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QwtScaleDiv(3) Qwt User's Guide QwtScaleDiv(3)

NAME

QwtScaleDiv - A class representing a scale division.

SYNOPSIS

#include <qwt_scale_div.h>

Public Types


enum TickType { NoTick = -1, MinorTick, MediumTick, MajorTick, NTickTypes }
Scale tick types.

Public Member Functions


QwtScaleDiv (double lowerBound=0.0, double upperBound=0.0)
QwtScaleDiv (const QwtInterval &, QList< double >[NTickTypes])
QwtScaleDiv (double lowerBound, double upperBound, QList< double >[NTickTypes])
QwtScaleDiv (double lowerBound, double upperBound, const QList< double > &minorTicks, const QList< double > &mediumTicks, const QList< double > &majorTicks)
bool operator== (const QwtScaleDiv &) const
Equality operator. bool operator!= (const QwtScaleDiv &) const
Inequality. void setInterval (double lowerBound, double upperBound)
void setInterval (const QwtInterval &)
QwtInterval interval () const
void setLowerBound (double)
double lowerBound () const
void setUpperBound (double)
double upperBound () const
double range () const
bool contains (double value) const
void setTicks (int tickType, const QList< double > &)
QList< double > ticks (int tickType) const
bool isEmpty () const
Check if the scale division is empty( lowerBound() == upperBound() ) bool isIncreasing () const
Check if the scale division is increasing( lowerBound() <= upperBound() ) void invert ()
QwtScaleDiv inverted () const
QwtScaleDiv bounded (double lowerBound, double upperBound) const

Detailed Description

A class representing a scale division.

A Qwt scale is defined by its boundaries and 3 list for the positions of the major, medium and minor ticks.

The upperBound() might be smaller than the lowerBound() to indicate inverted scales.

Scale divisions can be calculated from a QwtScaleEngine.

See also

QwtScaleEngine::divideScale(), QwtPlot::setAxisScaleDiv(), QwtAbstractSlider::setScaleDiv()

Definition at line 33 of file qwt_scale_div.h.

Member Enumeration Documentation

enum QwtScaleDiv::TickType

Scale tick types.

Enumerator

No ticks.
Minor ticks.
Medium ticks.
Major ticks.
Number of valid tick types.

Definition at line 37 of file qwt_scale_div.h.

Constructor & Destructor Documentation

QwtScaleDiv::QwtScaleDiv (double lowerBound = 0.0, double upperBound = 0.0) [explicit]

Construct a division without ticks

Parameters

lowerBound First boundary
upperBound Second boundary

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 21 of file qwt_scale_div.cpp.

QwtScaleDiv::QwtScaleDiv (const QwtInterval & interval, QList< double > ticks[NTickTypes]) [explicit]

Construct a scale division

Parameters

interval Interval
ticks List of major, medium and minor ticks

Definition at line 33 of file qwt_scale_div.cpp.

QwtScaleDiv::QwtScaleDiv (double lowerBound, double upperBound, QList< double > ticks[NTickTypes]) [explicit]

Construct a scale division

Parameters

lowerBound First boundary
upperBound Second boundary
ticks List of major, medium and minor ticks

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 51 of file qwt_scale_div.cpp.

QwtScaleDiv::QwtScaleDiv (double lowerBound, double upperBound, const QList< double > & minorTicks, const QList< double > & mediumTicks, const QList< double > & majorTicks) [explicit]

Construct a scale division

Parameters

lowerBound First boundary
upperBound Second boundary
minorTicks List of minor ticks
mediumTicks List medium ticks
majorTicks List of major ticks

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 71 of file qwt_scale_div.cpp.

Member Function Documentation

QwtScaleDiv QwtScaleDiv::bounded (double lowerBound, double upperBound) const

Return a scale division with an interval [lowerBound, upperBound] where all ticks outside this interval are removed

Parameters

lowerBound Lower bound
upperBound Upper bound

Returns

Scale division with all ticks inside of the given interval

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 263 of file qwt_scale_div.cpp.

bool QwtScaleDiv::contains (double value) const

Return if a value is between lowerBound() and upperBound()

Parameters

value Value

Returns

true/false

Definition at line 212 of file qwt_scale_div.cpp.

QwtInterval QwtScaleDiv::interval () const

Returns

lowerBound -> upperBound

Definition at line 111 of file qwt_scale_div.cpp.

void QwtScaleDiv::invert ()

Invert the scale division

See also

inverted()

Definition at line 224 of file qwt_scale_div.cpp.

QwtScaleDiv QwtScaleDiv::inverted () const

Returns

A scale division with inverted boundaries and ticks

See also

invert()

Definition at line 244 of file qwt_scale_div.cpp.

double QwtScaleDiv::lowerBound () const

Returns

First boundary

See also

upperBound()

Definition at line 131 of file qwt_scale_div.cpp.

bool QwtScaleDiv::operator!= (const QwtScaleDiv & other) const

Inequality.

Returns

true if this instance is not equal to other

Definition at line 189 of file qwt_scale_div.cpp.

bool QwtScaleDiv::operator== (const QwtScaleDiv & other) const

Equality operator.

Returns

true if this instance is equal to other

Definition at line 168 of file qwt_scale_div.cpp.

double QwtScaleDiv::range () const

Returns

upperBound() - lowerBound()

Definition at line 159 of file qwt_scale_div.cpp.

void QwtScaleDiv::setInterval (const QwtInterval & interval)

Change the interval

Parameters

interval Interval

Definition at line 102 of file qwt_scale_div.cpp.

void QwtScaleDiv::setInterval (double lowerBound, double upperBound)

Change the interval

Parameters

lowerBound First boundary
upperBound Second boundary

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 91 of file qwt_scale_div.cpp.

void QwtScaleDiv::setLowerBound (double lowerBound)

Set the first boundary

Parameters

lowerBound First boundary

See also

lowerBound(), setUpperBound()

Definition at line 122 of file qwt_scale_div.cpp.

void QwtScaleDiv::setTicks (int tickType, const QList< double > & ticks)

Assign ticks

Parameters

tickType MinorTick, MediumTick or MajorTick
ticks Values of the tick positions

Definition at line 297 of file qwt_scale_div.cpp.

void QwtScaleDiv::setUpperBound (double upperBound)

Set the second boundary

Parameters

upperBound Second boundary

See also

upperBound(), setLowerBound()

Definition at line 142 of file qwt_scale_div.cpp.

QList< double > QwtScaleDiv::ticks (int tickType) const

Return a list of ticks

Parameters

tickType MinorTick, MediumTick or MajorTick

Returns

Tick list

Definition at line 309 of file qwt_scale_div.cpp.

double QwtScaleDiv::upperBound () const

Returns

upper bound

See also

lowerBound()

Definition at line 151 of file qwt_scale_div.cpp.

Author

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Sun Jul 18 2021 Version 6.2.0