Method LabelUnderline

tests/cpp-tests/Source/LabelTest/LabelTest.cpp:3549–3587

///

LabelUnderline::LabelUnderline()
{
    auto s = Director::getInstance()->getWinSize();

    // LabelBMFont
    auto label1 =
        Label::createWithBMFont("fonts/bitmapFontTest2.fnt", "hello non-underline", TextHAlignment::CENTER, s.width);
    addChild(label1, 0, kTagBitmapAtlas1);
    label1->setPosition(Vec2(s.width / 2, s.height * 4 / 6));
    // you can enable italics by calling this method

    _label1a = Label::createWithBMFont("fonts/bitmapFontTest2.fnt", "hello underline", TextHAlignment::CENTER, s.width);
    addChild(_label1a, 0, kTagBitmapAtlas1);
    _label1a->setPosition(Vec2(s.width / 2, s.height * 3 / 6));
    // you can enable underline by calling this method
    _label1a->enableUnderline();

    // LabelTTF
    TTFConfig ttfConfig("fonts/arial.ttf", 24);
    auto label2 = Label::createWithTTF(ttfConfig, "hello non-underline", TextHAlignment::CENTER, s.width);
    addChild(label2, 0, kTagBitmapAtlas2);
    label2->setPosition(Vec2(s.width / 2, s.height * 2 / 6));

    // or by setting the italics parameter on TTFConfig
    ttfConfig.underline = true;
    _label2a            = Label::createWithTTF(ttfConfig, "hello underline", TextHAlignment::CENTER, s.width);
    addChild(_label2a, 0, kTagBitmapAtlas2);
    _label2a->setPosition(Vec2(s.width / 2, s.height * 1 / 6));

    auto menuItem = MenuItemFont::create("disable underline", [&](ax::Object* sender) {
        _label2a->disableEffect(LabelEffect::UNDERLINE);
        _label1a->disableEffect(LabelEffect::UNDERLINE);
    });
    menuItem->setFontSizeObj(12);
    auto menu = Menu::createWithItem(menuItem);
    addChild(menu);
    auto winSize = Director::getInstance()->getWinSize();
    menu->setPosition(winSize.width * 0.9, winSize.height * 0.25f);
}

std::string LabelUnderline::title() const
{