timer.h

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#pragma once
#include <cstdint>
#include <chrono>
#include <memory>
#include <xtd/event.h>
#include <xtd/event_handler.h>
#include "component.h"
 
namespace xtd {
  namespace forms {
    class forms_export_ timer final : public component {
    public:
      timer() = default;
 
      timer(const timer&) = delete;
      ~timer() {stop();}
 
      bool enabled() const {return enabled_;}
      void enabled(bool enabled);
 
      std::chrono::milliseconds interval() const {return std::chrono::milliseconds(interval_);}
      template<typename rep_t, typename period_t = std::ratio<1>>
      void interval(const std::chrono::duration<rep_t, period_t>& interval) {interval_milliseconds(static_cast<int32_t>(std::chrono::duration_cast<std::chrono::milliseconds>(interval).count()));}
 
      int32_t interval_milliseconds() const {return interval_;}
      void interval_milliseconds(int32_t interval);
 
      void start() {enabled(true);}
 
      void stop() {enabled(false);}
      
      event<timer, event_handler> tick;
 
    protected:
      void on_tick(const event_args& e);
      
    private:
      bool enabled_ = false;
      int32_t interval_ = 100;
      intptr_t handle_ = 0;
    };
  }
}