Scale Class Reference

#include <qwt3d_scale.h>

Inheritance diagram for Scale:

List of all members.

Protected Member Functions
virtual QString	ticLabel (unsigned int idx) const
virtual void	setLimits (double start, double stop)
virtual void	setMajors (int val)
virtual void	setMinors (int val)
virtual void	setMajorLimits (double start, double stop)
int	majors () const
int	minors () const
virtual Scale *	clone () const=0
virtual void	calculate ()=0
virtual int	autoscale (double &a, double &b, double start, double stop, int ivals)
Protected Attributes
std::vector< double >	majors_p
std::vector< double >	minors_p
double	start_p
double	stop_p
int	majorintervals_p
int	minorintervals_p
double	mstart_p
double	mstop_p

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Detailed Description

The class encapsulates non-visual scales. She 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 yet into the Axis interface. User-defined axes can be derived from Scale, LinearScale et al.

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Member Function Documentation

QString ticLabel

(

unsigned int

idx

)

const [protected, virtual]

The function maps the double value at tic-position idx to a final representation. 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.

Parameters:

idx

the current major tic index

Returns:

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

Reimplemented in LogScale.

void setLimits	(	double	start,
		double	stop
	)			[protected, virtual]

Sets start and stop value for the scale;.

virtual void setMajors

(

int

val

)

[inline, protected, virtual]

Sets number of major intervals.

virtual void setMinors

(

int

val

)

[inline, protected, virtual]

Sets number of minor intervals per major interval.

Reimplemented in LogScale.

void setMajorLimits	(	double	start,
		double	stop
	)			[protected, virtual]

Sets value of first major tic.

int majors

(

)

const [inline, protected]

Returns major intervals.

int minors

(

)

const [inline, protected]

Returns minor intervals.

virtual Scale* clone

(

)

const [protected, pure virtual]

Derived classes should return a new heap based object here.

Implemented in LinearScale, and LogScale.

virtual void calculate

(

)

[protected, pure virtual]

This function should setup the 2 vectors for major and minor positions;.

Implemented in LinearScale, and LogScale.

int autoscale	(	double &	a,
		double &	b,
		double	start,
		double	stop,
		int	ivals
	)			[protected, virtual]

Parameters:

	a	First major tic after applying autoscaling
	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 LinearScale.

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

• qwt3d_scale.h
• qwt3d_scale.cpp

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