NAME
newwin, subwin — window creation functions
SYNOPSIS
#include <curses.h>
WINDOW *newwin(int nlines, int ncols, int begin_y, int begin_x);
WINDOW *subwin(WINDOW *orig, int nlines, int ncols, int begin_y,
int begin_x);
DESCRIPTION
The
newwin()
function creates a new window with nlines lines and ncols columns,
positioned so that the origin is (begin_y, begin_x). If
nlines is zero, it defaults to
LINES
- begin_y; if ncols is zero, it defaults to
COLS
- begin_x.
The
subwin()
function creates a new window with nlines lines and ncols columns,
positioned so that the origin is at (begin_y, begin_x). (This
position is an absolute screen position, not a position relative to the window
orig.) If any part of the new window is outside orig,
the function fails and the window is not created.
RETURN VALUE
Upon successful completion, these functions
return a pointer to the new window. Otherwise, they return a null pointer.
ERRORS
No errors are defined.
APPLICATION USAGE
Before performing the first refresh of a subwindow, portable applications
should call
touchwin()
or
touchline()
on the parent window.
Each window maintains internal descriptions of the screen image and status.
The screen image is shared among all windows in the window hierarchy. Refresh
operations rely on information on what has changed within a window, which is
private to each window. Refreshing a window, when updates were made to a
different window, may fail to perform needed updates because the windows do
not share this information.
A new full-screen window is created by calling:
CHANGE HISTORY
First released in Issue 2
X/Open Curses, Issue 4
The entry is rewritten for clarity.
Printable version
