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newpad(3xcurses)

newpad(3XCURSES)        X/Open Curses Library Functions       newpad(3XCURSES)

NAME
       newpad,  pnoutrefresh,  prefresh,  subpad  - create or refresh a pad or
       subpad

SYNOPSIS
       cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib \
       -R /usr/xpg4/lib -lcurses [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       WINDOW *newpad(int nlines, int ncols);


       int pnoutrefresh(WINDOW *pad, int pminrow, int pmincol, int sminrow,
            int smincol,int smaxrow, int smaxcol);


       int prefresh(WINDOW *pad, int pminrow, int pmincol, int sminrow,
            int smincol,int smaxrow, int smaxcol);


       WINDOW *subpad(WINDOW *orig, int nlines, int ncols);

PARAMETERS
       nlines     Is the number of lines in the pad to be created.


       ncols      Is the number of columns in the pad to be created.


       pad        Is a pointer to the pad to refresh.


       pminrow    Is the row coordinate of the upper left corner  of  the  pad
                  rectangle to be copied


       pmincol    Is the column coordinate of the upper left corner of the pad
                  rectangle to be copied.


       sminrow    Is  the  row coordinate of the upper left corner of the rec‐
                  tangle on the physical screen where pad is to be positioned.


       smincol    Is the column coordinate of the upper  left  corner  of  the
                  rectangle  on  the  physical screen where pad is to be posi‐
                  tioned.


       smaxrow    Is the row coordinate of the lower right corner of the  rec‐
                  tangle  on  the physical screen where the pad is to be posi‐
                  tioned.


       smaxcol    Is the column coordinate of the lower right  corner  of  the
                  rectangle  on the physical screen where the pad is to be po‐
                  sitioned.


       orig       Is a pointer to the parent pad within  which  a  sub-pad  is
                  created.


DESCRIPTION
       The  newpad()  function  creates a new pad with the specified number of
       lines and columns. A pointer to the new pad structure  is  returned.  A
       pad  differs  from a window in that it is not restricted to the size of
       the physical screen. It is useful when only part of a large window will
       be displayed at any one time.


       Automatic refreshes by scrolling or echoing of input do not take  place
       when  pads  are  used. Pads have their own refresh commands, prefresh()
       and pnoutrefresh().


       The prefresh() function copies the specified portion of the logical pad
       to the terminal screen. The parameters pmincol and pminrow specify  the
       upper  left  corner of the rectangular area of the pad to be displayed.
       The lower right coordinate of the rectangular area of the pad  that  is
       to  be  displayed  is  calculated  from the screen parameters (sminrow,
       smincol, smaxrow, smaxcol).


       This function calls the pnoutrefresh() function to copy  the  specified
       portion  of pad to the terminal screen and the doupdate(3XCURSES) func‐
       tion to do the actual update. The logical cursor is copied to the  same
       location in the physical window unless leaveok(3XCURSES) is enabled (in
       which  case,  the cursor is placed in a position that the program finds
       convenient).


       When outputting several pads at once, it is  often  more  efficient  to
       call  the  pnoutrefresh()  and doupdate() functions directly. A call to
       pnoutrefresh() for each pad first, followed by only one call  to  doup‐
       date()  to  update  the  screen,  results in one burst of output, fewer
       characters sent, and less CPU time used.


       The subpad() function creates a sub-pad within the pad  orig  with  the
       specified  number of lines and columns. A pointer to the new pad struc‐
       ture is returned. The sub-pad is positioned in the middle of orig.  Any
       changes  made to one pad affect the other. touchwin(3XCURSES) or touch‐
       line(3XCURSES) will likely have to be called on pad orig  to  correctly
       update the window.

RETURN VALUES
       On  success,  the  newpad() and subpad() functions returns a pointer to
       the new pad data structure. Otherwise, they return a null pointer.


       On success, the pnoutrefresh() and prefresh() functions return OK. Oth‐
       erwise, they return ERR.

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  _ Interface StabilityCommitted _ MT-LevelUnsafe _ Stan‐
       dardSee standards(7).


SEE ALSO
       clearok(3XCURSES),    doupdate(3XCURSES),     is_linetouched(3XCURSES),
       libcurses(3XCURSES), pechochar(3XCURSES), attributes(7), standards(7)

Oracle Solaris 11.4               5 Jun 2002                  newpad(3XCURSES)
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