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29 * @Id: curs_touch.3x,v 1.16 2015/12/05 23:43:00 tom Exp @
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41 <H1 class="no-header">curs_touch 3x</H1>
43 <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG> <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG>
48 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
49 <STRONG>touchwin</STRONG>, <STRONG>touchline</STRONG>, <STRONG>untouchwin</STRONG>, <STRONG>wtouchln</STRONG>, <STRONG>is_linetouched</STRONG>,
50 <STRONG>is_wintouched</STRONG> - <STRONG>curses</STRONG> refresh control routines
53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
54 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
55 <STRONG>int</STRONG> <STRONG>touchwin(WINDOW</STRONG> <STRONG>*win);</STRONG>
56 <STRONG>int</STRONG> <STRONG>touchline(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>start,</STRONG> <STRONG>int</STRONG> <STRONG>count);</STRONG>
57 <STRONG>int</STRONG> <STRONG>untouchwin(WINDOW</STRONG> <STRONG>*win);</STRONG>
58 <STRONG>int</STRONG> <STRONG>wtouchln(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>n,</STRONG> <STRONG>int</STRONG> <STRONG>changed);</STRONG>
59 <STRONG>bool</STRONG> <STRONG>is_linetouched(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>line);</STRONG>
60 <STRONG>bool</STRONG> <STRONG>is_wintouched(WINDOW</STRONG> <STRONG>*win);</STRONG>
63 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
64 The <STRONG>touchwin</STRONG> and <STRONG>touchline</STRONG> routines throw away all opti-
65 mization information about which parts of the window have
66 been touched, by pretending that the entire window has
67 been drawn on. This is sometimes necessary when using
68 overlapping windows, since a change to one window affects
69 the other window, but the records of which lines have been
70 changed in the other window do not reflect the change.
71 The routine <STRONG>touchline</STRONG> only pretends that <EM>count</EM> lines have
72 been changed, beginning with line <EM>start</EM>.
74 The <STRONG>untouchwin</STRONG> routine marks all lines in the window as
75 unchanged since the last call to <STRONG>wrefresh</STRONG>.
77 The <STRONG>wtouchln</STRONG> routine makes <EM>n</EM> lines in the window, starting
78 at line <EM>y</EM>, look as if they have (<EM>changed</EM><STRONG>=1</STRONG>) or have not
79 (<EM>changed</EM><STRONG>=0</STRONG>) been changed since the last call to <STRONG>wrefresh</STRONG>.
81 The <STRONG>is_linetouched</STRONG> and <STRONG>is_wintouched</STRONG> routines return <STRONG>TRUE</STRONG>
82 if the specified line/window was modified since the last
83 call to <STRONG>wrefresh</STRONG>; otherwise they return <STRONG>FALSE</STRONG>. In addi-
84 tion, <STRONG>is_linetouched</STRONG> returns <STRONG>ERR</STRONG> if <EM>line</EM> is not valid for
88 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
89 All routines return the integer <STRONG>ERR</STRONG> upon failure and an
90 integer value other than <STRONG>ERR</STRONG> upon successful completion,
91 unless otherwise noted in the preceding routine descrip-
94 X/Open does not define any error conditions. In this im-
97 <STRONG>is_linetouched</STRONG>
98 returns an error if the window pointer is
99 null, or if the line number is outside the
100 window. Note that ERR is distinct from <STRONG>TRUE</STRONG>
101 and <STRONG>FALSE</STRONG>, which are the normal return values
104 <STRONG>wtouchln</STRONG>
105 returns an error if the window pointer is
106 null, or if the line number is outside the
110 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
111 The XSI Curses standard, Issue 4 describes these func-
114 Some historic curses implementations had, as an undocu-
115 mented feature, the ability to do the equivalent of
116 <STRONG>clearok(...,</STRONG> <STRONG>1)</STRONG> by saying <STRONG>touchwin(stdscr)</STRONG> or <STRONG>clear(std-</STRONG>
117 <STRONG>scr)</STRONG>. This will not work under ncurses.
120 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
121 Note that all routines except <STRONG>wtouchln</STRONG> may be macros.
124 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
125 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>.
129 <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG>
133 <li><a href="#h2-NAME">NAME</a></li>
134 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
135 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
136 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
137 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
138 <li><a href="#h2-NOTES">NOTES</a></li>
139 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>