I’ve now put together a simple example program on GitHub: https://github.com/ulfalizer/readline-and-ncurses. It supports seamless and efficient terminal resizing and multibyte/combining/wide characters. The code has helpful comments. Screenshot below:
[UPDATE] For latest Windows 10 please read useful contribution by @brainslugs83, just below in the comments to this answer. While for versions before Windows 10 Anniversary Update: ANSI.SYS has a restriction that it can run only in the context of the MS-DOS sub-system under Windows 95-Vista. Microsoft KB101875 explains how to enable ANSI.SYS in a … Read more
Here’s a working version: #include <curses.h> int main(void) { initscr(); start_color(); init_pair(1, COLOR_BLACK, COLOR_RED); init_pair(2, COLOR_BLACK, COLOR_GREEN); attron(COLOR_PAIR(1)); printw(“This should be printed in black with a red background!\n”); attron(COLOR_PAIR(2)); printw(“And this in a green background!\n”); refresh(); getch(); endwin(); } Notes: you need to call start_color() after initscr() to use color. you have to use the … Read more
The wide character support is handled by ncursesw. Depending on your distro, ncurses may or may not point there (seemingly not in yours). Try using -lncursesw instead of -lncurses. Also, for the locale, try calling setlocale(LC_ALL, “”)
You can define the QT_NO_KEYWORDS macro, that disables the “signals” and “slots” macros. If you use QMake: CONFIG += no_keywords (Qt Documentation here) If you’re using another build system, do whatever it needs to pass -DQT_NO_KEYWORDS to the compiler. Defining QT_NO_KEYWORDS will require you to change occurrences of signals to Q_SIGNALS and slots to Q_SLOTS … Read more
You need to pass -l options at the end of the command line: gcc -static hello_curses.c -o curses -lncurses When the compiler encounters -lfoo, it links in all the symbols from foo that have been requested by a previous file. If you put -lfoo at the beginning, no symbol has been requested yet, so no … Read more
Two problems: first of all, a wchar_t must be printed with %lc format, not %c. The second one is that unless you call setlocale the character set is not set properly, and you probably get ? instead of your star. The following code seems to work though: #include <stdio.h> #include <wchar.h> #include <locale.h> int main() … Read more
The curses library is a package deal. You can’t just pull out one routine and hope for the best without properly initializing the library. Here’s a code that correctly blocks on getch(): #include <curses.h> int main(void) { initscr(); timeout(-1); int c = getch(); endwin(); printf (“%d %c\n”, c, c); return 0; }
I was having this problem with an ncurses program on Centos 6.2. It turns out that ncurses is sometimes split into two libraries, ncurses and tinfo. In my case, stdscr exists in libtinfo, not in libncurses, so adding -ltinfo to the link line, after -lncurses, solved the problem.
Use QSocketNotifier to be notified of things being available on stdin. Call nonblocking getch() in a loop until no more input is available. This is vitally important: the notifier will notify only when new data is available, but this doesn’t mean that it notifies on every character! If you receive multiple characters at a time, … Read more