void Widget::addChild(Widget::Ptr child) {
if (child->parent().get() != this) {
return child->setParent(shared_from_this());
}
m_children.push_back(child);
}
void Widget::removeChild(Widget::Ptr child) {
if (child->parent() != 0) {
return child->setParent(0);
}
auto it = std::find(m_children.begin(), m_children.end(), child);
if (it != m_children.begin()) {
m_children.erase(it);
}
}