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;
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);
R106276538945
Z160640024212
410011190732605
