Classes | Public Member Functions | Protected Member Functions | Properties | Private Attributes | List of all members
QwtAbstractScale Class Reference

An abstract base class for widgets having a scale. More...

#include <qwt_abstract_scale.h>

Inheritance diagram for QwtAbstractScale:
Inheritance graph
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Classes

class  PrivateData
 

Public Member Functions

double invTransform (int) const
 
bool isInverted () const
 
double lowerBound () const
 
double maximum () const
 
double minimum () const
 
 QwtAbstractScale (QWidget *parent=NULL)
 
const QwtScaleDivscaleDiv () const
 
const QwtScaleEnginescaleEngine () const
 
QwtScaleEnginescaleEngine ()
 
const QwtScaleMapscaleMap () const
 
int scaleMaxMajor () const
 
int scaleMaxMinor () const
 
double scaleStepSize () const
 
void setLowerBound (double value)
 
void setScale (double lowerBound, double upperBound)
 Specify a scale. More...
 
void setScale (const QwtInterval &)
 Specify a scale. More...
 
void setScale (const QwtScaleDiv &)
 Specify a scale. More...
 
void setScaleEngine (QwtScaleEngine *)
 Set a scale engine. More...
 
void setScaleMaxMajor (int ticks)
 Set the maximum number of major tick intervals. More...
 
void setScaleMaxMinor (int ticks)
 Set the maximum number of minor tick intervals. More...
 
void setScaleStepSize (double stepSize)
 Set the step size used for calculating a scale division. More...
 
void setUpperBound (double value)
 
int transform (double) const
 
double upperBound () const
 
virtual ~QwtAbstractScale ()
 Destructor. More...
 

Protected Member Functions

const QwtAbstractScaleDrawabstractScaleDraw () const
 
QwtAbstractScaleDrawabstractScaleDraw ()
 
virtual void changeEvent (QEvent *)
 
void rescale (double lowerBound, double upperBound, double stepSize)
 
virtual void scaleChange ()
 Notify changed scale. More...
 
void setAbstractScaleDraw (QwtAbstractScaleDraw *)
 Set a scale draw. More...
 
void updateScaleDraw ()
 

Properties

double lowerBound
 
int scaleMaxMajor
 
int scaleMaxMinor
 
double scaleStepSize
 
double upperBound
 

Private Attributes

PrivateDatad_data
 

Detailed Description

An abstract base class for widgets having a scale.

The scale of an QwtAbstractScale is determined by a QwtScaleDiv definition, that contains the boundaries and the ticks of the scale. The scale is painted using a QwtScaleDraw object.

The scale division might be assigned explicitly - but usually it is calculated from the boundaries using a QwtScaleEngine.

The scale engine also decides the type of transformation of the scale ( linear, logarithmic ... ).

Definition at line 36 of file qwt_abstract_scale.h.

Constructor & Destructor Documentation

QwtAbstractScale::QwtAbstractScale ( QWidget *  parent = NULL)
explicit

Constructor

Parameters
parentParent widget

Creates a default QwtScaleDraw and a QwtLinearScaleEngine. The initial scale boundaries are set to [ 0.0, 100.0 ]

The scaleStepSize() is initialized to 0.0, scaleMaxMajor() to 5 and scaleMaxMajor to 3.

Definition at line 56 of file qwt_abstract_scale.cpp.

QwtAbstractScale::~QwtAbstractScale ( )
virtual

Destructor.

Definition at line 64 of file qwt_abstract_scale.cpp.

Member Function Documentation

const QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw ( ) const
protected
Returns
Scale draw
See also
setAbstractScaleDraw()

Definition at line 301 of file qwt_abstract_scale.cpp.

QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw ( )
protected
Returns
Scale draw
See also
setAbstractScaleDraw()

Definition at line 292 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::changeEvent ( QEvent *  event)
protectedvirtual

Change Event handler

Parameters
eventChange event

Invalidates internal caches if necessary

Reimplemented in QwtThermo, QwtKnob, QwtDial, and QwtSlider.

Definition at line 452 of file qwt_abstract_scale.cpp.

double QwtAbstractScale::invTransform ( int  value) const

Translate a widget coordinate into a scale value

Parameters
valueWidget coordinate
Returns
Corresponding scale coordinate for value
See also
scaleMap(), transform()

Definition at line 380 of file qwt_abstract_scale.cpp.

bool QwtAbstractScale::isInverted ( ) const
Returns
True, when the scale is increasing in opposite direction to the widget coordinates

Definition at line 389 of file qwt_abstract_scale.cpp.

double QwtAbstractScale::lowerBound ( ) const
double QwtAbstractScale::maximum ( ) const
Returns
The boundary with the larger value
See also
minimum(), lowerBound(), upperBound()

Definition at line 408 of file qwt_abstract_scale.cpp.

double QwtAbstractScale::minimum ( ) const
Returns
The boundary with the smaller value
See also
maximum(), lowerBound(), upperBound()

Definition at line 398 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::rescale ( double  lowerBound,
double  upperBound,
double  stepSize 
)
protected

Recalculate the scale division and update the scale.

Parameters
lowerBoundLower limit of the scale interval
upperBoundUpper limit of the scale interval
stepSizeMajor step size
See also
scaleChange()

Definition at line 428 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::scaleChange ( )
protectedvirtual

Notify changed scale.

Reimplemented in QwtThermo, QwtDial, QwtAbstractSlider, and QwtSlider.

Definition at line 415 of file qwt_abstract_scale.cpp.

const QwtScaleDiv & QwtAbstractScale::scaleDiv ( ) const
Returns
Scale boundaries and positions of the ticks

The scale division might have been assigned explicitly or calculated implicitly by rescale().

Definition at line 348 of file qwt_abstract_scale.cpp.

const QwtScaleEngine * QwtAbstractScale::scaleEngine ( ) const
Returns
Scale engine
See also
setScaleEngine()

Definition at line 328 of file qwt_abstract_scale.cpp.

QwtScaleEngine * QwtAbstractScale::scaleEngine ( )
Returns
Scale engine
See also
setScaleEngine()

Definition at line 337 of file qwt_abstract_scale.cpp.

const QwtScaleMap & QwtAbstractScale::scaleMap ( ) const
Returns
Map to translate between scale and widget coordinates

Definition at line 356 of file qwt_abstract_scale.cpp.

int QwtAbstractScale::scaleMaxMajor ( ) const
int QwtAbstractScale::scaleMaxMinor ( ) const
double QwtAbstractScale::scaleStepSize ( ) const
void QwtAbstractScale::setAbstractScaleDraw ( QwtAbstractScaleDraw scaleDraw)
protected

Set a scale draw.

scaleDraw has to be created with new and will be deleted in the destructor or the next call of setAbstractScaleDraw().

See also
abstractScaleDraw()

Definition at line 276 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setLowerBound ( double  value)

Set the lower bound of the scale

Parameters
valueLower bound
See also
lowerBound(), setScale(), setUpperBound()
Note
For inverted scales the lower bound is greater than the upper bound

Definition at line 78 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScale ( double  lowerBound,
double  upperBound 
)

Specify a scale.

Define a scale by an interval

The ticks are calculated using scaleMaxMinor(), scaleMaxMajor() and scaleStepSize().

Parameters
lowerBoundlower limit of the scale interval
upperBoundupper limit of the scale interval
Note
For inverted scales the lower bound is greater than the upper bound

Definition at line 129 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScale ( const QwtInterval interval)

Specify a scale.

Define a scale by an interval

The ticks are calculated using scaleMaxMinor(), scaleMaxMajor() and scaleStepSize().

Parameters
intervalInterval

Definition at line 144 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScale ( const QwtScaleDiv scaleDiv)

Specify a scale.

scaleMaxMinor(), scaleMaxMajor() and scaleStepSize() and have no effect.

Parameters
scaleDivScale division
See also
setAutoScale()

Definition at line 157 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScaleEngine ( QwtScaleEngine scaleEngine)

Set a scale engine.

The scale engine is responsible for calculating the scale division and provides a transformation between scale and widget coordinates.

scaleEngine has to be created with new and will be deleted in the destructor or the next call of setScaleEngine.

Definition at line 315 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScaleMaxMajor ( int  ticks)

Set the maximum number of major tick intervals.

The scale's major ticks are calculated automatically such that the number of major intervals does not exceed ticks.

The default value is 5.

Parameters
ticksMaximal number of major ticks.
See also
scaleMaxMajor(), setScaleMaxMinor(), setScaleStepSize(), QwtScaleEngine::divideInterval()

Definition at line 188 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScaleMaxMinor ( int  ticks)

Set the maximum number of minor tick intervals.

The scale's minor ticks are calculated automatically such that the number of minor intervals does not exceed ticks. The default value is 3.

Parameters
ticksMaximal number of minor ticks.
See also
scaleMaxMajor(), setScaleMaxMinor(), setScaleStepSize(), QwtScaleEngine::divideInterval()

Definition at line 218 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setScaleStepSize ( double  stepSize)

Set the step size used for calculating a scale division.

The step size is hint for calculating the intervals for the major ticks of the scale. A value of 0.0 is interpreted as no hint.

Parameters
stepSizeHint for the step size of the scale
See also
scaleStepSize(), QwtScaleEngine::divideScale()
Note
Position and distance between the major ticks also depends on scaleMaxMajor().

Definition at line 250 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::setUpperBound ( double  value)

Set the upper bound of the scale

Parameters
valueUpper bound
See also
upperBound(), setScale(), setLowerBound()
Note
For inverted scales the lower bound is greater than the upper bound

Definition at line 101 of file qwt_abstract_scale.cpp.

int QwtAbstractScale::transform ( double  value) const

Translate a scale value into a widget coordinate

Parameters
valueScale value
Returns
Corresponding widget coordinate for value
See also
scaleMap(), invTransform()

Definition at line 368 of file qwt_abstract_scale.cpp.

void QwtAbstractScale::updateScaleDraw ( )
protected

Recalculate ticks and scale boundaries.

Definition at line 465 of file qwt_abstract_scale.cpp.

double QwtAbstractScale::upperBound ( ) const

Member Data Documentation

PrivateData* QwtAbstractScale::d_data
private

Definition at line 102 of file qwt_abstract_scale.h.

Property Documentation

double QwtAbstractScale::lowerBound
readwrite
Returns
Lower bound of the scale
See also
setLowerBound(), setScale(), upperBound()

Definition at line 40 of file qwt_abstract_scale.h.

int QwtAbstractScale::scaleMaxMajor
readwrite
Returns
Maximal number of major tick intervals
See also
setScaleMaxMajor(), scaleMaxMinor()

Definition at line 43 of file qwt_abstract_scale.h.

int QwtAbstractScale::scaleMaxMinor
readwrite
Returns
Maximal number of minor tick intervals
See also
setScaleMaxMinor(), scaleMaxMajor()

Definition at line 44 of file qwt_abstract_scale.h.

double QwtAbstractScale::scaleStepSize
readwrite
Returns
Hint for the step size of the scale
See also
setScaleStepSize(), QwtScaleEngine::divideScale()

Definition at line 46 of file qwt_abstract_scale.h.

double QwtAbstractScale::upperBound
readwrite
Returns
Upper bound of the scale
See also
setUpperBound(), setScale(), lowerBound()

Definition at line 41 of file qwt_abstract_scale.h.


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


plotjuggler
Author(s): Davide Faconti
autogenerated on Sat Jul 6 2019 03:44:18