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authorPeter Wemm <peter@FreeBSD.org>1999-08-24 01:06:48 +0000
committerPeter Wemm <peter@FreeBSD.org>1999-08-24 01:06:48 +0000
commit0e3d540892016a47f6a68ec9ba2879d35ce5f7c2 (patch)
treead214c5b2c8142ad6dc6d2ce3a9c83e6317d7f77 /contrib/ncurses/man/form_fieldtype.3x
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Import unmodified (but trimmed) ncurses 5.0 prerelease 990821.vendor/ncurses/5.0-19990821
This contains the full eti (panel, form, menu) extensions. bmake glue to follow. Obtained from: ftp://ftp.clark.net/pub/dickey/ncurses
Notes
Notes: svn path=/vendor/ncurses/dist/; revision=50276 svn path=/vendor/ncurses/5.0-19990821/; revision=50278; tag=vendor/ncurses/5.0-19990821
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+'\" t
+.\"***************************************************************************
+.\" Copyright (c) 1998 Free Software Foundation, Inc. *
+.\" *
+.\" Permission is hereby granted, free of charge, to any person obtaining a *
+.\" copy of this software and associated documentation files (the *
+.\" "Software"), to deal in the Software without restriction, including *
+.\" without limitation the rights to use, copy, modify, merge, publish, *
+.\" distribute, distribute with modifications, sublicense, and/or sell *
+.\" copies of the Software, and to permit persons to whom the Software is *
+.\" furnished to do so, subject to the following conditions: *
+.\" *
+.\" The above copyright notice and this permission notice shall be included *
+.\" in all copies or substantial portions of the Software. *
+.\" *
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+.\" *
+.\" Except as contained in this notice, the name(s) of the above copyright *
+.\" holders shall not be used in advertising or otherwise to promote the *
+.\" sale, use or other dealings in this Software without prior written *
+.\" authorization. *
+.\"***************************************************************************
+.\"
+.\" $Id: form_fieldtype.3x,v 1.7 1998/11/29 01:07:16 Rick.Ohnemus Exp $
+.TH form_field 3X ""
+.SH NAME
+\fBform_fieldtype\fR - define validation-field types
+.SH SYNOPSIS
+\fB#include <form.h>\fR
+.br
+FIELDTYPE *new_fieldtype(
+ bool (* const field_check)(FIELD *, const void *),
+ bool (* const char_check)(int, const void *));
+.br
+int free_fieldtype(FIELDTYPE *fieldtype);
+.br
+int set_fieldtype_arg(
+ FIELDTYPE *fieldtype,
+ void *(* const make_arg)(va_list *),
+ void *(* const copy_arg)(const void *),
+ void (* const free_arg)(void *));
+.br
+int set_fieldtype_choice(
+ FIELDTYPE *fieldtype
+ bool (* const next_choice)(FIELD *, const void *),
+ bool (* const prev_choice)(FIELD *, const void *));
+.br
+FIELDTYPE *link_fieldtype(FIELDTYPE *type1,
+ FIELDTYPE *type2);
+.br
+.SH DESCRIPTION
+The function \fBnew_fieldtype\fR creates a new field type usable for data
+validation. You supply it with \fIfield_check\fR, a predicate to check the
+validity of an entered data string whenever the user attempt to leave a field.
+The (FIELD *) argument is passed in so the validation predicate can see the
+field's buffer, sizes and other attributes; the second argument is an
+argument-block structure, about which more below.
+
+You also supply \fBnew_fieldtype\fR with \fIchar_check\fR,
+a function to validate input characters as they are entered; it will be passed
+the character to be checked and a pointer to an argument-block structure.
+
+The function \fBfree_fieldtype\fR frees the space allocated for a given
+validation type.
+
+The function \fBset_fieldtype\fR associates three storage-management functions
+with a field type. The \fImak_arg\fR function is automatically applied to the
+list of arguments you give \fBset_field_type\fR when attaching validation
+to a field; its job is to bundle these into an allocated argument-block
+object which can later be passed to validation predicated. The other two
+hook arguments should copy and free argument-block structures. They will
+be used by the forms-driver code. You must supply the \fImak_arg\fR function,
+the other two are optional, you may supply NULL for them. In this case it
+is assumed, that \fImak_arg\fR doesn't allocate memory but simply loads the
+argument into a single scalar value.
+
+The form driver requests \fBREQ_NEXT_CHOICE\fR and \fBREQ_PREV_CHOICE\fR assume
+that the possible values of a field form an ordered set, and provide the forms
+user with a way to move through the set. The \fBset_fieldtype_choice\fR
+function allows forms programmers to define successor and predecessor functions
+for the field type. These functions take the field pointer and an
+argument-block structure as arguments.
+.SH RETURN VALUE
+The pointer-valued routines return NULL on error.
+
+The integer-valued routines return one of the following codes on
+error:
+.TP 5
+\fBE_OK\fR
+The routine succeeded.
+.TP 5
+\fBE_SYSTEM_ERROR\fR
+System error occurred (see \fBerrno\fR).
+.TP 5
+\fBE_BAD_ARGUMENT\fR
+Routine detected an incorrect or out-of-range argument.
+.TP 5
+\fBE_CONNECTED\fR
+The field is already connected to a form.
+.SH SEE ALSO
+\fBcurses\fR(3X), \fBform\fR(3X).
+.SH NOTES
+The header file \fB<form.h>\fR automatically includes the header file
+\fB<curses.h>\fR.
+
+All of the \fB(char *)\fR arguments of these functions should actually be
+\fB(void *)\fR. The type has been left uncorrected for strict compatibility
+with System V.
+.SH PORTABILITY
+These routines emulate the System V forms library. They were not supported on
+Version 7 or BSD versions.
+.SH AUTHORS
+Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
+S. Raymond.
+.\"#
+.\"# The following sets edit modes for GNU EMACS
+.\"# Local Variables:
+.\"# mode:nroff
+.\"# fill-column:79
+.\"# End: