extracted LPITEMIDLIST wrappers in a separate header (also [will be] used by wxStdnardPaths)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30000 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2004-10-19 16:43:53 +00:00
parent ae688b6468
commit 6bb0970672
2 changed files with 89 additions and 50 deletions
--- a/include/wx/msw/wrapshl.h
+++ b/include/wx/msw/wrapshl.h
@@ -0,0 +1,81 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/wrapshl.h
+// Purpose:     wrapper class for stuff from shell32.dll
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     2004-10-19
+// RCS-ID:      $Id$
+// Copyright:   (c) 2004 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_WRAPSHL_H_
+#define _WX_MSW_WRAPSHL_H_
+
+#ifdef __WXWINCE__
+    #include <winreg.h>
+    #include <objbase.h>
+    #include <shlguid.h>
+#endif
+
+#include <shlobj.h>
+
+// ----------------------------------------------------------------------------
+// wxItemIdList implements RAII on top of ITEMIDLIST
+// ----------------------------------------------------------------------------
+
+class wxItemIdList
+{
+public:
+    // ctor takes ownership of the item and will free it
+    wxItemIdList(LPITEMIDLIST pidl)
+    {
+        m_pidl = pidl;
+    }
+
+    static void Free(LPITEMIDLIST pidl)
+    {
+        if ( pidl )
+        {
+            LPMALLOC pMalloc;
+            SHGetMalloc(&pMalloc);
+            if ( pMalloc )
+            {
+                pMalloc->Free(pidl);
+                pMalloc->Release();
+            }
+            else
+            {
+                wxLogLastError(wxT("SHGetMalloc"));
+            }
+        }
+    }
+
+    ~wxItemIdList()
+    {
+        Free(m_pidl);
+    }
+
+    // implicit conversion to LPITEMIDLIST
+    operator LPITEMIDLIST() const { return m_pidl; }
+
+    // get the corresponding path, returns empty string on error
+    wxString GetPath() const
+    {
+        wxString path;
+        if ( !SHGetPathFromIDList(m_pidl, wxStringBuffer(path, MAX_PATH)) )
+        {
+            wxLogLastError(_T("SHGetPathFromIDList"));
+        }
+
+        return path;
+    }
+
+private:
+    LPITEMIDLIST m_pidl;
+
+    DECLARE_NO_COPY_CLASS(wxItemIdList)
+};
+
+#endif // _WX_MSW_WRAPSHL_H_
+