// wxDataObject is a "smart" and polymorphic piece of data.
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxDataObject
+class WXDLLEXPORT wxDataObject : public wxDataObjectBase
{
public:
// ctor & dtor
wxDataObject();
virtual ~wxDataObject();
- // pure virtuals to override
- // get the best suited format for rendering our data
- virtual wxDataFormat GetPreferredFormat() const = 0;
- // get the number of formats we support: it is understood that if we
- // can accept data in some format, then we can render data in this
- // format as well, but the contrary is not necessarily true. For the
- // default value of the argument, all formats we support should be
- // returned, but if outputOnlyToo == FALSE, then we should only return
- // the formats which our SetData() understands
- virtual size_t GetFormatCount(bool outputOnlyToo = TRUE) const
- { return 1; }
- // return all formats in the provided array (of size GetFormatCount())
- virtual void GetAllFormats(wxDataFormat *formats,
- bool outputOnlyToo = TRUE) const
- { formats[0] = GetPreferredFormat(); }
- // get the (total) size of data for the given format
- virtual size_t GetDataSize(const wxDataFormat& format) const = 0;
- // copy raw data (in the specified format) to provided pointer
- virtual bool GetDataHere(const wxDataFormat& format, void *buf) const = 0;
- // get data from the buffer (in the given format)
- virtual bool SetData(const wxDataFormat& format, const void *buf) = 0;
-
- // accessors
- // retrieve IDataObject interface (for other OLE related classes)
+ // retrieve IDataObject interface (for other OLE related classes)
IDataObject *GetInterface() const { return m_pIDataObject; }
- // a simpler name which makes more sense for data objects supporting
- // only one format
- wxDataFormat GetFormat() const { return GetPreferredFormat(); }
-
- // old interface
- // decide if we support this format (can be either standard or custom
- // format) -- now uses GetAllFormats()
- virtual bool IsSupportedFormat(const wxDataFormat& format) const;
-
- // implementation only from now on
- // -------------------------------
// 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();
-#ifdef __WXDEBUG__
- // function to return symbolic name of clipboard format (for debug messages)
- static const char *GetFormatName(wxDataFormat format);
-#endif // Debug
-
-private:
- IDataObject *m_pIDataObject; // pointer to the COM interface
-};
+ // 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;
+ }
-// ----------------------------------------------------------------------------
-// wxTextDataObject is a specialization of wxDataObject for text data
-// ----------------------------------------------------------------------------
-
-class WXDLLEXPORT wxTextDataObject : public wxDataObject
-{
+ // 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) _T("")
+#endif // Debug/!Debug
+ // they need to be accessed from wxIDataObject, so made them public,
+ // or wxIDataObject friend
public:
- // ctors
- wxTextDataObject() { }
- wxTextDataObject(const wxString& strText) : m_strText(strText) { }
- void Init(const wxString& strText) { m_strText = strText; }
-
- // implement base class pure virtuals
- virtual wxDataFormat GetPreferredFormat() const
- { return wxDF_TEXT; }
- virtual bool IsSupportedFormat(const wxDataFormat& format) const
- { return format == wxDF_TEXT || format == wxDF_LOCALE; }
- virtual size_t GetDataSize(const wxDataFormat& format) const
- { return m_strText.Len() + 1; } // +1 for trailing '\0'of course
- virtual bool GetDataHere(const wxDataFormat& format, void *buf) const
- { memcpy(buf, m_strText.c_str(), GetDataSize(format)); return TRUE; }
- virtual bool SetData(const wxDataFormat& format, const void *buf)
- { m_strText = (const wxChar *)buf; return TRUE; }
-
- // additional helpers
- void SetText(const wxString& strText) { m_strText = strText; }
- wxString GetText() const { return m_strText; }
+ 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:
- wxString m_strText;
-};
-
-// ----------------------------------------------------------------------------
-// wxBitmapDataObject is a specialization of wxDataObject for bitmap data
-// ----------------------------------------------------------------------------
-
-#include "wx/bitmap.h"
-
-class WXDLLEXPORT wxBitmapDataObject : public wxDataObject
-{
-public:
- // ctors
- wxBitmapDataObject() { }
- wxBitmapDataObject(const wxBitmap& bitmap): m_bitmap(bitmap) { }
-
- // set/get our bitmap
- void SetBitmap(const wxBitmap& bitmap) { m_bitmap = bitmap; }
- const wxBitmap GetBitmap() const { return m_bitmap; }
-
- // implement base class pure virtuals
- virtual wxDataFormat GetPreferredFormat() const { return wxDF_BITMAP; }
- virtual size_t GetFormatCount(bool outputOnlyToo = TRUE) const;
- virtual void GetAllFormats(wxDataFormat *formats,
- bool outputOnlyToo = TRUE) const;
- virtual size_t GetDataSize(const wxDataFormat& format) const;
- virtual bool GetDataHere(const wxDataFormat& format, void *buf) const;
- virtual bool SetData(const wxDataFormat& format, const void *buf);
+ IDataObject *m_pIDataObject; // pointer to the COM interface
-private:
- wxBitmap m_bitmap;
+ DECLARE_NO_COPY_CLASS(wxDataObject)
};
-// ----------------------------------------------------------------------------
-// wxMetaFileDataObject: see metafile.h is a specialization of wxDataObject for bitmap data
-// ----------------------------------------------------------------------------
-
-// TODO: wxFileDataObject.
-
#endif //_WX_MSW_OLE_DATAOBJ_H
-
projects / wxWidgets.git / blobdiff