curs_window(3X)                                             curs_window(3X)


   NAME
         curswindow:  newwin, delwin, mvwin, subwin, derwin, mvderwin,
         dupwin, wsyncup, syncok, wcursyncup, wsyncdown  - create curses
         windows

   SYNOPSIS
         #include <curses.h>

         WINDOW *newwin(int nlines, int ncols, int beginy,
               intbeginx);

         int delwin(WINDOW *win);
         int mvwin(WINDOW *win, int y, int x);
         WINDOW *subwin(WINDOW *orig, int nlines, int ncols,
               int beginy, int beginx);
         WINDOW *derwin(WINDOW *orig, int nlines, int ncols,
               int beginy, int beginx);
         int mvderwin(WINDOW *win, int pary, int parx);
         WINDOW *dupwin(WINDOW *win);
         void wsyncup(WINDOW *win);
         int syncok(WINDOW *win, bool bf);
         void wcursyncup(WINDOW *win);
         void wsyncdown(WINDOW *win);

   DESCRIPTION
         The newwin routine creates and returns a pointer to a new window with
         the given number of lines, nlines, and columns, ncols.  The upper
         left-hand corner of the window is at line begin_y, column begin_x.
         If either nlines or ncols is zero, they default to LINES - begin_y
         and COLS - begin_x.  A new full-screen window is created by calling
         newwin(0,0,0,0).

         The delwin routine deletes the named window, freeing all memory
         associated with it.  Subwindows must be deleted before the main
         window can be deleted.

         The mvwin routine moves the window so that the upper left-hand corner
         is at position (x, y).  If the move would cause the window to be off
         the screen, it is an error and the window is not moved.  Moving
         subwindows is allowed, but should be avoided.

         The subwin routine creates and returns a pointer to a new window with
         the given number of lines, nlines, and columns, ncols.  The window is
         at position (begin_y, begin_x) on the screen.  (This position is
         relative to the screen, and not to the window orig.)  The window is
         made in the middle of the window orig, so that changes made to one
         window will affect both windows.  The subwindow shares memory with
         the window orig.  When using this routine, it is necessary to call
         touchwin or touchline on orig before calling wrefresh on the
         subwindow.



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   curs_window(3X)                                             curs_window(3X)


         The derwin routine is the same as subwin, except that begin_y and
         begin_x are relative to the origin of the window orig rather than the
         screen.  There is no difference between the subwindows and the
         derived windows.

         The mvderwin routine moves a derived window (or subwindow) inside its
         parent window.  The screen-relative parameters of the window are not
         changed.  This routine is used to display different parts of the
         parent window at the same physical position on the screen.

         The dupwin routine creates an exact duplicate of the window win.

         Each curses window maintains two data structures: the character image
         structure and the status structure.  The character image structure is
         shared among all windows in the window hierarchy (i.e., the window
         with all subwindows).  The status structure, which contains
         information about individual line changes in the window, is private
         to each window.  The routine wrefresh uses the status data structure
         when performing screen updating.  Since status structures are not
         shared, changes made to one window in the hierarchy may not be
         properly reflected on the screen.

         The routine wsyncup causes the changes in the status structure of a
         window to be reflected in the status structures of its ancestors.  If
         syncok is called with second argument TRUE then wsyncup is called
         automatically whenever there is a change in the window.

         The routine wcursyncup updates the current cursor position of all the
         ancestors of the window to reflect the current cursor position of the
         window.

         The routine wsyncdown updates the status structure of the window to
         reflect the changes in the status structures of its ancestors.
         Applications seldom call this routine because it is called
         automatically by wrefresh.

   RETURN VALUE
         Routines that return an integer return the integer ERR upon failure
         and an integer value other than ERR upon successful completion.

         delwin returns the integer ERR upon failure and OK upon successful
         completion.

         Routines that return pointers return NULL on error.

   NOTES
         The header file <curses.h> automatically includes the header files
         <stdio.h> and <unctrl.h>.





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   curs_window(3X)                                             curs_window(3X)


         If many small changes are made to the window, the wsyncup option
         could degrade performance.

         Note that syncok may be a macro.

   SEE ALSO
         curses(3X), cursrefresh(3X), curstouch(3X).














































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