|
|
Curses Example - ncurses Tutorial
Below is a simple ncurses example, which will draw a ncurses-screen, display some info in it (the
current time and date). Press "q" to exit the example.
Compilation:
Use the Makefile to compile ncurses.c. Now run "ncurses".
Troubleshooting:
Once I had a very strange behaviour of curses:
"Everything is printed as expected (incl. the screen-box), but
as soon as getch() in the while loop is reached, the screen-box disappears."
The solution was to add "refresh();" after "nodelay" in "screen_init". This does not apply
here however, but just in case.
ncurses.c
#include <time.h>
#include <curses.h>
int current_getch;
int doloop = 1;
static WINDOW *mainwnd;
static WINDOW *screen;
WINDOW *my_win;
int now_sec, now_min, now_hour, now_day, now_wday, now_month, now_year;
time_t now;
struct tm *now_tm;
void screen_init(void) {
mainwnd = initscr();
noecho();
cbreak();
nodelay(mainwnd, TRUE);
refresh(); // 1)
wrefresh(mainwnd);
screen = newwin(13, 27, 1, 1);
box(screen, ACS_VLINE, ACS_HLINE);
}
static void update_display(void) {
curs_set(0);
mvwprintw(screen,1,1,"-------- HEADER --------");
mvwprintw(screen,3,6,"TIME: %d:%d:%d", now_hour, now_min, now_sec);
mvwprintw(screen,5,6,"DATE: %d-%d-%d", now_day, now_month, now_year);
mvwprintw(screen,7,6,"PRESS q TO END");
mvwprintw(screen,10,1,"-------- FOOTER --------");
wrefresh(screen);
refresh();
}
void screen_end(void) {
endwin();
}
void maketime(void) {
// Get the current date/time
now = time (NULL);
now_tm = localtime (&now);
now_sec = now_tm->tm_sec;
now_min = now_tm->tm_min;
now_hour = now_tm->tm_hour;
now_day = now_tm->tm_mday;
now_wday = now_tm->tm_wday;
now_month = now_tm->tm_mon + 1;
now_year = now_tm->tm_year + 1900;
}
int main(void) {
screen_init();
while (doloop) {
current_getch = getch();
if (current_getch == 113) {
doloop = 0;
}
maketime();
update_display();
sleep(1);
}
screen_end();
printf("TEST ENDS\n");
return 0;
}
Makefile
all:: ncurses
ncurses: ncurses.c
gcc -o $@ $? -lncurses
clean::
rm -f ncurses
.PHONY: clean
Last-Modified: Sat, 04 Feb 2006 16:03:18 GMT
|
|
