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Qwt User's Guide 6.0.1
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QwtAlphaColorMap variies the alpha value of a color. More...
#include <qwt_color_map.h>

Public Types | |
| enum | Format { RGB, Indexed } |
Public Member Functions | |
| QColor | color () const |
| QColor | color (const QwtInterval &, double value) const |
| virtual QVector< QRgb > | colorTable (const QwtInterval &) const |
| Format | format () const |
| QwtAlphaColorMap (const QColor &=QColor(Qt::gray)) | |
| virtual QRgb | rgb (const QwtInterval &, double value) const |
| void | setColor (const QColor &) |
| virtual | ~QwtAlphaColorMap () |
QwtAlphaColorMap variies the alpha value of a color.
enum QwtColorMap::Format [inherited] |
Format for color mapping
| QwtAlphaColorMap::QwtAlphaColorMap | ( | const QColor & | color = QColor( Qt::gray ) | ) |
Constructor
| color | Color of the map |
| QwtAlphaColorMap::~QwtAlphaColorMap | ( | ) | [virtual] |
Destructor.
| QColor QwtAlphaColorMap::color | ( | ) | const |
| QColor QwtColorMap::color | ( | const QwtInterval & | interval, |
| double | value | ||
| ) | const [inline, inherited] |
Map a value into a color
| interval | Valid interval for values |
| value | Value |
| QVector< QRgb > QwtColorMap::colorTable | ( | const QwtInterval & | interval | ) | const [virtual, inherited] |
Build and return a color map of 256 colors
The color table is needed for rendering indexed images in combination with using colorIndex().
| interval | Range for the values |
| QwtColorMap::Format QwtColorMap::format | ( | ) | const [inline, inherited] |
| 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 | ) |
1.7.3