unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComCtrls, ImgList,shellapi;

type
  TForm1 = class(TForm)
    ListView1: TListView;
    ImageListLarge: TImageList;
    OpenDialog1: TOpenDialog;
    Button2: TButton;
    ImageListSmall: TImageList;
    BvsIcon: TButton;
    BvsSmallIcon: TButton;
    BvsList: TButton;
    BvsReport: TButton;
    procedure Button2Click(Sender: TObject);
    procedure BvsIconClick(Sender: TObject);
    procedure BvsSmallIconClick(Sender: TObject);
    procedure BvsListClick(Sender: TObject);
    procedure BvsReportClick(Sender: TObject);
    procedure ListView1DblClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
    procedure WMDROPFILES_L(var Msg: TMessage);
    procedure LBWindowProc(var Message: TMessage);

  public
    { Public declarations }
    function GetFileSize(PFileName:string):int64;
    procedure SetListviewFile(PFileName,Paddreadme:string;Plistview:Tlistview) ;
    procedure ListViewAddIcon( IconHandle: HIcon;Plistview:Tlistview );
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
var
  LWindowProc: TWndMethod;

procedure TForm1.Button2Click(Sender: TObject); 
begin
 if OpenDialog1.Execute then
 begin
   //首先判斷文件是否存在;
   //加入打開日記的模塊中
   SetListviewFile(OpenDialog1.FileName,'手動(dòng)打開加入的文件!',listview1);
 end;
end;

function TForm1.GetFileSize(PFileName: string): int64;
var 
hd : integer;
begin
  try
   hd:=fileopen(PFileName,fmShareDenyNone);
   //要用  fmShareDenyNone，這樣別的程序也能打開文件，
   result:=fileseek(hd,0,2);
   fileclose(hd);
  except
   result:=0;
   fileclose(hd);
  end;
end;

procedure TForm1.ListViewAddIcon( IconHandle: HIcon;Plistview:Tlistview );
var
  aIcon: TIcon;
begin
  // 將圖標(biāo)加入ListView  //保留,加入函數(shù)庫(kù)
  if IconHandle <> 0 then
  try
    aIcon := TIcon.Create;
    aIcon.Handle := IconHandle;
    with Plistview.Items.Add do
    begin
      ImageIndex := Plistview.LargeImages.Count;
      Plistview.LargeImages.InsertIcon( ImageIndex, aIcon );
      Plistview.SmallImages.InsertIcon( ImageIndex, aIcon );
    end;

  finally
    FreeAndNIL( aIcon );
  end;
end;

procedure TForm1.SetListviewFile(PFileName, Paddreadme: string;Plistview:Tlistview);
var
 info : tshfileinfo;
 aIcon: TIcon;
 TMPID: integer;
begin
   fillchar(info,sizeof(tshfileinfo),0);
   shgetfileinfo(pchar(PFileName),0,info,sizeof(info),shgfi_displayname or shgfi_typename or
      shgfi_icon or shgfi_attributes);

   with Plistview do
   begin
     Items.Add;
     aIcon := TIcon.Create;   //圖標(biāo)處理
     aIcon.Handle := info.hicon;
     TMPID :=ListView1.Items.Count-1;
     Plistview.Items[TMPID].ImageIndex := Plistview.LargeImages.Count;
     Plistview.LargeImages.InsertIcon( Plistview.Items[TMPID].ImageIndex, aIcon );
     Plistview.SmallImages.InsertIcon( Plistview.Items[TMPID].ImageIndex, aIcon );
     Plistview.Items[TMPID].Caption := info.szdisplayname;//文件名
     Plistview.Items[TMPID].SubItems.add(Paddreadme);  //文件說明
     Plistview.Items[TMPID].SubItems.add(inttostr((GetFileSize(PFileName)+1023)div 1024)+'KB');//大小
     Plistview.Items[TMPID].SubItems.add(info.sztypename);  //文件類型
     Plistview.Items[TMPID].SubItems.add(FormatDateTime('YY-MM-DD HH:MM',FileDateToDateTime(FileAge(PFileName))));;//修改日期
     FreeAndNIL( aIcon );
  end;
end;

procedure TForm1.BvsIconClick(Sender: TObject);
begin
  ListView1.ViewStyle := vsIcon;
end;

procedure TForm1.BvsSmallIconClick(Sender: TObject);
begin
  ListView1.ViewStyle := vsSmallIcon;
end;

procedure TForm1.BvsListClick(Sender: TObject);
begin
 ListView1.ViewStyle := vsList;
end;

procedure TForm1.BvsReportClick(Sender: TObject);
begin
 ListView1.ViewStyle := vsReport;
end;



procedure TForm1.ListView1DblClick(Sender: TObject);
begin
  //雙擊或功能按鈕打開文件
 with sender as Tlistview do
 begin
  if selected= nil then exit;
  showmessage(inttostr(ListView1.ItemIndex));
 end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  LWindowProc := ListView1.WindowProc;
  ListView1.WindowProc := LBWindowProc;
  DragAcceptFiles(ListView1.Handle, True);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  ListView1.WindowProc := LWindowProc;
  DragAcceptFiles(ListView1.Handle, False);
end;

procedure TForm1.LBWindowProc(var Message: TMessage);
begin
  if Message.Msg = WM_DROPFILES then
    WMDROPFILES_l(Message);
  LWindowProc(Message);
end;

procedure TForm1.WMDROPFILES_L(var Msg: TMessage);
var
  pcFileName: PChar;
  i, iSize, iFileCount: integer;
begin
  pcFileName := '';
  iFileCount := DragQueryFile(Msg.wParam, $FFFFFFFF, pcFileName, 255);
  for i := 0 to iFileCount - 1 do
  begin
    iSize := DragQueryFile(Msg.wParam, i, nil, 0) + 1;
    pcFileName := StrAlloc(iSize);
    DragQueryFile(Msg.wParam, i, pcFileName, iSize);
    if FileExists(pcFileName) then
      SetListviewFile(pcFileName,'拖放加入的文件',listview1);
    StrDispose(pcFileName);
  end;
  DragFinish(Msg.wParam);
end;

end.