Content-type: text/html Man page of is_linetouched

is_linetouched

Section: X/Open Curses Library Functions (3XCURSES)
Updated: 5 Jun 2002
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NAME

is_linetouched, is_wintouched, touchline, touchwin, untouchwin, wtouchln - control window refresh  

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>

bool is_linetouched(WINDOW *win, int line);

bool is_wintouched(WINDOW *win);

int touchline(WINDOW *win, int start, int count);

int touchwin(WINDOW *win);

int untouchwin(WINDOW *win);

int wtouchln(WINDOW *win, int y, int n, int changed);  

PARAMETERS

win Is a pointer to the window in which the refresh is to be controlled or monitored.

line Is the line to be checked for change since refresh.

start Is the starting line number of the portion of the window to make appear changed.

count Is the number of lines in the window to mark as changed.

y Is the starting line number of the portion of the window to make appear changed or not changed.

n Is the number of lines in the window to mark as changed.

changed Is a flag indicating whether to make lines look changed (0) or not changed (1).

 

DESCRIPTION

The touchwin() function marks the entire window as dirty. This makes it appear to X/Open Curses as if the whole window has been changed, thus causing the entire window to be rewritten with the next call to refresh(3XCURSES). This is sometimes necessary when using overlapping windows; the change to one window will not be reflected in the other and, hence will not be recorded.

The touchline() function marks as dirty a portion of the window starting at line start and continuing for count lines instead of the entire window. Consequently, that portion of the window is updated with the next call to refresh().

The untouchwin() function marks all lines in the window as unchanged since the last refresh, ensuring that it is not updated.

The wtouchln() function marks n lines starting at line y as either changed (changed=1) or unchanged (changed=0) since the last refresh.

To find out which lines or windows have been changed since the last refresh, use the is_linetouched() and is_wintouched() functions, respectively. These return TRUE if the specified line or window have been changed since the last call to refresh() or FALSE if no changes have been made.  

RETURN VALUES

On success, these functions return OK. Otherwise, they return ERR.  

ERRORS

None.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityStandard
MT-LevelUnsafe

 

SEE ALSO

doupdate(3XCURSES), libcurses(3XCURSES), attributes(5), standards(5)


 

Index

NAME
SYNOPSIS
PARAMETERS
DESCRIPTION
RETURN VALUES
ERRORS
ATTRIBUTES
SEE ALSO

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Time: 02:39:09 GMT, October 02, 2010