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serenity/Userland/Games/Chess/ChessWidget.cpp
Tim Ledbetter 5a25082be5 Chess: Don't ask the engine to make a move if the game is finished 
Previously, the engine would attempt to make a move if the engine was
changed after the game had ended.

This change also allows the player to always flip the board when the
game is finished, instead of only being able to flip the board on
their turn.
2023-05-23 11:43:22 +02:00

769 lines
28 KiB
C++
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/*
* Copyright (c) 2020-2022, the SerenityOS developers.
* Copyright (c) 2023, Tim Ledbetter <timledbetter@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "ChessWidget.h"
#include "PromotionDialog.h"
#include <AK/DeprecatedString.h>
#include <AK/Random.h>
#include <AK/String.h>
#include <LibCore/DateTime.h>
#include <LibCore/File.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGfx/AntiAliasingPainter.h>
#include <LibGfx/Font/Font.h>
#include <LibGfx/Font/FontDatabase.h>
#include <LibGfx/Path.h>
#include <unistd.h>
ErrorOr<NonnullRefPtr<ChessWidget>> ChessWidget::try_create()
{
auto widget = TRY(AK::adopt_nonnull_ref_or_enomem(new (nothrow) ChessWidget));
widget->set_piece_set("stelar7"sv);
return widget;
}
void ChessWidget::paint_event(GUI::PaintEvent& event)
{
int const min_size = min(width(), height());
int const widget_offset_x = (window()->width() - min_size) / 2;
int const widget_offset_y = (window()->height() - min_size) / 2;
GUI::Frame::paint_event(event);
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.fill_rect(frame_inner_rect(), Color::Black);
painter.translate(frame_thickness() + widget_offset_x, frame_thickness() + widget_offset_y);
auto square_width = min_size / 8;
auto square_height = min_size / 8;
auto square_margin = square_width / 10;
int coord_rank_file = (side() == Chess::Color::White) ? 0 : 7;
Chess::Board& active_board = (m_playback ? board_playback() : board());
auto& coordinate_font = Gfx::FontDatabase::default_font().bold_variant();
Chess::Square::for_each([&](Chess::Square sq) {
Gfx::IntRect tile_rect;
if (side() == Chess::Color::White) {
tile_rect = { sq.file * square_width, (7 - sq.rank) * square_height, square_width, square_height };
} else {
tile_rect = { (7 - sq.file) * square_width, sq.rank * square_height, square_width, square_height };
}
painter.fill_rect(tile_rect, (sq.is_light()) ? board_theme().light_square_color : board_theme().dark_square_color);
if (active_board.last_move().has_value()) {
auto const last_move = active_board.last_move().value();
if (last_move.to == sq || last_move.from == sq)
painter.fill_rect(tile_rect, m_move_highlight_color);
auto const piece = active_board.get_piece(sq);
if (m_highlight_checks && last_move.is_check && piece.type == Chess::Type::King && piece.color == active_board.turn()) {
Array<Gfx::ColorStop, 2> colors = {
Gfx::ColorStop { .color = Color::Red, .position = 0.16f },
Gfx::ColorStop { .color = Color::Transparent, .position = .66f }
};
painter.fill_rect_with_radial_gradient(tile_rect, colors, tile_rect.center() - tile_rect.top_left(), tile_rect.size());
}
}
if (m_coordinates) {
auto text_color = (sq.is_light()) ? board_theme().dark_square_color : board_theme().light_square_color;
auto shrunken_rect = tile_rect;
shrunken_rect.shrink(4, 4);
if (sq.rank == coord_rank_file) {
auto file_char = sq.file_char();
painter.draw_text(shrunken_rect, { &file_char, 1 }, coordinate_font, Gfx::TextAlignment::BottomRight, text_color);
}
if (sq.file == coord_rank_file) {
auto rank_char = sq.rank_char();
painter.draw_text(shrunken_rect, { &rank_char, 1 }, coordinate_font, Gfx::TextAlignment::TopLeft, text_color);
}
}
for (auto& m : m_board_markings) {
if (m.type() == BoardMarking::Type::Square && m.from == sq) {
Gfx::Color color = m.secondary_color ? m_marking_secondary_color : (m.alternate_color ? m_marking_alternate_color : m_marking_primary_color);
painter.fill_rect(tile_rect, color);
}
}
if (!(m_dragging_piece && sq == m_moving_square)) {
auto bmp = m_pieces.get(active_board.get_piece(sq));
if (bmp.has_value()) {
painter.draw_scaled_bitmap(tile_rect.shrunken(square_margin, square_margin, square_margin, square_margin), *bmp.value(), bmp.value()->rect(), 1.0f, Gfx::Painter::ScalingMode::BilinearBlend);
}
}
return IterationDecision::Continue;
});
auto draw_arrow = [&painter](Gfx::FloatPoint A, Gfx::FloatPoint B, float w1, float w2, float h, Gfx::Color color) {
float dx = B.x() - A.x();
float dy = A.y() - B.y();
float phi = atan2f(dy, dx);
float hdx = h * cosf(phi);
float hdy = h * sinf(phi);
const auto cos_pi_2_phi = cosf(float { M_PI_2 } - phi);
const auto sin_pi_2_phi = sinf(float { M_PI_2 } - phi);
Gfx::FloatPoint A1(A.x() - (w1 / 2) * cos_pi_2_phi, A.y() - (w1 / 2) * sin_pi_2_phi);
Gfx::FloatPoint B3(A.x() + (w1 / 2) * cos_pi_2_phi, A.y() + (w1 / 2) * sin_pi_2_phi);
Gfx::FloatPoint A2(A1.x() + (dx - hdx), A1.y() - (dy - hdy));
Gfx::FloatPoint B2(B3.x() + (dx - hdx), B3.y() - (dy - hdy));
Gfx::FloatPoint A3(A2.x() - w2 * cos_pi_2_phi, A2.y() - w2 * sin_pi_2_phi);
Gfx::FloatPoint B1(B2.x() + w2 * cos_pi_2_phi, B2.y() + w2 * sin_pi_2_phi);
auto path = Gfx::Path();
path.move_to(A);
path.line_to(A1);
path.line_to(A2);
path.line_to(A3);
path.line_to(B);
path.line_to(B1);
path.line_to(B2);
path.line_to(B3);
path.line_to(A);
path.close();
painter.fill_path(path, color, Gfx::Painter::WindingRule::EvenOdd);
};
for (auto& m : m_board_markings) {
if (m.type() == BoardMarking::Type::Arrow) {
Gfx::FloatPoint arrow_start;
Gfx::FloatPoint arrow_end;
if (side() == Chess::Color::White) {
arrow_start = { m.from.file * square_width + square_width / 2.0f, (7 - m.from.rank) * square_height + square_height / 2.0f };
arrow_end = { m.to.file * square_width + square_width / 2.0f, (7 - m.to.rank) * square_height + square_height / 2.0f };
} else {
arrow_start = { (7 - m.from.file) * square_width + square_width / 2.0f, m.from.rank * square_height + square_height / 2.0f };
arrow_end = { (7 - m.to.file) * square_width + square_width / 2.0f, m.to.rank * square_height + square_height / 2.0f };
}
Gfx::Color color = m.secondary_color ? m_marking_secondary_color : (m.alternate_color ? m_marking_primary_color : m_marking_alternate_color);
draw_arrow(arrow_start, arrow_end, square_width / 8.0f, square_width / 10.0f, square_height / 2.5f, color);
}
}
if (m_dragging_piece) {
if (m_show_available_moves) {
Gfx::IntPoint move_point;
Gfx::IntPoint point_offset = { square_width / 3, square_height / 3 };
Gfx::IntSize rect_size = { square_width / 3, square_height / 3 };
for (auto const& square : m_available_moves) {
if (side() == Chess::Color::White) {
move_point = { square.file * square_width, (7 - square.rank) * square_height };
} else {
move_point = { (7 - square.file) * square_width, square.rank * square_height };
}
Gfx::AntiAliasingPainter aa_painter { painter };
aa_painter.fill_ellipse({ move_point + point_offset, rect_size }, Gfx::Color::LightGray);
}
}
Gfx::IntRect origin_square;
if (side() == Chess::Color::White) {
origin_square = { m_moving_square.file * square_width, (7 - m_moving_square.rank) * square_height, square_width, square_height };
} else {
origin_square = { (7 - m_moving_square.file) * square_width, m_moving_square.rank * square_height, square_width, square_height };
}
painter.fill_rect(origin_square, m_move_highlight_color);
auto bmp = m_pieces.get(active_board.get_piece(m_moving_square));
if (bmp.has_value()) {
auto center = m_drag_point - Gfx::IntPoint(square_width / 2, square_height / 2);
painter.draw_scaled_bitmap({ center, { square_width, square_height } }, *bmp.value(), bmp.value()->rect(), 1.0f, Gfx::Painter::ScalingMode::BilinearBlend);
}
}
}
void ChessWidget::mousedown_event(GUI::MouseEvent& event)
{
int const min_size = min(width(), height());
int const widget_offset_x = (window()->width() - min_size) / 2;
int const widget_offset_y = (window()->height() - min_size) / 2;
if (!frame_inner_rect().contains(event.position()))
return;
auto square = mouse_to_square(event);
if (event.button() == GUI::MouseButton::Secondary) {
if (m_dragging_piece) {
m_dragging_piece = false;
set_override_cursor(Gfx::StandardCursor::None);
m_available_moves.clear();
} else if (square.has_value()) {
m_current_marking.from = square.release_value();
}
return;
}
m_board_markings.clear();
if (!square.has_value())
return;
auto piece = board().get_piece(square.value());
if (drag_enabled() && piece.color == board().turn() && !m_playback) {
m_dragging_piece = true;
set_override_cursor(Gfx::StandardCursor::Drag);
m_drag_point = { event.position().x() - widget_offset_x, event.position().y() - widget_offset_y };
m_moving_square = square.value();
m_board.generate_moves([&](Chess::Move move) {
if (move.from == m_moving_square) {
m_available_moves.append(move.to);
}
return IterationDecision::Continue;
});
}
update();
}
void ChessWidget::mouseup_event(GUI::MouseEvent& event)
{
if (!frame_inner_rect().contains(event.position()))
return;
auto target_square = mouse_to_square(event);
if (event.button() == GUI::MouseButton::Secondary) {
if (!target_square.has_value())
return;
m_current_marking.secondary_color = event.shift();
m_current_marking.alternate_color = event.ctrl();
m_current_marking.to = target_square.release_value();
auto match_index = m_board_markings.find_first_index(m_current_marking);
if (match_index.has_value()) {
m_board_markings.remove(match_index.value());
update();
return;
}
m_board_markings.append(m_current_marking);
update();
return;
}
if (!m_dragging_piece)
return;
m_dragging_piece = false;
set_override_cursor(Gfx::StandardCursor::Hand);
m_available_moves.clear();
if (!target_square.has_value()) {
update();
return;
}
Chess::Move move = { m_moving_square, target_square.release_value() };
if (board().is_promotion_move(move)) {
auto promotion_dialog = PromotionDialog::construct(*this);
if (promotion_dialog->exec() == PromotionDialog::ExecResult::OK)
move.promote_to = promotion_dialog->selected_piece();
}
if (board().apply_move(move)) {
m_playback_move_number = board().moves().size();
m_playback = false;
m_board_playback = m_board;
// If two humans are playing, ask whether they wish to accept a draw.
auto claim_draw_behavior = m_engine.is_null() ? ClaimDrawBehavior::Prompt : ClaimDrawBehavior::Always;
if (!check_game_over(claim_draw_behavior))
input_engine_move();
}
update();
}
void ChessWidget::mousemove_event(GUI::MouseEvent& event)
{
int const min_size = min(width(), height());
int const widget_offset_x = (window()->width() - min_size) / 2;
int const widget_offset_y = (window()->height() - min_size) / 2;
if (!frame_inner_rect().contains(event.position()))
return;
if (m_engine && board().turn() != side())
return;
if (!m_dragging_piece) {
auto square = mouse_to_square(event);
if (!square.has_value()) {
set_override_cursor(Gfx::StandardCursor::None);
return;
}
auto piece = board().get_piece(square.release_value());
if (piece.color == board().turn())
set_override_cursor(Gfx::StandardCursor::Hand);
else
set_override_cursor(Gfx::StandardCursor::None);
return;
}
m_drag_point = { event.position().x() - widget_offset_x, event.position().y() - widget_offset_y };
update();
}
void ChessWidget::keydown_event(GUI::KeyEvent& event)
{
set_override_cursor(Gfx::StandardCursor::None);
switch (event.key()) {
case KeyCode::Key_Left:
playback_move(PlaybackDirection::Backward);
break;
case KeyCode::Key_Right:
playback_move(PlaybackDirection::Forward);
break;
case KeyCode::Key_Up:
playback_move(PlaybackDirection::Last);
break;
case KeyCode::Key_Down:
playback_move(PlaybackDirection::First);
break;
case KeyCode::Key_Home:
playback_move(PlaybackDirection::First);
break;
case KeyCode::Key_End:
playback_move(PlaybackDirection::Last);
break;
default:
event.ignore();
return;
}
update();
}
static constexpr StringView set_path = "/res/graphics/chess/sets/"sv;
static RefPtr<Gfx::Bitmap> get_piece(StringView set, StringView image)
{
StringBuilder builder;
builder.append(set_path);
builder.append(set);
builder.append('/');
builder.append(image);
return Gfx::Bitmap::load_from_file(builder.to_deprecated_string()).release_value_but_fixme_should_propagate_errors();
}
void ChessWidget::set_piece_set(StringView set)
{
m_piece_set = set;
m_pieces.set({ Chess::Color::White, Chess::Type::Pawn }, get_piece(set, "white-pawn.png"sv));
m_pieces.set({ Chess::Color::Black, Chess::Type::Pawn }, get_piece(set, "black-pawn.png"sv));
m_pieces.set({ Chess::Color::White, Chess::Type::Knight }, get_piece(set, "white-knight.png"sv));
m_pieces.set({ Chess::Color::Black, Chess::Type::Knight }, get_piece(set, "black-knight.png"sv));
m_pieces.set({ Chess::Color::White, Chess::Type::Bishop }, get_piece(set, "white-bishop.png"sv));
m_pieces.set({ Chess::Color::Black, Chess::Type::Bishop }, get_piece(set, "black-bishop.png"sv));
m_pieces.set({ Chess::Color::White, Chess::Type::Rook }, get_piece(set, "white-rook.png"sv));
m_pieces.set({ Chess::Color::Black, Chess::Type::Rook }, get_piece(set, "black-rook.png"sv));
m_pieces.set({ Chess::Color::White, Chess::Type::Queen }, get_piece(set, "white-queen.png"sv));
m_pieces.set({ Chess::Color::Black, Chess::Type::Queen }, get_piece(set, "black-queen.png"sv));
m_pieces.set({ Chess::Color::White, Chess::Type::King }, get_piece(set, "white-king.png"sv));
m_pieces.set({ Chess::Color::Black, Chess::Type::King }, get_piece(set, "black-king.png"sv));
}
Optional<Chess::Square> ChessWidget::mouse_to_square(GUI::MouseEvent& event) const
{
int const min_size = min(width(), height());
int const widget_offset_x = (window()->width() - min_size) / 2;
int const widget_offset_y = (window()->height() - min_size) / 2;
auto x = event.x() - widget_offset_x;
auto y = event.y() - widget_offset_y;
if (x < 0 || y < 0 || x > min_size || y > min_size)
return {};
int square_width = min_size / 8;
int square_height = min_size / 8;
auto rank = y / square_height;
auto file = x / square_width;
if (rank < 0 || file < 0 || rank > 7 || file > 7)
return {};
if (side() == Chess::Color::White)
return Chess::Square { 7 - rank, file };
return Chess::Square { rank, 7 - file };
}
RefPtr<Gfx::Bitmap const> ChessWidget::get_piece_graphic(Chess::Piece const& piece) const
{
return m_pieces.get(piece).value();
}
void ChessWidget::reset()
{
m_board_markings.clear();
m_playback = false;
m_playback_move_number = 0;
m_board_playback = Chess::Board();
m_board = Chess::Board();
m_side = (get_random<u32>() % 2) ? Chess::Color::White : Chess::Color::Black;
m_drag_enabled = true;
if (m_engine)
m_engine->start_new_game();
input_engine_move();
update();
}
void ChessWidget::set_board_theme(StringView name)
{
// FIXME: Add some kind of themes.json
// The following Colors have been taken from lichess.org, but i'm pretty sure they took them from chess.com.
if (name == "Beige") {
m_board_theme = { "Beige"sv, Color::from_rgb(0xb58863), Color::from_rgb(0xf0d9b5) };
} else if (name == "Green") {
m_board_theme = { "Green"sv, Color::from_rgb(0x86a666), Color::from_rgb(0xffffdd) };
} else if (name == "Blue") {
m_board_theme = { "Blue"sv, Color::from_rgb(0x8ca2ad), Color::from_rgb(0xdee3e6) };
} else {
set_board_theme("Beige"sv);
}
}
bool ChessWidget::want_engine_move()
{
if (!m_engine)
return false;
if (board().turn() == side() || board().game_finished())
return false;
return true;
}
void ChessWidget::input_engine_move()
{
if (!want_engine_move())
return;
bool drag_was_enabled = drag_enabled();
if (drag_was_enabled)
set_drag_enabled(false);
set_override_cursor(Gfx::StandardCursor::Wait);
m_engine->get_best_move(board(), 4000, [this, drag_was_enabled](ErrorOr<Chess::Move> move) {
set_override_cursor(Gfx::StandardCursor::None);
if (!want_engine_move())
return;
set_drag_enabled(drag_was_enabled);
if (!move.is_error()) {
VERIFY(board().apply_move(move.release_value()));
if (check_game_over(ClaimDrawBehavior::Prompt))
return;
}
m_playback_move_number = m_board.moves().size();
m_playback = false;
m_board_markings.clear();
update();
});
}
void ChessWidget::playback_move(PlaybackDirection direction)
{
if (m_board.moves().is_empty())
return;
m_playback = true;
m_board_markings.clear();
switch (direction) {
case PlaybackDirection::Backward:
if (m_playback_move_number == 0)
return;
m_board_playback = Chess::Board();
for (size_t i = 0; i < m_playback_move_number - 1; i++)
m_board_playback.apply_move(m_board.moves().at(i));
m_playback_move_number--;
break;
case PlaybackDirection::Forward:
if (m_playback_move_number + 1 > m_board.moves().size()) {
m_playback = false;
return;
}
m_board_playback.apply_move(m_board.moves().at(m_playback_move_number++));
if (m_playback_move_number == m_board.moves().size())
m_playback = false;
break;
case PlaybackDirection::First:
m_board_playback = Chess::Board();
m_playback_move_number = 0;
break;
case PlaybackDirection::Last:
while (m_playback) {
playback_move(PlaybackDirection::Forward);
}
break;
default:
VERIFY_NOT_REACHED();
}
update();
}
DeprecatedString ChessWidget::get_fen() const
{
return (m_playback ? m_board_playback.to_fen() : m_board.to_fen()).release_value_but_fixme_should_propagate_errors().to_deprecated_string();
}
ErrorOr<void> ChessWidget::import_pgn(Core::File& file)
{
m_board = Chess::Board();
ByteBuffer bytes = TRY(file.read_until_eof());
StringView content = bytes;
auto lines = content.lines();
StringView line;
size_t i = 0;
// Tag Pair Section
// FIXME: Parse these tags when they become relevant
do {
line = lines.at(i++);
} while (!line.is_empty() || i >= lines.size());
// Movetext Section
bool skip = false;
bool recursive_annotation = false;
bool future_expansion = false;
Chess::Color turn = Chess::Color::White;
DeprecatedString movetext;
for (size_t j = i; j < lines.size(); j++)
movetext = DeprecatedString::formatted("{}{}", movetext, lines.at(i).to_deprecated_string());
for (auto token : movetext.split(' ')) {
token = token.trim_whitespace();
// FIXME: Parse all of these tokens when we start caring about them
if (token.ends_with('}')) {
skip = false;
continue;
}
if (skip)
continue;
if (token.starts_with('{')) {
if (token.ends_with('}'))
continue;
skip = true;
continue;
}
if (token.ends_with(')')) {
recursive_annotation = false;
continue;
}
if (recursive_annotation)
continue;
if (token.starts_with('(')) {
if (token.ends_with(')'))
continue;
recursive_annotation = true;
continue;
}
if (token.ends_with('>')) {
future_expansion = false;
continue;
}
if (future_expansion)
continue;
if (token.starts_with('<')) {
if (token.ends_with('>'))
continue;
future_expansion = true;
continue;
}
if (token.starts_with('$'))
continue;
if (token.contains('*'))
break;
// FIXME: When we become able to set more of the game state, fix these end results
if (token.contains("1-0"sv)) {
m_board.set_resigned(Chess::Color::Black);
break;
}
if (token.contains("0-1"sv)) {
m_board.set_resigned(Chess::Color::White);
break;
}
if (token.contains("1/2-1/2"sv)) {
break;
}
if (!token.ends_with('.')) {
m_board.apply_move(Chess::Move::from_algebraic(token, turn, m_board));
turn = Chess::opposing_color(turn);
}
}
m_board_markings.clear();
m_board_playback = m_board;
m_playback_move_number = m_board_playback.moves().size();
m_playback = true;
update();
return {};
}
ErrorOr<void> ChessWidget::export_pgn(Core::File& file) const
{
// Tag Pair Section
TRY(file.write_until_depleted("[Event \"Casual Game\"]\n"sv.bytes()));
TRY(file.write_until_depleted("[Site \"SerenityOS Chess\"]\n"sv.bytes()));
TRY(file.write_until_depleted(DeprecatedString::formatted("[Date \"{}\"]\n", Core::DateTime::now().to_deprecated_string("%Y.%m.%d"sv)).bytes()));
TRY(file.write_until_depleted("[Round \"1\"]\n"sv.bytes()));
DeprecatedString username(getlogin());
auto const player1 = (!username.is_empty() ? username.view() : "?"sv.bytes());
auto const player2 = (!m_engine.is_null() ? "SerenityOS ChessEngine"sv.bytes() : "?"sv.bytes());
TRY(file.write_until_depleted(DeprecatedString::formatted("[White \"{}\"]\n", m_side == Chess::Color::White ? player1 : player2).bytes()));
TRY(file.write_until_depleted(DeprecatedString::formatted("[Black \"{}\"]\n", m_side == Chess::Color::Black ? player1 : player2).bytes()));
TRY(file.write_until_depleted(DeprecatedString::formatted("[Result \"{}\"]\n", Chess::Board::result_to_points_string(m_board.game_result(), m_board.turn())).bytes()));
TRY(file.write_until_depleted("[WhiteElo \"?\"]\n"sv.bytes()));
TRY(file.write_until_depleted("[BlackElo \"?\"]\n"sv.bytes()));
TRY(file.write_until_depleted("[Variant \"Standard\"]\n"sv.bytes()));
TRY(file.write_until_depleted("[TimeControl \"-\"]\n"sv.bytes()));
TRY(file.write_until_depleted("[Annotator \"SerenityOS Chess\"]\n"sv.bytes()));
TRY(file.write_until_depleted("\n"sv.bytes()));
// Movetext Section
for (size_t i = 0, move_no = 1; i < m_board.moves().size(); i += 2, move_no++) {
const DeprecatedString white = m_board.moves().at(i).to_algebraic().release_value_but_fixme_should_propagate_errors().to_deprecated_string();
if (i + 1 < m_board.moves().size()) {
const DeprecatedString black = m_board.moves().at(i + 1).to_algebraic().release_value_but_fixme_should_propagate_errors().to_deprecated_string();
TRY(file.write_until_depleted(DeprecatedString::formatted("{}. {} {} ", move_no, white, black).bytes()));
} else {
TRY(file.write_until_depleted(DeprecatedString::formatted("{}. {} ", move_no, white).bytes()));
}
}
TRY(file.write_until_depleted("{ "sv.bytes()));
TRY(file.write_until_depleted(Chess::Board::result_to_string(m_board.game_result(), m_board.turn()).bytes()));
TRY(file.write_until_depleted(" } "sv.bytes()));
TRY(file.write_until_depleted(Chess::Board::result_to_points_string(m_board.game_result(), m_board.turn()).bytes()));
TRY(file.write_until_depleted("\n"sv.bytes()));
return {};
}
void ChessWidget::flip_board()
{
if (want_engine_move()) {
GUI::MessageBox::show(window(), "You can only flip the board on your turn."sv, "Flip Board"sv, GUI::MessageBox::Type::Information);
return;
}
m_side = Chess::opposing_color(m_side);
input_engine_move();
update();
}
int ChessWidget::resign()
{
if (want_engine_move()) {
GUI::MessageBox::show(window(), "You can only resign on your turn."sv, "Resign"sv, GUI::MessageBox::Type::Information);
return -1;
}
auto result = GUI::MessageBox::show(window(), "Are you sure you wish to resign?"sv, "Resign"sv, GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::YesNo);
if (result != GUI::MessageBox::ExecResult::Yes)
return -1;
board().set_resigned(m_board.turn());
set_drag_enabled(false);
update();
auto const msg = Chess::Board::result_to_string(m_board.game_result(), m_board.turn());
GUI::MessageBox::show(window(), msg, "Game Over"sv, GUI::MessageBox::Type::Information);
return 0;
}
bool ChessWidget::check_game_over(ClaimDrawBehavior claim_draw_behavior)
{
if (board().game_result() == Chess::Board::Result::NotFinished)
return false;
auto over = true;
switch (board().game_result()) {
case Chess::Board::Result::FiftyMoveRule:
if (claim_draw_behavior == ClaimDrawBehavior::Prompt) {
update();
auto dialog_result = GUI::MessageBox::show(window(), "50 moves have elapsed without a capture or pawn advance. Claim Draw?"sv, "Claim Draw?"sv,
GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::YesNo);
if (dialog_result != GUI::Dialog::ExecResult::Yes)
over = false;
}
break;
case Chess::Board::Result::ThreeFoldRepetition:
if (claim_draw_behavior == ClaimDrawBehavior::Prompt) {
update();
auto dialog_result = GUI::MessageBox::show(window(), "The same board state has repeated three times. Claim Draw?"sv, "Claim Draw?"sv,
GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::YesNo);
if (dialog_result != GUI::Dialog::ExecResult::Yes)
over = false;
}
break;
default:
break;
}
if (!over)
return false;
set_override_cursor(Gfx::StandardCursor::None);
set_drag_enabled(false);
update();
auto msg = Chess::Board::result_to_string(board().game_result(), board().turn());
GUI::MessageBox::show(window(), msg, "Game Over"sv, GUI::MessageBox::Type::Information);
return true;
}
void ChessWidget::config_string_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, DeprecatedString const& value)
{
if (domain != "Games"sv && group != "Chess"sv)
return;
if (key == "PieceSet"sv) {
set_piece_set(value);
update();
} else if (key == "BoardTheme"sv) {
set_board_theme(value);
update();
}
}
void ChessWidget::config_bool_did_change(DeprecatedString const& domain, DeprecatedString const& group, DeprecatedString const& key, bool value)
{
if (domain != "Games"sv && group != "Chess"sv)
return;
if (key == "ShowCoordinates"sv) {
set_coordinates(value);
update();
} else if (key == "HighlightChecks"sv) {
set_highlight_checks(value);
update();
}
}
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