Qwt User's Guide
|
QwtAlphaColorMap varies the alpha value of a color. More...
#include <qwt_color_map.h>
Public Member Functions | |
QwtAlphaColorMap (const QColor &=QColor(Qt::gray)) | |
virtual | ~QwtAlphaColorMap () |
Destructor. | |
void | setColor (const QColor &) |
QColor | color () const |
virtual QRgb | rgb (const QwtInterval &, double value) const |
Map a value of a given interval into a alpha value. |
QwtAlphaColorMap varies the alpha value of a color.
QwtAlphaColorMap::QwtAlphaColorMap | ( | const QColor & | color = QColor( Qt::gray ) | ) |
Constructor
color | Color of the map |
QColor QwtAlphaColorMap::color | ( | ) | const |
QRgb QwtAlphaColorMap::rgb | ( | const QwtInterval & | interval, |
double | value | ||
) | const [virtual] |
Map a value of a given interval into a alpha value.
alpha := (value - interval.minValue()) / interval.width();
interval | Range for all values |
value | Value to map into a RGB value |
Implements QwtColorMap.
void QwtAlphaColorMap::setColor | ( | const QColor & | color | ) |