Uhr nach zeiteingabe läuft nicht

[Molzer]

Hallo!

Leider läuft meine uhr nicht nach eingabe meiner zeit...
dacht das macht der ttimer...

Delphi-Quellcode:

var mx,my:integer;
    hour, min, sec, msec  : byte;
    zeile: string;
    MyTime: TDatetime;
//Uhrzeit stellen-----------------------------------------------
Procedure TForm2.Zeit;
begin
  zeile := EdUhr.Text;
  try
    hour := StrtoInt(copy(zeile,1,2));
    Min := StrtoInt(copy(zeile,4,2));
    Sec := StrtoInt(copy(zeile,7,2));
  except
    ShowMessage('Falsche Eingabe');
    exit;
  end;
  if hour >= 24 then hour := 0;
  if Min >= 60 then Min := 0;
  if Sec >= 60 then Sec := 0;
  MyTime := EncodeTime(hour,min,sec,msec);
end;
procedure TForm2.Button1Click(Sender: TObject);
begin
Zeit;
end;
//digtaluhr und mitte bestimmen--------------------------------
procedure TForm2.Timer1Timer(Sender: TObject);
var winkel : real;
    x, y, r, i: Integer;
    hour, min, sec, msec : Word;
begin
 Form2.Caption:=TimeToStr(mytime);
 decodetime(mytime,hour,min,sec,msec);
 r:=((mx+my)div 4);
 mx := Width  div 2;
 my := Height div 2;
 refresh;
//Stundenstriche ------------------------------------------
with canvas do begin
  pen.Width:=3;
  pen.Color:=clblack;
  moveto(mx,my-width div 4);
  lineto(mx,my-width div 5);

  pen.Width:=3;
  pen.Color:=clblack;
  moveto(mx-width div 4,my);
  lineto(mx-width div 5,my);

  pen.Width:=3;
  pen.Color:=clblack;
  moveto(mx+width div 4,my);
  lineto(mx+width div 5,my);

  pen.Width:=3;
  pen.Color:=clblack;
  moveto(mx,my+width div 4);
  lineto(mx,my+width div 5);

// Sekundenzeiger------------------------------------------
 winkel:=sec* ((2*pi) / 60) - pi/2;
 x:=Trunc(cos(winkel)*r);
 y:=Trunc(sin(winkel)*r);
 x:=x+(mx);
 y:=y+(my);
 Canvas.Pen.Color:=clblack;
 Canvas.Pen.Width:=1;
 Canvas.MoveTo(mx,my);
 Canvas.LineTo(x,y);

//Minutenzeiger------------------------------------------
 winkel:=min* ((2*pi) / 60) - pi/2;
 x:=Trunc(cos(winkel)*r*0.9);
 y:=Trunc(sin(winkel)*r*0.9);
 x:=x+(mx);
 y:=y+(my);
 Canvas.Pen.Width:=2;
 Canvas.MoveTo(mx,my);
 Canvas.LineTo(x,y);

//Stundenzeiger------------------------------------------
 IF hour>12 THEN hour:=hour-12;
 winkel:=(hour*(2*pi) / 12) + (min*(2*pi) / 720) - pi/2;
 x:=Trunc(cos(winkel)*r*0.8);
 y:=Trunc(sin(winkel)*r*0.8);
 x:=x+(mx);
 y:=y+(my);
 Canvas.Pen.Width:=3;
 Canvas.MoveTo(mx,my);
 Canvas.LineTo(x,y);
end;
end;
end.