QwtAlphaColorMap varies the alpha value of a color.
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#include <qwt_color_map.h>
QwtAlphaColorMap varies the alpha value of a color.
◆ QwtAlphaColorMap()
QwtAlphaColorMap::QwtAlphaColorMap |
( |
const QColor & |
color = QColor( Qt::gray ) | ) |
|
◆ color()
QColor QwtAlphaColorMap::color |
( |
| ) |
const |
◆ rgb()
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();
- Parameters
-
interval | Range for all values |
value | Value to map into a RGB value |
- Returns
- RGB value, with an alpha value
Implements QwtColorMap.
◆ setColor()
void QwtAlphaColorMap::setColor |
( |
const QColor & |
color | ) |
|
Set the color
- Parameters
-
- See also
- color()