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29 * @Id: curs_overlay.3x,v 1.18 2015/07/21 00:51:31 tom Exp @
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41 <H1 class="no-header">curs_overlay 3x</H1>
43 <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG> <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG>
49 <H2><a name="h2-NAME">NAME</a></H2><PRE>
50 <STRONG>overlay</STRONG>, <STRONG>overwrite</STRONG>, <STRONG>copywin</STRONG> - overlay and manipulate
51 overlapped <STRONG>curses</STRONG> windows
55 <H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
56 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
58 <STRONG>int</STRONG> <STRONG>overlay(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>srcwin</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>dstwin</EM><STRONG>);</STRONG>
59 <STRONG>int</STRONG> <STRONG>overwrite(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>srcwin</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>dstwin</EM><STRONG>);</STRONG>
60 <STRONG>int</STRONG> <STRONG>copywin(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>srcwin</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>dstwin</EM><STRONG>,</STRONG> <STRONG>int</STRONG>
61 <EM>sminrow</EM><STRONG>,</STRONG>
62 <STRONG>int</STRONG> <EM>smincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>dminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>dmincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>dmaxrow</EM><STRONG>,</STRONG>
63 <STRONG>int</STRONG> <EM>dmaxcol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>overlay</EM><STRONG>);</STRONG>
67 <H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
70 <H3><a name="h3-overlay_-overwrite">overlay, overwrite</a></H3><PRE>
71 The <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> routines overlay <EM>srcwin</EM> on top
72 of <EM>dstwin</EM>. <EM>scrwin</EM> and <EM>dstwin</EM> are not required to be the
73 same size; only text where the two windows overlap is
74 copied. The difference is that <STRONG>overlay</STRONG> is non-destructive
75 (blanks are not copied) whereas <STRONG>overwrite</STRONG> is destructive.
79 <H3><a name="h3-copywin">copywin</a></H3><PRE>
80 The <STRONG>copywin</STRONG> routine provides a finer granularity of con-
81 trol over the <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> routines. As in the
82 <STRONG>prefresh</STRONG> routine, a rectangle is specified in the destina-
83 tion window, (<EM>dminrow</EM>, <EM>dmincol</EM>) and (<EM>dmaxrow</EM>, <EM>dmaxcol</EM>),
84 and the upper-left-corner coordinates of the source win-
85 dow, (<EM>sminrow</EM>, <EM>smincol</EM>). If the argument <EM>overlay</EM> is <STRONG>true</STRONG>,
86 then copying is non-destructive, as in <STRONG>overlay</STRONG>.
90 <H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
91 Routines that return an integer return <STRONG>ERR</STRONG> upon failure,
92 and <STRONG>OK</STRONG> (SVr4 only specifies "an integer value other than
93 <STRONG>ERR</STRONG>") upon successful completion.
95 X/Open defines no error conditions. In this implementa-
96 tion, <STRONG>copywin</STRONG>, <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> return an error if
97 either of the window pointers are null, or if some part of
98 the window would be placed off-screen.
102 <H2><a name="h2-NOTES">NOTES</a></H2><PRE>
103 Note that <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> may be macros.
107 <H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
108 The XSI Curses standard, Issue 4 describes these functions
109 (adding the const qualifiers). It further specifies their
110 behavior in the presence of characters with multibyte ren-
111 ditions (not yet supported in this implementation).
115 <H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
116 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>
120 <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG>
124 <li><a href="#h2-NAME">NAME</a></li>
125 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
126 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
128 <li><a href="#h3-overlay_-overwrite">overlay, overwrite</a></li>
129 <li><a href="#h3-copywin">copywin</a></li>
132 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
133 <li><a href="#h2-NOTES">NOTES</a></li>
134 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
135 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>