QgsPieDiagram Class Reference

A pie chart diagram. More...

#include <qgspiediagram.h>

Inheritance diagram for QgsPieDiagram:

Public Member Functions
	QgsPieDiagram ()
QgsPieDiagram *	clone () 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 ()
QgsExpression *	getExpression (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

value	value to return legend item size for
s	diagram settings
interpolationSettings	interpolation 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:

• /build/qgis-3.41.0+git20241225+af5edcb665c+99sid/src/core/diagram/qgspiediagram.h
• /build/qgis-3.41.0+git20241225+af5edcb665c+99sid/src/core/diagram/qgspiediagram.cpp