gm-tui 0.0.1

TUI-based Ethereum wallet
Documentation 
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use crossterm::event::{KeyCode, KeyEventKind};

use crate::tui::Event;

#[derive(Clone, Debug, Default)]
pub struct Cursor {
    pub current: usize,
}

impl Cursor {
    pub fn reset(&mut self) {
        self.current = 0;
    }

    pub fn handle(&mut self, event: &Event, cursor_max: usize) {
        if let Event::Input(key_event) = event {
            if key_event.kind == KeyEventKind::Press {
                match key_event.code {
                    KeyCode::Up => {
                        self.move_up(cursor_max);
                    }
                    KeyCode::Down => {
                        self.move_down(cursor_max);
                    }
                    _ => {}
                }
            }
        }
    }

    fn move_up(&mut self, max: usize) {
        if max != 0 {
            self.current = (self.current + max - 1) % max;
        }
    }

    fn move_down(&mut self, max: usize) {
        if max != 0 {
            self.current = (self.current + 1) % max;
        }
    }
}