Waybar/src/modules/simpleclock.cpp

#include "modules/simpleclock.hpp"

#include <time.h>

waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
    : AButton(config, "clock", id, "{:%H:%M}", 60) {
  thread_ = [this] {
    dp.emit();
    auto now = std::chrono::system_clock::now();
    /* difference with projected wakeup time */
    auto diff = now.time_since_epoch() % interval_;
    /* sleep until the next projected time */
    thread_.sleep_for(interval_ - diff);
  };
}

auto waybar::modules::Clock::update() -> void {
  tzset();  // Update timezone information
  auto now = std::chrono::system_clock::now();
  auto localtime = fmt::localtime(std::chrono::system_clock::to_time_t(now));
  auto text = fmt::format(format_, localtime);
  label_->set_markup(text);

  if (tooltipEnabled()) {
    if (config_["tooltip-format"].isString()) {
      auto tooltip_format = config_["tooltip-format"].asString();
      auto tooltip_text = fmt::format(tooltip_format, localtime);
      label_->set_tooltip_text(tooltip_text);
    } else {
      label_->set_tooltip_text(text);
    }
  }
  // Call parent update
  AButton::update();
}