curs_window, delwin, derwin, dupwin, mvderwin, mvwin,
newwin, subwin, syncok, wcursyncup, wsyncdown, wsyncup -
Routines that create Curses windows
#include <curses.h>
int delwin(
WINDOW *win ); WINDOW *derwin(
WINDOW *orig,
int nlines,
int ncols,
int begin_y,
int begin_x ); WINDOW *dupwin(
WINDOW *win ); int mvderwin(
WINDOW *win,
int par_y,
int par_x ); int mvwin(
WINDOW *win,
int y,
int x ); 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 ); int syncok(
WINDOW *win,
bool bf ); void wcursyncup(
WINDOW *win ); void wsyncdown(
WINDOW *win ); void wsyncup(
WINDOW *win );
Curses Library (libcurses)
Interfaces documented on this reference page conform to
industry standards as follows:
delwin, derwin, mvderwin, dupwin, mvwin, newwin, subwin,
syncok, wcursyncup, wsyncdown, wsyncup: XCURSES4.2
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
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 and column begin_x. If nlines is zero,
it defaults to (LINES - begin_y); if ncols is zero, it
defaults to (COLS - begin_x). Applications create a new
full-screen window by calling newwin(0,0,0,0).
The newwin routine must not create a window larger than
the physical size of the screen, or the size defined by
using the environment variables LINES and COLUMNS. Use
pads rather than windows whenever the application requires
a window larger than the terminal screen. See curs_pad(3)
for information about functions that create and manipulate
pads.
The delwin routine deletes the named window, freeing all
memory associated with it. Applications must delete subwindows
before deleting the main window.
The mvwin routine moves the window so that the upper lefthand
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 routine makes the
subwindow in the middle of the window orig, so that
changes made to one window affect both windows. The subwindow
shares memory with the window orig. When using subwin,
applications must call touchwin or touchline on window
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 to the origin of the screen. There
is no other difference between subwindows created by subwin
and derived windows created by derwin.
The mvderwin routine moves a derived window (or a subwindow)
inside its parent window. The screen-relative parameters
of the window are not changed. Applications use this
routine 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 original window and all
associated subwindows). The status structure, which contains
information about individual line changes in the
window, is private to each window. The wrefresh routine
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 wsyncup routine causes the changes in the status
structure of a window to be reflected in the status structures
of its ancestors. If the application calls syncok
with TRUE as the second parameter, then Curses calls wsyncup
automatically whenever there is a change in the window.
The wcursyncup routine updates the current cursor position
of all the ancestors of the specified window to reflect
the current cursor position of the specified window.
The wsyncdown routine updates the status structure of the
specified window to reflect the changes in the status
structures of its ancestors. Applications seldom call this
routine because it is called automatically by wrefresh.
The header file <curses.h> automatically includes the
header file <stdio.h>.
If many small changes are made to a window, using wsyncup
can degrade performance.
Routines that return an integer return the integer ERR
upon failure and OK upon successful completion.
Routines that return pointers return NULL on error.
Functions: curses(3), curs_refresh(3), curs_touch(3)
Others: standards(5)
curs_window(3)
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