don't use annoying and unneeded in C++ casts of NULL to "T *" in all other files...

[wxWidgets.git] / include / wx / msw / ole / oleutils.h

diff --git a/include/wx/msw/ole/oleutils.h b/include/wx/msw/ole/oleutils.h
index afab7f2854375b1a95acbd73ebd5d0b795b542eb..7766d6b9c58c868fa31ecceb5603f0720943de6b 100644 (file)
--- a/include/wx/msw/ole/oleutils.h
+++ b/include/wx/msw/ole/oleutils.h
@@ -12,19 +12,54 @@
 #ifndef   _WX_OLEUTILS_H
 #define   _WX_OLEUTILS_H
 
-#ifdef __GNUG__
-#pragma interface "oleutils.h"
-#endif
-
 #include "wx/defs.h"
 
+#if wxUSE_OLE
+
+// ole2.h includes windows.h, so include wrapwin.h first
+#include "wx/msw/wrapwin.h"
 // get IUnknown, REFIID &c
 #include <ole2.h>
+#include "wx/intl.h"
+#include "wx/log.h"
 
 // ============================================================================
 // General purpose functions and macros
 // ============================================================================
 
+// ----------------------------------------------------------------------------
+// initialize/cleanup OLE
+// ----------------------------------------------------------------------------
+
+// call OleInitialize() or CoInitialize[Ex]() depending on the platform
+//
+// return true if ok, false otherwise
+inline bool wxOleInitialize()
+{
+    // we need to initialize OLE library
+#ifdef __WXWINCE__
+    if ( FAILED(::CoInitializeEx(NULL, COINIT_MULTITHREADED)) )
+#else
+    if ( FAILED(::OleInitialize(NULL)) )
+#endif
+    {
+        wxLogError(_("Cannot initialize OLE"));
+
+        return false;
+    }
+
+    return true;
+}
+
+inline void wxOleUninitialize()
+{
+#ifdef __WXWINCE__
+    ::CoUninitialize();
+#else
+    ::OleUninitialize();
+#endif
+}
+
 // ----------------------------------------------------------------------------
 // misc helper functions/macros
 // ----------------------------------------------------------------------------
@@ -39,7 +74,7 @@ inline void ReleaseInterface(IUnknown *pIUnk)
 // release the interface pointer (if !NULL) and make it NULL
 #define   RELEASE_AND_NULL(p)   if ( (p) != NULL ) { p->Release(); p = NULL; };
 
-// return TRUE if the iid is in the array
+// return true if the iid is in the array
 extern bool IsIidFromList(REFIID riid, const IID *aIids[], size_t nCount);
 
 // ============================================================================
@@ -72,8 +107,8 @@ public:
     wxAutoULong(ULONG value = 0) : m_Value(value) { }
 
     operator ULONG&() { return m_Value; }
-    ULONG& operator=(ULONG value) { return m_Value = value; }
-    
+    ULONG& operator=(ULONG value) { m_Value = value; return m_Value;  }
+
     wxAutoULong& operator++() { ++m_Value; return *this; }
     const wxAutoULong operator++( int ) { wxAutoULong temp = *this; ++m_Value; return temp; }
 
@@ -134,7 +169,7 @@ private:
   {                                                                           \
     wxLogRelease(_T(#classname), m_cRef);                                     \
                                                                               \
-    if ( --m_cRef == 0 ) {                                                    \
+    if ( --m_cRef == wxAutoULong(0) ) {                                                    \
       delete this;                                                            \
       return 0;                                                               \
     }                                                                         \
@@ -161,50 +196,58 @@ void wxLogQueryInterface(const wxChar *szInterface, REFIID riid);
 void wxLogAddRef (const wxChar *szInterface, ULONG cRef);
 void wxLogRelease(const wxChar *szInterface, ULONG cRef);
 
-#else   //!WXDEBUG
+#else   //!__WXDEBUG__
   #define   wxLogQueryInterface(szInterface, riid)
   #define   wxLogAddRef(szInterface, cRef)
   #define   wxLogRelease(szInterface, cRef)
-#endif  //WXDEBUG
+#endif  //__WXDEBUG__
 
 // wrapper around BSTR type (by Vadim Zeitlin)
 
-class WXDLLEXPORT wxBasicString
+class WXDLLIMPEXP_CORE wxBasicString
 {
 public:
     // ctors & dtor
-    wxBasicString(const char *sz);
     wxBasicString(const wxString& str);
+    wxBasicString(const wxBasicString& bstr);
     ~wxBasicString();
-    
-    void Init(const char* sz);
-    
+
+    wxBasicString& operator=(const wxBasicString& bstr);
+
     // accessors
-    // just get the string
-    operator BSTR() const { return m_wzBuf; }
-    // retrieve a copy of our string - caller must SysFreeString() it later!
-    BSTR Get() const { return SysAllocString(m_wzBuf); }
-    
+        // just get the string
+    operator BSTR() const { return m_bstrBuf; }
+        // retrieve a copy of our string - caller must SysFreeString() it later!
+    BSTR Get() const { return SysAllocString(m_bstrBuf); }
+
 private:
-    // @@@ not implemented (but should be)
-    wxBasicString(const wxBasicString&);
-    wxBasicString& operator=(const wxBasicString&);
-    
-    OLECHAR *m_wzBuf;     // actual string
+    // actual string
+    BSTR m_bstrBuf;
 };
 
+#if wxUSE_VARIANT
 // Convert variants
-class WXDLLEXPORT wxVariant;
+class WXDLLIMPEXP_FWD_BASE wxVariant;
 
-bool wxConvertVariantToOle(const wxVariant& variant, VARIANTARG& oleVariant) ;
-bool wxConvertOleToVariant(const VARIANTARG& oleVariant, wxVariant& variant) ;
+WXDLLIMPEXP_CORE bool wxConvertVariantToOle(const wxVariant& variant, VARIANTARG& oleVariant);
+WXDLLIMPEXP_CORE bool wxConvertOleToVariant(const VARIANTARG& oleVariant, wxVariant& variant);
+#endif // wxUSE_VARIANT
 
 // Convert string to Unicode
-BSTR wxConvertStringToOle(const wxString& str);
+WXDLLIMPEXP_CORE BSTR wxConvertStringToOle(const wxString& str);
 
 // Convert string from BSTR to wxString
-wxString wxConvertStringFromOle(BSTR bStr);
+WXDLLIMPEXP_CORE wxString wxConvertStringFromOle(BSTR bStr);
 
+#else // !wxUSE_OLE
 
-#endif  //_WX_OLEUTILS_H
+// ----------------------------------------------------------------------------
+// stub functions to avoid #if wxUSE_OLE in the main code
+// ----------------------------------------------------------------------------
 
+inline bool wxOleInitialize() { return false; }
+inline void wxOleUninitialize() { }
+
+#endif // wxUSE_OLE/!wxUSE_OLE
+
+#endif  //_WX_OLEUTILS_H