本例效果圖:
代碼文件:unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs;
type
TForm1 = class(TForm)
procedure FormPaint(Sender: TObject);
procedure FormClick(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ,GDIPAPI;
var
pc: PChar = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
num: Integer;
procedure TForm1.FormPaint(Sender: TObject);
var
g: TGPGraphics;
b: TGPBrush;
font: TGPFont;
begin
g := TGPGraphics.Create(Canvas.Handle);
b := TGPSolidBrush.Create(aclGoldenrod);
font := TGPFont.Create('Arial Black', 18, FontStyleRegular);
{參數 2 為輸出字符的個數, -1 表示全部輸出}
g.DrawString(pc, num, font, MakePoint(5.0, 5), b);
b.Free;
font.Free;
g.Free;
end;
procedure TForm1.FormClick(Sender: TObject);
var
i,n: Integer;
begin
n := Length(pc);
num := 0;
for i:= 1 to n do
begin
num := i;
Repaint;
Sleep(100);
Application.ProcessMessages;
end;
num := -1;
for i:= 1 to Length(pc) do
begin
Inc(pc);
Repaint;
Sleep(100);
Application.ProcessMessages;
end;
Dec(pc,n);
end;
end.
窗體文件:object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 42
ClientWidth = 501
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
Position = poDesktopCenter
OnClick = FormClick
OnPaint = FormPaint
PixelsPerInch = 96
TextHeight = 13
end
