%% Modified by:
%% Created: 18.10.99
%% RCS-ID: $Id$
-%% Copyright: (c) wxWindows team
+%% Copyright: (c) wxWidgets team
%% License: wxWindows license
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
A wxDataObject represents data that can be copied to or from the clipboard, or
dragged and dropped. The important thing about wxDataObject is that this is a
-'smart' piece of data unlike usual 'dumb' data containers such as memory
+'smart' piece of data unlike 'dumb' data containers such as memory
buffers or files. Being 'smart' here means that the data object itself should
know what data formats it supports and how to render itself in each of
-supported formats.
+its supported formats.
A supported format, incidentally, is exactly the format in which the data can
be requested from a data object or from which the data object may be set. In
};
\end{verbatim}
-which allows to distinguish between them. See
+which distinguishes between them. See
\helpref{wxDataFormat}{wxdataformat} documentation for more about formats.
-Not surprizingly, being 'smart' comes at a price of added complexity. This is
+Not surprisingly, being 'smart' comes at a price of added complexity. This is
reasonable for the situations when you really need to support multiple formats,
but may be annoying if you only want to do something simple like cut and paste
text.
-To provide a solution for both cases, wxWindows has two predefined classes
+To provide a solution for both cases, wxWidgets has two predefined classes
which derive from wxDataObject: \helpref{wxDataObjectSimple}{wxdataobjectsimple} and
\helpref{wxDataObjectComposite}{wxdataobjectcomposite}.
\helpref{wxDataObjectSimple}{wxdataobjectsimple} is
the simplest wxDataObject possible and only holds data in a single format (such
as HTML or text) and \helpref{wxDataObjectComposite}{wxdataobjectcomposite} is
-the simplest way to implement wxDataObject which does support multiple formats
-because it achievs this by simply holding several wxDataObjectSimple objects.
+the simplest way to implement a wxDataObject that does support multiple formats
+because it achieves this by simply holding several wxDataObjectSimple objects.
So, you have several solutions when you need a wxDataObject class (and you need
one as soon as you want to transfer data via the clipboard or drag and drop):
solution which allows you to support any number of formats (either
standard or custom if you combine it with the previous solution).}
\twocolitem{{\bf 4. Use wxDataObject directly}}{This is the solution for
-maximal flexibility and efficiency, but it is also is the most difficult to
+maximal flexibility and efficiency, but it is also the most difficult to
implement.}
\end{twocollist}
will have to derive from wxDataObject directly and make it enumerate its
formats and provide the data in the requested format on demand.
-Note that neither the GTK data transfer mechanisms for the clipboard and
-drag and drop, nor the OLE data transfer copy any data until another application
+Note that neither the GTK+ data transfer mechanisms for clipboard and
+drag and drop, nor OLE data transfer, copy any data until another application
actually requests the data. This is in contrast to the 'feel' offered to the
user of a program who would normally think that the data resides in the
clipboard after having pressed 'Copy' - in reality it is only declared to be
You may also derive your own data object classes from
\helpref{wxCustomDataObject}{wxcustomdataobject} for user-defined types. The
-format of user-defined data is given as mime-type string literal, such as
+format of user-defined data is given as a mime-type string literal, such as
"application/word" or "image/png". These strings are used as they are under
-Unix (so far only GTK) to identify a format and are translated into their
+Unix (so far only GTK+) to identify a format and are translated into their
Windows equivalent under Win32 (using the OLE IDataObject for data exchange to
and from the clipboard and for drag and drop). Note that the format string
translation under Windows is not yet finished.
Derive a class from \helpref{wxPyDataObjectSimple}{wxdataobjectsimple}
instead.}
+\perlnote{This class is not currently usable from wxPerl; you may
+use \helpref{Wx::PlDataObjectSimple}{wxdataobjectsimple} instead.}
+
\wxheading{Virtual functions to override}
Each class derived directly from wxDataObject must override and implement all
<wx/dataobj.h>
+\wxheading{Library}
+
+\helpref{wxCore}{librarieslist}
+
\wxheading{See also}
\helpref{Clipboard and drag and drop overview}{wxdndoverview},
Copy all supported formats in the given direction to the array pointed to by
{\it formats}. There is enough space for GetFormatCount(dir) formats in it.
+\perlnote{In wxPerl this method only takes the {\tt dir} parameter.
+In scalar context it returns the first format,
+in list context it returns a list containing all the supported formats.}
+
\membersection{wxDataObject::GetDataHere}\label{wxdataobjectgetdatahere}
\constfunc{virtual bool}{GetDataHere}{\param{const wxDataFormat\&}{ format}, \param{void }{*buf} }
The method will write the data of the format {\it format} in the buffer {\it
-buf} and return TRUE on success, FALSE on failure.
+buf} and return true on success, false on failure.
\membersection{wxDataObject::GetDataSize}\label{wxdataobjectgetdatasize}
Set the data in the format {\it format} of the length {\it len} provided in the
buffer {\it buf}.
-Returns TRUE on success, FALSE on failure.
+Returns true on success, false on failure.
projects / wxWidgets.git / blobdiff