rust_minifb/examples/menu.rs

use minifb::MENU_KEY_CTRL;
use minifb::{InputCallback, Key, Menu, Scale, Window, WindowOptions};

const WIDTH: usize = 640;
const HEIGHT: usize = 360;

const MENU_TEST_ID: usize = 1;
const OTHER_MENU_ID: usize = 2;
const COLOR_0_ID: usize = 3;
const COLOR_1_ID: usize = 4;
const COLOR_2_ID: usize = 5;
const CLOSE_MENU_ID: usize = 6;

struct KeyCharCallback;

impl InputCallback for KeyCharCallback {
    fn add_char(&mut self, c: u32) {
        println!("add_char {}", c);
    }
}

fn main() {
    let mut buffer: Vec<u32> = vec![0; WIDTH * HEIGHT];

    let mut window = Window::new(
        "Menu Test - Press ESC to exit",
        WIDTH,
        HEIGHT,
        WindowOptions {
            resize: true,
            scale: Scale::X2,
            ..WindowOptions::default()
        },
    )
    .expect("Unable to Open Window");

    window.set_input_callback(Box::new(KeyCharCallback {}));

    let mut menu = Menu::new("Test").unwrap();
    let mut sub = Menu::new("Select Color").unwrap();

    sub.add_item("Color 0", COLOR_0_ID)
        .shortcut(Key::F1, 0)
        .build();
    sub.add_item("Color 1", COLOR_1_ID)
        .shortcut(Key::F2, 0)
        .build();
    sub.add_item("Color 2", COLOR_2_ID)
        .shortcut(Key::F7, 0)
        .build();

    menu.add_item("Menu Test", MENU_TEST_ID)
        .shortcut(Key::W, MENU_KEY_CTRL)
        .build();

    menu.add_separator();

    menu.add_item("Other Menu", OTHER_MENU_ID)
        .shortcut(Key::W, MENU_KEY_CTRL)
        .build();
    menu.add_item("Remove Menu", CLOSE_MENU_ID)
        .shortcut(Key::R, 0)
        .build();

    menu.add_sub_menu("Sub Test", &sub);

    let menu_handle = window.add_menu(&menu);

    window.get_posix_menus().map(|menus| {
        println!("Menus {:?}", menus);
    });

    let mut color_mul = 1;

    while window.is_open() && !window.is_key_down(Key::Escape) {
        for y in 0..HEIGHT {
            for x in 0..WIDTH {
                buffer[(y * WIDTH) + x] = (((x ^ y) & 0xff) * color_mul) as u32;
            }
        }

        window.is_menu_pressed().map(|menu_id| {
            match menu_id {
                COLOR_0_ID => {
                    color_mul = 0xfe0000;
                }
                COLOR_1_ID => {
                    color_mul = 0xff00;
                }
                COLOR_2_ID => {
                    color_mul = 1;
                }
                CLOSE_MENU_ID => {
                    println!("remove menu");
                    window.remove_menu(menu_handle);
                }
                _ => (),
            }

            println!("Menu id {} pressed", menu_id);
        });

        window.get_keys().iter().for_each(|key| match key {
            Key::W => println!("holding w!"),
            Key::T => println!("holding t!"),
            _ => (),
        });

        // We unwrap here as we want this code to exit if it fails
        window.update_with_buffer(&buffer, WIDTH, HEIGHT).unwrap();
    }
}