QgsDiagram Class Reference

Base class for all diagram types. More...

#include <qgsdiagram.h>

Inheritance diagram for QgsDiagram:

Public Member Functions
virtual	~QgsDiagram ()
virtual QgsDiagram *	clone () const =0
	Returns an instance that is equivalent to this one.
void	clearCache ()
QgsExpression *	getExpression (const QString &expression, const QgsFields *fields)
virtual Q_DECL_DEPRECATED void	renderDiagram (const QgsAttributes &att, QgsRenderContext &c, const QgsDiagramSettings &s, const QPointF &position)
virtual void	renderDiagram (const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, const QPointF &position)=0
	Draws the diagram at the given position (in pixel coordinates)
virtual QString	diagramName () const =0
virtual QSizeF	diagramSize (const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s)=0
	Returns the size in map units the diagram will use to render.
virtual Q_DECL_DEPRECATED QSizeF	diagramSize (const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is)
virtual QSizeF	diagramSize (const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is)=0
	Returns the size in map units the diagram will use to render.

Protected Member Functions
	QgsDiagram ()
	QgsDiagram (const QgsDiagram &other)
void	setPenWidth (QPen &pen, const QgsDiagramSettings &s, const QgsRenderContext &c)
	Changes the pen width to match the current settings and rendering context.
QSizeF	sizePainterUnits (const QSizeF &size, const QgsDiagramSettings &s, const QgsRenderContext &c)
	Calculates a size to match the current settings and rendering context.
float	sizePainterUnits (float l, const QgsDiagramSettings &s, const QgsRenderContext &c)
	Calculates a length to match the current settings and rendering context.
QFont	scaledFont (const QgsDiagramSettings &s, const QgsRenderContext &c)
	Calculates a size to match the current settings and rendering context.

Detailed Description

Base class for all diagram types.

Constructor & Destructor Documentation

virtual QgsDiagram::~QgsDiagram ( )

inlinevirtual

QgsDiagram::QgsDiagram ( )

protected

QgsDiagram::QgsDiagram ( const QgsDiagram &  other )

protected

Member Function Documentation

void QgsDiagram::clearCache

(

)

virtual QgsDiagram* QgsDiagram::clone ( ) const

pure virtual

Returns an instance that is equivalent to this one.

Note

added in 2.4

Implemented in QgsTextDiagram, QgsHistogramDiagram, and QgsPieDiagram.

virtual QString QgsDiagram::diagramName ( ) const

pure virtual

Implemented in QgsTextDiagram, QgsHistogramDiagram, and QgsPieDiagram.

virtual QSizeF QgsDiagram::diagramSize ( const QgsAttributes &  attributes, const QgsRenderContext &  c, const QgsDiagramSettings &  s  )

pure virtual

Returns the size in map units the diagram will use to render.

Implemented in QgsTextDiagram, QgsHistogramDiagram, and QgsPieDiagram.

QSizeF QgsDiagram::diagramSize ( const QgsAttributes &  attributes, const QgsRenderContext &  c, const QgsDiagramSettings &  s, const QgsDiagramInterpolationSettings &  is  )

virtual

Deprecated:

`QSizeF diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is )` should be used instead

virtual QSizeF QgsDiagram::diagramSize ( const QgsFeature &  feature, const QgsRenderContext &  c, const QgsDiagramSettings &  s, const QgsDiagramInterpolationSettings &  is  )

pure virtual

Returns the size in map units the diagram will use to render.

Interpolate size

Implemented in QgsTextDiagram, QgsHistogramDiagram, and QgsPieDiagram.

QgsExpression * QgsDiagram::getExpression	(	const QString &	expression,
		const QgsFields *	fields
	)

void QgsDiagram::renderDiagram ( const QgsAttributes &  att, QgsRenderContext &  c, const QgsDiagramSettings &  s, const QPointF &  position  )

virtual

Deprecated:

`void renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, const QPointF& position )` should be used instead

virtual void QgsDiagram::renderDiagram ( const QgsFeature &  feature, QgsRenderContext &  c, const QgsDiagramSettings &  s, const QPointF &  position  )

pure virtual

Draws the diagram at the given position (in pixel coordinates)

Implemented in QgsTextDiagram, QgsHistogramDiagram, and QgsPieDiagram.

QFont QgsDiagram::scaledFont ( const QgsDiagramSettings &  s, const QgsRenderContext &  c  )

protected

Calculates a size to match the current settings and rendering context.

Parameters

s	The settings that contain the font size and size type
c	The rendering specifying the proper scale units for pixel conversion

Returns

The properly scaled font for rendering

void QgsDiagram::setPenWidth ( QPen &  pen, const QgsDiagramSettings &  s, const QgsRenderContext &  c  )

protected

Changes the pen width to match the current settings and rendering context.

Parameters

pen	The pen to modify
s	The settings that specify the pen width
c	The rendering specifying the proper scale units for pixel conversion

QSizeF QgsDiagram::sizePainterUnits ( const QSizeF &  size, const QgsDiagramSettings &  s, const QgsRenderContext &  c  )

protected

Calculates a size to match the current settings and rendering context.

Parameters

size	The size to convert
s	The settings that specify the size type
c	The rendering specifying the proper scale units for pixel conversion

Returns

The converted size for rendering

float QgsDiagram::sizePainterUnits ( float  l, const QgsDiagramSettings &  s, const QgsRenderContext &  c  )

protected

Calculates a length to match the current settings and rendering context.

Parameters

l	The length to convert
s	Unused
c	The rendering specifying the proper scale units for pixel conversion

Returns

The converted length for rendering

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/diagram/qgsdiagram.h
• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/diagram/qgsdiagram.cpp