Returns diagram settings for a feature. More...

#include <qgsdiagramrendererv2.h>

Inheritance diagram for QgsDiagramRendererV2:

Collaboration diagram for QgsDiagramRendererV2:

Public Member Functions
	QgsDiagramRendererV2 ()
virtual	~QgsDiagramRendererV2 ()
virtual QSizeF	sizeMapUnits (const QgsAttributeMap &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 QgsAttributeMap &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)=0
virtual void	writeXML (QDomElement &layerElem, QDomDocument &doc) const =0
Protected Member Functions
virtual bool	diagramSettings (const QgsAttributeMap &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 QgsAttributeMap &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)
void	_writeXML (QDomElement &rendererElem, QDomDocument &doc) 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 119 of file qgsdiagramrendererv2.h.

Constructor & Destructor Documentation

QgsDiagramRendererV2::QgsDiagramRendererV2 ( )

Definition at line 133 of file qgsdiagramrendererv2.cpp.

QgsDiagramRendererV2::~QgsDiagramRendererV2 ( ) [virtual]

Definition at line 137 of file qgsdiagramrendererv2.cpp.

References mDiagram.

Member Function Documentation

void QgsDiagramRendererV2::_readXML ( const QDomElement & elem ) [protected]

Definition at line 211 of file qgsdiagramrendererv2.cpp.

References mDiagram.

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

void QgsDiagramRendererV2::_writeXML	(	QDomElement &	rendererElem,
		QDomDocument &	doc
	)		const `[protected]`

Definition at line 229 of file qgsdiagramrendererv2.cpp.

References QgsDiagram::diagramName(), and 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 180 of file qgsdiagramrendererv2.cpp.

References QgsRenderContext::constPainter(), dpiPaintDevice(), QgsRenderContext::mapToPixel(), and QgsMapToPixel::mapUnitsPerPixel().

Referenced by sizeMapUnits().

const QgsDiagram* QgsDiagramRendererV2::diagram ( ) const [inline]

Definition at line 137 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(), and QgsPalLabeling::registerDiagramFeature().

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 QgsAttributeMap &	att,
		const QgsRenderContext &	c,
		QgsDiagramSettings &	s
	)		`[protected, pure 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 QgsAttributeMap &	attributes,
		const QgsRenderContext &	c
	)		`[protected, pure 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 ) [static, protected]

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

Definition at line 198 of file qgsdiagramrendererv2.cpp.

Referenced by convertSizeToMapUnits().

virtual void QgsDiagramRendererV2::readXML ( const QDomElement & elem ) [pure virtual]

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by QgsVectorLayer::readSymbology().

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

Definition at line 148 of file qgsdiagramrendererv2.cpp.

References diagramSettings(), mDiagram, and QgsDiagram::renderDiagram().

virtual QString QgsDiagramRendererV2::rendererName ( ) const [pure virtual]

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

void QgsDiagramRendererV2::setDiagram ( QgsDiagram * d )

Definition at line 142 of file qgsdiagramrendererv2.cpp.

References mDiagram.

QSizeF QgsDiagramRendererV2::sizeMapUnits	(	const QgsAttributeMap &	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 164 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 `[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 168 of file qgsdiagramrendererv2.h.

Referenced by _readXML(), _writeXML(), renderDiagram(), setDiagram(), and ~QgsDiagramRendererV2().

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

src/core/qgsdiagramrendererv2.h
src/core/qgsdiagramrendererv2.cpp

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation