Method _move_child

scene/main/node.cpp:524–579

}

void Node::_move_child(Node *p_child, int p_index, bool p_ignore_end) {
	ERR_FAIL_COND_MSG(data.blocked > 0, "Parent node is busy setting up children, `move_child()` failed. Consider using `move_child.call_deferred(child, index)` instead (or `popup.call_deferred()` if this is from a popup).");

	// Specifying one place beyond the end
	// means the same as moving to the last index
	if (!p_ignore_end) { /// @todo p_ignore_end is a little hack to make back internal children work properly.
		if (p_child->data.internal_mode == INTERNAL_MODE_FRONT) {
			if (p_index == data.internal_children_front_count_cache) {
				p_index--;
			}
		} else if (p_child->data.internal_mode == INTERNAL_MODE_BACK) {
			if (p_index == (int)data.children_cache.size()) {
				p_index--;
			}
		} else {
			if (p_index == (int)data.children_cache.size() - data.internal_children_back_count_cache) {
				p_index--;
			}
		}
	}

	int child_index = p_child->get_index();

	if (child_index == p_index) {
		return; //do nothing
	}

	int motion_from = MIN(p_index, child_index);
	int motion_to = MAX(p_index, child_index);

	data.children_cache.remove_at(child_index);
	data.children_cache.insert(p_index, p_child);

	if (data.tree) {
		data.tree->tree_changed();
	}

	data.blocked++;
	//new pos first
	for (int i = motion_from; i <= motion_to; i++) {
		if (data.children_cache[i]->data.internal_mode == INTERNAL_MODE_DISABLED) {
			data.children_cache[i]->data.index = i - data.internal_children_front_count_cache;
		} else if (data.children_cache[i]->data.internal_mode == INTERNAL_MODE_BACK) {
			data.children_cache[i]->data.index = i - data.internal_children_front_count_cache - data.external_children_count_cache;
		} else {
			data.children_cache[i]->data.index = i;
		}
	}
	// notification second
	move_child_notify(p_child);
	notification(NOTIFICATION_CHILD_ORDER_CHANGED);
	emit_signal(SNAME("child_order_changed"));
	p_child->_propagate_groups_dirty();

	data.blocked--;
}

void Node::_propagate_groups_dirty() {