$NetBSD: intro.4,v 1.4 1998/01/09 04:12:13 perry Exp $
Copyright (c) 1980, 1993
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)intro.4 8.1 (Berkeley) 6/4/93
.sh 1 "Cursor Movement Optimizations" .pp One of the most difficult things to do properly is motion optimization. After using .Fn gettmode and .Fn setterm to get the terminal descriptions, the function .Fn mvcur deals with this task. It usage is simple: simply tell it where you are now and where you want to go. For example .(l mvcur(0\*,0\*,LINES/2\*,COLS/2); .)l .lp would move the cursor from the home position (0\*,0) to the middle of the screen. If you wish to force absolute addressing, you can use the function .Fn tgoto from the .b termlib (7) routines, or you can tell .Fn mvcur that you are impossibly far away, For example, to absolutely address the lower left hand corner of the screen from anywhere just claim that you are in the upper right hand corner: .(l mvcur(0\*,COLS-1\*,LINES-1\*,0); .)l
Copyright (c) 1980, 1993
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)intro.4 8.1 (Berkeley) 6/4/93
.sh 1 "Cursor Movement Optimizations" .pp One of the most difficult things to do properly is motion optimization. After using .Fn gettmode and .Fn setterm to get the terminal descriptions, the function .Fn mvcur deals with this task. It usage is simple: simply tell it where you are now and where you want to go. For example .(l mvcur(0\*,0\*,LINES/2\*,COLS/2); .)l .lp would move the cursor from the home position (0\*,0) to the middle of the screen. If you wish to force absolute addressing, you can use the function .Fn tgoto from the .b termlib (7) routines, or you can tell .Fn mvcur that you are impossibly far away, For example, to absolutely address the lower left hand corner of the screen from anywhere just claim that you are in the upper right hand corner: .(l mvcur(0\*,COLS-1\*,LINES-1\*,0); .)l