0e10e38d8b
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32259 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
127 lines
4.6 KiB
TeX
127 lines
4.6 KiB
TeX
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%% Name: dataform.tex
|
|
%% Purpose: wxDataFormat documentation
|
|
%% Author: Vadim Zeitlin
|
|
%% Modified by:
|
|
%% Created: 03.11.99
|
|
%% RCS-ID: $Id$
|
|
%% Copyright: (c) Vadim Zeitlin
|
|
%% License: wxWidgets license
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
\section{\class{wxDataFormat}}\label{wxdataformat}
|
|
|
|
A wxDataFormat is an encapsulation of a platform-specific format handle which
|
|
is used by the system for the clipboard and drag and drop operations. The
|
|
applications are usually only interested in, for example, pasting data from the
|
|
clipboard only if the data is in a format the program understands and a data
|
|
format is something which uniquely identifies this format.
|
|
|
|
On the system level, a data format is usually just a number ({\tt CLIPFORMAT}
|
|
under Windows or {\tt Atom} under X11, for example) and the standard formats
|
|
are, indeed, just numbers which can be implicitly converted to wxDataFormat.
|
|
The standard formats are:
|
|
|
|
\begin{twocollist}\itemsep=1cm
|
|
\twocolitem{wxDF\_INVALID}{An invalid format - used as default argument for
|
|
functions taking a wxDataFormat argument sometimes}
|
|
\twocolitem{wxDF\_TEXT}{Text format (wxString)}
|
|
\twocolitem{wxDF\_BITMAP}{A bitmap (wxBitmap)}
|
|
\twocolitem{wxDF\_METAFILE}{A metafile (wxMetafile, Windows only)}
|
|
\twocolitem{wxDF\_FILENAME}{A list of filenames}
|
|
\twocolitem{wxDF\_HTML}{An HTML string. This is only valid when passed to wxSetClipboardData
|
|
when compiled with Visual C++ in non-Unicode mode}
|
|
\end{twocollist}
|
|
|
|
As mentioned above, these standard formats may be passed to any function taking
|
|
wxDataFormat argument because wxDataFormat has an implicit conversion from
|
|
them (or, to be precise from the type {\tt wxDataFormat::NativeFormat} which is
|
|
the type used by the underlying platform for data formats).
|
|
|
|
Aside the standard formats, the application may also use custom formats which
|
|
are identified by their names (strings) and not numeric identifiers. Although
|
|
internally custom format must be created (or {\it registered}) first, you
|
|
shouldn't care about it because it is done automatically the first time the
|
|
wxDataFormat object corresponding to a given format name is created. The only
|
|
implication of this is that you should avoid having global wxDataFormat objects
|
|
with non-default constructor because their constructors are executed before the
|
|
program has time to perform all necessary initialisations and so an attempt to
|
|
do clipboard format registration at this time will usually lead to a crash!
|
|
|
|
\wxheading{Virtual functions to override}
|
|
|
|
None
|
|
|
|
\wxheading{Derived from}
|
|
|
|
None
|
|
|
|
\wxheading{See also}
|
|
|
|
\helpref{Clipboard and drag and drop overview}{wxdndoverview},
|
|
\helpref{DnD sample}{samplednd},
|
|
\helpref{wxDataObject}{wxdataobject}
|
|
|
|
\wxheading{Include files}
|
|
|
|
<wx/dataobj.h>
|
|
|
|
\latexignore{\rtfignore{\wxheading{Members}}}
|
|
|
|
\membersection{wxDataFormat::wxDataFormat}\label{wxdataformatwxdataformatdef}
|
|
|
|
\func{}{wxDataFormat}{\param{NativeFormat}{ format = wxDF\_INVALID}}
|
|
|
|
Constructs a data format object for one of the standard data formats or an
|
|
empty data object (use \helpref{SetType}{wxdataformatsettype} or
|
|
\helpref{SetId}{wxdataformatsetid} later in this case)
|
|
|
|
\perlnote{In wxPerl this function is named {\tt newNative}.}
|
|
|
|
\membersection{wxDataFormat::wxDataFormat}\label{wxdataformatwxdataformat}
|
|
|
|
\func{}{wxDataFormat}{\param{const wxChar }{*format}}
|
|
|
|
Constructs a data format object for a custom format identified by its name
|
|
{\it format}.
|
|
|
|
\perlnote{In wxPerl this function is named {\tt newUser}.}
|
|
|
|
\membersection{wxDataFormat::operator $==$}\label{wxdataformatoperatoreq}
|
|
|
|
\constfunc{bool}{operator $==$}{\param{const wxDataFormat\&}{ format}}
|
|
|
|
Returns true if the formats are equal.
|
|
|
|
\membersection{wxDataFormat::operator $!=$}\label{wxdataformatoperatorneq}
|
|
|
|
\constfunc{bool}{operator $!=$}{\param{const wxDataFormat\&}{ format}}
|
|
|
|
Returns true if the formats are different.
|
|
|
|
\membersection{wxDataFormat::GetId}\label{wxdataformatgetid}
|
|
|
|
\constfunc{wxString}{GetId}{\void}
|
|
|
|
Returns the name of a custom format (this function will fail for a standard
|
|
format).
|
|
|
|
\membersection{wxDataFormat::GetType}\label{wxdataformatgettype}
|
|
|
|
\constfunc{NativeFormat}{GetType}{\void}
|
|
|
|
Returns the platform-specific number identifying the format.
|
|
|
|
\membersection{wxDataFormat::SetId}\label{wxdataformatsetid}
|
|
|
|
\func{void}{SetId}{\param{const wxChar }{*format}}
|
|
|
|
Sets the format to be the custom format identified by the given name.
|
|
|
|
\membersection{wxDataFormat::SetType}\label{wxdataformatsettype}
|
|
|
|
\func{void}{SetType}{\param{NativeFormat}{ format}}
|
|
|
|
Sets the format to the given value, which should be one of wxDF\_XXX constants.
|
|
|