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Chess: Show available moves from current piece

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This commit is contained in:
lucastarche 2021-03-27 17:59:54 -03:00 • committed by Andreas Kling
parent 52ce7ed842
commit 42f7f9d0f8
2 changed files with 26 additions and 0 deletions
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24
Userland/Games/Chess/ChessWidget.cpp
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@ -155,6 +155,21 @@ void ChessWidget::paint_event(GUI::PaintEvent& event)
}
if (m_dragging_piece) {
if (m_show_available_moves) {
Gfx::IntPoint move_point;
Gfx::IntPoint point_offset = { tile_width / 3, tile_height / 3 };
Gfx::IntSize rect_size = { tile_width / 3, tile_height / 3 };
for (const auto& square : m_available_moves) {
if (side() == Chess::Color::White) {
move_point = { square.file * tile_width, (7 - square.rank) * tile_height };
} else {
move_point = { (7 - square.file) * tile_width, square.rank * tile_height };
}
painter.fill_ellipse({ move_point + point_offset, rect_size }, Gfx::Color::LightGray);
}
}
auto bmp = m_pieces.get(active_board.get_piece(m_moving_square));
if (bmp.has_value()) {
auto center = m_drag_point - Gfx::IntPoint(tile_width / 2, tile_height / 2);
@ -170,6 +185,7 @@ void ChessWidget::mousedown_event(GUI::MouseEvent& event)
if (event.button() == GUI::MouseButton::Right) {
if (m_dragging_piece) {
m_dragging_piece = false;
m_available_moves.clear();
} else {
m_current_marking.from = mouse_to_square(event);
}
@ -183,6 +199,13 @@ void ChessWidget::mousedown_event(GUI::MouseEvent& event)
m_dragging_piece = true;
m_drag_point = event.position();
m_moving_square = square;
m_board.generate_moves([&](Chess::Move move) {
if (move.from == m_moving_square) {
m_available_moves.append(move.to);
}
return IterationDecision::Continue;
});
}
update();
@ -211,6 +234,7 @@ void ChessWidget::mouseup_event(GUI::MouseEvent& event)
return;
m_dragging_piece = false;
m_available_moves.clear();
auto target_square = mouse_to_square(event);

2
Userland/Games/Chess/ChessWidget.h
View file

@ -142,6 +142,8 @@ private:
Gfx::IntPoint m_drag_point;
bool m_dragging_piece { false };
bool m_drag_enabled { true };
bool m_show_available_moves { true };
Vector<Chess::Square> m_available_moves;
RefPtr<Engine> m_engine;
bool m_coordinates { true };
};