ref: f2db1dce36ddf18274be9aa03f0fd1e1921755a1
dir: /tui_main.c/
#include "base.h"
#include "field.h"
#include <locale.h>
#include <ncurses.h>
#include <unistd.h>
int main() {
// Enable UTF-8 by explicitly initializing our locale before initializing
// ncurses.
setlocale(LC_ALL, "");
// Initialize ncurses
initscr();
// Allow ncurses to control newline translation. Fine to use with any modern
// terminal, and will let ncurses run faster.
nonl();
// Set interrupt keys (interrupt, break, quit...) to not flush. Helps keep
// ncurses state consistent, at the cost of less responsive terminal
// interrupt. (This will rarely happen.)
intrflush(stdscr, FALSE);
// Receive keyboard input immediately, and receive shift, control, etc. as
// separate events, instead of combined with individual characters.
raw();
// Don't echo keyboard input
noecho();
// Also receive arrow keys, etc.
keypad(stdscr, TRUE);
// Hide the terminal cursor
curs_set(0);
// Don't block on calls like getch() -- have it ERR immediately if the user
// hasn't typed anything. That way we can mix other timers in our code,
// instead of being a slave only to terminal input.
// nodelay(stdscr, TRUE);
Field field;
field_init_fill(&field, 16, 16, '.');
printw("Type any character to fill it in an alternating grid, or\ntype '");
attron(A_BOLD);
printw("q");
attroff(A_BOLD);
printw("' to quit\n");
refresh();
char fill_char = '?';
for (;;) {
int ch = getch();
clear();
if (ch == 'q')
break;
// ncurses gives us ERR if there was no user input. We'll sleep for 0
// seconds, so that we'll yield CPU time to the OS instead of looping as
// fast as possible. This avoids battery drain/excessive CPU usage. There
// are better ways to do this that waste less CPU, but they require doing a
// little more work on each individual platform (Linux, Mac, etc.)
if (ch == ERR) {
sleep(0);
continue;
}
// ncurses gives us the special value KEY_RESIZE if the user didn't
// actually type anything, but the terminal resized. If that happens to us,
// just re-use the fill character from last time.
char new_fill_char;
if (ch < CHAR_MIN || ch > CHAR_MAX || ch == KEY_RESIZE)
new_fill_char = '?';
else
new_fill_char = (char)ch;
int term_height = getmaxy(stdscr);
int term_width = getmaxx(stdscr);
assert(term_height >= 0 && term_width >= 0);
if (new_fill_char != fill_char) {
fill_char = new_fill_char;
}
field_fill_subrect(&field, 0, 0, field.height, field.width, '.');
field_fill_subrect(&field, 1, 1, (Usz)(field.height - 2),
(Usz)(field.width - 2), fill_char);
// field_debug_draw(stdscr, &field, 0, 0);
// field_copy_subrect(&field, &field, 0, 0, 4, 4, 8, 8);
// field_copy_subrect(&field, &field, 0, 0, 0, 0, 0, 0);
// field_debug_draw(stdscr, &field, field.height + 1, 0);
// field_copy_subrect(&field, &field, 6, 6, 9, 9, 30, 30);
// field_debug_draw(stdscr, &field, 0, field.width + 1);
// field_debug_draw(stdscr, &field, field.height, field.width);
refresh();
}
field_deinit(&field);
endwin();
return 0;
}