Qwt3D::Scale Class Reference

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

#include <qwt3d_scale.h>

Inheritance diagram for Qwt3D::Scale:

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 Scale *	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 Scale &other)
	Copies Scale base state from another Scale.

Friends
class	Axis
	Indices used to identify an axis.
class	ClonePtr< Scale >

Detailed Description

Non-visual scale class encapsulating tic generation.

The class encapsulates non-visual scales. It is utilized by Axis and also collaborates closely with AutoScaler. A Scale 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 Axis interface. User-defined axes can be derived from Scale, LinearScale et al.

Member Function Documentation

autoscale()

int Scale::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 Qwt3D::LinearScale.

calculate()

virtual void Qwt3D::Scale::calculate ( )

protectedpure virtual

Implemented in Qwt3D::LinearScale, and Qwt3D::LogScale.

clone()

virtual Scale * Qwt3D::Scale::clone ( ) const

protectedpure virtual

Implemented in Qwt3D::LinearScale, and Qwt3D::LogScale.

copyFrom()

void Scale::copyFrom ( const Scale &  other )

protected

Copies Scale base state from another Scale.

Parameters

other

Source Scale to copy from

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

majors()

int Scale::majors ( ) const

protected

Returns major intervals.

Returns

Number of major intervals

majorTicks()

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

protected

Returns const reference to major tic positions.

Returns

Const reference to the vector of major tic positions

minors()

int Scale::minors ( ) const

protected

Returns minor intervals.

Returns

Number of minor intervals

minorTicks()

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

protected

Returns const reference to minor tic positions.

Returns

Const reference to the vector of minor tic positions

setLimits()

void Scale::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 Scale::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 Scale::setMajors ( int  val )

protectedvirtual

Sets number of major intervals.

Parameters

val	Number of major intervals

setMinors()

void Scale::setMinors ( int  val )

protectedvirtual

Sets number of minor intervals per major interval.

Parameters

val	Number of minor intervals

Reimplemented in Qwt3D::LogScale.

ticLabel()

QString Scale::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. LogScale::ticLabel.

Reimplemented in Qwt3D::LogScale.

Friends And Related Symbol Documentation

Axis

friend class Axis

friend

Indices used to identify an axis.

See also

Scale

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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