📄 curs_initscr.3x.html
字号:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><!-- **************************************************************************** * Copyright (c) 1998-2003,2005 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * **************************************************************************** * @Id: curs_initscr.3x,v 1.14 2005/05/15 16:18:01 tom Exp @--><HTML><HEAD><TITLE>curs_initscr 3x</TITLE><link rev=made href="mailto:bug-ncurses@gnu.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></HEAD><BODY><H1>curs_initscr 3x</H1><HR><PRE><!-- Manpage converted by man2html 3.0.1 --><STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG> <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG></PRE><H2>NAME</H2><PRE> <STRONG>initscr</STRONG>, <STRONG>newterm</STRONG>, <STRONG>endwin</STRONG>, <STRONG>isendwin</STRONG>, <STRONG>set_term</STRONG>, <STRONG>delscreen</STRONG> - <STRONG>curses</STRONG> screen initialization and manipulation routines</PRE><H2>SYNOPSIS</H2><PRE> <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> <STRONG>WINDOW</STRONG> <STRONG>*initscr(void);</STRONG> <STRONG>int</STRONG> <STRONG>endwin(void);</STRONG> <STRONG>bool</STRONG> <STRONG>isendwin(void);</STRONG> <STRONG>SCREEN</STRONG> <STRONG>*newterm(char</STRONG> <STRONG>*type,</STRONG> <STRONG>FILE</STRONG> <STRONG>*outfd,</STRONG> <STRONG>FILE</STRONG> <STRONG>*infd);</STRONG> <STRONG>SCREEN</STRONG> <STRONG>*set_term(SCREEN</STRONG> <STRONG>*new);</STRONG> <STRONG>void</STRONG> <STRONG>delscreen(SCREEN*</STRONG> <STRONG>sp);</STRONG></PRE><H2>DESCRIPTION</H2><PRE> <STRONG>initscr</STRONG> is normally the first <STRONG>curses</STRONG> routine to call when initializing a program. A few special routines sometimes need to be called before it; these are <STRONG>slk_init</STRONG>, <STRONG>filter</STRONG>, <STRONG>ripoffline</STRONG>, <STRONG>use_env</STRONG>. For multiple-terminal applications, <STRONG>newterm</STRONG> may be called before <STRONG>initscr</STRONG>. The initscr code determines the terminal type and initial- izes all <STRONG>curses</STRONG> data structures. <STRONG>initscr</STRONG> also causes the first call to <STRONG>refresh</STRONG> to clear the screen. If errors oc- cur, <STRONG>initscr</STRONG> writes an appropriate error message to stan- dard error and exits; otherwise, a pointer is returned to <STRONG>stdscr</STRONG>. A program that outputs to more than one terminal should use the <STRONG>newterm</STRONG> routine for each terminal instead of <STRONG>initscr</STRONG>. A program that needs to inspect capabilities, so it can continue to run in a line-oriented mode if the ter- minal cannot support a screen-oriented program, would also use <STRONG>newterm</STRONG>. The routine <STRONG>newterm</STRONG> should be called once for each terminal. It returns a variable of type <STRONG>SCREEN</STRONG> <STRONG>*</STRONG> which should be saved as a reference to that terminal. The arguments are the <EM>type</EM> of the terminal to be used in place of <STRONG>$TERM</STRONG>, a file pointer for output to the terminal, and another file pointer for input from the terminal (if <EM>type</EM> is <STRONG>NULL</STRONG>, <STRONG>$TERM</STRONG> will be used). The program must also call <STRONG>endwin</STRONG> for each terminal being used before exiting from <STRONG>curses</STRONG>. If <STRONG>newterm</STRONG> is called more than once for the same terminal, the first terminal referred to must be the last one for which <STRONG>endwin</STRONG> is called. A program should always call <STRONG>endwin</STRONG> before exiting or es- caping from <STRONG>curses</STRONG> mode temporarily. This routine re- stores tty modes, moves the cursor to the lower left-hand corner of the screen and resets the terminal into the proper non-visual mode. Calling <STRONG>refresh</STRONG> or <STRONG>doupdate</STRONG> after a temporary escape causes the program to resume visual mode. The <STRONG>isendwin</STRONG> routine returns <STRONG>TRUE</STRONG> if <STRONG>endwin</STRONG> has been called without any subsequent calls to <STRONG>wrefresh</STRONG>, and <STRONG>FALSE</STRONG> otherwise. The <STRONG>set_term</STRONG> routine is used to switch between different terminals. The screen reference <STRONG>new</STRONG> becomes the new cur- rent terminal. The previous terminal is returned by the routine. This is the only routine which manipulates <STRONG>SCREEN</STRONG> pointers; all other routines affect only the cur- rent terminal. The <STRONG>delscreen</STRONG> routine frees storage associated with the <STRONG>SCREEN</STRONG> data structure. The <STRONG>endwin</STRONG> routine does not do this, so <STRONG>delscreen</STRONG> should be called after <STRONG>endwin</STRONG> if a par- ticular <STRONG>SCREEN</STRONG> is no longer needed.</PRE><H2>RETURN VALUE</H2><PRE> <STRONG>endwin</STRONG> returns the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> upon successful completion. Routines that return pointers always return <STRONG>NULL</STRONG> on error. X/Open defines no error conditions. In this implementa- tion <STRONG>endwin</STRONG> returns an error if the terminal was not ini- tialized.</PRE><H2>NOTES</H2><PRE> Note that <STRONG>initscr</STRONG> and <STRONG>newterm</STRONG> may be macros.</PRE><H2>PORTABILITY</H2><PRE> These functions are described in the XSI Curses standard, Issue 4. It specifies that portable applications must not call <STRONG>initscr</STRONG> more than once. Old versions of curses, e.g., BSD 4.4, may have returned a null pointer from <STRONG>initscr</STRONG> when an error is detected, rather than exiting. It is safe but redundant to check the return value of <STRONG>initscr</STRONG> in XSI Curses.</PRE><H2>SEE ALSO</H2><PRE> <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>, <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG> <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG></PRE><HR><ADDRESS>Man(1) output converted with<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a></ADDRESS></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -