.TH "QwtLinearColorMap" 3 "Tue Nov 20 2012" "Version 5.2.3" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtLinearColorMap \- 
.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_color_map\&.h>\fP
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Inherits \fBQwtColorMap\fP\&.
.SS "Public Types"

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.RI "enum \fBMode\fP { \fBFixedColors\fP, \fBScaledColors\fP }"
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.SS "Public Member Functions"

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.RI "\fBQwtLinearColorMap\fP (\fBQwtColorMap::Format\fP=QwtColorMap::RGB)"
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.RI "\fBQwtLinearColorMap\fP (const QColor &from, const QColor &to, \fBQwtColorMap::Format\fP=QwtColorMap::RGB)"
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.RI "\fBQwtLinearColorMap\fP (const \fBQwtLinearColorMap\fP &)"
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.RI "virtual \fB~QwtLinearColorMap\fP ()"
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.RI "void \fBaddColorStop\fP (double value, const QColor &)"
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.RI "QColor \fBcolor1\fP () const "
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.RI "QColor \fBcolor2\fP () const "
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.RI "virtual unsigned char \fBcolorIndex\fP (const \fBQwtDoubleInterval\fP &, double value) const "
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.RI "QwtArray< double > \fBcolorStops\fP () const "
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.RI "virtual \fBQwtColorMap\fP * \fBcopy\fP () const "
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.RI "\fBMode\fP \fBmode\fP () const "
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.RI "\fBQwtLinearColorMap\fP & \fBoperator=\fP (const \fBQwtLinearColorMap\fP &)"
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.RI "virtual QRgb \fBrgb\fP (const \fBQwtDoubleInterval\fP &, double value) const "
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.RI "void \fBsetColorInterval\fP (const QColor &\fBcolor1\fP, const QColor &\fBcolor2\fP)"
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.RI "void \fBsetMode\fP (\fBMode\fP)"
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.SH "Detailed Description"
.PP 
\fBQwtLinearColorMap\fP 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 \fBmode()\fP == FixedColors the color is calculated from the next lower color stop\&. If \fBmode()\fP == ScaledColors the color is calculated by interpolating the colors of the adjacent stops\&. 
.SH "Member Enumeration Documentation"
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.SS "enum \fBQwtLinearColorMap::Mode\fP"
Mode of color map 
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\fBSee also:\fP
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\fBsetMode()\fP, \fBmode()\fP 
.RE
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.SH "Constructor & Destructor Documentation"
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.SS "QwtLinearColorMap::QwtLinearColorMap (\fBQwtColorMap::Format\fPformat = \fCQwtColorMap::RGB\fP)"
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\&.
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\fBParameters:\fP
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\fIformat\fP Preferred format of the color map 
.RE
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.SS "QwtLinearColorMap::QwtLinearColorMap (const QColor &color1, const QColor &color2, \fBQwtColorMap::Format\fPformat = \fCQwtColorMap::RGB\fP)"
Build a color map with two stops at 0\&.0 and 1\&.0\&.
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\fBParameters:\fP
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\fIcolor1\fP Color used for the minimum value of the value interval 
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\fIcolor2\fP Color used for the maximum value of the value interval 
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\fIformat\fP Preferred format of the coor map 
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.SH "Member Function Documentation"
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.SS "void QwtLinearColorMap::addColorStop (doublevalue, const QColor &color)"
Add a color stop
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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)
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\fBParameters:\fP
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\fIvalue\fP Value between [0\&.0, 1\&.0] 
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\fIcolor\fP Color stop 
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.SS "QColor QwtLinearColorMap::color1 () const"
\fBReturns:\fP
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the first color of the color range 
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\fBSee also:\fP
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\fBsetColorInterval()\fP 
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.SS "QColor QwtLinearColorMap::color2 () const"
\fBReturns:\fP
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the second color of the color range 
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\fBSee also:\fP
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\fBsetColorInterval()\fP 
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.SS "unsigned char QwtLinearColorMap::colorIndex (const \fBQwtDoubleInterval\fP &interval, doublevalue) const\fC [virtual]\fP"
Map a value of a given interval into a color index, between 0 and 255
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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 color index 
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Implements \fBQwtColorMap\fP\&.
.SS "QwtArray< double > QwtLinearColorMap::colorStops () const"
Return all positions of color stops in increasing order 
.SS "\fBQwtLinearColorMap::Mode\fP QwtLinearColorMap::mode () const"
\fBReturns:\fP
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Mode of the color map 
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\fBSee also:\fP
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\fBsetMode()\fP 
.RE
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.SS "QRgb QwtLinearColorMap::rgb (const \fBQwtDoubleInterval\fP &interval, doublevalue) const\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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Implements \fBQwtColorMap\fP\&.
.SS "void QwtLinearColorMap::setColorInterval (const QColor &color1, const QColor &color2)"
Set the color range
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Add stops at 0\&.0 and 1\&.0\&.
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\fBParameters:\fP
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\fIcolor1\fP Color used for the minimum value of the value interval 
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\fIcolor2\fP Color used for the maximum value of the value interval
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\fBSee also:\fP
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\fBcolor1()\fP, \fBcolor2()\fP 
.RE
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.SS "void QwtLinearColorMap::setMode (\fBMode\fPmode)"

.PP
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\&.
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\fBSee also:\fP
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\fBmode()\fP 
.RE
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.SH "Author"
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Generated automatically by Doxygen for Qwt User's Guide from the source code\&.