---

QwtScaleIf Class Reference

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

#include <qwt_sclif.h>

Inheritance diagram for QwtScaleIf::

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

---

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.

---

Constructor & Destructor Documentation

QwtScaleIf::QwtScaleIf (    )

Constructor.

QwtScaleIf::~QwtScaleIf (    )  [virtual]

Destructor.

---

Member Function Documentation

void QwtScaleIf::autoScale (    )

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

bool QwtScaleIf::hasUserScale (    )  [protected]

Check for user-defined scale.

virtual void QwtScaleIf::scaleChange (    )  [protected, pure virtual]

Notify changed scale. Reimplemented in QwtSlider, and QwtThermo.

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: QwtScaleIf::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: QwtScaleIf::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

---