A scale engine for logarithmic scales. More...
#include <qwt_scale_engine.h>
Inheritance diagram for QwtLogScaleEngine:
Public Member Functions | |
| QwtLogScaleEngine (uint base=10) | |
| Constructor. | |
| virtual | ~QwtLogScaleEngine () |
| Destructor. | |
| virtual void | autoScale (int maxNumSteps, double &x1, double &x2, double &stepSize) const override |
| Align and divide an interval. | |
| virtual QwtScaleDiv | divideScale (double x1, double x2, int maxMajorSteps, int maxMinorSteps, double stepSize=0.0) const override |
| Calculate a scale division for an interval. | |
 Public Member Functions inherited from QwtScaleEngine | |
| QwtScaleEngine (uint base=10) | |
| Constructor. | |
| virtual | ~QwtScaleEngine () |
| Destructor. | |
| void | setBase (uint base) |
| Set the base. | |
| uint | base () const |
| Return base of the scale engine. | |
| void | setAttribute (Attribute, bool on=true) |
| Set an attribute. | |
| bool | testAttribute (Attribute) const |
| Test if an attribute is enabled. | |
| void | setAttributes (Attributes) |
| Set attributes. | |
| Attributes | attributes () const |
| Return scale attributes. | |
| void | setReference (double) |
| Set the reference value. | |
| double | reference () const |
| Return the reference value. | |
| void | setMargins (double lower, double upper) |
| Set the margins. | |
| double | lowerMargin () const |
| Return the margin at the lower end of the scale. | |
| double | upperMargin () const |
| Return the margin at the upper end of the scale. | |
| void | setTransformation (QwtTransform *) |
| Set the transformation. | |
| QwtTransform * | transformation () const |
| Create and return a clone of the transformation of the engine. | |
Protected Member Functions | |
| QwtInterval | align (const QwtInterval &, double stepSize) const |
| Align an interval to a step size. | |
| void | buildTicks (const QwtInterval &, double stepSize, int maxMinorSteps, QList< double > ticks[QwtScaleDiv::NTickTypes]) const |
| Calculate ticks for an interval. | |
| QList< double > | buildMajorTicks (const QwtInterval &interval, double stepSize) const |
| Calculate major ticks for an interval. | |
| void | buildMinorTicks (const QList< double > &majorTicks, int maxMinorSteps, double stepSize, QList< double > &minorTicks, QList< double > &mediumTicks) const |
| Calculate minor/medium ticks for major ticks. | |
| Protected Member Functions inherited from QwtScaleEngine | |
| bool | contains (const QwtInterval &, double value) const |
| Check if an interval contains a value. | |
| QList< double > | strip (const QList< double > &, const QwtInterval &) const |
| Strip values outside an interval. | |
| double | divideInterval (double intervalSize, int numSteps) const |
| Divide an interval. | |
| QwtInterval | buildInterval (double value) const |
| Build an interval around a value. | |
Additional Inherited Members | |
| Public Types inherited from QwtScaleEngine | |
| enum | Attribute { NoAttribute = 0x00 , IncludeReference = 0x01 , Symmetric = 0x02 , Floating = 0x04 , Inverted = 0x08 } |
| Layout attributes. More... | |
Detailed Description
A scale engine for logarithmic scales.
Constructor & Destructor Documentation
◆ QwtLogScaleEngine()
|
explicit |
Constructor.
Member Function Documentation
◆ align()
|
protected |
Align an interval to a step size.
◆ autoScale()
|
overridevirtual |
Align and divide an interval.
Implements QwtScaleEngine.
◆ buildMajorTicks()
|
protected |
Calculate major ticks for an interval.
◆ buildMinorTicks()
|
protected |
Calculate minor/medium ticks for major ticks.
◆ buildTicks()
|
protected |
Calculate ticks for an interval.
◆ divideScale()
|
overridevirtual |
Calculate a scale division for an interval.
Implements QwtScaleEngine.
The documentation for this class was generated from the following files:
- /home/runner/work/QWT/QWT/src/plot/qwt_scale_engine.h
- /home/runner/work/QWT/QWT/src/plot/qwt_scale_engine.cpp
