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Spider: Make the last move undoable

The lets the user undo the last card move. Card moves which cause
cards to be moved to the waste stack cannot be undone.
This commit is contained in:
Gunnar Beutner 2022-10-15 12:49:56 +02:00 committed by Gunnar Beutner
parent 6d18164ab0
commit c97421eabe
3 changed files with 73 additions and 0 deletions

View file

@ -37,6 +37,9 @@ void Game::setup(Mode mode)
m_mode = mode;
if (on_undo_availability_change)
on_undo_availability_change(false);
if (on_game_end)
on_game_end(GameOverReason::NewGame, m_score);
@ -74,6 +77,28 @@ void Game::setup(Mode mode)
update();
}
void Game::perform_undo()
{
if (m_last_move.type == LastMove::Type::Invalid)
return;
if (!m_last_move.was_visible)
m_last_move.from->peek().set_upside_down(true);
NonnullRefPtrVector<Card> cards;
for (size_t i = 0; i < m_last_move.card_count; i++)
cards.append(m_last_move.to->pop());
for (ssize_t i = m_last_move.card_count - 1; i >= 0; i--)
m_last_move.from->push(cards[i]);
update_score(-1);
m_last_move = {};
if (on_undo_availability_change)
on_undo_availability_change(false);
invalidate_layout();
}
void Game::start_timer_if_necessary()
{
if (on_game_start && m_waiting_for_new_game) {
@ -141,6 +166,9 @@ void Game::detect_full_stacks()
update(current_pile.peek().rect());
update_score(101);
if (on_undo_availability_change)
on_undo_availability_change(false);
}
last_value = to_underlying(card.rank());
@ -159,6 +187,9 @@ void Game::detect_victory()
return;
}
if (on_undo_availability_change)
on_undo_availability_change(false);
if (on_game_end)
on_game_end(GameOverReason::Victory, m_score);
}
@ -198,6 +229,17 @@ void Game::paint_event(GUI::PaintEvent& event)
}
}
void Game::remember_move_for_undo(CardStack& from, CardStack& to, size_t card_count, bool was_visible)
{
m_last_move.type = LastMove::Type::MoveCards;
m_last_move.from = &from;
m_last_move.card_count = card_count;
m_last_move.to = &to;
m_last_move.was_visible = was_visible;
if (on_undo_availability_change)
on_undo_availability_change(true);
}
void Game::mousedown_event(GUI::MouseEvent& event)
{
GUI::Frame::mousedown_event(event);
@ -239,7 +281,10 @@ void Game::mousedown_event(GUI::MouseEvent& event)
void Game::move_focused_cards(CardStack& stack)
{
auto card_count = moving_cards().size();
drop_cards_on_stack(stack, Cards::CardStack::MovementRule::Any);
bool was_visible = moving_cards_source_stack()->is_empty() || !moving_cards_source_stack()->peek().is_upside_down();
remember_move_for_undo(*moving_cards_source_stack(), stack, card_count, was_visible);
update_score(-1);
moving_cards_source_stack()->make_top_card_visible();
detect_full_stacks();