Observer.h

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#pragma once
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

//----- Included files ---------------------------------------------------------

#include <xmscore/misc/boost_defines.h>

//----- Forward declarations ---------------------------------------------------

//----- Namespace declaration --------------------------------------------------

//----- Constants / Enumerations -----------------------------------------------

//----- Structs / Classes ------------------------------------------------------
namespace xms
{
class ObserverT;
class Observer
{
  friend ObserverT; 
public:
  Observer();
  virtual ~Observer();

  bool ProgressStatus(double a_percentComplete);
  void BeginOperationString(const std::string& a_operation);
  void EndOperation();
  void UpdateMessage(const std::string& a_message);

private:
  virtual void OnProgressStatus(double a_percentComplete) = 0;
  virtual void OnBeginOperationString(const std::string& a_operation);
  virtual void OnEndOperation();
  virtual void OnUpdateMessage(const std::string& a_message);
  virtual void TimeRemainingInSeconds(double a_remainingSeconds);
  virtual void TimeElapsedInSeconds(double a_elapsedSeconds);

  class impl;
  BSHP<impl> m_p; 
};                // class Observer

} // namespace xms

//----- Function prototypes ----------------------------------------------------