109 lines
4.7 KiB
Plaintext
109 lines
4.7 KiB
Plaintext
'\" t
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.\"***************************************************************************
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.\" Copyright 2018,2020 Thomas E. Dickey *
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.\" Copyright 1998-2010,2015 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: form_field_new.3x,v 1.24 2020/10/24 09:09:18 tom Exp $
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.TH form_field_new 3X ""
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.SH NAME
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\fBnew_field\fR,
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\fBdup_field\fR,
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\fBlink_field\fR,
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\fBfree_field\fR \- create and destroy form fields
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.SH SYNOPSIS
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\fB#include <form.h>\fR
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.sp
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\fBFIELD *new_field(int \fP\fIheight\fP\fB, int \fP\fIwidth\fP\fB,\fP
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\fBint \fP\fItoprow\fP\fB, int \fP\fIleftcol\fP\fB,\fP
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\fBint \fP\fIoffscreen\fP\fB, int \fP\fInbuffers\fP\fB);\fP
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.br
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\fBFIELD *dup_field(FIELD *\fP\fIfield\fP\fB, int \fP\fItoprow\fP\fB, int \fP\fIleftcol\fP\fB);\fP
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.br
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\fBFIELD *link_field(FIELD *\fP\fIfield\fP\fB, int \fP\fItoprow\fP\fB, int \fP\fIleftcol\fP\fB);\fP
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.br
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\fBint free_field(FIELD *\fP\fIfield\fP\fB);\fP
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.br
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.SH DESCRIPTION
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The function \fBnew_field\fR allocates a new field and initializes it from the
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parameters given: height, width, row of upper-left corner, column of upper-left
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corner, number off-screen rows, and number of additional working buffers.
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.PP
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The function \fBdup_field\fR duplicates a field at a new location.
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Most
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attributes (including current contents, size, validation type, buffer count,
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growth threshold, justification, foreground, background, pad character,
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options, and user pointer) are copied.
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Field status and the field page bit are
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not copied.
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.PP
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The function \fBlink_field\fR acts like \fBdup_field\fR, but the new field
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shares buffers with its parent.
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Attribute data is separate.
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.PP
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The function \fBfree_field\fR de-allocates storage associated with a field.
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.SH RETURN VALUE
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The functions \fBnew_field\fR, \fBdup_field\fR, \fBlink_field\fR return
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\fBNULL\fR on error.
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They set \fBerrno\fP according to their success:
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.TP 5
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.B E_OK
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The routine succeeded.
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.TP 5
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.B E_BAD_ARGUMENT
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Routine detected an incorrect or out-of-range argument.
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.TP 5
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.B E_SYSTEM_ERROR
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System error occurred, e.g., malloc failure.
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.PP
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The function \fBfree_field\fR returns one of the following:
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.TP 5
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.B E_OK
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The routine succeeded.
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.TP 5
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.B E_BAD_ARGUMENT
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Routine detected an incorrect or out-of-range argument.
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.TP 5
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.B E_CONNECTED
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field is connected.
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.SH SEE ALSO
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\fBcurses\fR(3X), \fBform\fR(3X).
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.SH NOTES
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The header file \fB<form.h>\fR automatically includes the header file
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\fB<curses.h>\fR.
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.SH PORTABILITY
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These routines emulate the System V forms library.
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They were not supported on
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Version 7 or BSD versions.
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.PP
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It may be unwise to count on the set of attributes copied by
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\fBdup_field\fR being portable; the System V forms library documents are
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not very explicit about what gets copied and what does not.
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.SH AUTHORS
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Juergen Pfeifer.
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Manual pages and adaptation for new curses by Eric S. Raymond.
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