QValueAxis Class

The QValueAxis class adds values to a graph's axes. More...

Header:	#include <QValueAxis>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Graphs) target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake:	QT += graphs
Instantiated By:	ValueAxis
Inherits:	QAbstractAxis
Status:	Technical Preview

List of all members, including inherited members
QValueAxis is part of Qt Graphs C++ Classes for 2D.

Properties

labelDecimals : int
labelFormat : QString
max : qreal
min : qreal

minorTickCount : int
tickAnchor : qreal
tickInterval : qreal

Public Functions

	QValueAxis(QObject *parent = nullptr)
virtual	~QValueAxis()
int	labelDecimals() const
QString	labelFormat() const
qreal	max() const
qreal	min() const
int	minorTickCount() const
void	setLabelDecimals(int decimals)
void	setLabelFormat(const QString &format)
void	setMax(qreal max)
void	setMin(qreal min)
void	setMinorTickCount(int count)
void	setRange(qreal min, qreal max)
void	setTickAnchor(qreal anchor)
void	setTickInterval(qreal insterval)
qreal	tickAnchor() const
qreal	tickInterval() const

Reimplemented Public Functions

virtual QAbstractAxis::AxisType type() const override

Signals

void	labelDecimalsChanged(int decimals)
void	labelFormatChanged(const QString &format)
void	maxChanged(qreal max)
void	minChanged(qreal min)
void	minorTickCountChanged(int minorTickCount)
void	rangeChanged(qreal min, qreal max)
void	tickAnchorChanged(qreal tickAnchor)
void	tickIntervalChanged(qreal tickInterval)

Detailed Description

A value axis can be set up to show an axis line with tick marks, grid lines, and shades. The values on the axis are drawn at the positions of tick marks.

Property Documentation

labelDecimals : int

This property holds the number of decimals used for showing the labels. When set to -1, decimal amount is adjusted automatically based on the values range. The default value is -1.

Access functions:

int	labelDecimals() const
void	setLabelDecimals(int decimals)

Notifier signal:

void	labelDecimalsChanged(int decimals)

labelFormat : QString

This property holds the label format of the axis.

The format string supports the following conversion specifiers, length modifiers, and flags provided by printf() in the standard C++ library: d, i, o, x, X, f, F, e, E, g, G, c.

The default value is empty, in which case 'f' format is used.

Access functions:

QString	labelFormat() const
void	setLabelFormat(const QString &format)

Notifier signal:

void	labelFormatChanged(const QString &format)

See also QString::asprintf().

max : qreal

This property holds the maximum value on the axis.

When setting this property, the minimum value is adjusted if necessary, to ensure that the range remains valid. The default value is 10.0

Access functions:

qreal	max() const
void	setMax(qreal max)

Notifier signal:

void	maxChanged(qreal max)

min : qreal

This property holds the minimum value on the axis.

When setting this property, the maximum value is adjusted if necessary, to ensure that the range remains valid. The default value is 0.0

Access functions:

qreal	min() const
void	setMin(qreal min)

Notifier signal:

void	minChanged(qreal min)

minorTickCount : int

This property holds the number of minor tick marks on the axis. This indicates how many grid lines are drawn between major ticks on the graph. Labels are not drawn for minor ticks. The default value is 0.

Access functions:

int	minorTickCount() const
void	setMinorTickCount(int count)

Notifier signal:

void	minorTickCountChanged(int minorTickCount)

tickAnchor : qreal

This property holds the base value where the dynamically placed tick marks and labels are started from. The default value is 0.

Access functions:

qreal	tickAnchor() const
void	setTickAnchor(qreal anchor)

Notifier signal:

void	tickAnchorChanged(qreal tickAnchor)

tickInterval : qreal

This property holds the interval between dynamically placed tick marks and labels. The default value is 0, which means that intervals are automatically calculated based on the min and max range.

Access functions:

qreal	tickInterval() const
void	setTickInterval(qreal insterval)

Notifier signal:

void	tickIntervalChanged(qreal tickInterval)

Member Function Documentation

`[explicit]` QValueAxis::QValueAxis(QObject **parent* = nullptr)

Constructs an axis object that is a child of parent.

`[virtual noexcept]` QValueAxis::~QValueAxis()

Destroys the object.

`[signal]` void QValueAxis::labelDecimalsChanged(int decimals)

This signal is emitted when the decimals amount of axis labels changes.

Note: Notifier signal for property labelDecimals.

`[signal]` void QValueAxis::labelFormatChanged(const QString &format)

This signal is emitted when the format of axis labels changes.

Note: Notifier signal for property labelFormat.

`[signal]` void QValueAxis::maxChanged(qreal max)

This signal is emitted when the maximum value of the axis, specified by max, changes.

Note: Notifier signal for property max.

`[signal]` void QValueAxis::minChanged(qreal min)

This signal is emitted when the minimum value of the axis, specified by min, changes.

Note: Notifier signal for property min.

`[signal]` void QValueAxis::minorTickCountChanged(int minorTickCount)

This signal is emitted when the number of minor tick marks on the axis, specified by minorTickCount, changes.

Note: Notifier signal for property minorTickCount.

`[signal]` void QValueAxis::rangeChanged(qreal min, qreal max)

This signal is emitted when the minimum or maximum value of the axis, specified by min and max, changes.

void QValueAxis::setRange(qreal min, qreal max)

Sets the range from min to max on the axis. If min is greater than max, this function returns without making any changes.

`[signal]` void QValueAxis::tickAnchorChanged(qreal tickAnchor)

This signal is emitted when the tick anchoring value, specified by tickAnchor, changes.

Note: Notifier signal for property tickAnchor.

`[signal]` void QValueAxis::tickIntervalChanged(qreal tickInterval)

This signal is emitted when the tick interval value, specified by tickInterval, changes.

Note: Notifier signal for property tickInterval.

`[override virtual]` QAbstractAxis::AxisType QValueAxis::type() const

Reimplements: QAbstractAxis::type() const.

Returns the type of the axis.

Contents

QValueAxis Class

Properties

Public Functions

Reimplemented Public Functions

Signals

Detailed Description

Property Documentation

labelDecimals : int

labelFormat : QString

max : qreal

min : qreal

minorTickCount : int

tickAnchor : qreal

tickInterval : qreal

Member Function Documentation

[explicit] QValueAxis::QValueAxis(QObject *parent = nullptr)

[virtual noexcept] QValueAxis::~QValueAxis()

[signal] void QValueAxis::labelDecimalsChanged(int decimals)

[signal] void QValueAxis::labelFormatChanged(const QString &format)

[signal] void QValueAxis::maxChanged(qreal max)

[signal] void QValueAxis::minChanged(qreal min)

[signal] void QValueAxis::minorTickCountChanged(int minorTickCount)

[signal] void QValueAxis::rangeChanged(qreal min, qreal max)

void QValueAxis::setRange(qreal min, qreal max)

[signal] void QValueAxis::tickAnchorChanged(qreal tickAnchor)

[signal] void QValueAxis::tickIntervalChanged(qreal tickInterval)

[override virtual] QAbstractAxis::AxisType QValueAxis::type() const

`[explicit]` QValueAxis::QValueAxis(QObject **parent* = nullptr)

`[virtual noexcept]` QValueAxis::~QValueAxis()

`[signal]` void QValueAxis::labelDecimalsChanged(int decimals)

`[signal]` void QValueAxis::labelFormatChanged(const QString &format)

`[signal]` void QValueAxis::maxChanged(qreal max)

`[signal]` void QValueAxis::minChanged(qreal min)

`[signal]` void QValueAxis::minorTickCountChanged(int minorTickCount)

`[signal]` void QValueAxis::rangeChanged(qreal min, qreal max)

`[signal]` void QValueAxis::tickAnchorChanged(qreal tickAnchor)

`[signal]` void QValueAxis::tickIntervalChanged(qreal tickInterval)

`[override virtual]` QAbstractAxis::AxisType QValueAxis::type() const