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newwin(3curses)

curs_window(3CURSES)       Curses Library Functions       curs_window(3CURSES)



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

SYNOPSIS
       cc [ flag ... ] file ... -lcurses [ library ... ]
       #include <curses.h>

       WINDOW *newwin(int nlines, int ncols, int begin_y, int begin_x);


       int delwin(WINDOW *win);


       int mvwin(WINDOW *win, int y, int x);


       WINDOW *subwin(WINDOW *orig, int nlines, int ncols,
            int begin_y, int begin_x);


       WINDOW *derwin(WINDOW *orig, int nlines, int ncols,
            int begin_y, int begin_x);


       int mvderwin(WINDOW *win, int par_y, int par_x);


       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 asso‐
       ciated 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  touch‐
       line() on orig before calling wrefresh() on the subwindow.


       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 (that is, 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. Applica‐
       tions seldom call this routine because it is  called  automatically  by
       wrefresh().

RETURN VALUES
       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.

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ MT-LevelUnsafe


SEE ALSO
       curs_touch(3CURSES),      curs_refresh(3CURSES),       curses(3CURSES),
       attributes(7)

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


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


       Note that syncok() may be a macro.



Oracle Solaris 11.4               31 Dec 1996             curs_window(3CURSES)
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