unit main;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, Forms, Controls, Graphics, Dialogs, ExtCtrls, ubarcodes;

type
  
  { TMainForm }

  TMainForm = class(TForm)
    BarcodeQR: TBarcodeQR;
    Timer: TTimer;
    procedure FormCreate(Sender: TObject);
    procedure TimerTimer(Sender: TObject);
  private

  public

  end;

var
  MainForm: TMainForm;

implementation

{$R *.lfm}

{ TMainForm }

procedure TMainForm.TimerTimer(Sender: TObject);
var
  dt: TDateTime;
  sd, st: String;
begin           
  dt := Now();
  sd := FormatDateTime('dddddd', dt);
  st := FormatDateTime('hh:nn:ss', dt);
  Caption := 'QRClock: ' + sd + ' - ' + st;
  BarcodeQR.Text := sd + LineEnding + st;
end;

procedure TMainForm.FormCreate(Sender: TObject);
var
  w: Integer = 0;
  h: Integer = 0;
begin
  // Avoid switching to final form size while form is already visible
  TimerTimer(nil);
  BarcodeQR.GetPreferredSize(w, h);
  Width := w;
  Height := h;
end;

end.