QCPAxisTickerFixed Class Reference

Inheritance diagram for QCPAxisTickerFixed:

Public Types
enum	ScaleStrategy { ssNone , ssMultiples , ssPowers }
Public Types inherited from QCPAxisTicker
enum	TickStepStrategy { tssReadability , tssMeetTickCount }

Public Member Functions
	QCPAxisTickerFixed ()
ScaleStrategy	scaleStrategy () const
void	setScaleStrategy (ScaleStrategy strategy)
void	setTickStep (double step)
double	tickStep () const
Public Member Functions inherited from QCPAxisTicker
	QCPAxisTicker ()
virtual void	generate (const QCPRange &range, const QLocale &locale, QChar formatChar, int precision, QVector< double > &ticks, QVector< double > *subTicks, QVector< QString > *tickLabels)
void	setTickCount (int count)
void	setTickOrigin (double origin)
void	setTickStepStrategy (TickStepStrategy strategy)
int	tickCount () const
double	tickOrigin () const
TickStepStrategy	tickStepStrategy () const

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

Protected Attributes
ScaleStrategy	mScaleStrategy
double	mTickStep
Protected Attributes inherited from QCPAxisTicker
int	mTickCount
double	mTickOrigin
TickStepStrategy	mTickStepStrategy

Detailed Description

Specialized axis ticker with a fixed tick step.

This QCPAxisTicker subclass generates ticks with a fixed tick step set with setTickStep. It is also possible to allow integer multiples and integer powers of the specified tick step with setScaleStrategy.

A typical application of this ticker is to make an axis only display integers, by setting the tick step of the ticker to 1.0 and the scale strategy to ssMultiples.

Another case is when a certain number has a special meaning and axis ticks should only appear at multiples of that value. In this case you might also want to consider QCPAxisTickerPi because despite the name it is not limited to only pi symbols/values.

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

Definition at line 1898 of file qcustomplot.h.

Member Enumeration Documentation

ScaleStrategy

enum QCPAxisTickerFixed::ScaleStrategy

Defines how the axis ticker may modify the specified tick step (setTickStep) in order to control the number of ticks in the axis range.

See also

setScaleStrategy

Enumerator
ssNone	Modifications are not allowed, the specified tick step is absolutely fixed. This might cause a high tick density and overlapping labels if the axis range is zoomed out.
ssMultiples	An integer multiple of the specified tick step is allowed. The used factor follows the base class properties of setTickStepStrategy and setTickCount.
ssPowers	An integer power of the specified tick step is allowed.

Definition at line 1908 of file qcustomplot.h.

Constructor & Destructor Documentation

QCPAxisTickerFixed()

QCPAxisTickerFixed::QCPAxisTickerFixed

(

)

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.

Definition at line 7116 of file qcustomplot.cpp.

Member Function Documentation

getTickStep()

double QCPAxisTickerFixed::getTickStep ( const QCPRange & range )

overrideprotectedvirtual

Determines the actually used tick step from the specified tick step and scale strategy (setTickStep, setScaleStrategy).

This method either returns the specified tick step exactly, or, if the scale strategy is not ssNone, a modification of it to allow varying the number of ticks in the current axis range.

\seebaseclassmethod

Reimplemented from QCPAxisTicker.

Definition at line 7161 of file qcustomplot.cpp.

scaleStrategy()

ScaleStrategy QCPAxisTickerFixed::scaleStrategy ( ) const

inline

Definition at line 1918 of file qcustomplot.h.

setScaleStrategy()

void QCPAxisTickerFixed::setScaleStrategy

(

QCPAxisTickerFixed::ScaleStrategy

strategy

)

Sets whether the specified tick step (setTickStep) is absolutely fixed or whether modifications may be applied to it before calculating the finally used tick step, such as permitting multiples or powers. See ScaleStrategy for details.

The default strategy is ssNone, which means the tick step is absolutely fixed.

Definition at line 7146 of file qcustomplot.cpp.

setTickStep()

void QCPAxisTickerFixed::setTickStep

(

double

step

)

Sets the fixed tick interval to step.

The axis ticker will only use this tick step when generating axis ticks. This might cause a very high tick density and overlapping labels if the axis range is zoomed out. Using setScaleStrategy it is possible to relax the fixed step and also allow multiples or powers of step. This will enable the ticker to reduce the number of ticks to a reasonable amount (see setTickCount).

Definition at line 7131 of file qcustomplot.cpp.

tickStep()

double QCPAxisTickerFixed::tickStep ( ) const

inline

Definition at line 1917 of file qcustomplot.h.

Member Data Documentation

mScaleStrategy

ScaleStrategy QCPAxisTickerFixed::mScaleStrategy

protected

Definition at line 1927 of file qcustomplot.h.

mTickStep

double QCPAxisTickerFixed::mTickStep

protected

Definition at line 1926 of file qcustomplot.h.

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

• qcustomplot.h
• qcustomplot.cpp