.TH "QwtHueColorMap" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtHueColorMap \- \fBQwtHueColorMap\fP varies the hue value of the HSV color model\&.  

.SH SYNOPSIS
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.PP
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\fC#include <qwt_color_map\&.h>\fP
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Inherits \fBQwtColorMap\fP\&.
.SS "Public Member Functions"

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.RI "\fBQwtHueColorMap\fP (\fBQwtColorMap::Format\fP=\fBQwtColorMap::RGB\fP)"
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.RI "Constructor\&. "
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.RI "virtual \fB~QwtHueColorMap\fP ()"
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.RI "Destructor\&. "
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.RI "void \fBsetHueInterval\fP (int \fBhue1\fP, int \fBhue2\fP)"
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.RI "void \fBsetSaturation\fP (int \fBsaturation\fP)"
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.RI "Set the the saturation coordinate\&. "
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.RI "void \fBsetValue\fP (int \fBvalue\fP)"
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.RI "Set the the value coordinate\&. "
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.RI "void \fBsetAlpha\fP (int \fBalpha\fP)"
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.RI "Set the the alpha coordinate\&. "
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.RI "int \fBhue1\fP () \fBconst\fP"
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.RI "int \fBhue2\fP () \fBconst\fP"
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.RI "int \fBsaturation\fP () \fBconst\fP"
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.RI "int \fBvalue\fP () \fBconst\fP"
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.RI "int \fBalpha\fP () \fBconst\fP"
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.RI "virtual QRgb \fBrgb\fP (\fBconst\fP \fBQwtInterval\fP &, double \fBvalue\fP) \fBconst\fP override"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
\fBQwtHueColorMap\fP varies the hue value of the HSV color model\&. 

\fBQwtHueColorMap\fP can be used to set up a color map easily, that runs cyclic over all colors\&. Each cycle has 360 different steps\&.
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The values for value and saturation are in the range of 0 to 255 and doesn't depend on the data value to be mapped\&.
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\fBSee also\fP
.RS 4
\fBQwtSaturationValueColorMap\fP 
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Definition at line 180 of file qwt_color_map\&.h\&.
.SH "Constructor & Destructor Documentation"
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.SS "QwtHueColorMap::QwtHueColorMap (\fBQwtColorMap::Format\fP format = \fC\fBQwtColorMap::RGB\fP\fP)\fC [explicit]\fP"

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Constructor\&. The hue interval is initialized by 0 to 359\&. All other coordinates are set to 255\&.
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\fBParameters\fP
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\fIformat\fP Format of the color map
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\fBSee also\fP
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\fBsetHueInterval()\fP, \fBsetSaturation()\fP, \fBsetValue()\fP, \fBsetValue()\fP 
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Definition at line 723 of file qwt_color_map\&.cpp\&.
.SH "Member Function Documentation"
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.SS "int QwtHueColorMap::alpha () const"

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\fBReturns\fP
.RS 4
Alpha coordinate 
.RE
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\fBSee also\fP
.RS 4
\fBsetAlpha()\fP 
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Definition at line 856 of file qwt_color_map\&.cpp\&.
.SS "int QwtHueColorMap::hue1 () const"

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\fBReturns\fP
.RS 4
First hue coordinate 
.RE
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\fBSee also\fP
.RS 4
\fBsetHueInterval()\fP 
.RE
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.PP
Definition at line 820 of file qwt_color_map\&.cpp\&.
.SS "int QwtHueColorMap::hue2 () const"

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\fBReturns\fP
.RS 4
Second hue coordinate 
.RE
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\fBSee also\fP
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\fBsetHueInterval()\fP 
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Definition at line 829 of file qwt_color_map\&.cpp\&.
.SS "QRgb QwtHueColorMap::rgb (\fBconst\fP \fBQwtInterval\fP & interval, double value) const\fC [override]\fP, \fC [virtual]\fP"
Map a value of a given interval into a RGB value
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\fBParameters\fP
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\fIinterval\fP Range for all values 
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\fIvalue\fP Value to map into a RGB value
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\fBReturns\fP
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RGB value for value 
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Implements \fBQwtColorMap\fP\&.
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Definition at line 869 of file qwt_color_map\&.cpp\&.
.SS "int QwtHueColorMap::saturation () const"

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\fBReturns\fP
.RS 4
Saturation coordinate 
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\fBSee also\fP
.RS 4
\fBsetSaturation()\fP 
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.PP
Definition at line 838 of file qwt_color_map\&.cpp\&.
.SS "void QwtHueColorMap::setAlpha (int alpha)"

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Set the the alpha coordinate\&. alpha needs to be in the range 0 to 255, where 255 means opaque and 0 means transparent\&.
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\fBParameters\fP
.RS 4
\fIalpha\fP Alpha coordinate
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\fBSee also\fP
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\fBalpha()\fP 
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Definition at line 805 of file qwt_color_map\&.cpp\&.
.SS "void QwtHueColorMap::setHueInterval (int hue1, int hue2)"
Set the interval for the hue coordinate
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hue1/hue2 need to be positive number and can be > 360 to define cycles\&. F\&.e\&. 420 to 240 defines a map yellow/red/magenta/blue\&.
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\fBParameters\fP
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\fIhue1\fP First hue coordinate 
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\fIhue2\fP Second hue coordinate
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\fBSee also\fP
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\fBhue1()\fP, \fBhue2()\fP 
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Definition at line 746 of file qwt_color_map\&.cpp\&.
.SS "void QwtHueColorMap::setSaturation (int saturation)"

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Set the the saturation coordinate\&. saturation needs to be in the range 0 to 255,
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\fBParameters\fP
.RS 4
\fIsaturation\fP Saturation coordinate
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\fBSee also\fP
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\fBsaturation()\fP 
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Definition at line 764 of file qwt_color_map\&.cpp\&.
.SS "void QwtHueColorMap::setValue (int value)"

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Set the the value coordinate\&. value needs to be in the range 0 to 255,
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\fBParameters\fP
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\fIvalue\fP Value coordinate
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\fBSee also\fP
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\fBvalue()\fP 
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Definition at line 784 of file qwt_color_map\&.cpp\&.
.SS "int QwtHueColorMap::value () const"

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\fBReturns\fP
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Value coordinate 
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\fBSee also\fP
.RS 4
\fBsetValue()\fP 
.RE
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Definition at line 847 of file qwt_color_map\&.cpp\&.

.SH "Author"
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.