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// $Id$
//
//

#ifndef G4UIcmdWithADouble_H
#define G4UIcmdWithADouble_H 1

#include "G4UIcommand.hh"

// class description:
//  A concrete class of G4UIcommand. The command defined by this class
// takes a double value.
//  General information of G4UIcommand is given in G4UIcommand.hh.

class G4UIcmdWithADouble : public G4UIcommand
{
  public: // with description
    G4UIcmdWithADouble
    (const char * theCommandPath,G4UImessenger * theMessenger);
    //  Constructor. The command string with full path directory
    // and the pointer to the messenger must be given.
    static G4double GetNewDoubleValue(const char* paramString);
    //  Convert string which represents a double value to a double.
    void SetParameterName(const char * theName,G4bool omittable,
                          G4bool currentAsDefault=false);
    //  Set the parameter name. The name is used by the range checking.
    //  If "omittable" is set as true, the user of this command can ommit
    // the value when he/she applies the command. If "omittable" is false,
    // the user must supply a double value.
    //  "currentAsDefault" flag is valid only if "omittable" is true. If this
    // flag is true, the current value is used as the default value when the 
    // user ommit the parameter. If this flag is false, the value given by the 
    // next SetDefaultValue() method is used.
    void SetDefaultValue(G4double defVal);
    //  Set the default value of the parameter. This default value is used
    // when the user of this command ommits the parameter value, and
    // "ommitable" is true and "currentAsDefault" is false.
};

#endif
