(******
 * This file defines objects and operations in the VIEW menu
 *
 *
 *)
 
 

module View;
from Gradesheet import all;



op ShowColumn is 
  inputs: c:Column, g:GradeSheet;
  outputs: g':GradeSheet;
  description:(* Takes a Column that is currently hidden and shows it in the GradeSheet.
  *);
  precondition: ;
  postcondition: ;
end ShowColumn;


op HideColumn is 
  inputs: c:Column, g:GradeSheet;
  outputs: g':GradeSheet;
  description:(* 
  Takes a Column that is currently shown and hides it from view in GradeSheet.
  *);
  precondition:;
  postcondition: ;
end HideColumn;

end View;