.TH "QwtAlphaColorMap" 3 "Mon Aug 1 2011" "Version 5.2.2" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtAlphaColorMap \- 
.PP
\fBQwtAlphaColorMap\fP variies the alpha value of a color.  

.SH SYNOPSIS
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\fC#include <qwt_color_map.h>\fP
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Inherits \fBQwtColorMap\fP.
.SS "Public Types"

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.RI "enum \fBFormat\fP { \fBRGB\fP, \fBIndexed\fP }"
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.SS "Public Member Functions"

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.RI "QColor \fBcolor\fP () const "
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.RI "QColor \fBcolor\fP (const \fBQwtDoubleInterval\fP &, double value) const "
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.RI "virtual QVector< QRgb > \fBcolorTable\fP (const \fBQwtDoubleInterval\fP &) const "
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.RI "virtual \fBQwtColorMap\fP * \fBcopy\fP () const "
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.RI "\fBFormat\fP \fBformat\fP () const "
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.RI "\fBQwtAlphaColorMap\fP & \fBoperator=\fP (const \fBQwtAlphaColorMap\fP &)"
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.RI "\fBQwtAlphaColorMap\fP (const QColor &=QColor(Qt::gray))"
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.RI "\fBQwtAlphaColorMap\fP (const \fBQwtAlphaColorMap\fP &)"
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.RI "virtual QRgb \fBrgb\fP (const \fBQwtDoubleInterval\fP &, double value) const "
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.RI "void \fBsetColor\fP (const QColor &)"
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.RI "virtual \fB~QwtAlphaColorMap\fP ()"
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.SH "Detailed Description"
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\fBQwtAlphaColorMap\fP variies the alpha value of a color. 
.SH "Member Enumeration Documentation"
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.SS "enum \fBQwtColorMap::Format\fP\fC [inherited]\fP".IP "\(bu" 2
RGB
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 The map is intended to map into QRgb values.
.IP "\(bu" 2
Indexed
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 The map is intended to map into 8 bit values, that are indices into the color table.
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\fBSee also:\fP
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\fBrgb()\fP, \fBcolorIndex()\fP, \fBcolorTable()\fP 
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.SH "Constructor & Destructor Documentation"
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.SS "QwtAlphaColorMap::QwtAlphaColorMap (const QColor &color = \fCQColor(Qt::gray)\fP)"Constructor 
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\fBParameters:\fP
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\fIcolor\fP Color of the map 
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.SS "QwtAlphaColorMap::QwtAlphaColorMap (const \fBQwtAlphaColorMap\fP &other)"Copy constructor 
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\fBParameters:\fP
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\fIother\fP Other color map 
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.SS "QwtAlphaColorMap::~QwtAlphaColorMap ()\fC [virtual]\fP"
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Destructor. 
.SH "Member Function Documentation"
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.SS "QColor QwtAlphaColorMap::color () const"\fBReturns:\fP
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the color 
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\fBSee also:\fP
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\fBsetColor()\fP 
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.SS "QColor QwtColorMap::color (const \fBQwtDoubleInterval\fP &interval, doublevalue) const\fC [inline, inherited]\fP"Map a value into a color
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\fBParameters:\fP
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\fIinterval\fP Valid interval for values 
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\fIvalue\fP Value
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\fBReturns:\fP
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Color corresponding to value
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\fBWarning:\fP
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This method is slow for Indexed color maps. If it is necessary to map many values, its better to get the color table once and find the color using \fBcolorIndex()\fP. 
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.SS "QwtColorTable QwtColorMap::colorTable (const \fBQwtDoubleInterval\fP &interval) const\fC [virtual, inherited]\fP"Build and return a color map of 256 colors
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The color table is needed for rendering indexed images in combination with using \fBcolorIndex()\fP.
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\fBParameters:\fP
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\fIinterval\fP Range for the values 
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\fBReturns:\fP
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A color table, that can be used for a QImage 
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.SS "\fBQwtColorMap\fP * QwtAlphaColorMap::copy () const\fC [virtual]\fP"
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Clone the color map. 
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Implements \fBQwtColorMap\fP.
.SS "\fBQwtColorMap::Format\fP QwtColorMap::format () const\fC [inline, inherited]\fP"\fBReturns:\fP
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Intended format of the color map 
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\fBSee also:\fP
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\fBFormat\fP 
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.SS "\fBQwtAlphaColorMap\fP & QwtAlphaColorMap::operator= (const \fBQwtAlphaColorMap\fP &other)"Assignment operator 
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\fBParameters:\fP
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\fIother\fP Other color map 
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\fBReturns:\fP
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*this 
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.SS "QRgb QwtAlphaColorMap::rgb (const \fBQwtDoubleInterval\fP &interval, doublevalue) const\fC [virtual]\fP"
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Map a value of a given interval into a alpha value. alpha := (value - interval.minValue()) / interval.width();
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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, with an alpha value 
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Implements \fBQwtColorMap\fP.
.SS "void QwtAlphaColorMap::setColor (const QColor &color)"Set the color
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\fBParameters:\fP
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\fIcolor\fP Color 
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\fBSee also:\fP
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\fBcolor()\fP 
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.SH "Author"
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