Subject: lib/26660: libcurses 'curscr' contains the wrong information
To: None <email@example.com>
From: None <firstname.lastname@example.org>
Date: 08/14/2004 15:50:51
>Synopsis: libcurses 'curscr' contains the wrong information
>Arrival-Date: Sat Aug 14 15:09:01 UTC 2004
>Originator: David Laight
>Release: NetBSD 2.0 current
Other curses implementations use 'curscr' for the screen image
that has been processed by wnoutrefresh(). NetBSD's curses
uses the internal structure __virtscr for that and uses 'curscr'
for the image processed bu doupdate() - ie the data that is actually
on the screen display.
wrefresh(stdscr) is also expected to re-output the entire screen
(eg if it has been corrupted by non-curses output).
Run code that uses the (almost) portable code below to perform
a 'pop up box' without corrupting the underlying screen, and without
knowing which WINDOWs need to be refreshed in which order to redraw
the screen image.
popup_win = newwin( ... );
sv_win = dupwin(popup_win);
.... do display in popup_win ...
only works if preceded by a doupdate() call.
Completely redo all the refresh handling...