QwtAbstractScale(3) Qwt User's Guide QwtAbstractScale(3)NAMEQwtAbstractScale-
SYNOPSIS
#include <qwt_abstract_scale.h>
Inherited by QwtKnob, QwtSlider, and QwtThermo.
Public Member Functions
QwtAbstractScale ()
virtual ~QwtAbstractScale ()
bool autoScale () const
const QwtScaleEngine * scaleEngine () const
QwtScaleEngine * scaleEngine ()
const QwtScaleMap & scaleMap () const
int scaleMaxMajor () const
int scaleMaxMinor () const
void setAutoScale ()
void setScale (double vmin, double vmax, double step=0.0)
void setScale (const QwtDoubleInterval &, double step=0.0)
void setScale (const QwtScaleDiv &s)
void setScaleEngine (QwtScaleEngine *)
void setScaleMaxMajor (int ticks)
void setScaleMaxMinor (int ticks)
Protected Member Functions
const QwtAbstractScaleDraw * abstractScaleDraw () const
QwtAbstractScaleDraw * abstractScaleDraw ()
void rescale (double vmin, double vmax, double step=0.0)
virtual void scaleChange ()
void setAbstractScaleDraw (QwtAbstractScaleDraw *)
Detailed Description
An abstract base class for classes containing a scale.
QwtAbstractScale is used to provide classes with a QwtScaleDraw, and a
QwtScaleDiv. The QwtScaleDiv might be set explicitely or calculated by
a QwtScaleEngine.
Constructor & Destructor Documentation
QwtAbstractScale::QwtAbstractScale ()
Constructor
Creates a default QwtScaleDraw and a QwtLinearScaleEngine. Autoscaling
is enabled, and the stepSize is initialized by 0.0.
Member Function Documentation
const QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw () const
[protected]
Returns:
Scale draw
See also:
setAbstractScaleDraw()
QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw () [protected]
Returns:
Scale draw
See also:
setAbstractScaleDraw()
bool QwtAbstractScale::autoScale () const
Returns:
true if autoscaling is enabled
void QwtAbstractScale::rescale (doublevmin, doublevmax, doublestepSize =
0.0) [protected]
Recalculate the scale division and update the scale draw.
Parameters:
vmin Lower limit of the scale interval
vmax Upper limit of the scale interval
stepSize Major step size
See also:
scaleChange()
void QwtAbstractScale::scaleChange () [protected], [virtual]
Notify changed scale. Dummy empty implementation, intended to be
overloaded by derived classes
Reimplemented in QwtThermo, and QwtSlider.
const QwtScaleEngine * QwtAbstractScale::scaleEngine () const
Returns:
Scale engine
See also:
setScaleEngine()
QwtScaleEngine * QwtAbstractScale::scaleEngine ()
Returns:
Scale engine
See also:
setScaleEngine()
const QwtScaleMap & QwtAbstractScale::scaleMap () const
Returns:
abstractScaleDraw()->scaleMap()
int QwtAbstractScale::scaleMaxMajor () const
Returns:
Max. number of major tick intervals The default value is 5.
int QwtAbstractScale::scaleMaxMinor () const
Returns:
Max. number of minor tick intervals The default value is 3.
void QwtAbstractScale::setAbstractScaleDraw (QwtAbstractScaleDraw
*scaleDraw) [protected]
Set a scale draw. scaleDraw has to be created with new and will be
deleted in ~QwtAbstractScale or the next call of setAbstractScaleDraw.
void QwtAbstractScale::setAutoScale ()
Advise the widget to control the scale range internally. Autoscaling is
on by default.
See also:
setScale(), autoScale()
void QwtAbstractScale::setScale (doublevmin, doublevmax, doublestepSize =
0.0)
Specify a scale. Disable autoscaling and define a scale by an interval
and a step size
Parameters:
vmin lower limit of the scale interval
vmax upper limit of the scale interval
stepSize major step size
See also:
setAutoScale()
void QwtAbstractScale::setScale (const QwtDoubleInterval &interval,
doublestepSize = 0.0)
Specify a scale. Disable autoscaling and define a scale by an interval
and a step size
Parameters:
interval Interval
stepSize major step size
See also:
setAutoScale()
void QwtAbstractScale::setScale (const QwtScaleDiv &scaleDiv)
Specify a scale. Disable autoscaling and define a scale by a scale
division
Parameters:
scaleDiv Scale division
See also:
setAutoScale()
void QwtAbstractScale::setScaleEngine (QwtScaleEngine *scaleEngine)
Set a scale engine. The scale engine is responsible for calculating the
scale division, and in case of auto scaling how to align the scale.
scaleEngine has to be created with new and will be deleted in
~QwtAbstractScale or the next call of setScaleEngine.
void QwtAbstractScale::setScaleMaxMajor (intticks)
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:
QwtAbstractScaleDraw
void QwtAbstractScale::setScaleMaxMinor (intticks)
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:
QwtAbstractScaleDraw
Author
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Version 5.2.3 Tue Nov 20 2012 QwtAbstractScale(3)
