color.c

来自「Linux程序设计(原书第2版)源码」· C语言 代码 · 共 56 行

/*  First off, we check whether the program's display terminal supports color.
    If it does, we start the color display.  */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <curses.h>

int main() 
{
    int i;

    initscr();
    if (!has_colors()) {
        endwin();
        fprintf(stderr, "Error - no color support on this terminal\n");
        exit(1);
    }

    if (start_color() != OK) {
        endwin();
        fprintf(stderr, "Error - could not initialize colors\n");
        exit(2);
    }

/*  We can now print out the allowed number of colors and color pairs.
    We create seven color pairs and display them one at a time.  */

    clear();
    mvprintw(5, 5, "There are %d COLORS, and %d COLOR_PAIRS available", 
             COLORS, COLOR_PAIRS);
    refresh();

    init_pair(1, COLOR_RED, COLOR_BLACK);
    init_pair(2, COLOR_RED, COLOR_GREEN);
    init_pair(3, COLOR_GREEN, COLOR_RED);
    init_pair(4, COLOR_YELLOW, COLOR_BLUE);
    init_pair(5, COLOR_BLACK, COLOR_WHITE);
    init_pair(6, COLOR_MAGENTA, COLOR_BLUE);
    init_pair(7, COLOR_CYAN, COLOR_WHITE);

    for (i = 1; i <= 7; i++) {
        attroff(A_BOLD);
        attrset(COLOR_PAIR(i));
        mvprintw(5 + i, 5, "Color pair %d", i);
        attrset(COLOR_PAIR(i) | A_BOLD);
        mvprintw(5 + i, 25, "Bold color pair %d", i);
        refresh();
        sleep(1);
    }

    endwin();
    exit(EXIT_SUCCESS);
}