Method update_data

src/GUIStuff/Elements/TextBox.impl.hpp:281–289

}

template <typename T> bool TextBox<T>::update_data() {
    std::optional<T> dataToAssign = userInfo.fromStr(textbox->get_string());
    if(dataToAssign.has_value()) {
        *userInfo.data = dataToAssign.value();
        oldData = dataToAssign;
        return true;
    }
    return false;
}

template <typename T> TextBox<T>::~TextBox() {
    if(is_selected())