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Qwt User's Guide
6.0.2
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#include <qwt_sampling_thread.h>
Public Slots | |
| void | setInterval (double interval) |
| void | stop () |
Public Member Functions | |
| virtual | ~QwtSamplingThread () |
| double | elapsed () const |
| double | interval () const |
Protected Member Functions | |
| QwtSamplingThread (QObject *parent=NULL) | |
| virtual void | run () |
| virtual void | sample (double elapsed)=0 |
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 QwtPlotSeriesItem on a QwtPlot widget.
QwtSamplingThread starts a thread calling perodically sample(), to collect and store ( or emit ) a single sample.
| double QwtSamplingThread::elapsed | ( | ) | const |
| double QwtSamplingThread::interval | ( | ) | const |
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protectedvirtual |
Loop collecting samples started from QThread::start()
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protectedpure virtual |
Collect a sample
| elapsed | Time since the thread was started in miliseconds |
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slot |
Change the interval (in ms), when sample() is called. The default interval is 1000.0 ( = 1s )
| interval | Interval |
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slot |
Terminate the collecting thread
1.8.1