QGIS API Documentation 3.39.0-Master (3783037d301)
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Public Member Functions | Static Public Attributes | List of all members
QgsPieDiagram Class Reference

A pie chart diagram. More...

#include <qgspiediagram.h>

Inheritance diagram for QgsPieDiagram:
Inheritance graph
[legend]

Public Member Functions

 QgsPieDiagram ()
 
QgsPieDiagramclone () const override
 Returns an instance that is equivalent to this one.
 
QString diagramName () const override
 Gets a descriptive name for this diagram type.
 
QSizeF diagramSize (const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s) override
 Returns the size in map units the diagram will use to render.
 
QSizeF diagramSize (const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &interpolationSettings) override
 Returns the size in map units the diagram will use to render. Interpolate size.
 
double legendSize (double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &interpolationSettings) const override
 Returns the size of the legend item for the diagram corresponding to a specified value.
 
void renderDiagram (const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position) override
 Draws the diagram at the given position (in pixel coordinates)
 
- Public Member Functions inherited from QgsDiagram
virtual ~QgsDiagram ()
 
void clearCache ()
 
QgsExpressiongetExpression (const QString &expression, const QgsExpressionContext &context)
 Returns a prepared expression for the specified context.
 

Static Public Attributes

static const QString DIAGRAM_NAME_PIE = QStringLiteral( "Pie" )
 

Additional Inherited Members

- Protected Member Functions inherited from QgsDiagram
 QgsDiagram ()=default
 
 QgsDiagram (const QgsDiagram &other)
 
QFont scaledFont (const QgsDiagramSettings &s, const QgsRenderContext &c)
 Calculates a size to match the current settings and rendering context.
 
void setPenWidth (QPen &pen, const QgsDiagramSettings &s, const QgsRenderContext &c)
 Changes the pen width to match the current settings and rendering context.
 
QSizeF sizeForValue (double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &interpolationSettings) const
 Returns the scaled size of a diagram for a value, respecting the specified diagram interpolation settings.
 
double sizePainterUnits (double l, const QgsDiagramSettings &s, const QgsRenderContext &c)
 Calculates a length to match the current settings and rendering context.
 
QSizeF sizePainterUnits (QSizeF size, const QgsDiagramSettings &s, const QgsRenderContext &c)
 Calculates a size to match the current settings and rendering context.
 

Detailed Description

A pie chart diagram.

Definition at line 36 of file qgspiediagram.h.

Constructor & Destructor Documentation

◆ QgsPieDiagram()

QgsPieDiagram::QgsPieDiagram ( )

Definition at line 24 of file qgspiediagram.cpp.

Member Function Documentation

◆ clone()

QgsPieDiagram * QgsPieDiagram::clone ( ) const
overridevirtual

Returns an instance that is equivalent to this one.

Implements QgsDiagram.

Definition at line 30 of file qgspiediagram.cpp.

◆ diagramName()

QString QgsPieDiagram::diagramName ( ) const
overridevirtual

Gets a descriptive name for this diagram type.

Implements QgsDiagram.

Definition at line 71 of file qgspiediagram.cpp.

◆ diagramSize() [1/2]

QSizeF QgsPieDiagram::diagramSize ( const QgsAttributes attributes,
const QgsRenderContext c,
const QgsDiagramSettings s 
)
overridevirtual

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

Implements QgsDiagram.

Definition at line 76 of file qgspiediagram.cpp.

◆ diagramSize() [2/2]

QSizeF QgsPieDiagram::diagramSize ( const QgsFeature feature,
const QgsRenderContext c,
const QgsDiagramSettings s,
const QgsDiagramInterpolationSettings interpolationSettings 
)
overridevirtual

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

Implements QgsDiagram.

Definition at line 35 of file qgspiediagram.cpp.

◆ legendSize()

double QgsPieDiagram::legendSize ( double  value,
const QgsDiagramSettings s,
const QgsDiagramInterpolationSettings interpolationSettings 
) const
overridevirtual

Returns the size of the legend item for the diagram corresponding to a specified value.

Parameters
valuevalue to return legend item size for
sdiagram settings
interpolationSettingsinterpolation settings

Implements QgsDiagram.

Definition at line 65 of file qgspiediagram.cpp.

◆ renderDiagram()

void QgsPieDiagram::renderDiagram ( const QgsFeature feature,
QgsRenderContext c,
const QgsDiagramSettings s,
QPointF  position 
)
overridevirtual

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

Implements QgsDiagram.

Definition at line 83 of file qgspiediagram.cpp.

Member Data Documentation

◆ DIAGRAM_NAME_PIE

const QString QgsPieDiagram::DIAGRAM_NAME_PIE = QStringLiteral( "Pie" )
static

Definition at line 39 of file qgspiediagram.h.


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