内容

• 公共类型
• 特性
• 公共函数
• 信号
• 详细描述

QBoxSet Class

The QBoxSet class represents one item in a box-and-whiskers chart. 更多...

头：	#include <QBoxSet>
实例化：	BoxSet
继承：	QObject

• 所有成员列表，包括继承成员

公共类型

enum	ValuePositions { LowerExtreme, LowerQuartile, Median, UpperQuartile, UpperExtreme }

特性

• brush : QBrush
• pen : QPen

• 1 特性继承自 QObject

公共函数

	QBoxSet (const QString label = QString(), QObject * parent = Q_NULLPTR)
	QBoxSet (const qreal le , const qreal lq , const qreal m , const qreal uq , const qreal ue , const QString label = QString(), QObject * parent = Q_NULLPTR)
virtual	~QBoxSet ()
void	append (const qreal value )
void	append (const QList<qreal> & 值 )
qreal	at (const int index ) const
QBrush	brush () const
void	clear ()
int	count () const
QString	label () const
QPen	pen () const
void	setBrush (const QBrush & brush )
void	setLabel (const QString label )
void	setPen (const QPen & pen )
void	setValue (const int index , const qreal value )
QBoxSet &	operator<< (const qreal & value )
qreal	operator[] (const int index ) const

• 32 公共函数继承自 QObject

信号

void	brushChanged ()
void	cleared ()
void	clicked ()
void	doubleClicked ()
void	hovered (bool status )
void	penChanged ()
void	pressed ()
void	released ()
void	valueChanged (int index )
void	valuesChanged ()

• 2 信号继承自 QObject

额外继承成员

• 1 公共槽继承自 QObject
• 11 静态公共成员继承自 QObject
• 9 保护函数继承自 QObject

详细描述

The QBoxSet class represents one item in a box-and-whiskers chart.

A box-and-whiskers item is a graphical representation of a range and three median values that is constructed from five different values. There are two ways to specify the values. The first one is by using a constructor or stream operator (<<). The values have to be specified in the following order: lower extreme, lower quartile, median, upper quartile, and upper extreme.

The second way is to create an empty QBoxSet instance and specify the values using the setValue () 方法。

见 box-and-whiskers chart example to learn how to create a box-and-whiskers chart.

另请参阅 QBoxPlotSeries .

成员类型文档编制

enum QBoxSet:: ValuePositions

This enum type defines the values of a box-and-whiskers item:

常量	值	描述
QBoxSet::LowerExtreme	0	The smallest value of the box-and-whiskers item.
QBoxSet::LowerQuartile	1	The median value of the lower half of the box-and-whiskers item.
QBoxSet::Median	2	The median value of the box-and-whiskers item.
QBoxSet::UpperQuartile	3	The median value of the upper half of the box-and-whiskers item.
QBoxSet::UpperExtreme	4	The largest value of the box-and-whiskers item.

特性文档编制

brush : QBrush

This property holds the brush used fill the box of the box-and-whiskers item.

访问函数：

QBrush	brush () const
void	setBrush (const QBrush & brush )

通知程序信号：

void	brushChanged ()

pen : QPen

This property holds the pen used to draw the lines of the box-and-whiskers item.

访问函数：

QPen	pen () const
void	setPen (const QPen & pen )

通知程序信号：

void	penChanged ()

成员函数文档编制

QBoxSet:: QBoxSet (const QString label = QString(), QObject * parent = Q_NULLPTR)

Constructs a box-and-whiskers item with the optional label label 和父级 parent .

QBoxSet:: QBoxSet (const qreal le , const qreal lq , const qreal m , const qreal uq , const qreal ue , const QString label = QString(), QObject * parent = Q_NULLPTR)

Constructs a box-and-whiskers item with the following ordered values: le specifies the lower extreme, lq the lower quartile, m the median, uq the upper quartile, and ue the upper quartile. Optionally, the label and parent can be specified.

[虚拟] QBoxSet:: ~QBoxSet ()

Destroys the a box-and-whiskers item.

void QBoxSet:: append (const qreal value )

Appends the new value specified by value to the end of the box-and-whiskers item.

void QBoxSet:: append (const QList < qreal > & 值 )

Appends a list of real values specified by 值 to the end of the box-and-whiskers item.

另请参阅 append ().

qreal QBoxSet:: at (const int index ) const

Returns the value of the box-and-whiskers item specified by index . The index can be specified by using ValuePositions enumeration values. If the index is out of bounds, 0.0 is returned.

QBrush QBoxSet:: brush () const

Returns the brush used to fill the box-and-whiskers item.

注意： Getter 函数对于特性 brush .

另请参阅 setBrush ().

[signal] void QBoxSet:: brushChanged ()

This signal is emitted when the brush of the box-and-whiskers item changes.

注意： 通知程序信号对于特性 brush .

另请参阅 brush .

void QBoxSet:: clear ()

Sets all the values of the box-and-whiskers item to 0.

[signal] void QBoxSet:: cleared ()

This signal is emitted when all the values of the box-and-whiskers item are set to 0.

[signal] void QBoxSet:: clicked ()

This signal is emitted when the user clicks a box-and-whiskers item in the chart.

int QBoxSet:: count () const

Returns the number of values appended to the box-and-whiskers item.

[signal] void QBoxSet:: doubleClicked ()

This signal is emitted when the user double-clicks a box-and-whiskers item.

[signal] void QBoxSet:: hovered ( bool status )

This signal is emitted when a mouse is hovered over a box-and-whiskers item in a chart. When the mouse moves over the item, status turns true , and when the mouse moves away again, it turns false .

QString QBoxSet:: label () const

Returns the label of the category of the box-and-whiskers item.

另请参阅 setLabel ().

QPen QBoxSet:: pen () const

Returns the pen used to draw the box-and-whiskers item.

注意： Getter 函数对于特性 pen .

另请参阅 setPen ().

[signal] void QBoxSet:: penChanged ()

This signal is emitted when the pen of the box-and-whiskers item changes.

注意： 通知程序信号对于特性 pen .

另请参阅 pen .

[signal] void QBoxSet:: pressed ()

This signal is emitted when the user clicks a box-and-whiskers item in the chart and holds down the mouse button.

[signal] void QBoxSet:: released ()

This signal is emitted when the user releases the mouse press on a box-and-whiskers item.

void QBoxSet:: setBrush (const QBrush & brush )

Sets the brush used to fill the box-and-whiskers item to brush .

注意： Setter 函数对于特性 brush .

另请参阅 brush ().

void QBoxSet:: setLabel (const QString label )

Sets the label specified by label for the category of the box-and-whiskers item.

另请参阅 label ().

void QBoxSet:: setPen (const QPen & pen )

Sets the pen used to draw the box-and-whiskers item to pen .

注意： Setter 函数对于特性 pen .

另请参阅 pen ().

void QBoxSet:: setValue (const int index , const qreal value )

Sets the value specified by value in the position specified by index . The index can be specified by using the ValuePositions enumeration values.

[signal] void QBoxSet:: valueChanged ( int index )

This signal is emitted when the value of the box-and-whiskers item specified by index 被修改。

另请参阅 at ().

[signal] void QBoxSet:: valuesChanged ()

This signal is emitted when multiple values of the box-and-whiskers item change.

另请参阅 append ().

QBoxSet &QBoxSet:: operator<< (const qreal & value )

A convenience operator for appending the real value specified by value to the end of the box-and-whiskers item.

另请参阅 append ().

qreal QBoxSet:: operator[] (const int index ) const

Returns the value of the box-and-whiskers item specified by index . The index can be specified by using ValuePositions enumeration values. If the index is out of bounds, 0.0 is returned.