Method Label

core/2d/Label.cpp:498–555

}

Label::Label(TextHAlignment hAlignment /* = TextHAlignment::LEFT */,
             TextVAlignment vAlignment /* = TextVAlignment::TOP */)
    : _textSprite(nullptr)
    , _shadowNode(nullptr)
    , _fontAtlas(nullptr)
    , _reusedLetter(nullptr)
    , _horizontalKernings(nullptr)
    , _boldEnabled(false)
    , _lineDrawNode(nullptr)
    , _strikethroughEnabled(false)
    , _underlineEnabled(false)
{
    setAnchorPoint(Vec2::ANCHOR_MIDDLE);
    reset();
    _hAlignment = hAlignment;
    _vAlignment = vAlignment;

#if AX_LABEL_DEBUG_DRAW
    _debugDrawNode = DrawNode::create();
    AX_SAFE_RETAIN(_debugDrawNode);
#endif

    _purgeTextureListener = EventListenerCustom::create(FontAtlas::CMD_PURGE_FONTATLAS, [this](EventCustom* event) {
        if (_fontAtlas && _currentLabelType == LabelType::TTF && event->getUserData() == _fontAtlas)
        {
            for (auto&& it : _letters)
            {
                it.second->setTexture(nullptr);
            }
            _batchNodes.clear();
            _batchCommands.clear();

            if (_fontAtlas)
            {
                FontAtlasCache::releaseFontAtlas(_fontAtlas);
            }
        }
    });
    _eventDispatcher->addEventListenerWithFixedPriority(_purgeTextureListener, 1);

    _resetTextureListener = EventListenerCustom::create(FontAtlas::CMD_RESET_FONTATLAS, [this](EventCustom* event) {
        if (_fontAtlas && _currentLabelType == LabelType::TTF && event->getUserData() == _fontAtlas)
        {
            _fontAtlas      = nullptr;
            auto lineHeight = _lineHeight;
            this->setTTFConfig(_fontConfig);
            if (_currentLabelType != LabelType::STRING_TEXTURE)
            {
                setLineHeight(lineHeight);
            }
            for (auto&& it : _letters)
            {
                getLetter(it.first);
            }
        }
    });
    _eventDispatcher->addEventListenerWithFixedPriority(_resetTextureListener, 2);
}