QwtAbstractScale Class Reference
An abstract base class for classes containing a scale. More...
#include <qwt_abstract_scale.h>
Public Member Functions | |
| QwtAbstractScale () | |
| virtual | ~QwtAbstractScale () |
| void | setScale (double vmin, double vmax, double step=0.0) |
| void | setScale (const QwtDoubleInterval &, double step=0.0) |
| void | setScale (const QwtScaleDiv &s) |
| void | setAutoScale () |
| bool | autoScale () const |
| void | setScaleMaxMajor (int ticks) |
| int | scaleMaxMinor () const |
| void | setScaleMaxMinor (int ticks) |
| int | scaleMaxMajor () const |
| void | setScaleEngine (QwtScaleEngine *) |
| const QwtScaleEngine * | scaleEngine () const |
| QwtScaleEngine * | scaleEngine () |
| const QwtScaleMap & | scaleMap () const |
Protected Member Functions | |
| void | rescale (double vmin, double vmax, double step=0.0) |
| void | setAbstractScaleDraw (QwtAbstractScaleDraw *) |
| const QwtAbstractScaleDraw * | abstractScaleDraw () const |
| QwtAbstractScaleDraw * | abstractScaleDraw () |
| virtual void | scaleChange () |
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.
| QwtAbstractScale::~QwtAbstractScale | ( | ) | [virtual] |
Destructor.
Member Function Documentation
| QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw | ( | ) | [protected] |
- Returns:
- Scale draw
- See also:
- setAbstractScaleDraw()
| const QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw | ( | ) | const [protected] |
- Returns:
- Scale draw
- See also:
- setAbstractScaleDraw()
| bool QwtAbstractScale::autoScale | ( | ) | const |
- Returns:
trueif autoscaling is enabled
| void QwtAbstractScale::rescale | ( | double | vmin, | |
| double | vmax, | |||
| double | stepSize = 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] |
| QwtScaleEngine * QwtAbstractScale::scaleEngine | ( | ) |
- Returns:
- Scale engine
- See also:
- setScaleEngine()
| const QwtScaleEngine * QwtAbstractScale::scaleEngine | ( | ) | const |
- 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 | ( | 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::setScale | ( | const QwtDoubleInterval & | interval, | |
| double | stepSize = 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 | ( | double | vmin, | |
| double | vmax, | |||
| double | stepSize = 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::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 | ( | 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:
- QwtAbstractScaleDraw
| 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:
-
ticks
- See also:
- QwtAbstractScaleDraw
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