Method insertChild

snap_drawing/src/snap_drawing/cpp/Layers/Layer.cpp:218–246

}

void Layer::insertChild(const Valdi::Ref<Layer>& childLayer, size_t index) {
    SC_ASSERT(this != childLayer.get());

    if (childLayer->_hasParent) {
        bool shouldNotify = childLayer->getParent().get() != this;
        childLayer->removeFromParent(shouldNotify);
    }

    {
        auto children = _children.writeAccess();
        SC_ASSERT(index <= children->size());
        if (index == children->size()) {
            children->emplace_back(childLayer);
        } else {
            children->emplace(children->begin() + index, childLayer);
        }
    }

    childLayer->onParentChanged(Valdi::strongSmallRef(this));

    setChildNeedsDisplay();

    onChildInserted(childLayer.get(), index);

    if (childLayer->_needsLayout) {
        setNeedsLayout();
    }
    childLayer->setNeedsDisplay();
}

void Layer::onChildInserted(Layer* /*childLayer*/, size_t /*index*/) {}