111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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// Name: ole/dataobj.h
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// Purpose: declaration of the wxDataObject class
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 10.05.98
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// RCS-ID: $Id$
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// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows license
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _OLEDATAOBJ_H
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#define _OLEDATAOBJ_H
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// ----------------------------------------------------------------------------
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// forward declarations
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// ----------------------------------------------------------------------------
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struct IDataObject;
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// ----------------------------------------------------------------------------
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// wxDataObject is a "smart" and polymorphic piece of data.
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//
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// @@@ it's currently "read-only" from COM point of view, i.e. we don't support
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// SetData. We don't support all advise functions neither (but it's easy to
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// do if we really want them)
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// ----------------------------------------------------------------------------
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class wxDataObject
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{
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public:
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// all data formats (values are the same as in windows.h, do not change!)
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enum StdFormat
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{
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Invalid,
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Text,
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Bitmap,
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MetafilePict,
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Sylk,
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Dif,
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Tiff,
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OemText,
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Dib,
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Palette,
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Pendata,
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Riff,
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Wave,
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UnicodeText,
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EnhMetafile,
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Hdrop,
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Locale,
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Max
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};
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#ifdef __DEBUG__
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// function to return symbolic name of clipboard format (debug messages)
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static const char *GetFormatName(wxDataFormat format);
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#endif
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// ctor & dtor
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wxDataObject();
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~wxDataObject();
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// pure virtuals to override
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// get the best suited format for our data
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virtual wxDataFormat GetPreferredFormat() const = 0;
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// decide if we support this format (should be one of values of
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// StdFormat enumerations or a user-defined format)
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virtual bool IsSupportedFormat(wxDataFormat format) const = 0;
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// get the (total) size of data
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virtual uint GetDataSize() const = 0;
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// copy raw data to provided pointer
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virtual void GetDataHere(void *pBuf) const = 0;
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// accessors
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// retrieve IDataObject interface (for other OLE related classes)
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IDataObject *GetInterface() const { return m_pIDataObject; }
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private:
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IDataObject *m_pIDataObject; // pointer to the COM interface
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};
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// ----------------------------------------------------------------------------
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// wxTextDataObject is a specialization of wxDataObject for text data
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// ----------------------------------------------------------------------------
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class wxTextDataObject : public wxDataObject
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{
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public:
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// ctors
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wxTextDataObject();
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wxTextDataObject(const wxString& strText) : m_strText(strText) { }
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void Init(const wxString& strText) { m_strText = strText; }
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// implement base class pure virtuals
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virtual wxDataFormat GetPreferredFormat() const
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{ return wxDataObject::Text; }
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virtual bool IsSupportedFormat(wxDataFormat format) const
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{ return format == wxDataObject::Text || format == wxDataObject::Locale; }
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virtual uint GetDataSize() const
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{ return m_strText.Len() + 1; } // +1 for trailing '\0'of course
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virtual void GetDataHere(void *pBuf) const
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{ memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
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private:
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wxString m_strText;
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};
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// ----------------------------------------------------------------------------
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// @@@ TODO: wx{Bitmap|Metafile|...}DataObject
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// ----------------------------------------------------------------------------
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#endif //_OLEDATAOBJ_H
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