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QwtScaleIf Class Reference

An interface class for widgets containing a scale. More...

#include <qwt_sclif.h>

Inherited by QwtKnob, QwtSlider, and QwtThermo.

Inheritance diagram for QwtScaleIf

[legend]List of all members.

Public Methods
	QwtScaleIf ()
virtual	~QwtScaleIf ()
void	setScale (double vmin, double vmax, int logarithmic = 0)
void	setScale (double vmin, double vmax, double step, int logarithmic = 0)
void	setScale (const QwtScaleDiv &s)
void	setScaleMaxMajor ( int ticks)
void	setScaleMaxMinor ( int ticks)
void	autoScale ()
int	scaleMaxMinor () const
int	scaleMaxMajor () const
Protected Methods
bool	hasUserScale ()
virtual void	scaleChange () = 0
Protected Attributes
QwtScaleDraw	d_scale
int	d_maxMajor
int	d_maxMinor

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Detailed Description

An interface class for widgets containing a scale.

This interface class is used to provide classes with a protected QwtScaleDraw member and a public interface to access that scale.

For internal use only.

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Constructor & Destructor Documentation

QwtScaleIf::QwtScaleIf ( )

Constructor.

QwtScaleIf::~QwtScaleIf ( ) [virtual]

Destructor.

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Member Function Documentation

void QwtScaleIf::autoScale ( )

Advise the widget to control the scale range internally. Autoscaling is on by default. See also: setScale()

bool QwtScaleIf::hasUserScale ( ) [protected]

Check for user-defined scale.

int QwtScaleIf::scaleMaxMajor ( ) const

Returns: max. number of major tick intervals

int QwtScaleIf::scaleMaxMinor ( ) const

Returns: max. number of minor tick intervals

void QwtScaleIf::setScale ( const QwtScaleDiv & s )

Parameters: Assign   a user-defined scale division s   scale division

void QwtScaleIf::setScale ( double vmin, double vmax, double step, int logarithmic = 0 )

Specify a user-defined scale. By default, the widget is supposed to control the range of its scale automatically, but sometimes it is desirable to have a user-defined scale which is not in sync with the widget's range, e.g. if a logarithmic scale is needed (sliders don't support that) or if the scale is required to have a fixed range (say 0...100%), independent of the widget's range. Parameters: vmin   vmax   interval boundaries step   major step size logarithmic   If != 0, build a logarithmic scale See also: autoScale()

void QwtScaleIf::setScale ( double vmin, double vmax, int logarithmic = 0 )

Specify a user-defined scale. By default, the widget is supposed to control the range of its scale automatically, but sometimes it is desirable to have a user-defined scale which is not in sync with the widget's range, e.g. if a logarithmic scale is needed (sliders don't support that) or if the scale is required to have a fixed range (say 0...100%), independent of the widget's range. Parameters: vmin   vmax   boundary values logarithmic   If != 0, Build a logarithmic scale See also: autoScale()

void QwtScaleIf::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: ticks   maximal number of major ticks. See also: QwtScaleDraw

void QwtScaleIf::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: ticks   See also: QwtScaleDraw

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

• qwt_sclif.h
• qwt_sclif.cpp

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