Author: William Gerbert

Paint the form with a tiled bitmap

Answer:

You may use this code to accomplish it:


1   type
2     TForm1 = class(TForm)
3       procedure FormCreate(Sender: TObject);
4       procedure FormPaint(Sender: TObject);
5     private
6       { private declarations }
7     public
8       { public declarations }
9       destructor Destroy; override;
10    end;
11  
12  var
13    Form1: TForm1;
14    Bitmap: TBitmap;
15  
16    ..
17  
18  procedure TForm1.FormCreate(Sender: TObject);
19  begin
20    Bitmap := TBitmap.Create;
21    Bitmap.LoadFromFile('C:\WINDOWS\cars.BMP');
22  end;
23  
24  destructor TForm.Destroy;
25  begin
26    inherited;
27    Bitmap.Free;
28  end;
29  
30  procedure TForm1.FormPaint(Sender: TObject);
31  var
32    X, Y, W, H: LongInt;
33  begin
34    with Bitmap do
35    begin
36      W := Width;
37      H := Height;
38    end;
39    Y := 0;
40    while Y < Height do
41    begin
42      X := 0;
43      while X < Width do
44      begin
45        Canvas.Draw(X, Y, Bitmap);
46        Inc(X, W);
47      end;
48      Inc(Y, H);
49    end;
50  end;