private with

    FLTK.Images.RGB.PNG,
    Ada.Command_Line,
    Ada.Directories;


package Things is


    type Thing is tagged private;


    Nothing : constant Thing;


    Man      : constant Thing;
    Treasure : constant Thing;


    procedure Draw
           (This : in Thing;
            X, Y : in Integer);


    function "="
           (A, B : in Thing)
        return Boolean;


private


    type Thing is tagged record
        Self_Image : access FLTK.Images.RGB.PNG.PNG_Image;
    end record;


    Origin : String := Ada.Directories.Containing_Directory
        (Ada.Directories.Full_Name (Ada.Command_Line.Command_Name));
    Image_Dir : String := Origin & "/../share/sokoban/img";


    Man_Image : aliased FLTK.Images.RGB.PNG.PNG_Image :=
        FLTK.Images.RGB.PNG.Create (Image_Dir & "/man.png");
    Treasure_Image : aliased FLTK.Images.RGB.PNG.PNG_Image :=
        FLTK.Images.RGB.PNG.Create (Image_Dir & "/treasure.png");


    Nothing : constant Thing :=
        (Self_Image => null);


    Man : constant Thing :=
        (Self_Image => Man_Image'Access);
    Treasure : constant Thing :=
        (Self_Image => Treasure_Image'Access);


end Things;