I want to create a timer in C++ and when a user presses a button, the program logs to an array the name of the button pressed and the time it was pressed.
Later, I want to be able to 'play back' what the user has done, eg. starting a timer, and simulating the button presses at the correctly logged time in the array.
Where would the best place to start be? Is there a timer function in C++?
You can do something like this
struct ButtonEvent{
EventInfo ei;
std::chrono::milliseconds time_stamp;
};
struct Recorder{
std::chrono::steady_clock::time_point start_time_;
std::deque<ButtonEvent> events_;
void StartRecording(){
start_time_ = std::chrono::steady_clock::now();
}
void HandleEvent(EventInfo e){
ButtonEvent be;
be.time_stamp = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - start_time_);
be.ei = e;
events_.push_back(be);
}
void Playback(){
std::chrono::steady_clock::time_point
playback_time =std::chrono::steady_clock::now() ;
while(events_.size()){
std::chrono::milliseconds ts =
std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - playback_time);
if(events_.front().time_stamp <= ts){
EventInfo e = events_.front().ei;
// playback the event
//...
events_.pop_front();
}
// Some kind of sleep if you want
}
}
};
Where EventInfo is some structure that has the info necessary to play back the event
See the answer to How to get current time and date in C++? . The standard library for time in C++ is ctime which comes from C. As that answer mentions, use boost if you want a more modern date time API http://www.boost.org/doc/libs/1_52_0/doc/html/date_time/date_time_io.html
