----

/** \file msg_listen.h Plugin message listening helper class. */

#include <functional>
#include <memory>
#include <wx/event.h>

#include "ocpn_plugin.h"

/**
* Helper class for setting up message listening in plugins.
* Example  usage:
*     MsgListener<NMEA0183Id> listener
*     ...
*     auto action = [&] (ObservedEvt ev) {
*            auto payload = GetN0183Payload(NMEA0183Id("GGA"),  ev);
*            ...
*     };
*     listener.Init(NMEA0183Id("GGA"), action);
*/
template(typename T)
class MsgListener : public wxEvtHandler {
public:

  MsgListener() = default;

  void Init(T id,
            std::function<void(ObservedEvt& ev)> action) {
    const wxEventTypeTag<ObservedEvt> EvtObs(wxNewEventType());
    m_listener = GetListener(id, EvtObs, this);
    Bind(EvtObs, action);
  }

private:
  std::shared_ptr<ObservableListener> m_listener;
};
----
