A scale engine for linear scales. More...
#include <qwt_scale_engine.h>

Public Member Functions | |
| virtual void | autoScale (int maxSteps, double &x1, double &x2, double &stepSize) const |
| virtual QwtScaleDiv | divideScale (double x1, double x2, int numMajorSteps, int numMinorSteps, double stepSize=0.0) const |
| virtual QwtScaleTransformation * | transformation () const |
Protected Member Functions | |
| QwtDoubleInterval | align (const QwtDoubleInterval &, double stepSize) const |
A scale engine for linear scales.
The step size will fit into the pattern
, where n is an integer.
| QwtDoubleInterval QwtLinearScaleEngine::align | ( | const QwtDoubleInterval & | interval, | |
| double | stepSize | |||
| ) | const [protected] |
Align an interval to a step size.
The limits of an interval are aligned that both are integer multiples of the step size.
| interval | Interval | |
| stepSize | Step size |
| void QwtLinearScaleEngine::autoScale | ( | int | maxNumSteps, | |
| double & | x1, | |||
| double & | x2, | |||
| double & | stepSize | |||
| ) | const [virtual] |
Align and divide an interval
| maxNumSteps | Max. number of steps | |
| x1 | First limit of the interval (In/Out) | |
| x2 | Second limit of the interval (In/Out) | |
| stepSize | Step size (Out) |
Implements QwtScaleEngine.
| QwtScaleDiv QwtLinearScaleEngine::divideScale | ( | double | x1, | |
| double | x2, | |||
| int | maxMajSteps, | |||
| int | maxMinSteps, | |||
| double | stepSize = 0.0 | |||
| ) | const [virtual] |
Calculate a scale division.
| x1 | First interval limit | |
| x2 | Second interval limit | |
| maxMajSteps | Maximum for the number of major steps | |
| maxMinSteps | Maximum number of minor steps | |
| stepSize | Step size. If stepSize == 0, the scaleEngine calculates one. |
Implements QwtScaleEngine.
| QwtScaleTransformation * QwtLinearScaleEngine::transformation | ( | ) | const [virtual] |
Return a transformation, for linear scales
Implements QwtScaleEngine.
1.6.3