QDateTimeAxis 类

The QDateTimeAxis adds support for DateTime values to be added to a graph's axis. 更多...

头：	`#include <QDateTimeAxis>`
CMake:	`find_package(Qt6 REQUIRED COMPONENTS Graphs)` `target_link_libraries(mytarget PRIVATE Qt6::Graphs)`
qmake:	`QT += graphs`
在 QML：	DateTimeAxis
继承：	QAbstractAxis

所有成员列表，包括继承成员
QDateTimeAxis is part of Qt Graphs C++ Classes for 2D .

特性

labelFormat : QString
max : QDateTime
min : QDateTime

subTickCount : int
tickInterval : qreal

公共函数

QString	labelFormat () const
QDateTime	max () const
QDateTime	min () const
void	setLabelFormat (const QString & format )
void	setMax (const QDateTime & max )
void	setMin (const QDateTime & min )
void	setSubTickCount (int newSubTickCount )
void	setTickInterval (qreal newTickInterval )
int	subTickCount () const
qreal	tickInterval () const

信号

void	labelFormatChanged (const QString & format )
void	maxChanged (const QDateTime & max )
void	minChanged (const QDateTime & min )
void	subTickCountChanged ()
void	tickIntervalChanged ()

详细描述

A DateTime Axis can be used to display DateTime representations with tick marks and grid lines. The DateTime items on the axis are displayed at the position of the ticks.

特性文档编制

labelFormat : QString

This property holds the format of the DateTime labels on the axis. The format property allows to signify the visual representation of the DateTime object, in days, months, and years. The default value is dd-MMMM-yy.

访问函数：

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

通知程序信号：

void	labelFormatChanged (const QString & format )

max : QDateTime

This property holds the maximum value on the axis

This value can be lower or higher than the minimum. The DateTime is stored as UTC internally. The default value is new Date(1980,1,1)

访问函数：

QDateTime	max () const
void	setMax (const QDateTime & max )

通知程序信号：

void	maxChanged (const QDateTime & max )

min : QDateTime

This property holds the minimum value on the axis

This value can be lower or higher than the maximum. The DateTime is stored as UTC internally. The default value is new Date(1970,1,1)

访问函数：

QDateTime	min () const
void	setMin (const QDateTime & min )

通知程序信号：

void	minChanged (const QDateTime & min )

subTickCount : int

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

访问函数：

int	subTickCount () const
void	setSubTickCount (int newSubTickCount )

通知程序信号：

void	subTickCountChanged ()

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.

访问函数：

qreal	tickInterval () const
void	setTickInterval (qreal newTickInterval )

通知程序信号：

void	tickIntervalChanged ()