QgsDiagramRendererV2 Class Reference

Returns diagram settings for a feature. More...

#include <qgsdiagramrendererv2.h>

Inheritance diagram for QgsDiagramRendererV2:

Public Member Functions
	QgsDiagramRendererV2 ()
virtual	~QgsDiagramRendererV2 ()
virtual QSizeF	sizeMapUnits (const QgsAttributes &attributes, const QgsRenderContext &c)
	Returns size of the diagram for feature f in map units.
virtual QString	rendererName () const =0
virtual QList< int >	diagramAttributes () const =0
	Returns attribute indices needed for diagram rendering.
void	renderDiagram (const QgsAttributes &att, QgsRenderContext &c, const QPointF &pos)
void	setDiagram (QgsDiagram *d)
const QgsDiagram *	diagram () const
virtual QList< QgsDiagramSettings >	diagramSettings () const =0
	Returns list with all diagram settings in the renderer.
virtual void	readXML (const QDomElement &elem, const QgsVectorLayer *layer)=0
virtual void	writeXML (QDomElement &layerElem, QDomDocument &doc, const QgsVectorLayer *layer) const =0

Protected Member Functions
virtual bool	diagramSettings (const QgsAttributes &att, const QgsRenderContext &c, QgsDiagramSettings &s)=0
	Returns diagram settings for a feature (or false if the diagram for the feature is not to be rendered).
virtual QSizeF	diagramSize (const QgsAttributes &attributes, const QgsRenderContext &c)=0
	Returns size of the diagram (in painter units) or an invalid size in case of error.
void	convertSizeToMapUnits (QSizeF &size, const QgsRenderContext &context) const
	Converts size from mm to map units.
void	_readXML (const QDomElement &elem, const QgsVectorLayer *layer)
void	_writeXML (QDomElement &rendererElem, QDomDocument &doc, const QgsVectorLayer *layer) const

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

Protected Attributes
QgsDiagram *	mDiagram
	Reference to the object that does the real diagram rendering.

Detailed Description

Returns diagram settings for a feature.

Definition at line 163 of file qgsdiagramrendererv2.h.

Constructor & Destructor Documentation

QgsDiagramRendererV2::QgsDiagramRendererV2

(

)

Definition at line 248 of file qgsdiagramrendererv2.cpp.

QgsDiagramRendererV2::~QgsDiagramRendererV2 ( )

virtual

Definition at line 252 of file qgsdiagramrendererv2.cpp.

References mDiagram.

Member Function Documentation

void QgsDiagramRendererV2::_readXML ( const QDomElement &  elem, const QgsVectorLayer *  layer  )

protected

Definition at line 320 of file qgsdiagramrendererv2.cpp.

References mDiagram.

Referenced by QgsSingleCategoryDiagramRenderer::readXML(), and QgsLinearlyInterpolatedDiagramRenderer::readXML().

void QgsDiagramRendererV2::_writeXML ( QDomElement &  rendererElem, QDomDocument &  doc, const QgsVectorLayer *  layer  ) const

protected

Definition at line 344 of file qgsdiagramrendererv2.cpp.

References mDiagram.

Referenced by QgsSingleCategoryDiagramRenderer::writeXML(), and QgsLinearlyInterpolatedDiagramRenderer::writeXML().

void QgsDiagramRendererV2::convertSizeToMapUnits ( QSizeF &  size, const QgsRenderContext &  context  ) const

protected

Converts size from mm to map units.

Definition at line 295 of file qgsdiagramrendererv2.cpp.

References QgsRenderContext::mapToPixel(), QgsMapToPixel::mapUnitsPerPixel(), and QgsRenderContext::scaleFactor().

Referenced by sizeMapUnits().

const QgsDiagram* QgsDiagramRendererV2::diagram ( ) const

inline

Definition at line 181 of file qgsdiagramrendererv2.h.

virtual QList<int> QgsDiagramRendererV2::diagramAttributes ( ) const

pure virtual

Returns attribute indices needed for diagram rendering.

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by QgsVectorLayer::prepareLabelingAndDiagrams().

virtual QList<QgsDiagramSettings> QgsDiagramRendererV2::diagramSettings ( ) const

pure virtual

Returns list with all diagram settings in the renderer.

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by renderDiagram(), and sizeMapUnits().

virtual bool QgsDiagramRendererV2::diagramSettings ( const QgsAttributes &  att, const QgsRenderContext &  c, QgsDiagramSettings &  s  )

protectedpure virtual

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

Used internally within renderDiagram()

Parameters

att	attribute map
c	render context
s	out: diagram settings for the feature

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

virtual QSizeF QgsDiagramRendererV2::diagramSize ( const QgsAttributes &  attributes, const QgsRenderContext &  c  )

protectedpure virtual

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

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by sizeMapUnits().

int QgsDiagramRendererV2::dpiPaintDevice ( const QPainter *  painter )

staticprotected

Returns the paint device dpi (or -1 in case of error.

Definition at line 307 of file qgsdiagramrendererv2.cpp.

virtual void QgsDiagramRendererV2::readXML ( const QDomElement &  elem, const QgsVectorLayer *  layer  )

pure virtual

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by QgsVectorLayer::readSymbology().

void QgsDiagramRendererV2::renderDiagram	(	const QgsAttributes &	att,
		QgsRenderContext &	c,
		const QPointF &	pos
	)

Definition at line 263 of file qgsdiagramrendererv2.cpp.

References diagramSettings(), and mDiagram.

virtual QString QgsDiagramRendererV2::rendererName ( ) const

pure virtual

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

void QgsDiagramRendererV2::setDiagram

(

QgsDiagram *

d

)

Definition at line 257 of file qgsdiagramrendererv2.cpp.

References mDiagram.

QSizeF QgsDiagramRendererV2::sizeMapUnits ( const QgsAttributes &  attributes, const QgsRenderContext &  c  )

virtual

Returns size of the diagram for feature f in map units.

Returns an invalid QSizeF in case of error

Definition at line 279 of file qgsdiagramrendererv2.cpp.

References convertSizeToMapUnits(), diagramSettings(), diagramSize(), QgsDiagramSettings::MM, size, and QgsDiagramSettings::sizeType.

Referenced by QgsPalLabeling::registerDiagramFeature().

virtual void QgsDiagramRendererV2::writeXML ( QDomElement &  layerElem, QDomDocument &  doc, const QgsVectorLayer *  layer  ) const

pure virtual

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by QgsVectorLayer::writeSymbology().

Member Data Documentation

QgsDiagram* QgsDiagramRendererV2::mDiagram

protected

Reference to the object that does the real diagram rendering.

Definition at line 212 of file qgsdiagramrendererv2.h.

Referenced by _readXML(), _writeXML(), QgsSingleCategoryDiagramRenderer::diagramSize(), QgsLinearlyInterpolatedDiagramRenderer::diagramSize(), renderDiagram(), setDiagram(), and ~QgsDiagramRendererV2().

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

• /tmp/buildd/qgis-2.0.1/src/core/qgsdiagramrendererv2.h
• /tmp/buildd/qgis-2.0.1/src/core/qgsdiagramrendererv2.cpp