WrapLabelText.cpp

void adjustFontSize(Label *label, const float &desiredSize)
{
    std::string str = label->getString();
    const float estimatedCharSize = label->getBoundingBox().size.width / label->getStringLength();
    const float columnNumberToWrap = desiredSize / estimatedCharSize;
    const float numberOfTimesToWrap = label->getBoundingBox().size.width / desiredSize;

    for (int i = 1; i < numberOfTimesToWrap; i++) {
        const int index = columnNumberToWrap * i;
        std::string splitter = std::isspace(str.at(index)) ? "\n" : "-\n";
        str.insert(index, splitter);
    }
    label->setString(str);
}