Current File : //usr/share/doc/ncurses-devel-5.9/test/redraw.c
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/*
* $Id: redraw.c,v 1.8 2012/12/08 20:46:02 tom Exp $
*
* Demonstrate the redrawwin() and wredrawln() functions.
* Thomas Dickey - 2006/11/4
*/
#include <test.priv.h>
static void
trash(int beg_x, int max_x, int cur_x)
{
int x;
for (x = cur_x; x > beg_x; --x) {
putchar('\b');
}
for (x = beg_x; x < max_x; ++x) {
if (x < cur_x)
putchar('<');
else if (x == cur_x)
putchar('=');
else if (x > cur_x)
putchar('>');
}
for (x = max_x; x > cur_x; --x) {
putchar('\b');
}
}
static void
test_redraw(WINDOW *win)
{
WINDOW *win1;
WINDOW *win2;
bool done = FALSE;
int ch, y, x;
int max_y, max_x;
int beg_y, beg_x;
assert(win != 0);
scrollok(win, TRUE);
keypad(win, TRUE);
getmaxyx(win, max_y, max_x);
getbegyx(win, beg_y, beg_x);
while (!done) {
ch = wgetch(win);
getyx(win, y, x);
switch (ch) {
case 'q':
/* FALLTHRU */
case ESCAPE:
done = TRUE;
break;
case 'w':
win1 = newwin(max_y, max_x,
beg_y, beg_x);
win2 = newwin(max_y - 2, max_x - 2,
beg_y + 1, beg_x + 1);
box(win1, 0, 0);
wrefresh(win1);
test_redraw(win2);
delwin(win2);
delwin(win1);
touchwin(win);
break;
case '!':
/*
* redrawwin() and wredrawln() do not take into account the
* possibility that the cursor may have moved. That makes them
* cumbersome for using with a shell command. So we simply
* trash the current line of the window using backspace/overwrite.
*/
trash(beg_x, max_x, x + beg_x);
break;
#ifdef NCURSES_VERSION
case '@':
/*
* For a shell command, we can work around the problem noted above
* using mvcur(). It is ifdef'd for NCURSES, since X/Open does
* not define the case where the old location is unknown.
*/
IGNORE_RC(system("date"));
mvcur(-1, -1, y, x);
break;
#endif
case CTRL('W'):
redrawwin(win);
break;
case CTRL('L'):
wredrawln(win, y, 1);
break;
case KEY_UP:
if (y > 0)
wmove(win, y - 1, x);
break;
case KEY_DOWN:
if (y < max_y)
wmove(win, y + 1, x);
break;
case KEY_LEFT:
if (x > 0)
wmove(win, y, x - 1);
break;
case KEY_RIGHT:
if (x < max_x)
wmove(win, y, x + 1);
break;
default:
if (ch > KEY_MIN) {
waddstr(win, keyname(ch));
} else {
waddstr(win, unctrl(UChar(ch)));
}
break;
}
wnoutrefresh(win);
doupdate();
}
}
int
main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
{
initscr();
raw();
noecho();
test_redraw(stdscr);
endwin();
ExitProgram(EXIT_SUCCESS);
}
Mini Shell