Ncurses键盘输入 [英] Ncurses Keyboard input

问题描述

嘿，我已经测试过getch和getchar，但是它想输入一些东西，我认为读取键盘缓冲区的功能一定很不错. 我的代码的一部分

hey i have tested getch and getchar buts its wating for input , i think there must be an funktion who read the keyboard buffer. Part of my code

while (1) {
    if (key!='r')
    {
        if (key!='q')
        { 
            mvprintw(LINES-2, 1, "Display will refresh in %2d seconds ", t);
            refresh();  
            sleep(1);
            t--;
            break;
        }
        else
        {
        exit (0);
        }
    }
    else
    {
    return;
    }

}

推荐答案

如果您不希望getch()等待，则必须使用nodelay()将其设置为非阻塞.

If you don't want getch() to wait, you have to set it up to be non-blocking, with nodelay().

执行后:

if (nodelay (pWin, 1) == ERR) {
    // some error occurred.
}

然后，如果没有可用的输入，getch()将返回ERR.

then getch() will return ERR if no input is available.

输入选项的联机帮助页为此处，而getch的行为为在此处以及在其自己的联机帮助页中都提到过，请在此处链接.

The manpage for the input options is here and the behaviour of getch is mentioned both there and in its own manpage as well, link here.

nodelay选项使getch成为非阻塞调用.如果没有任何输入准备就绪，getch将返回ERR.如果被禁用(bf为FALSE)，getch将等待直到按下某个键.

The nodelay option causes getch to be a non-blocking call. If no input is ready, getch returns ERR. If disabled (bf is FALSE), getch waits until a key is pressed.

---

在无延迟模式下，如果没有输入在等待，则返回值ERR.

In no-delay mode, if no input is waiting, the value ERR is returned.

这篇关于Ncurses键盘输入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！