unit1.~pas

本光盘是《Delphi 7应用教程》一书的配套光盘

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Image1: TImage;
    Timer1: TTimer;
    procedure FormCreate(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
  Var
     Num:Integer;

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  Num:=0;
  Image1.Stretch :=True;   //使照片充满整个图像框
  Timer1.Interval:=500;  // 每隔0.5秒发生一次Timer事件
  Timer1.Enabled :=True;  //'启动计时器控件
end;                                           

procedure TForm1.Timer1Timer(Sender: TObject);
var
   xh:Integer;
   CurDir,PicFile:string;
begin
   XH := Num Mod 8 ;//得到要展示的照片文件的序号
   GetDir(0,CurDir);
   PicFile:= CurDir+'\tzy'+inttostr(XH+1)+'.jpg';//形成要展示文件的文件名
   Image1.Picture.LoadFromFile (PicFile);//展示文件
   Num := Num + 1;  //准备展示下一张照片

end;

end.