QgsGraduatedHistogramWidget Class Reference

Graphical histogram for displaying distribution of field values and editing range breaks for a QgsGraduatedSymbolRenderer renderer. More...

#include <qgsgraduatedhistogramwidget.h>

Inheritance diagram for QgsGraduatedHistogramWidget:

Signals
void	rangesModified (bool rangesAdded)
	Emitted when the user modifies the graduated ranges using the histogram widget.

Public Member Functions
	QgsGraduatedHistogramWidget (QWidget *parent=nullptr)
	QgsGraduatedHistogramWidget constructor.
void	setRenderer (QgsGraduatedSymbolRenderer *renderer)
	Sets the QgsGraduatedSymbolRenderer renderer associated with the histogram.
Public Member Functions inherited from QgsHistogramWidget
	QgsHistogramWidget (QWidget *parent=nullptr, QgsVectorLayer *layer=nullptr, const QString &fieldOrExp=QString())
	QgsHistogramWidget constructor.
	~QgsHistogramWidget () override
QBrush	brush () const
	Returns the brush used when drawing histogram bars.
QgsRangeList	graduatedRanges () const
	Returns the graduated ranges associated with the histogram.
QgsVectorLayer *	layer ()
	Returns the layer currently associated with the widget.
QPen	pen () const
	Returns the pen used when drawing histogram bars.
void	setBrush (const QBrush &brush)
	Sets the brush used for drawing histogram bars.
void	setGraduatedRanges (const QgsRangeList &ranges)
	Sets the graduated ranges associated with the histogram.
void	setPen (const QPen &pen)
	Sets the pen to use when drawing histogram bars.
void	setXAxisTitle (const QString &title)
	Sets the title for the histogram's x-axis.
void	setYAxisTitle (const QString &title)
	Sets the title for the histogram's y-axis.
QString	sourceFieldExp () const
	Returns the source field name or expression used to calculate values displayed in the histogram.
QString	xAxisTitle () const
	Returns the title for the histogram's x-axis.
QString	yAxisTitle () const
	Returns the title for the histogram's y-axis.

Protected Member Functions
void	drawHistogram () override
	Updates and redraws the histogram.

Additional Inherited Members
Public Slots inherited from QgsHistogramWidget
void	refresh ()
	Redraws the histogram.
void	refreshValues ()
	Refreshes the values for the histogram by fetching them from the layer.
void	setLayer (QgsVectorLayer *layer)
	Sets the vector layer associated with the histogram.
void	setSourceFieldExp (const QString &fieldOrExp)
	Sets the source field or expression to use for values in the histogram.
Protected Attributes inherited from QgsHistogramWidget
QwtPlot *	mPlot = nullptr
QList< QwtPlotMarker * >	mRangeMarkers
QgsRangeList	mRanges

Detailed Description

Graphical histogram for displaying distribution of field values and editing range breaks for a QgsGraduatedSymbolRenderer renderer.

Definition at line 35 of file qgsgraduatedhistogramwidget.h.

Constructor & Destructor Documentation

QgsGraduatedHistogramWidget()

QgsGraduatedHistogramWidget::QgsGraduatedHistogramWidget

(

QWidget *

parent = nullptr

)

QgsGraduatedHistogramWidget constructor.

Parameters

parent

parent widget

Definition at line 45 of file qgsgraduatedhistogramwidget.cpp.

Member Function Documentation

drawHistogram()

void QgsGraduatedHistogramWidget::drawHistogram ( )

overrideprotectedvirtual

Updates and redraws the histogram.

Reimplemented from QgsHistogramWidget.

Definition at line 67 of file qgsgraduatedhistogramwidget.cpp.

rangesModified

void QgsGraduatedHistogramWidget::rangesModified ( bool  rangesAdded )

signal

Emitted when the user modifies the graduated ranges using the histogram widget.

Parameters

rangesAdded

true if the user has added ranges, false if the user has just modified existing range breaks

setRenderer()

void QgsGraduatedHistogramWidget::setRenderer

(

QgsGraduatedSymbolRenderer *

renderer

)

Sets the QgsGraduatedSymbolRenderer renderer associated with the histogram.

The histogram will fetch the ranges from the renderer before every refresh.

Parameters

renderer

associated QgsGraduatedSymbolRenderer

Definition at line 62 of file qgsgraduatedhistogramwidget.cpp.

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

• /build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/gui/symbology/qgsgraduatedhistogramwidget.h
• /build/qgis-3.41.0+git20241119+45a0abf3bec+99sid/src/gui/symbology/qgsgraduatedhistogramwidget.cpp