Qwt3DLogScale类 参考

Log10 scale 更多...

#include <qwt3d_scale.h>

类 Qwt3DLogScale 继承关系图:

Protected 成员函数
QString	ticLabel (unsigned int idx) const override
	Returns a power of 10 associated to the major value at index idx
void	setMinors (int val) override
	Sets the minor intervals for the logarithmic scale
	Qwt3DLogScale ()
	Default constructor - sets 9 minor intervals
Qwt3DScale *	clone () const override
	Returns a new heap based object utilized from Qwt3DClonePtr
void	calculate () override
	Creates major and minor vectors for the logarithmic scale
Protected 成员函数 继承自 Qwt3DScale
virtual void	setLimits (double start, double stop)
	Sets start and stop value for the scale
virtual void	setMajors (int val)
	Sets number of major intervals
virtual void	setMajorLimits (double start, double stop)
	Sets value of first and last major tic
int	majors () const
	Returns major intervals
int	minors () const
	Returns minor intervals
virtual int	autoscale (double &a, double &b, double start, double stop, int ivals)
	Autoscales the axis
const std::vector< double > &	majorTicks () const
	Returns const reference to major tic positions
const std::vector< double > &	minorTicks () const
	Returns const reference to minor tic positions
void	copyFrom (const Qwt3DScale &other)
	Copies Qwt3DScale base state from another Qwt3DScale

友元
class	Qwt3DAxis
class	Qwt3DClonePtr< Qwt3DScale >

详细描述

Log10 scale

成员函数说明

calculate()

void Qwt3DLogScale::calculate ( )

overrideprotectedvirtual

Creates major and minor vectors for the logarithmic scale

警告

If the interval is too small, the scale becomes empty or will contain only a single major tic. There is no automatism (also not planned for now) for an 'intelligent' guess, what to do. Better switch manually to linear scales in such cases.

实现了 Qwt3DScale.

clone()

Qwt3DScale * Qwt3DLogScale::clone ( ) const

overrideprotectedvirtual

Returns a new heap based object utilized from Qwt3DClonePtr

返回

A new Qwt3DLogScale copy

实现了 Qwt3DScale.

setMinors()

void Qwt3DLogScale::setMinors ( int  val )

overrideprotectedvirtual

Sets the minor intervals for the logarithmic scale

参数

val	Number of minor intervals (only 9, 5, 3, or 2 are accepted)

They will produce mantissa sets of {2,3,4,5,6,7,8,9}, {2,4,6,8}, {2,5} or {5} respectively.

重载 Qwt3DScale .

ticLabel()

QString Qwt3DLogScale::ticLabel ( unsigned int  idx ) const

overrideprotectedvirtual

Returns a power of 10 associated to the major value at index idx

参数

idx	The current major tic index

返回

The QString representation of 10^value for valid index, empty QString else

重载 Qwt3DScale .

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该类的文档由以下文件生成:

• /home/runner/work/QWT/QWT/src/plot3d/qwt3d_scale.h
• /home/runner/work/QWT/QWT/src/plot3d/qwt3d_scale.cpp