unit Menu;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type
  TMenuForm = class(TForm)
    Button1: TButton;
    Button2: TButton;
    OpenDialog1: TOpenDialog;
    procedure Button1Click(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
  TRef = Record
      Topic: String[25];
      Author: String[20];
      Str: Integer;
      Date: String[10];
  End;

var
  MenuForm: TMenuForm;
  Ref: array of TRef;
  MyFile: File of TRef;
  n: Integer;

implementation

Uses
   Base, ChangeMenu, Add, DeleteRef, Change;

{$R *.dfm}

procedure TMenuForm.Button1Click(Sender: TObject);
begin
   BaseForm.Show;
   MenuForm.Hide;
end;

procedure TMenuForm.Button2Click(Sender: TObject);
var
   i: Integer;
begin
   i := 0;
   if OpenDialog1.Execute then
   begin
      AssignFile(MyFile, OpenDialog1.FileName);
      Reset(MyFile);
      SetLength(Ref, FileSize(MyFile));
      While not eof(MyFile) do
      begin
         Read(MyFile, Ref[i]);
         Inc(i);
      end;
      n := i;
   end;
   Button1.Enabled := True;
end;

procedure TMenuForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
   CanClose := MessageDlg('Вы уверены, что хотите выйти из программы?' +
      #10#13 + 'Все несохраненные данные будут утеряны.',
      mtConfirmation, [mbYes, mbNo], 0) = mrYes;
   ChangeMenuForm.Close;
   AddForm.Close;
   DeleteForm.Close;
   ChangeForm.Close;
end;

procedure TMenuForm.FormCreate(Sender: TObject);
begin
   n := 0;
end;

end.