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/*
* python-qwt. Python wrapper for the Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
* Copyright (C) 2015 Gudjon I. Gudjonsson
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
/*class QwtScaleArithmetic
{
public:
static double ceilEps( double value, double intervalSize );
static double floorEps( double value, double intervalSize );
static double divideEps( double interval, double steps );
static double divideInterval( double interval,
int numSteps, uint base );
};*/
class QwtScaleEngine
{
%TypeHeaderCode
#include <qwt_scale_engine.h>
%End
public:
enum Attribute
{
//! No attributes
NoAttribute = 0x00,
//! Build a scale which includes the reference() value.
IncludeReference = 0x01,
//! Build a scale which is symmetric to the reference() value.
Symmetric = 0x02,
/*!
The endpoints of the scale are supposed to be equal the
outmost included values plus the specified margins
(see setMargins()).
If this attribute is *not* set, the endpoints of the scale will
be integer multiples of the step size.
*/
Floating = 0x04,
//! Turn the scale upside down.
Inverted = 0x08
};
//! Layout attributes
//typedef QFlags<Attribute> Attributes;
explicit QwtScaleEngine( uint base = 10 );
virtual ~QwtScaleEngine();
void setBase( uint base );
uint base() const;
void setAttribute( Attribute, bool on = true );
bool testAttribute( Attribute ) const;
//void setAttributes( Attributes );
//Attributes attributes() const;
void setReference( double reference );
double reference() const;
void setMargins( double lower, double upper );
double lowerMargin() const;
double upperMargin() const;
/*!
Align and divide an interval
\param maxNumSteps Max. number of steps
\param x1 First limit of the interval (In/Out)
\param x2 Second limit of the interval (In/Out)
\param stepSize Step size (Return value)
*/
virtual void autoScale( int maxNumSteps,
double &x1, double &x2, double &stepSize ) const = 0;
/*!
\brief Calculate a scale division
\param x1 First interval limit
\param x2 Second interval limit
\param maxMajorSteps Maximum for the number of major steps
\param maxMinorSteps Maximum number of minor steps
\param stepSize Step size. If stepSize == 0.0, the scaleEngine
calculates one.
\return Calculated scale division
*/
virtual QwtScaleDiv divideScale( double x1, double x2,
int maxMajorSteps, int maxMinorSteps,
double stepSize = 0.0 ) const = 0;
void setTransformation( QwtTransform * /Transfer/);
QwtTransform *transformation() const;
protected:
bool contains( const QwtInterval &, double val ) const;
QList<double> strip( const QList<double>&, const QwtInterval & ) const;
double divideInterval( double interval, int numSteps ) const;
QwtInterval buildInterval( double v ) const;
/*private:
class PrivateData;
PrivateData *d_data;*/
};
/*!
\brief A scale engine for linear scales
The step size will fit into the pattern
\f$\left\{ 1,2,5\right\} \cdot 10^{n}\f$, where n is an integer.
*/
class QwtLinearScaleEngine: public QwtScaleEngine
{
%TypeHeaderCode
#include <qwt_scale_engine.h>
%End
public:
QwtLinearScaleEngine( uint base = 10 );
virtual ~QwtLinearScaleEngine();
virtual void autoScale( int maxSteps,
double &x1, double &x2, double &stepSize ) const;
virtual QwtScaleDiv divideScale( double x1, double x2,
int numMajorSteps, int numMinorSteps,
double stepSize = 0.0 ) const;
protected:
QwtInterval align( const QwtInterval&, double stepSize ) const;
/*void buildTicks(
const QwtInterval &, double stepSize, int maxMinSteps,
QList<double> ticks[QwtScaleDiv::NTickTypes] ) const;*/
QList<double> buildMajorTicks(
const QwtInterval &interval, double stepSize ) const;
void buildMinorTicks( const QList<double>& majorTicks,
int maxMinorSteps, double stepSize,
QList<double> &minorTicks, QList<double> &mediumTicks ) const;
};
/*!
\brief A scale engine for logarithmic scales
The step size is measured in *decades*
and the major step size will be adjusted to fit the pattern
\f$\left\{ 1,2,3,5\right\} \cdot 10^{n}\f$, where n is a natural number
including zero.
\warning the step size as well as the margins are measured in *decades*.
*/
class QwtLogScaleEngine: public QwtScaleEngine
{
%TypeHeaderCode
#include <qwt_scale_engine.h>
%End
public:
QwtLogScaleEngine( uint base = 10 );
virtual ~QwtLogScaleEngine();
virtual void autoScale( int maxSteps,
double &x1, double &x2, double &stepSize ) const;
virtual QwtScaleDiv divideScale( double x1, double x2,
int numMajorSteps, int numMinorSteps,
double stepSize = 0.0 ) const;
protected:
QwtInterval align( const QwtInterval&, double stepSize ) const;
/*void buildTicks(
const QwtInterval &, double stepSize, int maxMinSteps,
QList<double> ticks[QwtScaleDiv::NTickTypes] ) const;*/
QList<double> buildMajorTicks(
const QwtInterval &interval, double stepSize ) const;
void buildMinorTicks( const QList<double>& majorTicks,
int maxMinorSteps, double stepSize,
QList<double> &minorTicks, QList<double> &mediumTicks ) const;
};
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