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LibCards: Support "previewing" cards that may be covered by other cards

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For example, in Solitaire, the vertical normal stacks cover the suit of
all but the topmost card in the stack. To see the suit of covered cards
the user currently has to move the cards on top of them out of the way.

This adds an API for games to set a card at a location to be previewed,
which will draw that card on top of all other cards without moving it.
This commit is contained in:
Timothy Flynn 2023-01-06 08:25:38 -05:00 • committed by Linus Groh
parent c0bc3b9814
commit 2a1fb77faf
5 changed files with 67 additions and 0 deletions
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37
Userland/Libraries/LibCards/CardStack.cpp
View file

@ -93,12 +93,23 @@ void CardStack::paint(GUI::Painter& painter, Gfx::Color background_color)
return;
}
RefPtr<Card> previewed_card;
for (size_t i = 0; i < m_stack.size(); ++i) {
if (auto& card = m_stack[i]; !card.is_moving()) {
if (card.is_previewed()) {
VERIFY(!previewed_card);
previewed_card = card;
continue;
}
auto highlighted = m_highlighted && (i == m_stack.size() - 1);
card.clear_and_paint(painter, Gfx::Color::Transparent, highlighted);
}
}
if (previewed_card)
previewed_card->clear_and_paint(painter, Gfx::Color::Transparent, false);
}
void CardStack::rebound_cards()
@ -239,6 +250,32 @@ bool CardStack::is_allowed_to_push(Card const& card, size_t stack_size, Movement
return true;
}
bool CardStack::preview_card(Gfx::IntPoint click_location)
{
RefPtr<Card> last_intersect;
for (auto& card : m_stack) {
if (!card.rect().contains(click_location))
continue;
if (card.is_upside_down())
continue;
last_intersect = card;
}
if (!last_intersect)
return false;
last_intersect->set_previewed(true);
return true;
}
void CardStack::clear_card_preview()
{
for (auto& card : m_stack)
card.set_previewed(false);
}
bool CardStack::make_top_card_visible()
{
if (is_empty())