* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************
- * @Id: curs_clear.3x,v 1.31 2023/07/01 15:43:20 tom Exp @
+ * @Id: curs_clear.3x,v 1.35 2023/09/16 23:34:43 tom Exp @
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts">
-<TITLE>curs_clear 3x 2023-07-01 ncurses 6.4 Library calls</TITLE>
+<TITLE>curs_clear 3x 2023-09-16 ncurses 6.4 Library calls</TITLE>
<link rel="author" href="mailto:bug-ncurses@gnu.org">
</HEAD>
<BODY>
-<H1 class="no-header">curs_clear 3x 2023-07-01 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">curs_clear 3x 2023-09-16 ncurses 6.4 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- <STRONG>erase</STRONG>, <STRONG>werase</STRONG>, <STRONG>clear</STRONG>, <STRONG>wclear</STRONG>, <STRONG>clrtobot</STRONG>, <STRONG>wclrtobot</STRONG>, <STRONG>clrtoeol</STRONG>, <STRONG>wclrtoeol</STRONG>
- - clear all or part of a <STRONG>curses</STRONG> window
+ <STRONG>erase</STRONG>, <STRONG>werase</STRONG>, <STRONG>clear</STRONG>, <STRONG>wclear</STRONG>, <STRONG>clrtobot</STRONG>, <STRONG>wclrtobot</STRONG>, <STRONG>clrtoeol</STRONG>, <STRONG>wclrtoeol</STRONG>
+ - clear all or part of a <EM>curses</EM> window
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
</PRE><H3><a name="h3-erase_werase">erase/werase</a></H3><PRE>
- The <STRONG>erase</STRONG> and <STRONG>werase</STRONG> routines copy blanks to every position in the win-
- dow, clearing the screen.
+ The <STRONG>erase</STRONG> and <STRONG>werase</STRONG> routines copy blanks to every position in the
+ window, clearing the screen.
Blanks created by erasure have the current background rendition (as set
by <STRONG><A HREF="curs_bkgd.3x.html">wbkgdset(3x)</A></STRONG>) merged into them.
standard specifies that they return <STRONG>ERR</STRONG> on failure, but specifies no
error conditions.
- The SVr4.0 manual says that these functions could return "a non-nega-
- tive integer if <STRONG><A HREF="curs_outopts.3x.html">immedok(3x)</A></STRONG> is set", referring to the return-value of
- <STRONG>wrefresh</STRONG>. In that implementation, <STRONG>wrefresh</STRONG> would return a count of the
- number of characters written to the terminal.
+ The SVr4.0 manual says that these functions could return "a non-
+ negative integer if <STRONG><A HREF="curs_outopts.3x.html">immedok(3x)</A></STRONG> is set", referring to the return-value
+ of <STRONG>wrefresh</STRONG>. In that implementation, <STRONG>wrefresh</STRONG> would return a count of
+ the number of characters written to the terminal.
Some historic curses implementations had, as an undocumented feature,
- the ability to do the equivalent of <STRONG>clearok(...,</STRONG> <STRONG>1)</STRONG> by saying <STRONG>touch-</STRONG>
- <STRONG>win(stdscr)</STRONG> or <STRONG>clear(stdscr)</STRONG>. This will not work under ncurses.
+ the ability to do the equivalent of <STRONG>clearok(...,</STRONG> <STRONG>1)</STRONG> by saying
+ <STRONG>touchwin(stdscr)</STRONG> or <STRONG>clear(stdscr)</STRONG>. This will not work under ncurses.
- This implementation, and others such as Solaris, sets the current posi-
- tion to 0,0 after erasing via <STRONG>werase</STRONG> and <STRONG>wclear</STRONG>. That fact is not doc-
- umented in other implementations, and may not be true of implementa-
- tions which were not derived from SVr4 source.
+ This implementation, and others such as Solaris, sets the current
+ position to 0,0 after erasing via <STRONG>werase</STRONG> and <STRONG>wclear</STRONG>. That fact is not
+ documented in other implementations, and may not be true of
+ implementations which were not derived from SVr4 source.
Not obvious from the description, most implementations clear the screen
after <STRONG>wclear</STRONG> even for a subwindow or derived window. If you do not
-ncurses 6.4 2023-0
7-01 <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>
+ncurses 6.4 2023-0
9-16 <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
projects / ncurses.git / blobdiff