ncurses 6.0 - patch 20160820
[ncurses.git] / doc / html / man / form_field_new.3x.html
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30   * @Id: form_field_new.3x,v 1.19 2015/12/05 23:42:45 tom Exp @
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37 <TITLE>form_field_new 3x</TITLE>
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41 <BODY>
42 <H1 class="no-header">form_field_new 3x</H1>
43 <PRE>
44 <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>                                   <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
45
46
47
48
49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
50        <STRONG>new_field</STRONG>,  <STRONG>dup_field</STRONG>, <STRONG>link_field</STRONG>, <STRONG>free_field</STRONG> - create and
51        destroy form fields
52
53
54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
55        <STRONG>#include</STRONG> <STRONG>&lt;form.h&gt;</STRONG>
56        FIELD *new_field(int height, int width,
57                         int toprow, int leftcol,
58                         int offscreen, int nbuffers);
59        FIELD *dup_field(FIELD *field, int toprow, int leftcol);
60        FIELD *link_field(FIELD *field, int toprow, int leftcol);
61        int free_field(FIELD *field);
62
63
64 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
65        The function <STRONG>new_field</STRONG> allocates a new field and  initial-
66        izes  it  from the parameters given: height, width, row of
67        upper-left corner, column  of  upper-left  corner,  number
68        off-screen rows, and number of additional working buffers.
69
70        The  function  <STRONG>dup_field</STRONG> duplicates a field at a new loca-
71        tion.  Most attributes (including current contents,  size,
72        validation  type, buffer count, growth threshold, justifi-
73        cation, foreground, background,  pad  character,  options,
74        and  user pointer) are copied.  Field status and the field
75        page bit are not copied.
76
77        The function <STRONG>link_field</STRONG> acts like <STRONG>dup_field</STRONG>, but  the  new
78        field  shares  buffers with its parent.  Attribute data is
79        separate.
80
81        The function <STRONG>free_field</STRONG>  de-allocates  storage  associated
82        with a field.
83
84
85 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
86        The function, <STRONG>new_field</STRONG>, <STRONG>dup_field</STRONG>, <STRONG>link_field</STRONG> return <STRONG>NULL</STRONG>
87        on error.  They set errno according to their success:
88
89        <STRONG>E_OK</STRONG> The routine succeeded.
90
91        <STRONG>E_BAD_ARGUMENT</STRONG>
92             Routine detected an incorrect or  out-of-range  argu-
93             ment.
94
95        <STRONG>E_SYSTEM_ERROR</STRONG>
96             System error occurred, e.g., malloc failure.
97
98        The function <STRONG>free_field</STRONG> returns one of the following:
99
100        <STRONG>E_OK</STRONG> The routine succeeded.
101
102        <STRONG>E_BAD_ARGUMENT</STRONG>
103             Routine  detected  an incorrect or out-of-range argu-
104             ment.
105
106        <STRONG>E_CONNECTED</STRONG>
107             field is connected.
108
109
110 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
111        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>.
112
113
114 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
115        The header file <STRONG>&lt;form.h&gt;</STRONG> automatically includes the header
116        file <STRONG>&lt;curses.h&gt;</STRONG>.
117
118
119 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
120        These  routines  emulate the System V forms library.  They
121        were not supported on Version 7 or BSD versions.
122
123        It may be unwise to count on the set of attributes  copied
124        by  <STRONG>dup_field</STRONG>  being  portable; the System V forms library
125        documents are not very explicit about what gets copied and
126        what does not.
127
128
129 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
130        Juergen  Pfeifer.   Manual  pages  and  adaptation for new
131        curses by Eric S. Raymond.
132
133
134
135                                                      <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
136 </PRE>
137 <div class="nav">
138 <ul>
139 <li><a href="#h2-NAME">NAME</a></li>
140 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
141 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
142 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
143 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
144 <li><a href="#h2-NOTES">NOTES</a></li>
145 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
146 <li><a href="#h2-AUTHORS">AUTHORS</a></li>
147 </ul>
148 </div>
149 </BODY>
150 </HTML>