QgsInvertedPolygonRenderer is a polygon-only feature renderer used to display features inverted, where the exterior is turned to an interior and where the exterior theoretically spans the entire plane, allowing to mask the surroundings of some features. More...

#include <qgsinvertedpolygonrenderer.h>

Inheritance diagram for QgsInvertedPolygonRenderer:

[legend]

Public Member Functions
	QgsInvertedPolygonRenderer (QgsFeatureRendererV2 *embeddedRenderer=nullptr)
	Constructor. More...

virtual	~QgsInvertedPolygonRenderer ()

virtual int	capabilities () override
	Proxy that will call this method on the embedded renderer. More...

virtual void	checkLegendSymbolItem (const QString &key, bool state=true) override
	item in symbology was checked More...

virtual QgsInvertedPolygonRenderer *	clone () const override
	Used to clone this feature renderer. More...

virtual QString	dump () const override

const QgsFeatureRendererV2 *	embeddedRenderer () const override
	Returns the current embedded renderer (subrenderer) for this feature renderer. More...

virtual bool	legendSymbolItemChecked (const QString &key) override
	items of symbology items in legend is checked More...

virtual QgsLegendSymbolList	legendSymbolItems (double scaleDenominator=-1, const QString &rule="") override
	Proxy that will call this method on the embedded renderer. More...

virtual bool	legendSymbolItemsCheckable () const override
	items of symbology items in legend should be checkable More...

virtual QgsLegendSymbolListV2	legendSymbolItemsV2 () const override
	Return a list of symbology items for the legend. More...

virtual QgsLegendSymbologyList	legendSymbologyItems (QSize iconSize) override
	Proxy that will call this method on the embedded renderer. More...

virtual QgsSymbolV2 *	originalSymbolForFeature (QgsFeature &feat, QgsRenderContext &context) override
	Proxy that will call this method on the embedded renderer. More...

virtual QgsSymbolV2List	originalSymbolsForFeature (QgsFeature &feat, QgsRenderContext &context) override
	Proxy that will call this method on the embedded renderer. More...

bool	preprocessingEnabled () const

virtual bool	renderFeature (QgsFeature &feature, QgsRenderContext &context, int layer=-1, bool selected=false, bool drawVertexMarker=false) override
	Renders a given feature. More...

virtual QDomElement	save (QDomDocument &doc) override
	Creates an XML representation of the renderer. More...

void	setEmbeddedRenderer (QgsFeatureRendererV2 *subRenderer) override
	Sets an embedded renderer (subrenderer) for this feature renderer. More...

virtual void	setLegendSymbolItem (const QString &key, QgsSymbolV2 *symbol) override
	Sets the symbol to be used for a legend symbol item. More...

void	setPreprocessingEnabled (bool enabled)

virtual void	startRender (QgsRenderContext &context, const QgsFields &fields) override
	Needs to be called when a new render cycle is started. More...

virtual void	stopRender (QgsRenderContext &context) override
	The actual rendering will take place here. More...

virtual QgsSymbolV2 *	symbolForFeature (QgsFeature &feature, QgsRenderContext &context) override
	Proxy that will call this method on the embedded renderer. More...

virtual QgsSymbolV2List	symbols (QgsRenderContext &context) override
	Proxy that will call this method on the embedded renderer. More...

virtual QgsSymbolV2List	symbolsForFeature (QgsFeature &feat, QgsRenderContext &context) override
	Proxy that will call this method on the embedded renderer. More...

virtual QList< QString >	usedAttributes () override
	Proxy that will call this method on the embedded renderer. More...

virtual bool	willRenderFeature (QgsFeature &feat, QgsRenderContext &context) override
	Proxy that will call this method on the embedded renderer. More...

Public Member Functions inherited from QgsFeatureRendererV2
virtual	~QgsFeatureRendererV2 ()

virtual QString	filter (const QgsFields &fields=QgsFields())
	If a renderer does not require all the features this method may be overridden and return an expression used as where clause. More...

virtual bool	filterNeedsGeometry () const
	Returns true if this renderer requires the geometry to apply the filter. More...

bool	forceRasterRender () const
	Returns whether the renderer must render as a raster. More...

virtual QString	legendClassificationAttribute () const
	If supported by the renderer, return classification attribute for the use in legend. More...

virtual QSet< QString >	legendKeysForFeature (QgsFeature &feature, QgsRenderContext &context)
	Return legend keys matching a specified feature. More...

virtual void	modifyRequestExtent (QgsRectangle &extent, QgsRenderContext &context)
	Allows for a renderer to modify the extent of a feature request prior to rendering. More...

QgsFeatureRequest::OrderBy	orderBy () const
	Get the order in which features shall be processed by this renderer. More...

bool	orderByEnabled () const
	Returns whether custom ordering will be applied before features are processed by this renderer. More...

virtual Q_DECL_DEPRECATED QgsSymbolV2 *	originalSymbolForFeature (QgsFeature &feature)
	Return symbol for feature. More...

virtual Q_DECL_DEPRECATED QgsSymbolV2List	originalSymbolsForFeature (QgsFeature &feat)
	Equivalent of originalSymbolsForFeature() call extended to support renderers that may use more symbols per feature - similar to symbolsForFeature() More...

QgsPaintEffect *	paintEffect () const
	Returns the current paint effect for the renderer. More...

virtual Q_DECL_DEPRECATED QString	rotationField () const
	return rotation field name (or empty string if not set or not supported by renderer) More...

void	setForceRasterRender (bool forceRaster)
	Sets whether the renderer should be rendered to a raster destination. More...

void	setOrderBy (const QgsFeatureRequest::OrderBy &orderBy)
	Define the order in which features shall be processed by this renderer. More...

void	setOrderByEnabled (bool enabled)
	Sets whether custom ordering should be applied before features are processed by this renderer. More...

void	setPaintEffect (QgsPaintEffect *effect)
	Sets the current paint effect for the renderer. More...

virtual Q_DECL_DEPRECATED void	setRotationField (const QString &fieldName)
	sets rotation field of renderer (if supported by the renderer) More...

void	setUsingSymbolLevels (bool usingSymbolLevels)

void	setVertexMarkerAppearance (int type, int size)
	set type and size of editing vertex markers for subsequent rendering More...

virtual Q_DECL_DEPRECATED void	startRender (QgsRenderContext &context, const QgsVectorLayer *vlayer)

virtual Q_DECL_DEPRECATED QgsSymbolV2 *	symbolForFeature (QgsFeature &feature)
	To be overridden. More...

virtual Q_DECL_DEPRECATED QgsSymbolV2List	symbols ()
	For symbol levels. More...

virtual Q_DECL_DEPRECATED QgsSymbolV2List	symbolsForFeature (QgsFeature &feat)
	Returns list of symbols used for rendering the feature. More...

virtual void	toSld (QDomDocument &doc, QDomElement &element) const
	used from subclasses to create SLD Rule elements following SLD v1.1 specs More...

virtual void	toSld (QDomDocument &doc, QDomElement &element, const QgsStringMap &props) const
	used from subclasses to create SLD Rule elements following SLD v1.1 specs More...

QString	type () const

bool	usingSymbolLevels () const

virtual Q_DECL_DEPRECATED bool	willRenderFeature (QgsFeature &feat)
	Returns whether the renderer will render a feature or not. More...

virtual Q_DECL_DEPRECATED QDomElement	writeSld (QDomDocument &doc, const QgsVectorLayer &layer) const
	create the SLD UserStyle element following the SLD v1.1 specs More...

virtual QDomElement	writeSld (QDomDocument &doc, const QString &styleName) const
	create the SLD UserStyle element following the SLD v1.1 specs with the given name More...

virtual QDomElement	writeSld (QDomDocument &doc, const QString &styleName, const QgsStringMap &props) const
	create the SLD UserStyle element following the SLD v1.1 specs with the given name More...

Static Public Member Functions
static QgsInvertedPolygonRenderer *	convertFromRenderer (const QgsFeatureRendererV2 *renderer)
	Creates a QgsInvertedPolygonRenderer by a conversion from an existing renderer. More...

static QgsFeatureRendererV2 *	create (QDomElement &element)
	Creates a renderer out of an XML, for loading. More...

Static Public Member Functions inherited from QgsFeatureRendererV2
static QgsFeatureRendererV2 *	defaultRenderer (QGis::GeometryType geomType)
	return a new renderer - used by default in vector layers More...

static QgsFeatureRendererV2 *	load (QDomElement &symbologyElem)
	create a renderer from XML element More...

static QgsFeatureRendererV2 *	loadSld (const QDomNode &node, QGis::GeometryType geomType, QString &errorMessage)
	Create a new renderer according to the information contained in the UserStyle element of a SLD style document. More...

Additional Inherited Members
Public Types inherited from QgsFeatureRendererV2
enum	Capabilities { SymbolLevels = 1, RotationField = 1 << 1, MoreSymbolsPerFeature = 1 << 2, Filter = 1 << 3, ScaleDependent = 1 << 4 }

Protected Member Functions inherited from QgsFeatureRendererV2
	QgsFeatureRendererV2 (const QString &type)

Q_DECL_DEPRECATED void	copyPaintEffect (QgsFeatureRendererV2 *destRenderer) const
	Copies paint effect of this renderer to another renderer. More...

void	copyRendererData (QgsFeatureRendererV2 *destRenderer) const
	Clones generic renderer data to another renderer. More...

void	renderFeatureWithSymbol (QgsFeature &feature, QgsSymbolV2 *symbol, QgsRenderContext &context, int layer, bool selected, bool drawVertexMarker)

void	renderVertexMarker (QPointF pt, QgsRenderContext &context)
	render editing vertex marker at specified point More...

void	renderVertexMarkerPolygon (QPolygonF &pts, QList< QPolygonF > *rings, QgsRenderContext &context)
	render editing vertex marker for a polygon More...

void	renderVertexMarkerPolyline (QPolygonF &pts, QgsRenderContext &context)
	render editing vertex marker for a polyline More...

void	setScaleMethodToSymbol (QgsSymbolV2 *symbol, int scaleMethod)

Static Protected Member Functions inherited from QgsFeatureRendererV2
static QgsConstWkbPtr	_getLineString (QPolygonF &pts, QgsRenderContext &context, QgsConstWkbPtr &wkb, bool clipToExtent=true)
	Creates a line string in screen coordinates from a wkb string in map coordinates. More...

static QgsConstWkbPtr	_getPoint (QPointF &pt, QgsRenderContext &context, QgsConstWkbPtr &wkb)
	Creates a point in screen coordinates from a wkb string in map coordinates. More...

static QgsConstWkbPtr	_getPolygon (QPolygonF &pts, QList< QPolygonF > &holes, QgsRenderContext &context, QgsConstWkbPtr &wkb, bool clipToExtent=true)
	Creates a polygon in screen coordinates from a wkb string in map coordinates. More...

static void	convertSymbolRotation (QgsSymbolV2 *symbol, const QString &field)

static void	convertSymbolSizeScale (QgsSymbolV2 *symbol, QgsSymbolV2::ScaleMethod method, const QString &field)

Protected Attributes inherited from QgsFeatureRendererV2
int	mCurrentVertexMarkerSize
	The current size of editing marker. More...

int	mCurrentVertexMarkerType
	The current type of editing marker. More...

bool	mForceRaster

QgsFeatureRequest::OrderBy	mOrderBy

bool	mOrderByEnabled

QgsPaintEffect *	mPaintEffect

QString	mType

bool	mUsingSymbolLevels

Detailed Description

QgsInvertedPolygonRenderer is a polygon-only feature renderer used to display features inverted, where the exterior is turned to an interior and where the exterior theoretically spans the entire plane, allowing to mask the surroundings of some features.

It is designed on top of another feature renderer, which is called "embedded" Most of the methods are then only proxies to the embedded renderer.

Features are collected to form one "inverted" polygon during renderFeature() and rendered on stopRender().

Note: added in 2.4

Definition at line 40 of file qgsinvertedpolygonrenderer.h.

Constructor & Destructor Documentation

◆ QgsInvertedPolygonRenderer()

QgsInvertedPolygonRenderer::QgsInvertedPolygonRenderer ( QgsFeatureRendererV2 * embeddedRenderer = nullptr )

Constructor.

Parameters

embeddedRenderer optional embeddedRenderer. If null, a default one will be assigned. Ownership will be transferred.

Definition at line 32 of file qgsinvertedpolygonrenderer.cpp.

◆ ~QgsInvertedPolygonRenderer()

QgsInvertedPolygonRenderer::~QgsInvertedPolygonRenderer ( )

virtual

Definition at line 46 of file qgsinvertedpolygonrenderer.cpp.

Member Function Documentation

◆ capabilities()

int QgsInvertedPolygonRenderer::capabilities ( )

overridevirtual

Proxy that will call this method on the embedded renderer.

feature	the feature to render
context	the rendering context
layer	the symbol layer to render, if that makes sense
selected	whether this feature has been selected (this will add decorations)
drawVertexMarker	whether this feature has vertex markers (in edit mode usually)

key	rule key for legend symbol
symbol	new symbol for legend item. Ownership is transferred to renderer.

context	Additional information passed to the renderer about the job which will be rendered
fields	The fields available for rendering

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsInvertedPolygonRenderer()

◆ ~QgsInvertedPolygonRenderer()

Member Function Documentation

◆ capabilities()

◆ checkLegendSymbolItem()

◆ clone()

◆ convertFromRenderer()

◆ create()

◆ dump()

◆ embeddedRenderer()

◆ legendSymbolItemChecked()

◆ legendSymbolItems()

◆ legendSymbolItemsCheckable()

◆ legendSymbolItemsV2()

◆ legendSymbologyItems()

◆ originalSymbolForFeature()

◆ originalSymbolsForFeature()

◆ preprocessingEnabled()

◆ renderFeature()

◆ save()

◆ setEmbeddedRenderer()

◆ setLegendSymbolItem()

◆ setPreprocessingEnabled()

◆ startRender()

◆ stopRender()

◆ symbolForFeature()

◆ symbols()

◆ symbolsForFeature()

◆ usedAttributes()

◆ willRenderFeature()