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curs_pad(3curses)
curs_pad(3CURSES) Curses Library Functions curs_pad(3CURSES)
NAME
curs_pad, newpad, subpad, prefresh, pnoutrefresh, pechochar, pechowchar
- create and display curses pads
SYNOPSIS
cc [ flag ... ] file ... -lcurses [ library .. ]
#include <curses.h>
WINDOW *newpad(int nlines, int ncols);
WINDOW *subpad(WINDOW *orig, int nlines, int ncols, int begin_y,
int begin_x);
int prefresh(WINDOW *pad, int pminrow, int pmincol, int sminrow,
int smincol, int smaxrow, int smaxcol);
int pnoutrefresh(WINDOW *pad, int pminrow, int pmincol, int sminrow,
int smincol, int smaxrow, int smaxcol);
int pechochar(WINDOW *pad, chtype ch);
int pechowchar(WINDOW *pad, chtype wch);
DESCRIPTION
The newpad() routine creates and returns a pointer to a new pad data
structure with the given number of lines, nlines, and columns, ncols. A
pad is like a window, except that it is not restricted by the screen
size, and is not necessarily associated with a particular part of the
screen. Pads can be used when a large window is needed, and only a part
of the window will be on the screen at one time. Automatic refreshes of
pads (for example, from scrolling or echoing of input) do not occur. It
is not legal to call wrefresh(3CURSES) with a pad as an argument; the
routines prefresh() or pnoutrefresh() should be called instead. Note
that these routines require additional parameters to specify the part
of the pad to be displayed and the location on the screen to be used
for the display.
The subpad() routine creates and returns a pointer to a subwindow
within a pad with the given number of lines, nlines, and columns,
ncols. Unlike subwin(3CURSES), which uses screen coordinates, the win‐
dow is at position (begin_x, begin_y) on the pad. The window is made in
the middle of the window orig, so that changes made to one window af‐
fect both windows. During the use of this routine, it will often be
necessary to call touchwin(3CURSES) or touchline(3CURSES) on orig be‐
fore calling prefresh().
The prefresh() and pnoutrefresh() routines are analogous to wre‐
fresh(3CURSES) and wnoutrefresh(3CURSES) except that they relate to
pads instead of windows. The additional parameters are needed to indi‐
cate what part of the pad and screen are involved. pminrow and pmincol
specify the upper left-hand corner of the rectangle to be displayed in
the pad. sminrow, smincol, smaxrow, and smaxcol specify the edges of
the rectangle to be displayed on the screen. The lower right-hand cor‐
ner of the rectangle to be displayed in the pad is calculated from the
screen coordinates, since the rectangles must be the same size. Both
rectangles must be entirely contained within their respective struc‐
tures. Negative values of pminrow, pmincol, sminrow, or smincol are
treated as if they were zero.
The pechochar() routine is functionally equivalent to a call to ad‐
dch(3CURSES) followed by a call to refresh(3CURSES), a call to wad‐
dch(3CURSES) followed by a call to wrefresh(3CURSES), or a call to wad‐
dch(3CURSES) followed by a call to prefresh(). The knowledge that only
a single character is being output is taken into consideration and, for
non-control characters, a considerable performance gain might be seen
by using these routines instead of their equivalents. In the case of
pechochar(), the last location of the pad on the screen is reused for
the arguments to prefresh().
RETURN VALUES
Routines that return an integer return ERR upon failure and an integer
value other than ERR 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
addch(3CURSES), curses(3CURSES), refresh(3CURSES), subwin(3CURSES),
touchline(3CURSES), touchwin(3CURSES), waddch(3CURSES), wnoutre‐
fresh(3CURSES), wrefresh(3CURSES), attributes(7)
NOTES
The header file <curses.h> automatically includes the header files
<stdio.h>, <unctrl.h> and <widec.h>.
Note that pechochar() may be a macro.
Oracle Solaris 11.4 31 Dec 1996 curs_pad(3CURSES)