用于绘制日期时间刻度的类更多...

#include <qwt_date_scale_draw.h>

类 QwtDateScaleDraw 继承关系图:

类
class	PrivateData

Public 成员函数
	QwtDateScaleDraw (Qt::TimeSpec timeSpec=Qt::LocalTime)
	Constructor with time specification

virtual	~QwtDateScaleDraw ()
	Destructor

void	setDateFormat (QwtDate::IntervalType, const QString &)
	Set the default format string for a datetime interval type

QString	dateFormat (QwtDate::IntervalType) const
	Get the default format string for a datetime interval type

void	setTimeSpec (Qt::TimeSpec)
	Set the time specification used for the tick labels

Qt::TimeSpec	timeSpec () const
	Get the time specification used for the tick labels

void	setUtcOffset (int seconds)
	Set the offset in seconds from Coordinated Universal Time

int	utcOffset () const
	Get the offset in seconds from Coordinated Universal Time

void	setWeek0Type (QwtDate::Week0Type)
	Set how to identify the first week of a year

QwtDate::Week0Type	week0Type () const
	Get how to identify the first week of a year

virtual QwtText	label (double) const override
	Convert a value into its representing label

QDateTime	toDateTime (double) const
	Translate a double value into a QDateTime object

Public 成员函数继承自 QwtScaleDraw
	QwtScaleDraw ()
	构造函数

virtual	~QwtScaleDraw ()
	Destructor

void	getBorderDistHint (const QFont &, int &start, int &end) const
	Get the border distance hint

int	minLabelDist (const QFont &) const
	Get the minimum label distance

int	minLength (const QFont &) const
	Get the minimum length

virtual double	extent (const QFont &) const override
	计算垂直/水平刻度所需的宽度/高度

void	move (double x, double y)
	移动刻度的位置

void	move (const QPointF &)
	移动刻度的位置

void	setLength (double length)
	设置主干的长度

Alignment	alignment () const
	返回刻度的对齐方式

void	setAlignment (Alignment)
	Set the alignment

Qt::Orientation	orientation () const
	返回方向

QPointF	pos () const
	获取刻度的原点

double	length () const
	获取主干的长度

void	setLabelAlignment (Qt::Alignment)
	Set the label alignment

Qt::Alignment	labelAlignment () const
	获取标签标志

void	setLabelRotation (double rotation)
	Set the label rotation

double	labelRotation () const
	获取标签旋转角度

int	maxLabelHeight (const QFont &) const
	Get the maximum label height

int	maxLabelWidth (const QFont &) const
	Get the maximum label width

QPointF	labelPosition (double value) const
	Get the label position for a value

QRectF	labelRect (const QFont &, double value) const
	Get the label rectangle for a value

QSizeF	labelSize (const QFont &, double value) const
	Get the label size for a value

QRect	boundingLabelRect (const QFont &, double value) const
	Get the bounding label rectangle

Public 成员函数继承自 QwtAbstractScaleDraw
	QwtAbstractScaleDraw ()
	QwtAbstractScaleDraw 构造函数

virtual	~QwtAbstractScaleDraw ()
	QwtAbstractScaleDraw 析构函数

void	setScaleDiv (const QwtScaleDiv &)
	设置刻度划分

const QwtScaleDiv &	scaleDiv () const
	返回刻度划分

void	setTransformation (QwtTransform *)
	设置刻度变换

const QwtScaleMap &	scaleMap () const
	返回刻度映射（常量版本）

QwtScaleMap &	scaleMap ()
	返回刻度映射（非常量版本）

void	enableComponent (ScaleComponent, bool enable=true)
	启用或禁用刻度组件

bool	hasComponent (ScaleComponent) const
	检查组件是否已启用

void	setTickLength (QwtScaleDiv::TickType, double length)
	设置刻度线长度

double	tickLength (QwtScaleDiv::TickType) const
	获取刻度线长度

double	maxTickLength () const
	获取最长刻度线的长度

void	setSpacing (double)
	设置刻度线和标签之间的间距

double	spacing () const
	获取间距

void	setPenWidthF (qreal width)
	设置刻度画笔宽度

qreal	penWidthF () const
	获取刻度画笔宽度

void	setSelected (bool on)
	设置刻度绘制是否被选中

bool	isSelected () const
	检查刻度绘制是否被选中

void	setSelectedPenWidthOffset (qreal offset=1)
	设置坐标轴在选中状态下的画笔宽度附加值

qreal	selectedPenWidthOffset () const
	获取当前坐标轴在选中状态下的画笔宽度附加值

virtual void	draw (QPainter *, const QPalette &) const
	绘制刻度

void	setMinimumExtent (double)
	设置范围的最小值

double	minimumExtent () const
	获取最小范围

void	invalidateCache ()
	清除 tickLabel() 使用的缓存

Protected 成员函数
virtual QwtDate::IntervalType	intervalType (const QwtScaleDiv &) const
	Find the less detailed datetime unit, where no rounding errors happen.

virtual QString	dateFormatOfDate (const QDateTime &, QwtDate::IntervalType) const
	Format string for the representation of a datetime

Protected 成员函数继承自 QwtScaleDraw
QTransform	labelTransformation (const QPointF &, const QSizeF &) const
	计算绘制标签所需的变换

virtual void	drawTick (QPainter *, double value, double len) const override
	绘制刻度线

virtual void	drawBackbone (QPainter *) const override
	绘制刻度的基线

virtual void	drawLabel (QPainter *, double value) const override
	绘制主刻度标签

Protected 成员函数继承自 QwtAbstractScaleDraw
const QwtText &	tickLabel (const QFont &, double value) const
	将值转换为表示标签并缓存

额外继承的成员函数
Public 类型继承自 QwtScaleDraw
enum	Alignment { BottomScale , TopScale , LeftScale , RightScale }
	刻度绘制的对齐方式更多...

Public 类型继承自 QwtAbstractScaleDraw
enum	ScaleComponent { Backbone = 0x01 , Ticks = 0x02 , Labels = 0x04 }
	刻度的组件更多...

详细描述

用于绘制日期时间刻度的类

构造及析构函数说明

◆ QwtDateScaleDraw()

QwtDateScaleDraw::QwtDateScaleDraw ( Qt::TimeSpec timeSpec = Qt::LocalTime )

explicit

Constructor with time specification

构造函数

◆ ~QwtDateScaleDraw()

QwtDateScaleDraw::~QwtDateScaleDraw ( )

virtual

Destructor

析构函数

成员函数说明

◆ dateFormat()

QString QwtDateScaleDraw::dateFormat ( QwtDate::IntervalType intervalType ) const

Get the default format string for a datetime interval type

获取日期时间间隔类型的默认格式字符串

◆ dateFormatOfDate()

QString QwtDateScaleDraw::dateFormatOfDate	(	const QDateTime &	dateTime,
		QwtDate::IntervalType	intervalType
	)		const

protectedvirtual

Format string for the representation of a datetime

dateFormatOfDate() is intended to be overloaded for situations, where formats are individual for specific datetime values.

The default setting ignores dateTime and return the default format for the interval type.

参数

dateTime	Datetime value
intervalType	Interval type

返回: Format string

参见: setDateFormat(), QwtDate::toString()

◆ intervalType()

QwtDate::IntervalType QwtDateScaleDraw::intervalType ( const QwtScaleDiv & scaleDiv ) const

protectedvirtual

Find the less detailed datetime unit, where no rounding errors happen.

参数

scaleDiv Scale division

返回: Interval type

参见: dateFormatOfDate()

◆ label()

QwtText QwtDateScaleDraw::label ( double value ) const

overridevirtual

Convert a value into its representing label

将值转换为其表示的标签

重载 QwtAbstractScaleDraw .

◆ setDateFormat()

void QwtDateScaleDraw::setDateFormat	(	QwtDate::IntervalType	intervalType,
		const QString &	format
	)

Set the default format string for a datetime interval type

设置日期时间间隔类型的默认格式字符串

◆ setTimeSpec()

void QwtDateScaleDraw::setTimeSpec ( Qt::TimeSpec timeSpec )

Set the time specification used for the tick labels

设置用于刻度标签的时间规范

◆ setUtcOffset()

void QwtDateScaleDraw::setUtcOffset ( int seconds )

Set the offset in seconds from Coordinated Universal Time

设置与世界协调时间的偏移量（秒）

◆ setWeek0Type()

void QwtDateScaleDraw::setWeek0Type ( QwtDate::Week0Type week0Type )

Set how to identify the first week of a year

设置如何确定一年的第一周

◆ timeSpec()

Qt::TimeSpec QwtDateScaleDraw::timeSpec ( ) const

Get the time specification used for the tick labels

获取用于刻度标签的时间规范

◆ toDateTime()

QDateTime QwtDateScaleDraw::toDateTime ( double value ) const

Translate a double value into a QDateTime object

将 double 值转换为 QDateTime 对象

◆ utcOffset()

int QwtDateScaleDraw::utcOffset ( ) const

Get the offset in seconds from Coordinated Universal Time

获取与世界协调时间的偏移量（秒）

◆ week0Type()

QwtDate::Week0Type QwtDateScaleDraw::week0Type ( ) const

Get how to identify the first week of a year

获取如何确定一年的第一周

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_date_scale_draw.h
/home/runner/work/QWT/QWT/src/plot/qwt_date_scale_draw.cpp

类

Public 成员函数

Protected 成员函数

额外继承的成员函数