is_term_resized

resizeterm(3X)						       resizeterm(3X)



NAME
       is_term_resized,	 resize_term, resizeterm - change the curses terminal
       size

SYNOPSIS
       #include <curses.h>

       bool is_term_resized(int lines, int columns);
       int resize_term(int lines, int columns);
       int resizeterm(int lines, int columns);

DESCRIPTION
       This is an extension to the curses library.  It provides callers	 with
       a  hook	into the ncurses data to resize windows, primarily for use by
       programs running in an X Window terminal (e.g., xterm).	The  function
       resizeterm  resizes  the standard and current windows to the specified
       dimensions, and adjusts other bookkeeping data  used  by	 the  ncurses
       library that record the window dimensions.

       Most of the work is done by the inner function resize_term.  The outer
       function resizeterm adds bookkeeping for the SIGWINCH  handler.	 When
       resizing	 the  windows,	resize_term  blank-fills  the  areas that are
       extended.  The calling application should fill  in  these  areas	 with
       appropriate  data.   The	 resize_term  function attempts to resize all
       windows.	 However, due to the calling convention of pads,  it  is  not
       possible	 to  resize  these  without  additional	 interaction with the
       application.

       A support function is_term_resized is provided  so  that	 applications
       can  check  if the resize_term function would modify the window struc-
       tures.  It returns TRUE if the windows would be	modified,  and	FALSE
       otherwise.

RETURN VALUE
       Except  as  notes,  these function return the integer ERR upon failure
       and OK on success.  They will fail if either  of	 the  dimensions  are
       less than or equal to zero, or if an error occurs while (re)allocating
       memory for the windows.

NOTES
       While these functions are intended to be used to support a signal han-
       dler (i.e., for SIGWINCH), care should be taken to avoid invoking them
       in a context where malloc or realloc may have been interrupted,	since
       it uses those functions.

       If  ncurses  is	configured  to	supply	its own SIGWINCH handler, the
       resizeterm function ungetch’s a KEY_RESIZE which will be read  on  the
       next  call  to  getch.	This is used to alert an application that the
       screen size has changed, and that it should repaint  special  features
       such as pads that cannot be done automatically.

SEE ALSO
       wresize(3X).

AUTHOR
       Thomas  Dickey  (from  an  equivalent function written in 1988 for BSD
       curses).



							       resizeterm(3X)