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#include <iostream>
 
#include <vrpn_Button.h>
#include <vrpn_Analog.h>
 
void VRPN_CALLBACK vrpn_button_callback(void* user_data, vrpn_BUTTONCB button)
{
    std::cout << "Button ID : " << button.button << " / Button State : " << button.state << std::endl;
 
    if (button.button == 1)
    {
        *(bool*)user_data = false;
    }
}
 
int main(int argc, char** argv)
{
    /* flag used to stop the program execution */
    bool running = true;
 
    /* VRPN Button object */
    vrpn_Button_Remote* VRPNButton;
 
    /* Binding of the VRPN Button to a callback */
    VRPNButton = new vrpn_Button_Remote( "openvibe_vrpn_button@localhost" );
    VRPNButton->register_change_handler( &running, vrpn_button_callback );
 
  
 
    /* The main loop of the program, each VRPN object must be called in order to process data */
    while (running)
    {
        VRPNButton->mainloop();
    }
 
    return 0;
}