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Chess: Show available moves from current piece
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2 changed files with 26 additions and 0 deletions
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@ -155,6 +155,21 @@ void ChessWidget::paint_event(GUI::PaintEvent& event)
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}
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if (m_dragging_piece) {
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if (m_show_available_moves) {
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Gfx::IntPoint move_point;
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Gfx::IntPoint point_offset = { tile_width / 3, tile_height / 3 };
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Gfx::IntSize rect_size = { tile_width / 3, tile_height / 3 };
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for (const auto& square : m_available_moves) {
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if (side() == Chess::Color::White) {
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move_point = { square.file * tile_width, (7 - square.rank) * tile_height };
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} else {
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move_point = { (7 - square.file) * tile_width, square.rank * tile_height };
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}
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painter.fill_ellipse({ move_point + point_offset, rect_size }, Gfx::Color::LightGray);
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}
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}
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auto bmp = m_pieces.get(active_board.get_piece(m_moving_square));
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if (bmp.has_value()) {
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auto center = m_drag_point - Gfx::IntPoint(tile_width / 2, tile_height / 2);
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@ -170,6 +185,7 @@ void ChessWidget::mousedown_event(GUI::MouseEvent& event)
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if (event.button() == GUI::MouseButton::Right) {
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if (m_dragging_piece) {
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m_dragging_piece = false;
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m_available_moves.clear();
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} else {
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m_current_marking.from = mouse_to_square(event);
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}
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@ -183,6 +199,13 @@ void ChessWidget::mousedown_event(GUI::MouseEvent& event)
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m_dragging_piece = true;
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m_drag_point = event.position();
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m_moving_square = square;
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m_board.generate_moves([&](Chess::Move move) {
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if (move.from == m_moving_square) {
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m_available_moves.append(move.to);
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}
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return IterationDecision::Continue;
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});
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}
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update();
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@ -211,6 +234,7 @@ void ChessWidget::mouseup_event(GUI::MouseEvent& event)
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return;
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m_dragging_piece = false;
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m_available_moves.clear();
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auto target_square = mouse_to_square(event);
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@ -142,6 +142,8 @@ private:
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Gfx::IntPoint m_drag_point;
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bool m_dragging_piece { false };
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bool m_drag_enabled { true };
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bool m_show_available_moves { true };
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Vector<Chess::Square> m_available_moves;
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RefPtr<Engine> m_engine;
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bool m_coordinates { true };
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};
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