Qt 5.8 | Qt Data Visualization | C++ Classes | QValue3DAxis

Qt 5.8.0 Reference Documentation

# QValue3DAxis Class

The QValue3DAxis class is used for manipulating an axis of a graph. More...

Header: | #include <QValue3DAxis>
Since: | QtDataVisualization 1.0
Instantiated By: | ValueAxis3D
Inherits: | QAbstract3DAxis

- List of all members, including inherited members

## Properties

- formatter : QValue3DAxisFormatter *
- labelFormat : QString
- reversed : bool

- segmentCount : int
- subSegmentCount : int

- 10 properties inherited from QAbstract3DAxis

## Public Functions

| QValue3DAxis(QObject *parent = Q_NULLPTR)
virtual | ~QValue3DAxis()
QValue3DAxisFormatter * | formatter() const
QString | labelFormat() const
bool | reversed() const
int | segmentCount() const
void | setFormatter(QValue3DAxisFormatter *formatter)
void | setLabelFormat(const QString &format)
void | setReversed(bool enable)
void | setSegmentCount(int count)
void | setSubSegmentCount(int count)
int | subSegmentCount() const

- 19 public functions inherited from QAbstract3DAxis

## Signals

void | formatterChanged(QValue3DAxisFormatter *formatter)
void | labelFormatChanged(const QString &format)
void | reversedChanged(bool enable)
void | segmentCountChanged(int count)
void | subSegmentCountChanged(int count)

- 10 signals inherited from QAbstract3DAxis

## Detailed Description

The QValue3DAxis class is used for manipulating an axis of a graph.

QValue3DAxis provides an axis that can be given a range of values and segment and subsegment counts to divide the range into.

Labels are drawn between each segment. Grid lines are drawn between each segment and each subsegment.

Note: If visible, there will always be at least two grid lines and labels indicating the minimum and the maximum values of the range, as there is always at least one segment.

## Property Documentation

### formatter : QValue3DAxisFormatter *

Defines the axis formatter to be used. Any existing formatter is deleted when a new formatter is set.

This property was introduced in QtDataVisualization 1.1.

Access functions:

QValue3DAxisFormatter * | formatter() const
void | setFormatter(QValue3DAxisFormatter *formatter)

Notifier signal:

void | formatterChanged(QValue3DAxisFormatter *formatter)

### labelFormat : QString

Defines the label format to be used for the labels on this axis. How the format is interpreted depends on the axis formatter and the locale in use. Using the default formatter and default locale (`"C"`), the formatting uses QString::sprintf(). Supported specifiers are: `d, i, o, x, X, f, F, e, E, g, G, c`. See QString::sprintf() for additional details. For other locales, the default formatter uses reduced set of printf format specifiers: `d, i, f, F, e, E, g, G`. In these cases, the only supported modifier is the precision modifier for the floating point and exponential formats. The decimal point and other locale dependent formatting is done according to the graph locale.

Usage example:

`axis->setLabelFormat("%.2f mm");`

Access functions:

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

Notifier signal:

void | labelFormatChanged(const QString &format)

See also formatter and QAbstract3DGraph::locale.

### reversed : bool

If `true`, the axis will be rendered in reverse, i.e. the positions of minimum and maximum values are swapped when the graph is rendered. This property doesn't affect the actual minimum and maximum values of the axis.

This property was introduced in QtDataVisualization 1.1.

Access functions:

bool | reversed() const
void | setReversed(bool enable)

Notifier signal:

void | reversedChanged(bool enable)

### segmentCount : int

Defines the number of segments on the axis. This indicates how many labels are drawn. The number of grid lines to be drawn is calculated with formula: `segments * subsegments + 1`. The preset default is `5`, and it can not be below `1`.

Access functions:

int | segmentCount() const
void | setSegmentCount(int count)

Notifier signal:

void | segmentCountChanged(int count)

See also setSubSegmentCount().

### subSegmentCount : int

Defines the number of subsegments inside each segment on the axis. Grid lines are drawn between each subsegment, in addition to each segment. The preset default is `1`, and it can not be below `1`.

Access functions:

int | subSegmentCount() const
void | setSubSegmentCount(int count)

Notifier signal:

void | subSegmentCountChanged(int count)

See also setSegmentCount().

## Member Function Documentation

### QValue3DAxis::QValue3DAxis(QObject *parent = Q_NULLPTR)

Constructs QValue3DAxis with the given parent.

### `[virtual]` QValue3DAxis::~QValue3DAxis()

Destroys QValue3DAxis.