.TH "QwtSamplingThread" 3 "Fri Apr 15 2011" "Version 6.0.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtSamplingThread \- 
.PP
A thread collecting samples at regular intervals.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_sampling_thread.h>\fP
.SS "Public Slots"

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.RI "void \fBsetInterval\fP (double interval)"
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.RI "void \fBstop\fP ()"
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.SS "Public Member Functions"

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.RI "virtual \fB~QwtSamplingThread\fP ()"
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.RI "double \fBinterval\fP () const "
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.RI "double \fBelapsed\fP () const "
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.SS "Protected Member Functions"

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.RI "\fBQwtSamplingThread\fP (QObject *parent=NULL)"
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.RI "virtual void \fBrun\fP ()"
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.RI "virtual void \fBsample\fP (double elapsed)=0"
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.SH "Detailed Description"
.PP 
A thread collecting samples at regular intervals. 

Contiounous signals are converted into a discrete signal by collecting samples at regular intervals. A discrete signal can be displayed by a \fBQwtPlotSeriesItem\fP on a \fBQwtPlot\fP widget.
.PP
\fBQwtSamplingThread\fP starts a thread calling perodically \fBsample()\fP, to collect and store ( or emit ) a single sample.
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\fBSee also:\fP
.RS 4
\fBQwtPlotCurve\fP, \fBQwtPlotSeriesItem\fP 
.RE
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.SH "Constructor & Destructor Documentation"
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.SS "QwtSamplingThread::~QwtSamplingThread ()\fC [virtual]\fP"
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Destructor. 
.SS "QwtSamplingThread::QwtSamplingThread (QObject *parent = \fCNULL\fP)\fC [explicit, protected]\fP"
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Constructor. 
.SH "Member Function Documentation"
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.SS "double QwtSamplingThread::elapsed () const"\fBReturns:\fP
.RS 4
Time (in ms) since the thread was started 
.RE
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\fBSee also:\fP
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QThread::start(), \fBrun()\fP 
.RE
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.SS "double QwtSamplingThread::interval () const"\fBReturns:\fP
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Interval (in ms), between 2 calls of \fBsample()\fP 
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\fBSee also:\fP
.RS 4
\fBsetInterval()\fP 
.RE
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.SS "void QwtSamplingThread::run ()\fC [protected, virtual]\fP"Loop collecting samples started from QThread::start() 
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\fBSee also:\fP
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\fBstop()\fP 
.RE
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.SS "virtual void QwtSamplingThread::sample (doubleelapsed)\fC [protected, pure virtual]\fP"Collect a sample
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\fBParameters:\fP
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\fIelapsed\fP Time since the thread was started in miliseconds 
.RE
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.SS "void QwtSamplingThread::setInterval (doubleinterval)\fC [slot]\fP"Change the interval (in ms), when \fBsample()\fP is called. The default interval is 1000.0 ( = 1s )
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\fBParameters:\fP
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\fIinterval\fP Interval 
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\fBSee also:\fP
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\fBinterval()\fP 
.RE
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.SS "void QwtSamplingThread::stop ()\fC [slot]\fP"Terminate the collecting thread 
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\fBSee also:\fP
.RS 4
QThread::start(), \fBrun()\fP 
.RE
.PP


.SH "Author"
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