A color stop is a color at a specific position. The valid range for the positions is [0.0, 1.0]. When mapping a value into a color it is translated into this interval. If mode() == FixedColors the color is calculated from the next lower color stop. If mode() == ScaledColors the color is calculated by interpolating the colors of the adjacent stops.
Definition at line 111 of file qwt_color_map.h.
Public Types | |
enum | Mode { FixedColors, ScaledColors, RotateNeedle, RotateScale } |
Public Member Functions | |
QwtLinearColorMap (QwtColorMap::Format=QwtColorMap::RGB) | |
QwtLinearColorMap (const QColor &from, const QColor &to, QwtColorMap::Format=QwtColorMap::RGB) | |
QwtLinearColorMap (const QwtLinearColorMap &) | |
virtual | ~QwtLinearColorMap () |
QwtLinearColorMap & | operator= (const QwtLinearColorMap &) |
virtual QwtColorMap * | copy () const |
void | setMode (Mode) |
Mode | mode () const |
void | setColorInterval (const QColor &color1, const QColor &color2) |
void | addColorStop (double value, const QColor &) |
QwtArray< double > | colorStops () const |
QColor | color1 () const |
QColor | color2 () const |
virtual QRgb | rgb (const QwtDoubleInterval &, double value) const |
virtual unsigned char | colorIndex (const QwtDoubleInterval &, double value) const |
QwtLinearColorMap::QwtLinearColorMap | ( | QwtColorMap::Format | format = QwtColorMap::RGB |
) |
Build a color map with two stops at 0.0 and 1.0. The color at 0.0 is Qt::blue, at 1.0 it is Qt::yellow.
format | Preferred format of the color map |
Definition at line 211 of file qwt_color_map.cpp.
References setColorInterval().
Referenced by copy().
QwtLinearColorMap::QwtLinearColorMap | ( | const QColor & | color1, | |
const QColor & | color2, | |||
QwtColorMap::Format | format = QwtColorMap::RGB | |||
) |
Build a color map with two stops at 0.0 and 1.0.
color1 | Color used for the minimum value of the value interval | |
color2 | Color used for the maximum value of the value interval | |
format | Preferred format of the coor map |
Definition at line 235 of file qwt_color_map.cpp.
References setColorInterval().
QwtLinearColorMap::QwtLinearColorMap | ( | const QwtLinearColorMap & | ) |
QwtLinearColorMap::~QwtLinearColorMap | ( | ) | [virtual] |
QwtLinearColorMap & QwtLinearColorMap::operator= | ( | const QwtLinearColorMap & | ) |
QwtColorMap * QwtLinearColorMap::copy | ( | ) | const [virtual] |
Clone the color map.
Implements QwtColorMap.
Definition at line 260 of file qwt_color_map.cpp.
References QwtLinearColorMap().
void QwtLinearColorMap::setMode | ( | Mode | mode | ) |
Set the mode of the color map.
FixedColors means the color is calculated from the next lower color stop. ScaledColors means the color is calculated by interpolating the colors of the adjacent stops.
Definition at line 277 of file qwt_color_map.cpp.
QwtLinearColorMap::Mode QwtLinearColorMap::mode | ( | ) | const |
void QwtLinearColorMap::setColorInterval | ( | const QColor & | color1, | |
const QColor & | color2 | |||
) |
Set the color range
Add stops at 0.0 and 1.0.
color1 | Color used for the minimum value of the value interval | |
color2 | Color used for the maximum value of the value interval |
Definition at line 301 of file qwt_color_map.cpp.
Referenced by QwtLinearColorMap().
void QwtLinearColorMap::addColorStop | ( | double | value, | |
const QColor & | color | |||
) |
Add a color stop
The value has to be in the range [0.0, 1.0]. F.e. a stop at position 17.0 for a range [10.0,20.0] must be passed as: (17.0 - 10.0) / (20.0 - 10.0)
value | Value between [0.0, 1.0] | |
color | Color stop |
Definition at line 319 of file qwt_color_map.cpp.
QwtArray< double > QwtLinearColorMap::colorStops | ( | ) | const |
Return all positions of color stops in increasing order
Definition at line 328 of file qwt_color_map.cpp.
QColor QwtLinearColorMap::color1 | ( | ) | const |
Definition at line 337 of file qwt_color_map.cpp.
QColor QwtLinearColorMap::color2 | ( | ) | const |
Definition at line 346 of file qwt_color_map.cpp.
QRgb QwtLinearColorMap::rgb | ( | const QwtDoubleInterval & | interval, | |
double | value | |||
) | const [virtual] |
Map a value of a given interval into a rgb value
interval | Range for all values | |
value | Value to map into a rgb value |
Implements QwtColorMap.
Definition at line 357 of file qwt_color_map.cpp.
References QwtDoubleInterval::minValue(), and QwtDoubleInterval::width().
unsigned char QwtLinearColorMap::colorIndex | ( | const QwtDoubleInterval & | interval, | |
double | value | |||
) | const [virtual] |
Map a value of a given interval into a color index, between 0 and 255
interval | Range for all values | |
value | Value to map into a color index |
Implements QwtColorMap.
Definition at line 375 of file qwt_color_map.cpp.
References QwtDoubleInterval::maxValue(), QwtDoubleInterval::minValue(), and QwtDoubleInterval::width().