Method add_button

crawl-ref/source/outer-menu.cc:281–319

}

void OuterMenu::add_button(shared_ptr<MenuButton> btn, int x, int y)
{
    ASSERT(x >= 0 && x < m_width);
    ASSERT(y >= 0 && y < m_height);

    MenuButton*& item = m_buttons[y*m_width + x];
    ASSERT(item == nullptr);
    item = btn.get();

    // TODO: once we add event capturing, move handlers to menu
    btn->on_focusin_event([this, x, y](const Event&) {
        if (m_description_indexes[y*this->m_width+x] != -1)
            descriptions->current() = m_description_indexes[y*this->m_width+x];
        return false;
    });
    btn->on_mouseenter_event([btn](const MouseEvent&) {
        if (focus_button_on_mouseenter)
            ui::set_focused_widget(btn.get());
        return false;
    });
    btn->on_mousemove_event([btn](const MouseEvent&) {
        ui::set_focused_widget(btn.get());
        return false;
    });

    if (descriptions)
    {
        auto desc_text = make_shared<Text>(formatted_string(btn->description, WHITE));
        desc_text->set_wrap_text(true);
        descriptions->add_child(std::move(desc_text));
        m_description_indexes[y*m_width + x] = descriptions->num_children()-1;
    }

    Widget *r = nullptr;
    for (Widget *p = btn.get(); p; p = p->_get_parent())
        r = p;
    ASSERT(r);
    m_grid->add_child(r->get_shared(), x, y);
}

void OuterMenu::scroll_button_into_view(MenuButton *btn)
{