Quantum GIS API Documentation
1.7.4
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Returns diagram settings for a feature. More...
#include <qgsdiagramrendererv2.h>
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. |
Returns diagram settings for a feature.
Definition at line 95 of file qgsdiagramrendererv2.h.
Definition at line 119 of file qgsdiagramrendererv2.cpp.
QgsDiagramRendererV2::~QgsDiagramRendererV2 | ( | ) | [virtual] |
Definition at line 123 of file qgsdiagramrendererv2.cpp.
References mDiagram.
void QgsDiagramRendererV2::_readXML | ( | const QDomElement & | elem | ) | [protected] |
Definition at line 197 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 215 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 166 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 113 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()
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 184 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 134 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 128 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 150 of file qgsdiagramrendererv2.cpp.
References convertSizeToMapUnits(), diagramSettings(), diagramSize(), QgsDiagramSettings::MM, 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().
QgsDiagram* QgsDiagramRendererV2::mDiagram [protected] |
Reference to the object that does the real diagram rendering.
Definition at line 144 of file qgsdiagramrendererv2.h.
Referenced by _readXML(), _writeXML(), renderDiagram(), setDiagram(), and ~QgsDiagramRendererV2().