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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/ole/dataobj.h
// Purpose: declaration of the wxDataObject class
// Author: Vadim Zeitlin
// Modified by:
// Created: 10.05.98
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_OLE_DATAOBJ_H
#define _WX_MSW_OLE_DATAOBJ_H
// ----------------------------------------------------------------------------
// forward declarations
// ----------------------------------------------------------------------------
struct IDataObject;
// ----------------------------------------------------------------------------
// wxDataObject is a "smart" and polymorphic piece of data.
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDataObject : public wxDataObjectBase
{
public:
// ctor & dtor
wxDataObject();
virtual ~wxDataObject();
// retrieve IDataObject interface (for other OLE related classes)
IDataObject *GetInterface() const { return m_pIDataObject; }
// tell the object that it should be now owned by IDataObject - i.e. when
// it is deleted, it should delete us as well
void SetAutoDelete();
// 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);
#define wxGetFormatName(format) wxDataObject::GetFormatName(format)
#else // !Debug
#define wxGetFormatName(format) wxT("")
#endif // Debug/!Debug
// they need to be accessed from wxIDataObject, so made them public,
// or wxIDataObject friend
public:
virtual const void* GetSizeFromBuffer( const void* buffer, size_t* size,
const wxDataFormat& format );
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
wxDECLARE_NO_COPY_CLASS(wxDataObject);
};
#endif //_WX_MSW_OLE_DATAOBJ_H
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