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Explorer Shell通知

Tags: /超级猛料/Stream.File.流、文件和目录/目录/   Date Created:

下面是一个控件。

在资源管理器中修改、删除等操作之后，我的程序如何知道？实际上就是监视硬盘上面的文件及其变化。

这个还需要修改一些事件和属性

还可以动态增加监视的驱动器

似乎不可以用多个构件来监视不同的地方，不过我发现原来这样是可以的

   SHILCreatefromPath( PChar('c:\'), Addr(Pidl), Attributes);

   NotifyRecord^.pidlPath := Pidl;

   NotifyRecord^.bWatchSubtree := fWatch;

   SHILCreatefromPath( PChar('d:\'), Addr(Pidl), Attributes);

   NotifyRecord^.pidlPath := Pidl;

   NotifyRecord^.bWatchSubtree := fWatch;

----------------------------------------------------------------

不过，这个监视无法实现文件大小变化的处理，因为 ShellNotifyRegister 根本没有这样的参数可以使用。 我也不知道怎么办，你有办法吗？

{$IFNDEF VER80} {$IFNDEF VER90} {$IFNDEF VER93}

 {$DEFINE Delphi3orHigher}

{$ENDIF} {$ENDIF} {$ENDIF}

unit ShellNotifyCom;

interface

uses Windows, Messages, SysUtils, Classes, Controls, Forms, Dialogs,

 {$IFNDEF Delphi3orHigher} OLE2, {$ELSE} ActiveX, ComObj, {$ENDIF}

 ShlObj,Graphics;

type

 NOTIFYREGISTER = record

   pidlPath      : PItemIDList;

   bWatchSubtree : boolean;

 end;

 PNOTIFYREGISTER = ^NOTIFYREGISTER;

const

 SNM_SHELLNOTIFICATION = WM_USER +1;

 SHCNF_ACCEPT_INTERRUPTS      = $0001;

 SHCNF_ACCEPT_NON_INTERRUPTS  = $0002;

 SHCNF_NO_PROXY                = $8000;

type

 TNotificationEvent = (neAssociationChange, neAttributesChange,

   neFileChange, neFileCreate, neFileDelete, neFileRename,

   neDriveAdd, neDriveRemove, neShellDriveAdd, neDriveSpaceChange,

   neMediaInsert, neMediaRemove, neFolderCreate, neFolderDelete,

   neFolderRename, neFolderUpdate, neNetShare, neNetUnShare,

   neServerDisconnect, neImageListChange);

 TNotificationEvents = set of TNotificationEvent;

 TShellNotificationEvent1 = procedure(Sender: TObject;

   Path: String)of Object;

 TShellNotificationEvent2 = procedure(Sender: TObject;

   path1, path2: String) of Object;

//  TShellNotificationAttributesEvent = procedure(Sender: TObject;

 //  OldAttribs, NewAttribs: Integer) of Object;

 TShellNotification = class( TComponent )

 private

   fWatchEvents: TNotificationEvents;

   fPath: String;

   fActive, fWatch: Boolean;

   prevPath1, prevPath2: String;

   PrevEvent: Integer;

   Handle, NotifyHandle: HWND;

   fOnAssociationChange: TNotifyEvent;

   fOnAttribChange: TShellNotificationEvent2;

   FOnCreate: TShellNotificationEvent1;

   FOnDelete: TShellNotificationEvent1;

   FOnDriveAdd: TShellNotificationEvent1;

   FOnDriveAddGui: TShellNotificationEvent1;

   FOnDriveRemove: TShellNotificationEvent1;

   FOnMediaInsert: TShellNotificationEvent1;

   FOnMediaRemove: TShellNotificationEvent1;

   FOnDirCreate: TShellNotificationEvent1;

   FOnNetShare: TShellNotificationEvent1;

   FOnNetUnShare: TShellNotificationEvent1;

   FOnRenameFolder: TShellNotificationEvent2;

   FOnItemRename: TShellNotificationEvent2;

   FOnFolderRemove: TShellNotificationEvent1;

   FOnServerDisconnect: TShellNotificationEvent1;

   FOnFolderUpdate: TShellNotificationEvent1;

   function  PathFromPidl(Pidl: PItemIDList): String;

   procedure SetWatchEvents(const Value: TNotificationEvents);

   function GetActive: Boolean;

   procedure SetActive(const Value: Boolean);

   procedure SetPath(const Value: String);

   procedure SetWatch(const Value: Boolean);

 protected

   procedure ShellNotifyRegister;

   procedure ShellNotifyUnregister;

   procedure WndProc(var Message: TMessage);

   procedure DoAssociationChange; dynamic;

   procedure DoAttributesChange(Path1, Path2: String); dynamic;

   procedure DoCreateFile(Path: String); dynamic;

   procedure DoDeleteFile(Path: String); dynamic;

   procedure DoDriveAdd(Path:String); dynamic;

   procedure DoDriveAddGui(Path: String); dynamic;

   procedure DoDriveRemove(Path: String); dynamic;

   procedure DoMediaInsert(Path: String); dynamic;

   procedure DoMediaRemove(Path: String); dynamic;

   procedure DoDirCreate(Path: String); dynamic;

   procedure DoNetShare(Path: String); dynamic;

   procedure DoNetUnShare(Path: String); dynamic;

   procedure DoRenameFolder(Path1, Path2: String); dynamic;

   procedure DoRenameItem(Path1, Path2: String); dynamic;

   procedure DoFolderRemove(Path: String); dynamic;

   procedure DoServerDisconnect(Path: String); dynamic;

   procedure DoDirUpdate(Path: String); dynamic;

 public

   constructor Create(AOwner: TComponent); override;

   destructor  Destroy; override;

 published

   property Path: String read fPath write SetPath;

   property Active: Boolean read GetActive write SetActive;

   property WatchSubTree: Boolean read fWatch write SetWatch;

   property WatchEvents: TNotificationEvents

   read fWatchEvents write SetWatchEvents;

   property OnAssociationChange: TNotifyEvent

   read fOnAssociationChange write FOnAssociationChange;

   property OnAttributesChange: TShellNotificationEvent2

   read fOnAttribChange write fOnAttribChange;

   property OnFileCreate: TShellNotificationEvent1

   read FOnCreate write FOnCreate;

   property OnFolderRename: TShellNotificationEvent2

   read FOnRenameFolder write FOnRenameFolder;

   property OnFolderUpdate: TShellNotificationEvent1

   read FOnFolderUpdate write FOnFolderUpdate;

   property OnFileDelete: TShellNotificationEvent1

   read FOnDelete write FOnDelete;

   property OnDriveAdd: TShellNotificationEvent1

   read FOnDriveAdd write FOnDriveAdd;

   property OnFolderRemove: TShellNotificationEvent1

   read FOnFolderRemove write FOnFolderRemove;

   property OnItemRename: TShellNotificationEvent2

   read FOnItemRename write FOnItemRename;

   property OnDriveAddGui: TShellNotificationEvent1

   read FOnDriveAddGui write FOnDriveAddGui;

   property OnDriveRemove: TShellNotificationEvent1

   read FOnDriveRemove write FOnDriveRemove;

   property OnMediaInserted: TShellNotificationEvent1

   read FOnMediaInsert write FOnMediaInsert;

   property OnMediaRemove: TShellNotificationEvent1

   read FOnMediaRemove write FOnMediaRemove;

   property OnDirCreate: TShellNotificationEvent1

   read FOnDirCreate write FOnDirCreate;

   property OnNetShare: TShellNotificationEvent1

   read FOnNetShare write FOnNetShare;

   property OnNetUnShare: TShellNotificationEvent1

   read FOnNetUnShare write FOnNetUnShare;

   property OnServerDisconnect: TShellNotificationEvent1

   read FOnServerDisconnect write FOnServerDisconnect;

 end;

 function SHChangeNotifyRegister( hWnd: HWND; dwFlags: integer;

      wEventMask  : cardinal; uMsg: UINT; cItems      : integer;

      lpItems     : PNOTIFYREGISTER) : HWND; stdcall;

 function SHChangeNotifyDeregister(hWnd: HWND) : boolean; stdcall;

 function SHILCreateFromPath(Path: Pointer; PIDL: PItemIDList;

     var Attributes: ULONG):HResult; stdcall;

procedure Register;

     

implementation

const Shell32DLL = 'shell32.dll';

 function SHChangeNotifyRegister;   external Shell32DLL index 2;

 function SHChangeNotifyDeregister; external Shell32DLL index 4;

 function SHILCreateFromPath;       external Shell32DLL index 28;

{ TShellNotification }

constructor TShellNotification.Create(AOwner: TComponent);

begin

 inherited Create( AOwner );

 if not (csDesigning in ComponentState) then

   Handle := AllocateHWnd(WndProc);

end;

destructor TShellNotification.Destroy;

begin

 if not (csDesigning in ComponentState) then

   Active := False;

 if Handle <> 0 then DeallocateHWnd( Handle );

 inherited Destroy;

end;

procedure TShellNotification.DoAssociationChange;

begin

 if Assigned( fOnAssociationChange ) and (neAssociationChange in fWatchEvents) then

   fOnAssociationChange( Self );

end;

procedure TShellNotification.DoAttributesChange;

begin

 if Assigned( fOnAttribChange ) then

   fOnAttribChange( Self, Path1, Path2 );

end;

procedure TShellNotification.DoCreateFile(Path: String);

begin

 if Assigned( fOnCreate ) then

   FOnCreate(Self, Path)

end;

procedure TShellNotification.DoDeleteFile(Path: String);

begin

 if Assigned( FOnDelete ) then

   FOnDelete(Self, Path);

end;

procedure TShellNotification.DoDirCreate(Path: String);

begin

 if Assigned( FOnDirCreate ) then

   FOnDirCreate( Self, Path );

end;

procedure TShellNotification.DoDirUpdate(Path: String);

begin

 if Assigned( FOnFolderUpdate ) then

   FOnFolderUpdate(Self, Path);

end;

procedure TShellNotification.DoDriveAdd(Path: String);

begin

 if Assigned( FOnDriveAdd ) then

   FOnDriveAdd(Self, Path);

end;

procedure TShellNotification.DoDriveAddGui(Path: String);

begin

 if Assigned( FOnDriveAddGui ) then

   FOnDriveAdd(Self, Path);

end;

procedure TShellNotification.DoDriveRemove(Path: String);

begin

 if Assigned( FOnDriveRemove ) then

   FOnDriveRemove(Self, Path);

end;

procedure TShellNotification.DoFolderRemove(Path: String);

begin

 if Assigned(FOnFolderRemove) then

   FOnFolderRemove( Self, Path );

end;

procedure TShellNotification.DoMediaInsert(Path: String);

begin

 if Assigned( FOnMediaInsert ) then

   FOnMediaInsert(Self, Path);

end;

procedure TShellNotification.DoMediaRemove(Path: String);

begin

 if Assigned(FOnMediaRemove) then

   FOnMediaRemove(Self, Path);

end;

procedure TShellNotification.DoNetShare(Path: String);

begin

 if Assigned(FOnNetShare) then

   FOnNetShare(Self, Path);

end;

procedure TShellNotification.DoNetUnShare(Path: String);

begin

 if Assigned(FOnNetUnShare) then

   FOnNetUnShare(Self, Path);

end;

procedure TShellNotification.DoRenameFolder(Path1, Path2: String);

begin

 if Assigned( FOnRenameFolder ) then

   FOnRenameFolder(Self, Path1, Path2);

end;

procedure TShellNotification.DoRenameItem(Path1, Path2: String);

begin

 if Assigned( FOnItemRename ) then

   FonItemRename(Self, Path1, Path2);

end;

procedure TShellNotification.DoServerDisconnect(Path: String);

begin

 if Assigned( FOnServerDisconnect ) then

   FOnServerDisconnect(Self, Path);

end;

function TShellNotification.GetActive: Boolean;

begin

 Result := (NotifyHandle <> 0) and (fActive);

end;

function TShellNotification.PathFromPidl(Pidl: PItemIDList): String;

begin

 SetLength(Result, Max_Path);

 if not SHGetPathFromIDList(Pidl, PChar(Result)) then Result := '';

 if pos(#0, Result) > 0 then

   SetLength(Result, pos(#0, Result));

end;

procedure TShellNotification.SetActive(const Value: Boolean);

begin

 if (Value <> fActive) then

 begin

   fActive := Value;

   if fActive then ShellNotifyRegister else ShellNotifyUnregister;

 end;

end;

procedure TShellNotification.SetPath(const Value: String);

begin

 //if fPath <> Value then

 //begin

   fPath := Value;

 //  ShellNotifyRegister;

 //end;

end;

procedure TShellNotification.SetWatch(const Value: Boolean);

begin

 //if fWatch <> Value then

 //begin

   fWatch := Value;

 //  ShellNotifyRegister;

 //end;

end;

procedure TShellNotification.SetWatchEvents(

 const Value: TNotificationEvents);

begin

 //if fWatchEvents <> Value then

 //begin

   fWatchEvents := Value;

 //  ShellNotifyRegister;

 //end;

end;

procedure TShellNotification.ShellNotifyRegister;

var

 NotifyRecord: PNOTIFYREGISTER;

 Flags: DWORD;

 Pidl: PItemIDList;

 Attributes: ULONG;

begin

 if not (csDesigning in ComponentState) and

    not (csLoading in ComponentState) then

 begin

   SHILCreatefromPath( PChar(fPath), Addr(Pidl), Attributes);

   NotifyRecord^.pidlPath := Pidl;

   NotifyRecord^.bWatchSubtree := fWatch;

   if NotifyHandle <> 0 then ShellNotifyUnregister;

   Flags := 0;

   if neAssociationChange in FWatchEvents then

     Flags := Flags or SHCNE_ASSOCCHANGED;

   if neAttributesChange in FWatchEvents then

     Flags := Flags or SHCNE_ATTRIBUTES;

   if neFileChange in FWatchEvents then

     Flags := Flags or SHCNE_UPDATEITEM;

   if neFileCreate in FWatchEvents then

     Flags := Flags or SHCNE_CREATE;

   if neFileDelete in FWatchEvents then

     Flags := Flags or SHCNE_DELETE;

   if neFileRename in FWatchEvents then

     Flags := Flags or SHCNE_RENAMEITEM;

   if neDriveAdd in FWatchEvents then

     Flags := Flags or SHCNE_DRIVEADD;

   if neDriveRemove in FWatchEvents then

     Flags := Flags or SHCNE_DRIVEREMOVED;

   if neShellDriveAdd in FWatchEvents then

     Flags := Flags or SHCNE_DRIVEADDGUI;

   if neDriveSpaceChange in FWatchEvents then

     Flags := Flags or SHCNE_FREESPACE;

   if neMediaInsert in FWatchEvents then

     Flags := Flags or SHCNE_MEDIAINSERTED;

   if neMediaRemove in FWatchEvents then

     Flags := Flags or SHCNE_MEDIAREMOVED;

   if neFolderCreate in FWatchEvents then

     Flags := Flags or SHCNE_MKDIR;

   if neFolderDelete in FWatchEvents then

     Flags := Flags or SHCNE_RMDIR;

   if neFolderRename in FWatchEvents then

     Flags := Flags or SHCNE_RENAMEFOLDER;

   if neFolderUpdate in FWatchEvents then

     Flags := Flags or SHCNE_UPDATEDIR;

   if neNetShare in FWatchEvents then

     Flags := Flags or SHCNE_NETSHARE;

   if neNetUnShare in FWatchEvents then

     Flags := Flags or SHCNE_NETUNSHARE;

   if neServerDisconnect in FWatchEvents then

     Flags := Flags or SHCNE_SERVERDISCONNECT;

   if neImageListChange in FWatchEvents then

     Flags := Flags or SHCNE_UPDATEIMAGE;

   NotifyHandle := SHChangeNotifyRegister(Handle,

     SHCNF_ACCEPT_INTERRUPTS or SHCNF_ACCEPT_NON_INTERRUPTS,

     Flags, SNM_SHELLNOTIFICATION, 1, NotifyRecord);

 end;

end;

procedure TShellNotification.ShellNotifyUnregister;

begin

 if NotifyHandle <> 0 then

   SHChangeNotifyDeregister(NotifyHandle);

end;

procedure TShellNotification.WndProc(var Message: TMessage);

type

  TPIDLLIST = record

     pidlist : array[1..2] of PITEMIDLIST;

  end;

  PIDARRAY = ^TPIDLLIST;

var

  Path1    : string;

  Path2    : string;

  ptr      : PIDARRAY;

  repeated : boolean;

  event    : longint;

begin

 case Message.Msg of

   SNM_SHELLNOTIFICATION:

   begin

     event := Message.LParam and ($7FFFFFFF);

     Ptr   := PIDARRAY(Message.WParam);

     Path1 := PathFromPidl( Ptr^.pidlist[1] );

     Path2 := PathFromPidl( Ptr^.pidList[2] );

     repeated := (PrevEvent = event)

       and (uppercase(prevpath1) = uppercase(Path1))

       and (uppercase(prevpath2) = uppercase(Path2));

     if Repeated then exit;

     PrevEvent := Message.Msg;

     prevPath1 := Path1;

     prevPath2 := Path2;

     case event of

       SHCNE_ASSOCCHANGED      : DoAssociationChange;

       SHCNE_ATTRIBUTES        : DoAttributesChange( Path1, Path2);

       SHCNE_CREATE            : DoCreateFile(Path1);

       SHCNE_DELETE            : DoDeleteFile(Path1);

       SHCNE_DRIVEADD          : DoDriveAdd(Path1);

       SHCNE_DRIVEADDGUI      : DoDriveAddGui(path1);

       SHCNE_DRIVEREMOVED      : DoDriveRemove(Path1);

       SHCNE_MEDIAINSERTED    : DoMediaInsert(Path1);

       SHCNE_MEDIAREMOVED      : DoMediaRemove(Path1);

       SHCNE_MKDIR            : DoDirCreate(Path1);

       SHCNE_NETSHARE          : DoNetShare(Path1);

       SHCNE_NETUNSHARE        : DoNetUnShare(Path1);

       SHCNE_RENAMEFOLDER      : DoRenameFolder(Path1, Path2);

       SHCNE_RENAMEITEM        : DoRenameItem(Path1, Path2);

       SHCNE_RMDIR            : DoFolderRemove(Path1);

       SHCNE_SERVERDISCONNECT : DoServerDisconnect(Path);

       SHCNE_UPDATEDIR        : DoDirUpdate(Path);

       SHCNE_UPDATEIMAGE      : ;

       SHCNE_UPDATEITEM        : ;

     end;//Case event of

   end;//SNM_SHELLNOTIFICATION

 end; //case

end;

procedure Register;

begin

  RegisterComponents('System', [TShellNotification]);

end;

end.