#ifndef Progress_First
#define Progress_First
#ifdef __GNUG__
#pragma interface
#endif

#include "Object.h"

class ProgressTimeoutHandler;
class Timer;

//---- Progress ----------------------------------------------------------------

class Progress : public Object {
public:
	MetaDef(Progress);
	Progress();

	void Start(const char *message, long mx, bool enable_abort= TRUE);
		// start progress indicator with message and max tick count mx
	virtual void SetMessage(const char *message);
		// change indicator message on-the-fly
	void SetMax(long mx);
		// set maximum tick
	bool Tick(long curr);
		// set absolut tick
	bool Inc(long inc);
		// increment tick; 
	bool Stop();
		// stop progress (normal end); returns same as WasAborted()

	void Abort();
		// abort progress (abnormal end)
	void EnableAbort(bool stop);
		// allow/disallow aborting; (e.g. show a "stop" button)
	bool WasAborted();
	

protected:
	// subclass responsibility
	virtual void DoSetUp();
	virtual bool DoSetVal();
	virtual void DoAbort(bool skiptoend);
	virtual void DoEnableAbort(bool stop);
	virtual void DoSetMessage(const char *message);

protected:
friend ProgressTimeoutHandler;
	long curr, max;
	bool timeout, aborted;
	Timer *alarmhandler;

	static bool inProgress;
};

extern Progress *gProgress;

inline void Progress::SetMax(long mx)
	{ max= mx; }

inline bool Progress::Tick(long val)
	{ curr= val; return timeout ? DoSetVal() : FALSE; }

inline bool Progress::Inc(long inc)
	{ curr+= inc; return timeout ? DoSetVal() : FALSE; }

inline bool Progress::WasAborted()
	{ return aborted; }

#endif