Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astro.louisville.edu/software/sbig/archive/xmccd-4.1/xmccd-4.1e/xpa-2.1.14/man/mann/xpaconvert.n Дата изменения: Fri Jun 8 07:13:21 2012 Дата индексирования: Thu Feb 27 22:59:05 2014 Кодировка: Поисковые слова: arp 220

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.\" ========================================================================
.\"
.IX Title "xpaconvert n"
.TH xpaconvert n "June 7, 2012" "version 2.1.14" "SAORD Documentation"
.SH "NAME"
\&\fBXPAConvert: Converting the XPA API to 2.0\fR
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
This document describes tips for converting from xpa 1.0 (Xt\-based
xpa) to xpa 2.0 (socket\-based xpa).
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The following are tips for converting from xpa 1.0 (Xt\-based xpa) to
xpa 2.0 (socket\-based xpa). The changes are straight-forward and
almost can be done automatically (we used editor macros for most of
the conversion).
.IP "\(bu" 4
The existence of the cpp \s-1XPA_VERSION\s0 directive to distinguish between 1.0
(where it is not defined) and 2.0 (where it is defined).
.IP "\(bu" 4
Remove the first widget argument from all send and receive server
callbacks. Also change first 2 arguments from XtPointer to void
*. For example:
.Sp
#ifdef \s-1XPA_VERSION\s0
static void XPAReceiveFile(client_data, call_data, paramlist, buf, len)
void *client_data;
void *call_data;
char *paramlist;
char *buf;
int len;
#else
static void XPAReceiveFile(w, client_data, call_data, paramlist, buf, len)
Widget w;
XtPointer client_data;
XtPointer call_data;
char *paramlist;
char *buf;
int len;
#endif
.IP "\(bu" 4
Server callbacks should be declared as returning int instead
of void. They now should return 0 for no errors, \-1 for error.
.IP "\(bu" 4
The mode flags have changed when defining \s-1XPA\s0 server callbacks.
The old \fIS\fR flag (save buffer) is replaced by \fIfreebuf=false\fR.
The old \fIE\fR flag (empty buffer is \s-1OK\s0) is no longer used (it
was an artifact of the X implementation).
.IP "\(bu" 4
Change \fINewXPACommand()\fR to \fIXPAcmdNew()\fR, with the new calling sequence:
.Sp
.Vb 1
\& xpa = NewXPACommand(toplevel, NULL, prefix, NULL);
.Ve
.Sp
is changed to:
.Sp
.Vb 1
\& xpa = XPACmdNew(xclass, name);
.Ve
.IP "\(bu" 4
Change the \fIAddXPACommand()\fR subroutine name to XPACmdAdd (with the same
calling sequence):
.Sp
.Vb 3
\& AddXPACommand(xpa, "file",
\& "\etdisplay a new file\en\et\et requires: filename",
\& NULL, NULL, NULL, XPAReceiveFile, text, NULL);
.Ve
.Sp
is changed to:
.Sp
.Vb 3
\& XPACmdAdd(xpa, "file",
\& "\etdisplay a new file\en\et\et requires: filename",
\& NULL, NULL, NULL, XPAReceiveFile, text, NULL);
.Ve
.IP "\(bu" 4
The \fIXPAXtAppInput()\fR routine should be called just before \fIXtAppMainLoop()\fR
to add xpa fds to the Xt event loop:
.Sp
.Vb 2
\& /* add the xpas to the Xt loop */
\& XPAXtAddInput(app, NULL);
.Ve
.Sp
.Vb 2
\& /* process events */
\& XtAppMainLoop(app);
.Ve
.IP "\(bu" 4
Change \fINewXPA()\fR to \fIXPANew()\fR and call \fIXPAXtAddInput()\fR if the XtAppMainLoop
routine already has been entered:
.Sp
.Vb 4
\& xpa = NewXPA(saotng->xim->toplevel, prefix, xparoot,
\& "FITS data or image filename\en\et\et options: file type",
\& XPASendData, new, NULL,
\& XPAReceiveData, new, "SE");
.Ve
.Sp
is changed to:
.Sp
.Vb 6
\& sprintf(tbuf, "%s.%s", prefix, xparoot);
\& xpa = XPANew("SAOTNG", tbuf,
\& "FITS data or image filename\en\et\et options: file type",
\& XPASendData, new, NULL,
\& XPAReceiveData, new, "SE");
\& XPAXtAddInput(XtWidgetToApplicationContext(saotng->xim->toplevel), xpa);
.Ve
.IP "\(bu" 4
Change \fIXPAInternalReceiveCommand()\fR to \fIXPACmdInternalReceive()\fR
remove first argument in the calling sequence):
.Sp
.Vb 3
\& XPAInternalReceiveCommand(im->saotng->xim->toplevel,
\& im->saotng, im->saotng->commands,
\& "zoom reset", NULL, 0);
.Ve
.Sp
is changed to:
.Sp
.Vb 2
\& XPACmdInternalReceive(im->saotng, im->saotng->commands,
\& "zoom reset", NULL, 0);
.Ve
.IP "\(bu" 4
Change DestroyXPA to XPAFree:
.Sp
.Vb 1
\& DestroyXPA(im->dataxpa);
.Ve
.Sp
is changed to:
.Sp
.Vb 1
\& XPAFree(im->dataxpa);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
See xpa(n) for a list of \s-1XPA\s0 help pages