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Qwt User's Guide 6.0.1
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A scale map. More...
#include <qwt_scale_map.h>
Public Member Functions | |
| double | invTransform (double p) const |
| bool | isInverting () const |
| QwtScaleMap & | operator= (const QwtScaleMap &) |
| double | p1 () const |
| double | p2 () const |
| double | pDist () const |
| QwtScaleMap (const QwtScaleMap &) | |
| QwtScaleMap () | |
| double | s1 () const |
| double | s2 () const |
| double | sDist () const |
| void | setPaintInterval (double p1, double p2) |
| void | setScaleInterval (double s1, double s2) |
| void | setTransformation (QwtScaleTransformation *) |
| double | transform (double s) const |
| const QwtScaleTransformation * | transformation () const |
| ~QwtScaleMap () | |
Static Public Member Functions | |
| static QRectF | invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &) |
| static QPointF | invTransform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &) |
| static QPointF | transform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &) |
| static QRectF | transform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &) |
Public Attributes | |
| QT_STATIC_CONST double | LogMax = 1.0e150 |
| QT_STATIC_CONST double | LogMin = 1.0e-150 |
A scale map.
QwtScaleMap offers transformations from the coordinate system of a scale into the linear coordinate system of a paint device and vice versa.
| QwtScaleMap::QwtScaleMap | ( | ) |
Constructor.
The scale and paint device intervals are both set to [0,1].
| QwtScaleMap::QwtScaleMap | ( | const QwtScaleMap & | other | ) |
Copy constructor.
| QwtScaleMap::~QwtScaleMap | ( | ) |
Destructor
| double QwtScaleMap::invTransform | ( | double | p | ) | const [inline] |
Transform an paint device value into a value in the interval of the scale.
| p | Value relative to the coordinates of the paint device |
| QPointF QwtScaleMap::invTransform | ( | const QwtScaleMap & | xMap, |
| const QwtScaleMap & | yMap, | ||
| const QPointF & | pos | ||
| ) | [static] |
Transform a rectangle from paint to scale coordinates
| xMap | X map |
| yMap | Y map |
| pos | Position in paint coordinates |
| QRectF QwtScaleMap::invTransform | ( | const QwtScaleMap & | xMap, |
| const QwtScaleMap & | yMap, | ||
| const QRectF & | rect | ||
| ) | [static] |
Transform a rectangle from paint to scale coordinates
| xMap | X map |
| yMap | Y map |
| rect | Rectangle in paint coordinates |
| bool QwtScaleMap::isInverting | ( | ) | const [inline] |
| QwtScaleMap & QwtScaleMap::operator= | ( | const QwtScaleMap & | other | ) |
Assignment operator.
| double QwtScaleMap::p1 | ( | ) | const [inline] |
| double QwtScaleMap::p2 | ( | ) | const [inline] |
| double QwtScaleMap::s1 | ( | ) | const [inline] |
| double QwtScaleMap::s2 | ( | ) | const [inline] |
| void QwtScaleMap::setPaintInterval | ( | double | p1, |
| double | p2 | ||
| ) |
Specify the borders of the paint device interval.
| p1 | first border |
| p2 | second border |
| void QwtScaleMap::setScaleInterval | ( | double | s1, |
| double | s2 | ||
| ) |
Specify the borders of the scale interval.
| s1 | first border |
| s2 | second border |
| void QwtScaleMap::setTransformation | ( | QwtScaleTransformation * | transformation | ) |
Initialize the map with a transformation
| QPointF QwtScaleMap::transform | ( | const QwtScaleMap & | xMap, |
| const QwtScaleMap & | yMap, | ||
| const QPointF & | pos | ||
| ) | [static] |
Transform a point from scale to paint coordinates
| xMap | X map |
| yMap | Y map |
| pos | Position in scale coordinates |
| double QwtScaleMap::transform | ( | double | s | ) | const [inline] |
Transform a point related to the scale interval into an point related to the interval of the paint device
| s | Value relative to the coordinates of the scale |
| QRectF QwtScaleMap::transform | ( | const QwtScaleMap & | xMap, |
| const QwtScaleMap & | yMap, | ||
| const QRectF & | rect | ||
| ) | [static] |
Transform a rectangle from scale to paint coordinates
| xMap | X map |
| yMap | Y map |
| rect | Rectangle in scale coordinates |
| const QwtScaleTransformation * QwtScaleMap::transformation | ( | ) | const |
Get the transformation.
| QT_STATIC_CONST_IMPL double QwtScaleMap::LogMax = 1.0e150 |
Largest allowed value for logarithmic scales: 1.0e150.
| QT_STATIC_CONST_IMPL double QwtScaleMap::LogMin = 1.0e-150 |
Smallest allowed value for logarithmic scales: 1.0e-150.
1.7.3