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| //------------------------------------------------------------------------------------------//
// .Menu contextuel système d'un fichier donné. //
//------------------------------------------------------------------------------------------//
unit UnitPopupMenuProprieteFichier;
interface
uses Windows, SysUtils, ShlObj, ComObj;
procedure DisplayContextMenuForFile(ApplicationMainFormHandle: THandle; szFileName: String);
var
_ApplicationMainFormHandle: THandle;
implementation
function SlashDirName(szDir: String): String;
var
s: String;
bRootDir: Boolean;
begin
if szDir <> '' then
begin
s := szDir;
bRootDir := ((Length(s) = 3) and (S[2] = ':')) or (s = '\');
if not bRootDir then
if s[Length(s)] <> '\' then
s := s + '\';
Result := s;
end;
end;
function SHGetIDListFromPath(Path: TFileName; var ShellFolder: IShellFolder): pItemIDList;
var
TempPath, NextDir: TFileName;
nSlashPos, nScanParam: Integer;
Folder, subFolder: IShellFolder;
PIDL, PIDLbase: PItemIDList;
ParseStruct: TStrRet;
szParseName: String;
EList: IEnumIDList;
DidGet: ULONG;
begin
SHGetDesktopFolder(Folder);
SHGetSpecialFolderLocation(0, CSIDL_DRIVES, PIDLbase);
OLECheck(Folder.BindToObject(PIDLbase, nil, IID_IShellFolder, Pointer(SubFolder)));
TempPath := Path;
NextDir := '';
//.Enumerate the path one directory at a time.
while Length(TempPath) > 0 do
begin
nSlashPos := Pos('\', TempPath);
if nSlashPos > 0 then
begin
if Pos(':', TempPath) > 0 then
NextDir := Copy(TempPath, 1, 3)
else
NextDir := SlashDirName(NextDir) + Copy(TempPath, 1, nSlashPos - 1);
TempPath := Copy(TempPath, nSlashPos + 1, Length(TempPath));
end
else
begin
if NextDir = '' then
NextDir:=TempPath
else
NextDir := SlashDirName(NextDir) + TempPath;
TempPath := '';
end;
Pidl := PidlBase;
nScanParam := SHCONTF_FOLDERS or SHCONTF_INCLUDEHIDDEN;
if (NextDir = Path) and (not DirectoryExists(Path)) then
nScanParam := nScanParam or SHCONTF_NONFOLDERS;
if S_OK = SubFolder.EnumObjects(0, nScanParam, EList) then
while S_OK = EList.Next(1, pidl, DidGet) do
begin
OLECheck(SubFolder.GetDisplayNameOf(PIDL, SHGDN_FORPARSING, ParseStruct));
case ParseStruct.uType of
STRRET_CSTR: szParseName := ParseStruct.cStr;
STRRET_WSTR: szParseName := WideCharToString(ParseStruct.pOleStr);
STRRET_OFFSET: szParsename := PChar(DWORD(Pidl) + ParseStruct.uOffset);
end;
if UpperCase(szParsename) = UpperCase(NextDir) then
Break;
end
else
begin
Folder := nil;
Result := nil;
Exit;
end;
if DidGet = 0 then
begin
Folder := nil;
Result := nil;
Exit;
end;
PIDLBase := Pidl;
Folder := subFolder;
//.As best as we can, determine whether or not this is a file.
//.If so then we cannot bind it to the ShellFolder (hence "folder".)
if not FileExists(NextDir) then
OLECheck(Folder.BindToObject(Pidl, nil, IID_IShellFolder, Pointer(SubFolder)));
end;
ShellFolder := Folder;
if ShellFolder = nil then
Result := nil
else
Result := Pidl;
end;
procedure ContextMenuForFile(Folder: IShellFolder; Pidl: pItemIDList);
var
aContextMenu: IContextMenu;
aPrgOut: Pointer;
aPopup: hMenu;
nCmd: Integer;
aCmdInfo: TCMInvokeCommandInfo;
// MenuInfo: TMenuItemInfo;
// t, ItemCount: integer;
// buf: array[0..80] of Char;
Where: TPoint;
begin
GetCursorPos(Where);
aPrgOut := nil;
OLECheck(Folder.GetUIObjectOf(_ApplicationMainFormHandle, 1, Pidl, IID_IContextMenu, aPrgOut, Pointer(aContextMenu)));
aPopup := CreatePopUpMenu;
if aPopup = 0 then
Exit;
try
OLECheck(aContextMenu.QueryContextMenu(aPopup, 0, 1, $7FFF, CMF_NORMAL));
nCmd := Integer(TrackPopupMenuEx(aPopup, TPM_LEFTALIGN or TPM_RETURNCMD or TPM_RIGHTBUTTON or TPM_HORIZONTAL or TPM_VERTICAL, Where.X, Where.Y, _ApplicationMainFormHandle, nil));
if nCmd <> 0 then
begin
Fillchar(aCmdInfo, Sizeof(aCmdInfo), 0);
with aCmdInfo do
begin
cbSize := SizeOf(TCMInvokeCommandInfo);
hwnd := _ApplicationMainFormHandle;
lpVerb := MakeIntResource(nCmd - 1);
nShow := SW_SHOWNORMAL;
end;
try
aContextMenu.InvokeCommand(aCmdInfo);
except
raise Exception.Create('.Erreur : le menu système de ce fichier ne peut pas être créé !');
end;
end;
finally
DestroyMenu(aPopup);
end;
end;
procedure DisplayContextMenuForFile(ApplicationMainFormHandle: THandle; szFileName: String);
var
ShellFolder: IShellFolder;
Pidl: pItemIDList;
begin
_ApplicationMainFormHandle := ApplicationMainFormHandle;
Pidl := SHGetIDListFromPath(szFileName, ShellFolder);
if Assigned(Pidl) then
ContextMenuForFile(ShellFolder, Pidl);
end;
end. |
