QgsHistogramDiagram Class Reference

A histogram style diagram. More...

#include <qgshistogramdiagram.h>

Inheritance diagram for QgsHistogramDiagram:

Public Member Functions
	QgsHistogramDiagram ()
QgsHistogramDiagram *	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_HISTOGRAM = QStringLiteral( "Histogram" )

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 histogram style diagram.

Definition at line 39 of file qgshistogramdiagram.h.

Constructor & Destructor Documentation

QgsHistogramDiagram()

QgsHistogramDiagram::QgsHistogramDiagram

(

)

Definition at line 27 of file qgshistogramdiagram.cpp.

Member Function Documentation

clone()

QgsHistogramDiagram * QgsHistogramDiagram::clone ( ) const

overridevirtual

Returns an instance that is equivalent to this one.

Implements QgsDiagram.

Definition at line 34 of file qgshistogramdiagram.cpp.

diagramName()

QString QgsHistogramDiagram::diagramName ( ) const

overridevirtual

Gets a descriptive name for this diagram type.

Implements QgsDiagram.

Definition at line 116 of file qgshistogramdiagram.cpp.

diagramSize() [1/2]

QSizeF QgsHistogramDiagram::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 121 of file qgshistogramdiagram.cpp.

diagramSize() [2/2]

QSizeF QgsHistogramDiagram::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 39 of file qgshistogramdiagram.cpp.

legendSize()

double QgsHistogramDiagram::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 101 of file qgshistogramdiagram.cpp.

renderDiagram()

void QgsHistogramDiagram::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 169 of file qgshistogramdiagram.cpp.

Member Data Documentation

DIAGRAM_NAME_HISTOGRAM

const QString QgsHistogramDiagram::DIAGRAM_NAME_HISTOGRAM = QStringLiteral( "Histogram" )

static

Definition at line 42 of file qgshistogramdiagram.h.

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

• /build/qgis-3.99.0+git20251207+21b3aa880ba+99sid/src/core/diagram/qgshistogramdiagram.h
• /build/qgis-3.99.0+git20251207+21b3aa880ba+99sid/src/core/diagram/qgshistogramdiagram.cpp