rust-chessground

A chessboard widget for Relm/GTK. Inspired by chessground.js.

Features

• Uses vocabulary from Shakmaty but is chess rule agnostic
• Can show legal move hints
• Check hints
• Move pieces by click
• Move pieces by drag and drop
  • Minimum distance
  • Piece ghosts
• Draw circles and arrows on the board
• Integrated promotion dialog
• Smooth animations

Only a minimum of the features is exposed in the public API. Feel free to request more.

Documentation

Read the documentation

Example

A board that lets the user freely move pieces. Run with cargo run --example editor.

#![feature(proc_macro)]

extern crate gtk;
extern crate chessground;
#[macro_use]
extern crate relm;
extern crate relm_attributes;
#[macro_use]
extern crate relm_derive;
extern crate shakmaty;

use gtk::prelude::*;
use relm::Widget;
use relm_attributes::widget;

use shakmaty::{Square, Board};
use chessground::{Ground, UserMove, SetBoard};

use self::Msg::*;

#[derive(Msg)]
pub enum Msg {
    Quit,
    PieceMoved(Square, Square),
}

#[widget]
impl Widget for Win {
    fn model() -> Board {
        Board::default()
    }

    fn update(&mut self, event: Msg) {
        match event {
            Quit => gtk::main_quit(),
            PieceMoved(orig, dest) => {
                if let Some(piece) = self.model.remove_piece_at(orig) {
                    self.model.set_piece_at(dest, piece, false);
                    self.ground.emit(SetBoard(self.model.clone()));
                }
            }
        }
    }

    view! {
        gtk::Window {
            title: "Chessground",
            #[name="ground"]
            Ground {
                UserMove(orig, dest, _) => PieceMoved(orig, dest),
            },
            delete_event(_, _) => (Quit, Inhibit(false)),
        }
    }
}

fn main() {
    Win::run(()).expect("initialized gtk");
}

Piece sets

License

Chessground is licensed under the GPL-3.0 (or any later version at your option). See the COPYING file for the full license.