QgsPlot Class Reference

Base class for plot/chart/graphs. More...

#include <qgsplot.h>

Inheritance diagram for QgsPlot:

Public Types
enum class	DataDefinedProperty : int {   MarginLeft , MarginTop , MarginRight , MarginBottom ,   XAxisMajorInterval , XAxisMinorInterval , XAxisLabelInterval , YAxisMajorInterval ,   YAxisMinorInterval , YAxisLabelInterval , XAxisMinimum , XAxisMaximum ,   YAxisMinimum , YAxisMaximum }
	Data defined properties for different plot types. More...

Public Member Functions
	QgsPlot ()=default
virtual	~QgsPlot ()
QgsPropertyCollection &	dataDefinedProperties ()
	Returns a reference to the plot's property collection, used for data defined overrides.
const QgsPropertyCollection &	dataDefinedProperties () const
	Returns a reference to the plot's property collection, used for data defined overrides.
virtual bool	readXml (const QDomElement &element, const QgsReadWriteContext &context)
	Reads the plot's properties from an XML element.
void	setDataDefinedProperties (const QgsPropertyCollection &collection)
	Sets the plot's property collection, used for data defined overrides.
void	setDataDefinedProperty (DataDefinedProperty key, const QgsProperty &property)
	Sets a data defined property for the plot.
virtual QString	type () const
	Returns the plot's type.
virtual bool	writeXml (QDomElement &element, QDomDocument &document, const QgsReadWriteContext &context) const
	Writes the plot's properties into an XML element.

Static Public Member Functions
static const QgsPropertiesDefinition &	propertyDefinitions ()
	Returns the plot property definitions.

Protected Attributes
QgsPropertyCollection	mDataDefinedProperties

Detailed Description

Base class for plot/chart/graphs.

Warning

This class is not considered stable API, and may change in future!

Since

QGIS 3.26

Definition at line 47 of file qgsplot.h.

Member Enumeration Documentation

DataDefinedProperty

enum class QgsPlot::DataDefinedProperty : int

strong

Data defined properties for different plot types.

Since

QGIS 4.0

Enumerator
MarginLeft	Left margin.
MarginTop	Top margin.
MarginRight	Right margin.
MarginBottom	Bottom margin.
XAxisMajorInterval	Major grid line interval for X axis.
XAxisMinorInterval	Minor grid line interval for X axis.
XAxisLabelInterval	Label interval for X axis.
YAxisMajorInterval	Major grid line interval for Y axis.
YAxisMinorInterval	Minor grid line interval for Y axis.
YAxisLabelInterval	Label interval for Y axis.
XAxisMinimum	Minimum X axis value.
XAxisMaximum	Maximum X axis value.
YAxisMinimum	Minimum Y axis value.
YAxisMaximum	Maximum Y axis value.

Definition at line 95 of file qgsplot.h.

Constructor & Destructor Documentation

QgsPlot()

QgsPlot::QgsPlot ( )

default

~QgsPlot()

QgsPlot::~QgsPlot ( )

virtualdefault

Member Function Documentation

dataDefinedProperties() [1/2]

QgsPropertyCollection & QgsPlot::dataDefinedProperties ( )

inline

Returns a reference to the plot's property collection, used for data defined overrides.

See also

setDataDefinedProperties()

Since

QGIS 4.0

Definition at line 136 of file qgsplot.h.

dataDefinedProperties() [2/2]

const QgsPropertyCollection & QgsPlot::dataDefinedProperties ( ) const

inline

Returns a reference to the plot's property collection, used for data defined overrides.

See also

setDataDefinedProperties()

Since

QGIS 4.0

Definition at line 143 of file qgsplot.h.

propertyDefinitions()

const QgsPropertiesDefinition & QgsPlot::propertyDefinitions ( )

static

Returns the plot property definitions.

Definition at line 84 of file qgsplot.cpp.

readXml()

bool QgsPlot::readXml ( const QDomElement & element, const QgsReadWriteContext & context )

virtual

Reads the plot's properties from an XML element.

Reimplemented in Qgs2DPlot, Qgs2DXyPlot, QgsBarChartPlot, QgsLineChartPlot, and QgsPieChartPlot.

Definition at line 52 of file qgsplot.cpp.

setDataDefinedProperties()

void QgsPlot::setDataDefinedProperties ( const QgsPropertyCollection & collection )

inline

Sets the plot's property collection, used for data defined overrides.

Parameters

collection

property collection. Existing properties will be replaced.

See also

dataDefinedProperties()

Since

QGIS 4.0

Definition at line 151 of file qgsplot.h.

setDataDefinedProperty()

void QgsPlot::setDataDefinedProperty ( DataDefinedProperty key, const QgsProperty & property )

inline

Sets a data defined property for the plot.

Any existing property with the same key will be overwritten.

See also

dataDefinedProperties()

Since

QGIS 4.0

Definition at line 129 of file qgsplot.h.

type()

virtual QString QgsPlot::type ( ) const

inlinevirtual

Returns the plot's type.

Since

QGIS 4.0

Reimplemented in QgsBarChartPlot, QgsLineChartPlot, and QgsPieChartPlot.

Definition at line 121 of file qgsplot.h.

writeXml()

bool QgsPlot::writeXml ( QDomElement & element, QDomDocument & document, const QgsReadWriteContext & context ) const

virtual

Writes the plot's properties into an XML element.

Reimplemented in Qgs2DPlot, Qgs2DXyPlot, QgsBarChartPlot, QgsLineChartPlot, and QgsPieChartPlot.

Definition at line 41 of file qgsplot.cpp.

Member Data Documentation

mDataDefinedProperties

QgsPropertyCollection QgsPlot::mDataDefinedProperties

protected

Definition at line 169 of file qgsplot.h.

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

• /build/qgis-3.99.0+git20251210+2fe06baccd8+99sid/src/core/plot/qgsplot.h
• /build/qgis-3.99.0+git20251210+2fe06baccd8+99sid/src/core/plot/qgsplot.cpp