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Chess: Highlight last move

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This commit is contained in:
Peter Elliott 2020-08-11 15:03:55 -06:00 • committed by Andreas Kling
parent f2c1782d86
commit 7b71f4759f
2 changed files with 49 additions and 39 deletions
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85
Games/Chess/ChessWidget.cpp
View file

@ -53,26 +53,29 @@ void ChessWidget::paint_event(GUI::PaintEvent& event)
size_t tile_width = width() / 8; size_t tile_width = width() / 8;
size_t tile_height = height() / 8; size_t tile_height = height() / 8;
for (unsigned rank = 0; rank < 8; ++rank) { Chess::Square::for_each([&](Chess::Square sq) {
for (unsigned file = 0; file < 8; ++file) { Gfx::IntRect tile_rect;
Gfx::IntRect tile_rect; if (side() == Chess::Colour::White) {
if (side() == Chess::Colour::White) { tile_rect = { sq.file * tile_width, (7 - sq.rank) * tile_height, tile_width, tile_height };
tile_rect = { file * tile_width, (7 - rank) * tile_height, tile_width, tile_height }; } else {
} else { tile_rect = { (7 - sq.file) * tile_width, sq.rank * tile_height, tile_width, tile_height };
tile_rect = { (7 - file) * tile_width, rank * tile_height, tile_width, tile_height }; }
}
painter.fill_rect(tile_rect, ((rank % 2) == (file % 2)) ? m_dark_square_color : m_light_square_color); painter.fill_rect(tile_rect, ((sq.rank % 2) == (sq.file % 2)) ? m_dark_square_color : m_light_square_color);
Chess::Square square = { rank, file }; if (m_last_move.has_value() && (m_last_move.value().to == sq || m_last_move.value().from == sq)) {
if (!(m_dragging_piece && square == m_moving_square)) { painter.fill_rect(tile_rect, m_move_highlight_color);
auto bmp = m_pieces.get(board().get_piece(square)); }
if (bmp.has_value()) {
painter.draw_scaled_bitmap(tile_rect, *bmp.value(), bmp.value()->rect()); if (!(m_dragging_piece && sq == m_moving_square)) {
} auto bmp = m_pieces.get(board().get_piece(sq));
if (bmp.has_value()) {
painter.draw_scaled_bitmap(tile_rect, *bmp.value(), bmp.value()->rect());
} }
} }
}
return IterationDecision::Continue;
});
if (m_dragging_piece) { if (m_dragging_piece) {
auto bmp = m_pieces.get(board().get_piece(m_moving_square)); auto bmp = m_pieces.get(board().get_piece(m_moving_square));
@ -111,32 +114,36 @@ void ChessWidget::mouseup_event(GUI::MouseEvent& event)
auto target_square = mouse_to_square(event); auto target_square = mouse_to_square(event);
if (board().apply_move({ m_moving_square, target_square }) && board().game_result() != Chess::Result::NotFinished) { if (board().apply_move({ m_moving_square, target_square })) {
set_drag_enabled(false); m_last_move = Chess::Move(m_moving_square, target_square);
update();
String msg; if (board().game_result() != Chess::Result::NotFinished) {
switch (board().game_result()) { set_drag_enabled(false);
case Chess::Result::CheckMate: update();
if (board().turn() == Chess::Colour::White) {
msg = "Black wins by Checkmate."; String msg;
} else { switch (board().game_result()) {
msg = "White wins by Checkmate."; case Chess::Result::CheckMate:
if (board().turn() == Chess::Colour::White) {
msg = "Black wins by Checkmate.";
} else {
msg = "White wins by Checkmate.";
}
break;
case Chess::Result::StaleMate:
msg = "Draw by Stalemate.";
break;
case Chess::Result::FiftyMoveRule:
msg = "Draw by 50 move rule.";
break;
case Chess::Result::ThreeFoldRepitition:
msg = "Draw by threefold repitition.";
break;
default:
ASSERT_NOT_REACHED();
} }
break; GUI::MessageBox::show(window(), msg, "Game Over", GUI::MessageBox::Type::Information);
case Chess::Result::StaleMate:
msg = "Draw by Stalemate.";
break;
case Chess::Result::FiftyMoveRule:
msg = "Draw by 50 move rule.";
break;
case Chess::Result::ThreeFoldRepitition:
msg = "Draw by threefold repitition.";
break;
default:
ASSERT_NOT_REACHED();
} }
GUI::MessageBox::show(window(), msg, "Game Over");
} }
update(); update();

3
Games/Chess/ChessWidget.h
View file

@ -29,6 +29,7 @@
#include "Chess.h" #include "Chess.h"
#include <AK/HashMap.h> #include <AK/HashMap.h>
#include <AK/NonnullRefPtr.h> #include <AK/NonnullRefPtr.h>
#include <AK/Optional.h>
#include <AK/StringView.h> #include <AK/StringView.h>
#include <LibGUI/Widget.h> #include <LibGUI/Widget.h>
#include <LibGfx/Bitmap.h> #include <LibGfx/Bitmap.h>
@ -63,6 +64,7 @@ private:
Chess m_board; Chess m_board;
Color m_dark_square_color { Color::from_rgb(0xb58863) }; Color m_dark_square_color { Color::from_rgb(0xb58863) };
Color m_light_square_color { Color::from_rgb(0xf0d9b5) }; Color m_light_square_color { Color::from_rgb(0xf0d9b5) };
Color m_move_highlight_color { Color::from_rgba(0x66ccee00) };
Chess::Colour m_side { Chess::Colour::White }; Chess::Colour m_side { Chess::Colour::White };
HashMap<Chess::Piece, RefPtr<Gfx::Bitmap>> m_pieces; HashMap<Chess::Piece, RefPtr<Gfx::Bitmap>> m_pieces;
String m_piece_set; String m_piece_set;
@ -70,4 +72,5 @@ private:
Gfx::IntPoint m_drag_point; Gfx::IntPoint m_drag_point;
bool m_dragging_piece { false }; bool m_dragging_piece { false };
bool m_drag_enabled { true }; bool m_drag_enabled { true };
Optional<Chess::Move> m_last_move;
}; };