allow setting empty tooltip in SetIcon() (patch 1750994)

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

diff --git a/include/wx/msw/ole/dataobj.h b/include/wx/msw/ole/dataobj.h
index 18bb6ddd2f633b32d77122519cd2491bfec7dbda..0cb65ba03c64c67305daa90949e5f4a2dc96261f 100644 (file)
--- a/include/wx/msw/ole/dataobj.h
+++ b/include/wx/msw/ole/dataobj.h
@@ -6,7 +6,7 @@
 // Created:     10.05.98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence:     wxWidgets licence
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef   _WX_MSW_OLE_DATAOBJ_H
@@ -36,10 +36,23 @@ public:
     // it is deleted, it should delete us as well
     void SetAutoDelete();
 
-    // return TRUE if we support this format in "Get" direction
+    // return true if we support this format in "Get" direction
     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);
@@ -56,6 +69,7 @@ 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