10 #ifndef QWT_SAMPLING_THREAD_H 
   11 #define QWT_SAMPLING_THREAD_H 
   13 #include "qwt_global.h" 
   35     double interval() 
const;
 
   36     double elapsed() 
const;
 
   39     void setInterval( 
double interval );
 
   45     virtual void run() QWT_OVERRIDE;
 
   55     virtual void sample( 
double elapsed ) = 0;
 
A thread collecting samples at regular intervals.
virtual void sample(double elapsed)=0