.TH "QwtLog10ScaleEngine" 3 "Tue Nov 20 2012" "Version 5.2.3" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtLog10ScaleEngine \- 
.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_scale_engine\&.h>\fP
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Inherits \fBQwtScaleEngine\fP\&.
.SS "Public Member Functions"

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.RI "virtual void \fBautoScale\fP (int maxSteps, double &x1, double &x2, double &stepSize) const "
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.ti -1c
.RI "virtual \fBQwtScaleDiv\fP \fBdivideScale\fP (double x1, double x2, int numMajorSteps, int numMinorSteps, double stepSize=0\&.0) const "
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.RI "virtual \fBQwtScaleTransformation\fP * \fBtransformation\fP () const "
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.SS "Protected Member Functions"

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.RI "\fBQwtDoubleInterval\fP \fBlog10\fP (const \fBQwtDoubleInterval\fP &) const "
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.RI "\fBQwtDoubleInterval\fP \fBpow10\fP (const \fBQwtDoubleInterval\fP &) const "
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
A scale engine for logarithmic (base 10) scales\&. 

The step size is measured in \fIdecades\fP and the major step size will be adjusted to fit the pattern $\left\{ 1,2,3,5\right\} \cdot 10^{n}$, where n is a natural number including zero\&.
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\fBWarning:\fP
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the step size as well as the margins are measured in \fIdecades\fP\&. 
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.SH "Member Function Documentation"
.PP 
.SS "void QwtLog10ScaleEngine::autoScale (intmaxNumSteps, double &x1, double &x2, double &stepSize) const\fC [virtual]\fP"
Align and divide an interval
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\fBParameters:\fP
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\fImaxNumSteps\fP Max\&. number of steps 
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\fIx1\fP First limit of the interval (In/Out) 
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\fIx2\fP Second limit of the interval (In/Out) 
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\fIstepSize\fP Step size (Out)
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\fBSee also:\fP
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\fBQwtScaleEngine::setAttribute()\fP 
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Implements \fBQwtScaleEngine\fP\&.
.SS "\fBQwtScaleDiv\fP QwtLog10ScaleEngine::divideScale (doublex1, doublex2, intmaxMajSteps, intmaxMinSteps, doublestepSize = \fC0\&.0\fP) const\fC [virtual]\fP"

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Calculate a scale division\&. \fBParameters:\fP
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\fIx1\fP First interval limit 
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\fIx2\fP Second interval limit 
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\fImaxMajSteps\fP Maximum for the number of major steps 
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\fImaxMinSteps\fP Maximum number of minor steps 
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\fIstepSize\fP Step size\&. If stepSize == 0, the scaleEngine calculates one\&.
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\fBSee also:\fP
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QwtScaleEngine::stepSize(), QwtLog10ScaleEngine::subDivide() 
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.PP
Implements \fBQwtScaleEngine\fP\&.
.SS "\fBQwtDoubleInterval\fP QwtLog10ScaleEngine::log10 (const \fBQwtDoubleInterval\fP &interval) const\fC [protected]\fP"
Return the interval [log10(interval\&.minValue(), log10(interval\&.maxValue] 
.SS "\fBQwtDoubleInterval\fP QwtLog10ScaleEngine::pow10 (const \fBQwtDoubleInterval\fP &interval) const\fC [protected]\fP"
Return the interval [pow10(interval\&.minValue(), pow10(interval\&.maxValue] 
.SS "\fBQwtScaleTransformation\fP * QwtLog10ScaleEngine::transformation () const\fC [virtual]\fP"
Return a transformation, for logarithmic (base 10) scales 
.PP
Implements \fBQwtScaleEngine\fP\&.

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