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

NAME

QwtAbstractScale -

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 Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.3 Tue Nov 20 2012 QwtAbstractScale(3)

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