unit1.~pas

走马灯的源代码

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;
type
  TForm1 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    Timer1: TTimer;
    procedure Button1Click(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    Rect: TRect;
    TextWidth: Integer;
  end;
var
  Form1: TForm1;
implementation 
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
  Label1.Caption := Edit1.Text;
  TextWidth := Label1.Canvas.TextWidth(Label1.Caption);
Label1.Caption := '';
  Timer1.Enabled := True;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
begin
  label1.Left:=label1.Left-10;   
  if   label1.Left<=Form1.ClientRect.Left   then   
          label1.Left:=form1.ClientRect.Right;
  end;

end.