Chapter 19: Terminal UI (ncurses)

ncurses provides terminal control for creating TUIs (Text User Interfaces).

19.1 Initialization

from "modules/ncurses/ncurses.nano" import initscr, endwin, getch

fn run_tui() -> int {
    (initscr)
    let ch: int = (getch)
    (endwin)
    return ch
}

shadow run_tui {
    assert true
}

19.2 Text Output

from "modules/ncurses/ncurses.nano" import printw, move, refresh

fn display_text() -> void {
    (move 5 10)
    (printw "Hello, Terminal!")
    (refresh)
}

shadow display_text {
    assert true
}

19.3 Colors

from "modules/ncurses/ncurses.nano" import start_color, init_pair, attron, attroff

fn colored_text() -> void {
    (start_color)
    (init_pair 1 "red" "black")
    (attron 1)
    (printw "Red text")
    (attroff 1)
}

shadow colored_text {
    assert true
}

19.4 Windows

from "modules/ncurses/ncurses.nano" import newwin, wrefresh, delwin

fn create_subwindow() -> void {
    let win: Window = (newwin 10 40 5 5)
    (wrefresh win)
    (delwin win)
}

shadow create_subwindow {
    assert true
}

Summary

ncurses provides:

• ✅ Terminal control
• ✅ Colored text
• ✅ Windows and panels
• ✅ Keyboard input

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**Next:** Chapter 20: Testing & Quality