QValue3DAxis Class

The QValue3DAxis class manipulates an axis of a graph. 更多...

头：	#include <QValue3DAxis>
qmake:	QT += datavisualization
Since:	QtDataVisualization 1.0
实例化：	ValueAxis3D
继承：	QAbstract3DAxis

该类在 QtDataVisualization 1.0 引入。

• 所有成员列表，包括继承成员

特性

formatter : QValue3DAxisFormatter* labelFormat : QString reversed : bool

segmentCount : int subSegmentCount : int

公共函数

	QValue3DAxis (QObject * parent = 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

信号

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

详细描述

A value axis 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.

注意： 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.

特性文档编制

formatter : QValue3DAxisFormatter *

This property holds the axis formatter to be used.

Any existing formatter is deleted when a new formatter is set.

该特性在 QtDataVisualization 1.1 引入。

访问函数：

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

通知程序信号：

void	formatterChanged (QValue3DAxisFormatter * formatter )

labelFormat : QString

This property holds the label format to be used for the labels on this axis.

格式字符串支持的以下转换说明符、长度修饰符和标志的提供通过 printf() 在标准 C++ 库：d、i、o、x、X、f、F、e、E、g、G、c。

若 QAbstract3DGraph::locale is anything else than "C" ，支持的说明符限于：d、e、E、f、g、G 和 i。另外，仅支持精度修饰符。其余格式来自默认 QLocale 对于应用程序。

用法范例：

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

访问函数：

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

通知程序信号：

void	labelFormatChanged (const QString & format )

另请参阅 formatter and QAbstract3DGraph::locale .

reversed : bool

This property holds whether the axis is rendered in reverse.

若 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.

该特性在 QtDataVisualization 1.1 引入。

访问函数：

bool	reversed () const
void	setReversed (bool enable )

通知程序信号：

void	reversedChanged (bool enable )

segmentCount : int

This property holds 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 . The value cannot be below 1 .

访问函数：

int	segmentCount () const
void	setSegmentCount (int count )

通知程序信号：

void	segmentCountChanged (int count )

另请参阅 setSubSegmentCount ().

subSegmentCount : int

This property holds 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 . The value cannot be below 1 .

访问函数：

int	subSegmentCount () const
void	setSubSegmentCount (int count )

通知程序信号：

void	subSegmentCountChanged (int count )

另请参阅 setSegmentCount ().

成员函数文档编制

QValue3DAxis:: QValue3DAxis ( QObject * parent = nullptr)

Constructs QValue3DAxis with the given parent .

[虚拟] QValue3DAxis:: ~QValue3DAxis ()

销毁 QValue3DAxis .

内容

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