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Qwt User's Guide
6.0.2
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#include <qwt_scale_map.h>
Public Types | |
| enum | Type { Linear, Log10, Other } |
Public Member Functions | |
| QwtScaleTransformation (Type type) | |
| virtual | ~QwtScaleTransformation () |
| virtual QwtScaleTransformation * | copy () const |
| virtual double | invXForm (double p, double p1, double p2, double s1, double s2) const |
| Type | type () const |
| virtual double | xForm (double s, double s1, double s2, double p1, double p2) const |
A transformation between coordinate systems.
QwtScaleTransformation offers transformations from the coordinate system of a scale into the linear coordinate system of a paint device and vice versa.
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virtual |
Transform a value from the coordinate system of the paint device into the coordinate system of a scale.
| p | Value related to the coordinate system of the paint device |
| p1 | First border of the coordinate system of the paint device |
| p2 | Second border of the coordinate system of the paint device |
| s1 | First border of the coordinate system of the scale |
| s2 | Second border of the coordinate system of the scale |
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inline |
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virtual |
Transform a value from the coordinate system of a scale into the coordinate system of the paint device.
| s | Value related to the coordinate system of the scale |
| s1 | First border of the coordinate system of the scale |
| s2 | Second border of the coordinate system of the scale |
| p1 | First border of the coordinate system of the paint device |
| p2 | Second border of the coordinate system of the paint device |
1.8.1