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QgsDiagramRendererV2 Class Referenceabstract

Returns diagram settings for a feature. More...

#include <qgsdiagramrendererv2.h>

Inheritance diagram for QgsDiagramRendererV2:
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Collaboration diagram for QgsDiagramRendererV2:
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Public Member Functions

 QgsDiagramRendererV2 ()
 
virtual ~QgsDiagramRendererV2 ()
 
virtual QgsDiagramRendererV2clone () const =0
 Returns new instance that is equivalent to this one. More...
 
virtual QSizeF sizeMapUnits (const QgsFeature &feature, const QgsRenderContext &c)
 Returns size of the diagram for a feature in map units. More...
 
virtual QString rendererName () const =0
 
virtual QList< QString > diagramAttributes () const =0
 Returns attribute indices needed for diagram rendering. More...
 
void renderDiagram (const QgsFeature &feature, QgsRenderContext &c, const QPointF &pos)
 
void setDiagram (QgsDiagram *d)
 
QgsDiagramdiagram () const
 
virtual QList< QgsDiagramSettingsdiagramSettings () const =0
 Returns list with all diagram settings in the renderer. More...
 
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

 QgsDiagramRendererV2 (const QgsDiagramRendererV2 &other)
 
virtual bool diagramSettings (const QgsFeature &feature, 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). More...
 
virtual QSizeF diagramSize (const QgsFeature &features, const QgsRenderContext &c)=0
 Returns size of the diagram (in painter units) or an invalid size in case of error. More...
 
void convertSizeToMapUnits (QSizeF &size, const QgsRenderContext &context) const
 Converts size from mm to map units. More...
 
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. More...
 

Protected Attributes

QgsDiagrammDiagram
 Reference to the object that does the real diagram rendering. More...
 

Detailed Description

Returns diagram settings for a feature.

Definition at line 155 of file qgsdiagramrendererv2.h.

Constructor & Destructor Documentation

QgsDiagramRendererV2::QgsDiagramRendererV2 ( )

Definition at line 272 of file qgsdiagramrendererv2.cpp.

QgsDiagramRendererV2::~QgsDiagramRendererV2 ( )
virtual

Definition at line 277 of file qgsdiagramrendererv2.cpp.

References mDiagram.

QgsDiagramRendererV2::QgsDiagramRendererV2 ( const QgsDiagramRendererV2 other)
protected

Definition at line 288 of file qgsdiagramrendererv2.cpp.

Member Function Documentation

void QgsDiagramRendererV2::_readXML ( const QDomElement &  elem,
const QgsVectorLayer layer 
)
protected
void QgsDiagramRendererV2::_writeXML ( QDomElement &  rendererElem,
QDomDocument &  doc,
const QgsVectorLayer layer 
) const
protected
virtual QgsDiagramRendererV2* QgsDiagramRendererV2::clone ( ) const
pure virtual

Returns new instance that is equivalent to this one.

Note
added in 2.4

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by QgsPalLabeling::addDiagramLayer().

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

Converts size from mm to map units.

Definition at line 325 of file qgsdiagramrendererv2.cpp.

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

Referenced by sizeMapUnits().

QgsDiagram* QgsDiagramRendererV2::diagram ( ) const
inline

Definition at line 177 of file qgsdiagramrendererv2.h.

Referenced by QgsVectorLayerRenderer::prepareDiagrams().

virtual QList<QString> QgsDiagramRendererV2::diagramAttributes ( ) const
pure virtual

Returns attribute indices needed for diagram rendering.

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

Referenced by QgsVectorLayerRenderer::prepareDiagrams().

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 QgsFeature feature,
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
featurethe feature
crender context
sout: diagram settings for the feature

Implemented in QgsLinearlyInterpolatedDiagramRenderer, and QgsSingleCategoryDiagramRenderer.

virtual QSizeF QgsDiagramRendererV2::diagramSize ( const QgsFeature features,
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 337 of file qgsdiagramrendererv2.cpp.

virtual void QgsDiagramRendererV2::readXML ( const QDomElement &  elem,
const QgsVectorLayer layer 
)
pure virtual
void QgsDiagramRendererV2::renderDiagram ( const QgsFeature feature,
QgsRenderContext c,
const QPointF &  pos 
)
virtual QString QgsDiagramRendererV2::rendererName ( ) const
pure virtual
void QgsDiagramRendererV2::setDiagram ( QgsDiagram d)

Definition at line 282 of file qgsdiagramrendererv2.cpp.

References mDiagram.

QSizeF QgsDiagramRendererV2::sizeMapUnits ( const QgsFeature feature,
const QgsRenderContext c 
)
virtual

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

Returns an invalid QSizeF in case of error

Definition at line 309 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

Member Data Documentation

QgsDiagram* QgsDiagramRendererV2::mDiagram
protected

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