1:

Canvas.TextOut...                    

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:

procedure TMyScreenSaverForm.DoFrame;
const TitelFontSize=24; ResolutionX=1024;
var c1: TCanvas; iInc: Integer; 
begin
 iInc:=1;
 repeat
  s1:=UpperCase(s1);
  c1:=TCanvas.Create;
  c1.Handle:=Canvas.Handle;
  with c1.Font do begin
   Style:=[fsBold];
   Color:=clGreen;
   Name:='Verdana';
   Size:=Ceil((TitelFontSize*(4/(iInc+3)))*(Self.Width/ResolutionX));
   if c1.TextWidth(s1)>Self.Width*(60/100) then Size:=Round((Size * 60 * Self.Width)/(100 * c1.TextWidth(s1)));
  end;

  iY:=(Height div 2)-((Abs(c1.Font.Height)) div 2);
  Inc(iInc);
 until iY>0;

 sDraw:=s1;
 iStep:=Length(sDraw);
 Canvas.Font:=c1.Font;
 ShowChar.Enabled:=true;
 while ShowChar.Enabled and bRunning do begin
  Application.ProcessMessages;
  sleep(1);
 end;

 c1.Free;
end;                    

1:
2:
3:
4:
5:
6:
7:
8:
9:

procedure TMyScreenSaverForm.ShowCharTimer(Sender: TObject);
var iCenterX: Integer; sTmp: String;
begin
 Dec(iStep);
 sTmp:=Copy(sDraw,1,Length(sDraw)-iStep);
 iCenterX:=(Width div 2)-(Canvas.TextWidth(sTmp) div 2);
 Canvas.TextOut(iCenterX,iY,sTmp);
 if iStep<=0 then ShowChar.Enabled:=false;
end;                    

1:
2:
3:
4:
5:
6:
7:
8:

iStep:=Length(sDraw); // Fehler: Inkompatible Typen

sTmp:=Copy(sDraw,1,Length(sDraw)-iStep);// Fehler: Inkompatible Typen

Canvas.TextOut(iCenterX,iY,sTmp);// Inkompatible Typen: Integer und Singel

s1:=UpperCase(s1); //Undefinierter Bezeichner: s1
while Form1.Timer1.Enabled and bRunning do begin //Undefinierter Bezeichner: bRunning                    

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:

public
    { Public-Deklarationen }
  end;

var Form1: TForm1;
     iStep: Integer; s1,sDraw: String; bRunning: Boolean;

implementation

{$R *.DFM}                    

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls,Math;

type
  TForm1 = class(TForm)
    Timer1: TTimer;
    procedure Timer1Timer(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
    
  end;
var
  Form1: TForm1;
  Canvas : TCanvas;
  iStep: Integer; s1,sDraw: String; bRunning: Boolean;
  iy: Single;

implementation

{$R *.dfm}

procedure TMyScreenSaverForm.DoFrame;
const TitelFontSize=24; ResolutionX=1024; 
var c1: TCanvas; iInc: Integer; 
begin 
iInc:=1; 
repeat 
  s1:=UpperCase(s1); 
  c1:=TCanvas.Create; 
  c1.Handle:=Canvas.Handle; 
  with c1.Font do begin 
   Style:=[fsBold]; 
   Color:=clGreen; 
   Name:='Verdana'; 
   Size:=Ceil((TitelFontSize*(4/(iInc+3)))*(Self.Width/ResolutionX)); 
   if c1.TextWidth(s1)>Self.Width*(60/100) then Size:=Round((Size * 60 * Self.Width)/(100 * c1.TextWidth(s1))); 
  end; 

  iY:=(Height div 2)-((Abs(c1.Font.Height)) div 2); 
  Inc(iInc); 
until iY>0; 

sDraw:=s1; 
iStep:=Length(sDraw); 
Canvas.Font:=c1.Font; 
ShowChar.Enabled:=true; 
while ShowChar.Enabled and bRunning do begin 
  Application.ProcessMessages; 
  sleep(1); 
end; 

c1.Free; 
end;

procedure TForm1.Timer1Timer(Sender: TObject);
  var iCenterX: Integer; sTmp: String;
begin
Dec(iStep);
sTmp:=Copy(sDraw,1,Length(sDraw)-iStep);
iCenterX:=(Width div 2)-(Canvas.TextWidth(sTmp) div 2);
Canvas.TextOut(iCenterX,iY,sTmp);
if iStep<=0 then Form1.Timer1.Enabled:=false;
end;

end.                    

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:

unit Unit1;

interface 

uses 
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, 
  Dialogs, ExtCtrls,Math; 

type 
  TForm1 = class(TForm)
    Timer1: TTimer;
    procedure Timer1Timer(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    procedure DoFrame;
  public
    { Public-Deklarationen }
    
  end; 
var 
  Form1: TForm1;
  Canvas : TCanvas; 
  iY,iStep: Integer; s1,sDraw: String; bRunning: Boolean;

implementation 

{$R *.dfm} 

procedure TForm1.DoFrame;
const TitelFontSize=24; ResolutionX=1024; 
var c1: TCanvas; iInc: Integer; 
begin 
iInc:=1; 
repeat 
  s1:=UpperCase(s1); 
  c1:=TCanvas.Create; 
  c1.Handle:=Canvas.Handle; 
  with c1.Font do begin 
   Style:=[fsBold]; 
   Color:=clGreen; 
   Name:='Verdana'; 
   Size:=Ceil((TitelFontSize*(4/(iInc+3)))*(Self.Width/ResolutionX)); 
   if c1.TextWidth(s1)>Self.Width*(60/100) then Size:=Round((Size * 60 * Self.Width)/(100 * c1.TextWidth(s1))); 
  end;

  iY:=(Height div 2)-((Abs(c1.Font.Height)) div 2);
  Inc(iInc); 
until iY>0;

sDraw:=s1; 
iStep:=Length(sDraw);
Canvas.Font:=c1.Font; 
Timer1.Enabled:=true;
while Timer1.Enabled and bRunning do begin
  Application.ProcessMessages;
  sleep(1); 
end;

c1.Free; 
end;

procedure TForm1.Timer1Timer(Sender: TObject);
  var iCenterX: Integer; sTmp: String;
begin 
Dec(iStep);
sTmp:=Copy(sDraw,1,Length(sDraw)-iStep); 
iCenterX:=(Width div 2)-(Canvas.TextWidth(sTmp) div 2); 
Canvas.TextOut(iCenterX,iY,sTmp);
if iStep<=0 then Form1.Timer1.Enabled:=false; 
end; 

procedure TForm1.FormCreate(Sender: TObject);
begin
 s1:='Das ist mein Text!';
 DoFrame
end;

end.