// -*- mode: c++ -*- 
//
// Author:    Christian Holm <cholm@nbi.dk>
// Date:      Thu May 11 22:06:15 2000
// Copyrigth: 2000 Brahms Collaboration 

#ifndef ROOT_TAppOption
#define ROOT_TAppOption

class TString;
class TObject;

class TAppOption : public TObject 
{
protected:
  Char_t        fShortName;
  TString       fLongName;
  TString       fHelpString;
public:
  TAppOption(Char_t        sName,
	      const Char_t* lName,
	      const Char_t* helpString);
  const Char_t* GetName(void)       const { return fLongName.Data(); }
  const Char_t  GetShortName(void)  const { return fShortName; }
  const Char_t* GetLongName(void)   const { return fLongName.Data(); }
  const Char_t* GetHelpString(void) const { return fHelpString.Data(); }

  virtual Bool_t        SetValue(const Char_t* value) = 0;
  virtual const Char_t* GetValue(void) const = 0;
  virtual Bool_t        NeedValue(void) const = 0;

  Int_t   Compare(TObject* o);
  ULong_t Hash(void);
  Bool_t  IsSortable(void) const { return kTRUE; }

  ClassDef(TAppOption,0) // Application option ABC 
}
;

class TAppIntOption : public TAppOption 
{
private:
  Int_t fValue;
public:
  TAppIntOption(Char_t        sName, 
		 const Char_t* lName, 
		 const Char_t* helpString,
		 const Int_t   defualtValue=0) 
    : TAppOption(sName,lName,helpString), 
    fValue(defualtValue) {}
  operator Int_t () const { return fValue; }
  const Char_t*  GetValue(void) const;
  Bool_t         SetValue(const Char_t* strValue);
  Bool_t         NeedValue(void) const { return kTRUE; }
		 
  ClassDef(TAppIntOption,0) // Application option class for intergers
}
;

class TAppFloatOption : public TAppOption 
{
private:
  Float_t fValue;
public:
  TAppFloatOption(Char_t        sName, 
		   const Char_t* lName, 
		   const Char_t* helpString,
		   const Float_t defualtValue=0) 
    : TAppOption(sName,lName,helpString), 
    fValue(defualtValue) {}
  operator Float_t () const { return fValue; }
  const Char_t*    GetValue(void) const;
  Bool_t           SetValue(const Char_t* strValue);
  Bool_t           NeedValue(void) const { return kTRUE; }
		 
  ClassDef(TAppFloatOption,0) // Application option for floating point
}
;

class TAppBoolOption : public TAppOption 
{
private:
  Bool_t fValue;
public:
  TAppBoolOption(Char_t        sName, 
		  const Char_t* lName, 
		  const Char_t* helpString,
		  const Bool_t  defualtValue=0) 
    : TAppOption(sName,lName,helpString), 
    fValue(defualtValue) {}
  operator Bool_t () const { return fValue; }
  const Char_t*   GetValue(void) const;
  Bool_t          SetValue(const Char_t* strValue);
  Bool_t          NeedValue(void) const { return kFALSE; }
		 
  ClassDef(TAppBoolOption,0) // Application option booleans
}
;

class TAppStringOption : public TAppOption 
{
private:
  TString fValue;
public:
  TAppStringOption(Char_t        sName, 
		    const Char_t* lName, 
		    const Char_t* helpString,
		    const Char_t* defualtValue=0)
    : TAppOption(sName,lName,helpString),
    fValue(defualtValue) {} 
  operator const Char_t* () const { return fValue.Data(); }
  const Char_t*          GetValue(void) const;
  Bool_t                 SetValue(const Char_t* strValue);
  Bool_t                 NeedValue(void) const { return kTRUE; }
		 
  ClassDef(TAppStringOption,0) // Application option strings
}
;
#endif