cocos2d-x-3.x bringToFront & sendToBack实现

来源：互联网发布：cos定制知乎编辑：程序博客网时间：2024/06/13 00:34
void Node::bringToFront(void){    auto parent = this->getParent();    if (parent != nullptr && parent->getChildrenCount() >= 2) {        auto& siblings = parent->getChildren();        auto last = *siblings.rbegin();        auto topOrderOfArrival = last->getOrderOfArrival();        auto topLocalZOrder = last->getLocalZOrder();        for (size_t idx = siblings.size() - 1; idx > 0; --idx)        {            auto sibling = siblings.at(idx);            if (sibling != this) {                sibling->setOrderOfArrival(siblings.at(idx - 1)->getOrderOfArrival());                sibling->_setLocalZOrder(siblings.at(idx - 1)->getLocalZOrder());            }            else {                break;            }        }        this->setOrderOfArrival(topOrderOfArrival);        this->_setLocalZOrder(topLocalZOrder);        std::sort(std::begin(siblings), std::end(siblings), nodeComparisonLess);        _eventDispatcher->setDirtyForNode(this);    }}void Node::sendToBack(void){    auto parent = this->getParent();    if (parent != nullptr && parent->getChildrenCount() >= 2) {        auto& siblings = parent->getChildren();        auto start = *siblings.begin();        auto bottomOrderOfArrival = start->getOrderOfArrival();        auto bottomLocalZOrder = start->getLocalZOrder();                for (size_t idx = 0; idx < siblings.size() - 1; ++idx)        {            auto c = siblings.at(idx);            if (c != this) {                c->setOrderOfArrival(siblings.at(idx + 1)->getOrderOfArrival());                c->_setLocalZOrder(siblings.at(idx + 1)->getLocalZOrder());            }            else {                break;            }        }        this->setOrderOfArrival(bottomOrderOfArrival);        this->_setLocalZOrder(bottomLocalZOrder);        std::sort(std::begin(siblings), std::end(siblings), nodeComparisonLess);        _eventDispatcher->setDirtyForNode(this);    }}
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