Qwt3DScale Class Reference

Non-visual scale class encapsulating tic generation. More...

#include <qwt3d_scale.h>

Inheritance diagram for Qwt3DScale:

Classes
class	PrivateData

Protected Member Functions
virtual QString	ticLabel (unsigned int idx) const
	Maps the double value at tic-position idx to a final representation.
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	setMinors (int val)
	Sets number of minor intervals per major interval.
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 Qwt3DScale *	clone () const =0
virtual void	calculate ()=0
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.

Friends
class	Qwt3DAxis
class	Qwt3DClonePtr< Qwt3DScale >

Detailed Description

Non-visual scale class encapsulating tic generation.

The class encapsulates non-visual scales. It is utilized by Qwt3DAxis and also collaborates closely with Qwt3DAutoScaler. A Qwt3DScale allows control over all aspects of tic generation including arbitrary transformations of tic values into corresponding strings. The strings contain what eventually will be shown as tic labels. Standard linear and logarithmic scales have been integrated into the Qwt3DAxis interface. User-defined axes can be derived from Qwt3DScale, Qwt3DLinearScale et al.

Member Function Documentation

autoscale()

int Qwt3DScale::autoscale ( double &  a, double &  b, double  start, double  stop, int  ivals  )

protectedvirtual

Autoscales the axis.

Parameters

[out]	a	First major tic after applying autoscaling
[out]	b	Last major tic after applying autoscaling
	start	Scale begin
	stop	Scale end
	ivals	Requested number of major intervals

Returns

Number of major intervals after autoscaling

The default implementation sets a=start, b=stop and returns ivals.

Reimplemented in Qwt3DLinearScale.

calculate()

virtual void Qwt3DScale::calculate ( )

protectedpure virtual

Implemented in Qwt3DLinearScale, and Qwt3DLogScale.

clone()

virtual Qwt3DScale * Qwt3DScale::clone ( ) const

protectedpure virtual

Implemented in Qwt3DLinearScale, and Qwt3DLogScale.

copyFrom()

void Qwt3DScale::copyFrom ( const Qwt3DScale &  other )

protected

Copies Qwt3DScale base state from another Qwt3DScale.

Parameters

other

Source Qwt3DScale to copy from

Used by derived class clone() implementations to copy the Qwt3DScale base data without requiring a copy constructor.

majors()

int Qwt3DScale::majors ( ) const

protected

Returns major intervals.

Returns

Number of major intervals

majorTicks()

const std::vector< double > & Qwt3DScale::majorTicks ( ) const

protected

Returns const reference to major tic positions.

Returns

Const reference to the vector of major tic positions

minors()

int Qwt3DScale::minors ( ) const

protected

Returns minor intervals.

Returns

Number of minor intervals

minorTicks()

const std::vector< double > & Qwt3DScale::minorTicks ( ) const

protected

Returns const reference to minor tic positions.

Returns

Const reference to the vector of minor tic positions

setLimits()

void Qwt3DScale::setLimits ( double  start, double  stop  )

protectedvirtual

Sets start and stop value for the scale.

Parameters

start	Scale start value
stop	Scale stop value

setMajorLimits()

void Qwt3DScale::setMajorLimits ( double  start, double  stop  )

protectedvirtual

Sets value of first and last major tic.

Parameters

start	First major tic value
stop	Last major tic value

setMajors()

void Qwt3DScale::setMajors ( int  val )

protectedvirtual

Sets number of major intervals.

Parameters

val	Number of major intervals

setMinors()

void Qwt3DScale::setMinors ( int  val )

protectedvirtual

Sets number of minor intervals per major interval.

Parameters

val	Number of minor intervals

Reimplemented in Qwt3DLogScale.

ticLabel()

QString Qwt3DScale::ticLabel ( unsigned int  idx ) const

protectedvirtual

Maps the double value at tic-position idx to a final representation.

Parameters

idx	The current major tic index

Returns

The QString representation for the value corresponding to a valid index, an empty QString else.

The default return value is simply the tic values QString representation. Overwrite this function, if you plan to transform the value in some way. See e.g. Qwt3DLogScale::ticLabel.

Reimplemented in Qwt3DLogScale.

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The documentation for this class was generated from the following files:

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