<html><!-- Created using the cpp_pretty_printer from the dlib C++ library. See http://dlib.net for updates. --><head><title>dlib C++ Library - timer_ex.cpp</title></head><body bgcolor='white'><pre> <font color='#009900'>// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt </font> <font color='#009900'>/* This is an example illustrating the use of the timer object from the dlib C++ Library. The timer is an object that calls some user specified member function at regular intervals from another thread. */</font> <font color='#0000FF'>#include</font> <font color='#5555FF'><</font>dlib<font color='#5555FF'>/</font>timer.h<font color='#5555FF'>></font> <font color='#0000FF'>#include</font> <font color='#5555FF'><</font>dlib<font color='#5555FF'>/</font>misc_api.h<font color='#5555FF'>></font> <font color='#009900'>// for dlib::sleep </font><font color='#0000FF'>#include</font> <font color='#5555FF'><</font>iostream<font color='#5555FF'>></font> <font color='#0000FF'>using</font> <font color='#0000FF'>namespace</font> dlib; <font color='#0000FF'>using</font> <font color='#0000FF'>namespace</font> std; <font color='#009900'>// ---------------------------------------------------------------------------------------- </font> <font color='#0000FF'>class</font> <b><a name='timer_example'></a>timer_example</b> <b>{</b> <font color='#0000FF'>public</font>: <font color='#0000FF'><u>void</u></font> <b><a name='action_function'></a>action_function</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>// print out a message so we can see that this function is being triggered </font> cout <font color='#5555FF'><</font><font color='#5555FF'><</font> "<font color='#CC0000'>action_function() called</font>" <font color='#5555FF'><</font><font color='#5555FF'><</font> endl; <b>}</b> <b>}</b>; <font color='#009900'>// ---------------------------------------------------------------------------------------- </font> <font color='#0000FF'><u>int</u></font> <b><a name='main'></a>main</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <b>{</b> timer_example e; <font color='#009900'>// Here we construct our timer object. It needs two things. The second argument is </font> <font color='#009900'>// the member function it is going to call at regular intervals and the first argument </font> <font color='#009900'>// is the object instance it will call that member function on. </font> timer<font color='#5555FF'><</font>timer_example<font color='#5555FF'>></font> <font color='#BB00BB'>t</font><font face='Lucida Console'>(</font>e, <font color='#5555FF'>&</font>timer_example::action_function<font face='Lucida Console'>)</font>; <font color='#009900'>// Set the timer object to trigger every second </font> t.<font color='#BB00BB'>set_delay_time</font><font face='Lucida Console'>(</font><font color='#979000'>1000</font><font face='Lucida Console'>)</font>; <font color='#009900'>// Start the timer. It will start calling the action function 1 second from this call </font> <font color='#009900'>// to start. </font> t.<font color='#BB00BB'>start</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; <font color='#009900'>// Sleep for 10 seconds before letting the program end. </font> dlib::<font color='#BB00BB'>sleep</font><font face='Lucida Console'>(</font><font color='#979000'>10000</font><font face='Lucida Console'>)</font>; <font color='#009900'>// The timer will destruct itself properly and stop calling the action_function. </font><b>}</b> <font color='#009900'>// ---------------------------------------------------------------------------------------- </font> </pre></body></html>