessageLog::logMessage(), QgsRenderContext::mapToPixel(), QgsMapToPixel::mapUnitsPerPixel(), mAttrNames, mContext, QgsMapLayerRenderer::mErrors, mFeatureBlendMode, mFields, mGeometryType, mLayerTransparency, mRendererV2, mSimplifyGeometry, mSimplifyMethod, mSource, QGis::NoGeometry, QgsVectorSimplifyMethod::NoSimplification, QgsSimplifyMethod::OptimizeForRendering, QgsRenderContext::painter(), QgsDebugMsg, QgsFeatureRequest::setFilterRect(), QgsSimplifyMethod::setForceLocalOptimization(), QgsSimplifyMethod::setMethodType(), QgsVectorSimplifyMethod::setSimplifyHints(), QgsFeatureRequest::setSimplifyMethod(), QgsSimplifyMethod::setTolerance(), QgsRenderContext::setVectorSimplifyMethod(), QgsCoordinateTransform::sourceCrs(), QgsFeatureRendererV2::startRender(), QgsFeatureRendererV2::SymbolLevels, QgsVectorSimplifyMethod::threshold(), QgsRectangle::toString(), tr, QgsCoordinateTransform::transform(), QGis::UnknownGeometry, QgsRenderContext::useAdvancedEffects(), QgsFeatureRendererV2::usingSymbolLevels(), QgsException::what(), QgsPoint::x(), QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsPoint::y(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().

Referenced by QgsVectorLayer::draw().

void QgsVectorLayerRenderer::setGeometryCachePointer

(

QgsGeometryCache *

cache

)

where to save the cached geometries

Note

The way how geometries are cached is really suboptimal - this method may be removed in future releases

Definition at line 219 of file qgsvectorlayerrenderer.cpp.

References QgsRenderContext::extent(), mCache, mContext, and QgsGeometryCache::setCachedGeometriesRect().

void QgsVectorLayerRenderer::stopRendererV2 ( QgsSingleSymbolRendererV2 *  selRenderer )

private

Stop version 2 renderer and selected renderer (if required)

Definition at line 406 of file qgsvectorlayerrenderer.cpp.

References mContext, mRendererV2, QgsSingleSymbolRendererV2::stopRender(), and QgsFeatureRendererV2::stopRender().

Referenced by drawRendererV2(), and drawRendererV2Levels().

Member Data Documentation

QStringList QgsVectorLayerRenderer::mAttrNames

protected

Definition at line 104 of file qgsvectorlayerrenderer.h.

Referenced by QgsVectorLayerRenderer(), and render().

QgsGeometryCache* QgsVectorLayerRenderer::mCache

protected

Definition at line 96 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), and setGeometryCachePointer().

bool QgsVectorLayerRenderer::mCacheFeatures

protected

Definition at line 95 of file qgsvectorlayerrenderer.h.

QgsRenderContext& QgsVectorLayerRenderer::mContext

protected

Definition at line 85 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), prepareDiagrams(), prepareLabeling(), QgsVectorLayerRenderer(), render(), setGeometryCachePointer(), and stopRendererV2().

bool QgsVectorLayerRenderer::mDiagrams

protected

Definition at line 107 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), and prepareDiagrams().

bool QgsVectorLayerRenderer::mDrawVertexMarkers

protected

Definition at line 98 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), and QgsVectorLayerRenderer().

QPainter::CompositionMode QgsVectorLayerRenderer::mFeatureBlendMode

protected

Definition at line 110 of file qgsvectorlayerrenderer.h.

Referenced by QgsVectorLayerRenderer(), and render().

QgsFields QgsVectorLayerRenderer::mFields

protected

Definition at line 87 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2Levels(), prepareDiagrams(), and render().

QGis::GeometryType QgsVectorLayerRenderer::mGeometryType

protected

Definition at line 102 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2Levels(), QgsVectorLayerRenderer(), and render().

bool QgsVectorLayerRenderer::mLabeling

protected

Definition at line 106 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), and prepareLabeling().

int QgsVectorLayerRenderer::mLayerTransparency

protected

Definition at line 109 of file qgsvectorlayerrenderer.h.

Referenced by QgsVectorLayerRenderer(), and render().

QgsFeatureRendererV2* QgsVectorLayerRenderer::mRendererV2

protected

Definition at line 93 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), QgsVectorLayerRenderer(), render(), stopRendererV2(), and ~QgsVectorLayerRenderer().

QgsFeatureIds QgsVectorLayerRenderer::mSelectedFeatureIds

protected

Definition at line 89 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), and QgsVectorLayerRenderer().

bool QgsVectorLayerRenderer::mSimplifyGeometry

protected

Definition at line 113 of file qgsvectorlayerrenderer.h.

Referenced by QgsVectorLayerRenderer(), and render().

QgsVectorSimplifyMethod QgsVectorLayerRenderer::mSimplifyMethod

protected

Definition at line 112 of file qgsvectorlayerrenderer.h.

Referenced by QgsVectorLayerRenderer(), and render().

QgsVectorLayerFeatureSource* QgsVectorLayerRenderer::mSource

protected

Definition at line 91 of file qgsvectorlayerrenderer.h.

Referenced by QgsVectorLayerRenderer(), render(), and ~QgsVectorLayerRenderer().

bool QgsVectorLayerRenderer::mVertexMarkerOnlyForSelection

protected

Definition at line 99 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2(), drawRendererV2Levels(), and QgsVectorLayerRenderer().

int QgsVectorLayerRenderer::mVertexMarkerSize

protected

Definition at line 100 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2Levels(), and QgsVectorLayerRenderer().

int QgsVectorLayerRenderer::mVertexMarkerStyle

protected

Definition at line 100 of file qgsvectorlayerrenderer.h.

Referenced by drawRendererV2Levels(), and QgsVectorLayerRenderer().

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The documentation for this class was generated from the following files:

• /tmp/buildd/qgis-2.4.0+unstable1/src/core/qgsvectorlayerrenderer.h
• /tmp/buildd/qgis-2.4.0+unstable1/src/core/qgsvectorlayerrenderer.cpp