Renders the diagrams for all features with the same settings. More...

#include <qgsdiagramrenderer.h>

Inheritance diagram for QgsSingleCategoryDiagramRenderer:

Public Member Functions
	QgsSingleCategoryDiagramRenderer ()=default

QgsSingleCategoryDiagramRenderer *	clone () const override
	Returns new instance that is equivalent to this one.

QList< QString >	diagramAttributes () const override
	Returns attribute indices needed for diagram rendering.

QList< QgsDiagramSettings >	diagramSettings () const override
	Returns list with all diagram settings in the renderer.

QList< QgsLayerTreeModelLegendNode * >	legendItems (QgsLayerTreeLayer *nodeLayer) const override
	Returns list of legend nodes for the diagram.

void	readXml (const QDomElement &elem, const QgsReadWriteContext &context) override
	Reads diagram state from a DOM element.

QString	rendererName () const override

void	setDiagramSettings (const QgsDiagramSettings &s)

void	writeXml (QDomElement &layerElem, QDomDocument &doc, const QgsReadWriteContext &context) const override
	Writes diagram state to a DOM element.

Public Member Functions inherited from QgsDiagramRenderer
	QgsDiagramRenderer ()=default

virtual	~QgsDiagramRenderer ()=default

bool	attributeLegend () const
	Returns `true` if renderer will show legend items for diagram attributes.

QgsDiagram *	diagram () const

virtual QSet< QString >	referencedFields (const QgsExpressionContext &context=QgsExpressionContext()) const
	Returns the set of any fields required for diagram rendering.

virtual void	renderDiagram (const QgsFeature &feature, QgsRenderContext &c, QPointF pos, const QgsPropertyCollection &properties=QgsPropertyCollection()) const
	Renders the diagram for a specified feature at a specific position in the passed render context.

void	setAttributeLegend (bool enabled)
	Sets whether the renderer will show legend items for diagram attributes.

void	setDiagram (QgsDiagram *d)

virtual QSizeF	sizeMapUnits (const QgsFeature &feature, const QgsRenderContext &c) const
	Returns size of the diagram for a feature in map units. Returns an invalid QSizeF in case of error.

Static Public Attributes
static const QString	DIAGRAM_RENDERER_NAME_SINGLE_CATEGORY = QStringLiteral( "SingleCategory" )

Protected Member Functions
bool	diagramSettings (const QgsFeature &feature, const QgsRenderContext &c, QgsDiagramSettings &s) const override
	Returns diagram settings for a feature (or `false` if the diagram for the feature is not to be rendered).

QSizeF	diagramSize (const QgsFeature &, const QgsRenderContext &c) const override
	Returns size of the diagram (in painter units) or an invalid size in case of error.

Protected Member Functions inherited from QgsDiagramRenderer
	QgsDiagramRenderer (const QgsDiagramRenderer &other)

void	_readXml (const QDomElement &elem, const QgsReadWriteContext &context)
	Reads internal QgsDiagramRenderer state from a DOM element.

void	_writeXml (QDomElement &rendererElem, QDomDocument &doc, const QgsReadWriteContext &context) const
	Writes internal QgsDiagramRenderer diagram state to a DOM element.

void	convertSizeToMapUnits (QSizeF &size, const QgsRenderContext &context) const
	Converts size from mm to map units.

QgsDiagramRenderer &	operator= (const QgsDiagramRenderer &other)

Additional Inherited Members
Static Protected Member Functions inherited from QgsDiagramRenderer
static int	dpiPaintDevice (const QPainter *)
	Returns the paint device dpi (or -1 in case of error.

Protected Attributes inherited from QgsDiagramRenderer
std::unique_ptr< QgsDiagram >	mDiagram
	Reference to the object that does the real diagram rendering.

bool	mShowAttributeLegend = true
	Whether to show an attribute legend for the diagrams.

Detailed Description

Renders the diagrams for all features with the same settings.

Definition at line 874 of file qgsdiagramrenderer.h.

Constructor & Destructor Documentation

◆ QgsSingleCategoryDiagramRenderer()

QgsSingleCategoryDiagramRenderer::QgsSingleCategoryDiagramRenderer ( )

default

Member Function Documentation

◆ clone()

QgsSingleCategoryDiagramRenderer * QgsSingleCategoryDiagramRenderer::clone ( ) const

overridevirtual

Returns new instance that is equivalent to this one.

Implements QgsDiagramRenderer.

Definition at line 659 of file qgsdiagramrenderer.cpp.

◆ diagramAttributes()

QList< QString > QgsSingleCategoryDiagramRenderer::diagramAttributes ( ) const

inlineoverridevirtual

Returns attribute indices needed for diagram rendering.

Implements QgsDiagramRenderer.

Definition at line 885 of file qgsdiagramrenderer.h.

◆ diagramSettings() [1/2]

QList< QgsDiagramSettings > QgsSingleCategoryDiagramRenderer::diagramSettings ( ) const

overridevirtual

Returns list with all diagram settings in the renderer.

Implements QgsDiagramRenderer.

Definition at line 676 of file qgsdiagramrenderer.cpp.

◆ diagramSettings() [2/2]

bool QgsSingleCategoryDiagramRenderer::diagramSettings	(	const QgsFeature &	feature,
		const QgsRenderContext &	c,
		QgsDiagramSettings &	s
	)		const

overrideprotectedvirtual

Returns diagram settings for a feature (or false if the diagram for the feature is not to be rendered).

Used internally within renderDiagram()

Parameters

feature	the feature
c	render context
s	out: diagram settings for the feature

Implements QgsDiagramRenderer.

Definition at line 664 of file qgsdiagramrenderer.cpp.

◆ diagramSize()

QSizeF QgsSingleCategoryDiagramRenderer::diagramSize	(	const QgsFeature &	feature,
		const QgsRenderContext &	c
	)		const

overrideprotectedvirtual

Returns size of the diagram (in painter units) or an invalid size in case of error.

Parameters

feature	the feature
c	render context

Implements QgsDiagramRenderer.

Definition at line 671 of file qgsdiagramrenderer.cpp.

◆ legendItems()

QList< QgsLayerTreeModelLegendNode * > QgsSingleCategoryDiagramRenderer::legendItems ( QgsLayerTreeLayer * nodeLayer ) const

overridevirtual

Returns list of legend nodes for the diagram.

Note: caller is responsible for deletion of QgsLayerTreeModelLegendNodes

Reimplemented from QgsDiagramRenderer.

Definition at line 1313 of file qgsdiagramrenderer.cpp.

◆ readXml()

void QgsSingleCategoryDiagramRenderer::readXml	(	const QDomElement &	elem,
		const QgsReadWriteContext &	context
	)

overridevirtual

Reads diagram state from a DOM element.

Subclasses should ensure that _readXml() is called by their readXml implementation to restore the general QgsDiagramRenderer settings.

See also: writeXml()

Implements QgsDiagramRenderer.

Definition at line 683 of file qgsdiagramrenderer.cpp.

◆ rendererName()

QString QgsSingleCategoryDiagramRenderer::rendererName ( ) const

inlineoverridevirtual

Implements QgsDiagramRenderer.

Definition at line 883 of file qgsdiagramrenderer.h.

◆ setDiagramSettings()

void QgsSingleCategoryDiagramRenderer::setDiagramSettings ( const QgsDiagramSettings & s )

inline

Definition at line 887 of file qgsdiagramrenderer.h.

◆ writeXml()

void QgsSingleCategoryDiagramRenderer::writeXml	(	QDomElement &	layerElem,
		QDomDocument &	doc,
		const QgsReadWriteContext &	context
	)		const

overridevirtual

Writes diagram state to a DOM element.

Subclasses should ensure that _writeXml() is called by their writeXml implementation to save the general QgsDiagramRenderer settings.

See also: readXml()

Implements QgsDiagramRenderer.

Definition at line 695 of file qgsdiagramrenderer.cpp.

Member Data Documentation

◆ DIAGRAM_RENDERER_NAME_SINGLE_CATEGORY

const QString QgsSingleCategoryDiagramRenderer::DIAGRAM_RENDERER_NAME_SINGLE_CATEGORY = QStringLiteral( "SingleCategory" )

static

Definition at line 877 of file qgsdiagramrenderer.h.

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

/build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/qgsdiagramrenderer.h
/build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/qgsdiagramrenderer.cpp

Public Member Functions

Static Public Attributes

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsSingleCategoryDiagramRenderer()

Member Function Documentation

◆ clone()

◆ diagramAttributes()

◆ diagramSettings() [1/2]

◆ diagramSettings() [2/2]

◆ diagramSize()

◆ legendItems()

◆ readXml()

◆ rendererName()

◆ setDiagramSettings()

◆ writeXml()

Member Data Documentation

◆ DIAGRAM_RENDERER_NAME_SINGLE_CATEGORY