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Commit	Line	Data
	1	\section{\class{wxMetafile}}\label{wxmetafile}
	2
	3	A {\bf wxMetafile} represents the MS Windows metafile object, so metafile
	4	operations have no effect in X. In wxWidgets, only sufficient functionality
	5	has been provided for copying a graphic to the clipboard; this may be extended
	6	in a future version. Presently, the only way of creating a metafile
	7	is to use a wxMetafileDC.
	8
	9	\wxheading{Derived from}
	10
	11	\helpref{wxObject}{wxobject}
	12
	13	\wxheading{Include files}
	14
	15	<wx/metafile.h>
	16
	17	\wxheading{See also}
	18
	19	\helpref{wxMetafileDC}{wxmetafiledc}
	20
	21	\latexignore{\rtfignore{\wxheading{Members}}}
	22
	23	\membersection{wxMetafile::wxMetafile}
	24
	25	\func{}{wxMetafile}{\param{const wxString\& }{filename = ""}}
	26
	27	Constructor. If a filename is given, the Windows disk metafile is
	28	read in. Check whether this was performed successfully by
	29	using the \helpref{wxMetafile::Ok}{wxmetafileok} member.
	30
	31	\membersection{wxMetafile::\destruct{wxMetafile}}
	32
	33	\func{}{\destruct{wxMetafile}}{\void}
	34
	35	Destructor.
	36
	37	\membersection{wxMetafile::Ok}\label{wxmetafileok}
	38
	39	\func{bool}{Ok}{\void}
	40
	41	Returns true if the metafile is valid.
	42
	43	\membersection{wxMetafile::Play}\label{wxmetafileplay}
	44
	45	\func{bool}{Play}{\param{wxDC *}{dc}}
	46
	47	Plays the metafile into the given device context, returning
	48	true if successful.
	49
	50	\membersection{wxMetafile::SetClipboard}
	51
	52	\func{bool}{SetClipboard}{\param{int}{ width = 0}, \param{int}{ height = 0}}
	53
	54	Passes the metafile data to the clipboard. The metafile can no longer be
	55	used for anything, but the wxMetafile object must still be destroyed by
	56	the application.
	57
	58	Below is a example of metafile, metafile device context and clipboard use
	59	from the {\tt hello.cpp} example. Note the way the metafile dimensions
	60	are passed to the clipboard, making use of the device context's ability
	61	to keep track of the maximum extent of drawing commands.
	62
	63	\begin{verbatim}
	64	wxMetafileDC dc;
	65	if (dc.Ok())
	66	{
	67	Draw(dc, false);
	68	wxMetafile *mf = dc.Close();
	69	if (mf)
	70	{
	71	bool success = mf->SetClipboard((int)(dc.MaxX() + 10), (int)(dc.MaxY() + 10));
	72	delete mf;
	73	}
	74	}
	75	\end{verbatim}
	76
	77	\section{\class{wxMetafileDC}}\label{wxmetafiledc}
	78
	79	This is a type of device context that allows a metafile object to be
	80	created (Windows only), and has most of the characteristics of a normal
	81	\rtfsp{\bf wxDC}. The \helpref{wxMetafileDC::Close}{wxmetafiledcclose} member must be called after drawing into the
	82	device context, to return a metafile. The only purpose for this at
	83	present is to allow the metafile to be copied to the clipboard (see \helpref{wxMetafile}{wxmetafile}).
	84
	85	Adding metafile capability to an application should be easy if you
	86	already write to a wxDC; simply pass the wxMetafileDC to your drawing
	87	function instead. You may wish to conditionally compile this code so it
	88	is not compiled under X (although no harm will result if you leave it
	89	in).
	90
	91	Note that a metafile saved to disk is in standard Windows metafile format,
	92	and cannot be imported into most applications. To make it importable,
	93	call the function \helpref{::wxMakeMetafilePlaceable}{wxmakemetafileplaceable} after
	94	closing your disk-based metafile device context.
	95
	96	\wxheading{Derived from}
	97
	98	\helpref{wxDC}{wxdc}\\
	99	\helpref{wxObject}{wxobject}
	100
	101	\wxheading{Include files}
	102
	103	<wx/metafile.h>
	104
	105	\wxheading{See also}
	106
	107	\helpref{wxMetafile}{wxmetafile}, \helpref{wxDC}{wxdc}
	108
	109	\latexignore{\rtfignore{\wxheading{Members}}}
	110
	111	\membersection{wxMetafileDC::wxMetafileDC}
	112
	113	\func{}{wxMetafileDC}{\param{const wxString\& }{filename = ""}}
	114
	115	Constructor. If no filename is passed, the metafile is created
	116	in memory.
	117
	118	\membersection{wxMetafileDC::\destruct{wxMetafileDC}}
	119
	120	\func{}{\destruct{wxMetafileDC}}{\void}
	121
	122	Destructor.
	123
	124	\membersection{wxMetafileDC::Close}\label{wxmetafiledcclose}
	125
	126	\func{wxMetafile *}{Close}{\void}
	127
	128	This must be called after the device context is finished with. A
	129	metafile is returned, and ownership of it passes to the calling
	130	application (so it should be destroyed explicitly).
	131