X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0a0e6a5bafe2efb3466b1527eb7eb670aaa5e634..ca6911c361b04290fe1f0e64b616249b3b3d71ba:/include/wx/msw/ole/dataobj.h

diff --git a/include/wx/msw/ole/dataobj.h b/include/wx/msw/ole/dataobj.h
index 0553a5a8c8..dc7a89c2f2 100644
--- a/include/wx/msw/ole/dataobj.h
+++ b/include/wx/msw/ole/dataobj.h
@@ -22,7 +22,7 @@ struct IDataObject;
 // wxDataObject is a "smart" and polymorphic piece of data.
 // ----------------------------------------------------------------------------
 
-class WXDLLEXPORT wxDataObject : public wxDataObjectBase
+class WXDLLIMPEXP_CORE wxDataObject : public wxDataObjectBase
 {
 public:
     // ctor & dtor
@@ -40,6 +40,19 @@ public:
     bool IsSupportedFormat(const wxDataFormat& format) const
         { return wxDataObjectBase::IsSupported(format, Get); }
 
+    // if this method returns false, this wxDataObject will be copied to
+    // the clipboard with its size prepended to it, which is compatible with
+    // older wx versions
+    //
+    // if returns true, then this wxDataObject will be copied to the clipboard
+    // without any additional information and ::HeapSize() function will be used
+    // to get the size of that data
+    virtual bool NeedsVerbatimData(const wxDataFormat& WXUNUSED(format)) const
+    {
+        // return false from here only for compatibility with earlier wx versions
+        return true;
+    }
+
     // function to return symbolic name of clipboard format (for debug messages)
 #ifdef __WXDEBUG__
     static const wxChar *GetFormatName(wxDataFormat format);
@@ -56,10 +69,11 @@ public:
     virtual void* SetSizeInBuffer( void* buffer, size_t size,
                                    const wxDataFormat& format );
     virtual size_t GetBufferOffset( const wxDataFormat& format );
+
 private:
     IDataObject *m_pIDataObject; // pointer to the COM interface
 
-    DECLARE_NO_COPY_CLASS(wxDataObject)
+    wxDECLARE_NO_COPY_CLASS(wxDataObject);
 };
 
 #endif  //_WX_MSW_OLE_DATAOBJ_H