QCPAxisTickerPi Class Reference

Specialized axis ticker to display ticks in units of an arbitrary constant, for example pi. More...

Inheritance diagram for QCPAxisTickerPi:

Public Types
enum	FractionStyle { fsFloatingPoint , fsAsciiFractions , fsUnicodeFractions }
Public Types inherited from QCPAxisTicker
enum	TickStepStrategy { tssReadability , tssMeetTickCount }

Public Member Functions
	QCPAxisTickerPi ()
QString	piSymbol () const
double	piValue () const
bool	periodicity () const
FractionStyle	fractionStyle () const
void	setPiSymbol (QString symbol)
void	setPiValue (double pi)
void	setPeriodicity (int multiplesOfPi)
void	setFractionStyle (FractionStyle style)
Public Member Functions inherited from QCPAxisTicker
	QCPAxisTicker ()
TickStepStrategy	tickStepStrategy () const
int	tickCount () const
double	tickOrigin () const
void	setTickStepStrategy (TickStepStrategy strategy)
void	setTickCount (int count)
void	setTickOrigin (double origin)
virtual void	generate (const QCPRange &range, const QLocale &locale, QChar formatChar, int precision, QVector< double > &ticks, QVector< double > *subTicks, QVector< QString > *tickLabels)

Protected Member Functions
virtual double	getTickStep (const QCPRange &range) Q_DECL_OVERRIDE
virtual int	getSubTickCount (double tickStep) Q_DECL_OVERRIDE
virtual QString	getTickLabel (double tick, const QLocale &locale, QChar formatChar, int precision) Q_DECL_OVERRIDE
void	simplifyFraction (int &numerator, int &denominator) const
QString	fractionToString (int numerator, int denominator) const
QString	unicodeFraction (int numerator, int denominator) const
QString	unicodeSuperscript (int number) const
QString	unicodeSubscript (int number) const
Protected Member Functions inherited from QCPAxisTicker
virtual QVector< double >	createTickVector (double tickStep, const QCPRange &range)
virtual QVector< double >	createSubTickVector (int subTickCount, const QVector< double > &ticks)
virtual QVector< QString >	createLabelVector (const QVector< double > &ticks, const QLocale &locale, QChar formatChar, int precision)
void	trimTicks (const QCPRange &range, QVector< double > &ticks, bool keepOneOutlier) const
double	pickClosest (double target, const QVector< double > &candidates) const
double	getMantissa (double input, double *magnitude=nullptr) const
double	cleanMantissa (double input) const

Protected Attributes
QString	mPiSymbol
double	mPiValue
int	mPeriodicity
FractionStyle	mFractionStyle
double	mPiTickStep
Protected Attributes inherited from QCPAxisTicker
TickStepStrategy	mTickStepStrategy
int	mTickCount
double	mTickOrigin

Detailed Description

Specialized axis ticker to display ticks in units of an arbitrary constant, for example pi.

This QCPAxisTicker subclass generates ticks that are expressed with respect to a given symbolic constant with a numerical value specified with setPiValue and an appearance in the tick labels specified with setPiSymbol.

Ticks may be generated at fractions of the symbolic constant. How these fractions appear in the tick label can be configured with setFractionStyle.

The ticker can be created and assigned to an axis like this:

Member Enumeration Documentation

FractionStyle

enum QCPAxisTickerPi::FractionStyle

Defines how fractions should be displayed in tick labels.

See also

setFractionStyle

Enumerator
fsFloatingPoint	Fractions are displayed as regular decimal floating point numbers, e.g. "0.25" or "0.125".
fsAsciiFractions	Fractions are written as rationals using ASCII characters only, e.g. "1/4" or "1/8".
fsUnicodeFractions	Fractions are written using sub- and superscript UTF-8 digits and the fraction symbol.

Constructor & Destructor Documentation

QCPAxisTickerPi()

QCPAxisTickerPi::QCPAxisTickerPi

(

)

Constructs the ticker and sets reasonable default values. Axis tickers are commonly created managed by a QSharedPointer, which then can be passed to QCPAxis::setTicker.

Member Function Documentation

getSubTickCount()

int QCPAxisTickerPi::getSubTickCount ( double tickStep )

protectedvirtual

Reimplemented from QCPAxisTicker.

getTickLabel()

QString QCPAxisTickerPi::getTickLabel ( double tick, const QLocale & locale, QChar formatChar, int precision )

protectedvirtual

Reimplemented from QCPAxisTicker.

getTickStep()

double QCPAxisTickerPi::getTickStep ( const QCPRange & range )

protectedvirtual

Reimplemented from QCPAxisTicker.

setFractionStyle()

void QCPAxisTickerPi::setFractionStyle

(

QCPAxisTickerPi::FractionStyle

style

)

Sets how the numerical/fractional part preceding the symbolic constant is displayed in tick labels. See FractionStyle for the various options.

setPeriodicity()

void QCPAxisTickerPi::setPeriodicity

(

int

multiplesOfPi

)

Sets whether the axis labels shall appear periodicly and if so, at which multiplicity of the symbolic constant.

To disable periodicity, set multiplesOfPi to zero.

For example, an axis that identifies 0 with 2pi would set multiplesOfPi to two.

setPiSymbol()

void QCPAxisTickerPi::setPiSymbol

(

QString

symbol

)

Sets how the symbol part (which is always a suffix to the number) shall appear in the axis tick label.

If a space shall appear between the number and the symbol, make sure the space is contained in symbol.

setPiValue()

void QCPAxisTickerPi::setPiValue

(

double

pi

)

Sets the numerical value that the symbolic constant has.

This will be used to place the appropriate fractions of the symbol at the respective axis coordinates.

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

• app/NaFCSE/qcustomplot.h
• app/NaFCSE/qcustomplot.cpp