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QwtLinearColorMap(3) Qwt User's Guide QwtLinearColorMap(3)

QwtLinearColorMap -

#include <qwt_color_map.h>
Inherits QwtColorMap.


enum Mode { FixedColors, ScaledColors }
 


QwtLinearColorMap (QwtColorMap::Format=QwtColorMap::RGB)
 
QwtLinearColorMap (const QColor &from, const QColor &to, QwtColorMap::Format=QwtColorMap::RGB)
 
QwtLinearColorMap (const QwtLinearColorMap &)
 
virtual ~QwtLinearColorMap ()
 
void addColorStop (double value, const QColor &)
 
QColor color1 () const
 
QColor color2 () const
 
virtual unsigned char colorIndex (const QwtDoubleInterval &, double value) const
 
QwtArray< double > colorStops () const
 
virtual QwtColorMap * copy () const
 
Mode mode () const
 
QwtLinearColorMap & operator= (const QwtLinearColorMap &)
 
virtual QRgb rgb (const QwtDoubleInterval &, double value) const
 
void setColorInterval (const QColor &color1, const QColor & color2)
 
void setMode (Mode)
 

QwtLinearColorMap builds a color map from color stops.
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.

Mode of color map
See also:
setMode(), mode()

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.
Parameters:
format Preferred format of the color map

Build a color map with two stops at 0.0 and 1.0.
Parameters:
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

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)
Parameters:
value Value between [0.0, 1.0]
 
color Color stop

Returns:
the first color of the color range
See also:
setColorInterval()

Returns:
the second color of the color range
See also:
setColorInterval()

Map a value of a given interval into a color index, between 0 and 255
Parameters:
interval Range for all values
 
value Value to map into a color index
Implements QwtColorMap.

Return all positions of color stops in increasing order

Returns:
Mode of the color map
See also:
setMode()

Map a value of a given interval into a rgb value
Parameters:
interval Range for all values
 
value Value to map into a rgb value
Implements QwtColorMap.

Set the color range
Add stops at 0.0 and 1.0.
Parameters:
color1 Color used for the minimum value of the value interval
 
color2 Color used for the maximum value of the value interval
See also:
color1(), color2()

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.
See also:
mode()

Generated automatically by Doxygen for Qwt User's Guide from the source code.
Tue Nov 20 2012 Version 5.2.3

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