Method KeyboardView

examples/keyboard/Keyboard.cpp:312–357

{
public:
    explicit KeyboardView(const sf::Font& font) : m_labels(sf::Keyboard::ScancodeCount, sf::Text(font, "", 14))
    {
        // Check all the scancodes are in the matrix exactly once
        {
            std::unordered_set<sf::Keyboard::Scancode> scancodesInMatrix;
            for (const auto& [cells, marginBottom] : m_matrix)
            {
                for (const auto& [scancode, size, marginRight] : cells)
                {
                    assert(scancodesInMatrix.count(scancode) == 0);
                    scancodesInMatrix.insert(scancode);
                }
            }
            assert(scancodesInMatrix.size() == sf::Keyboard::ScancodeCount);
        }

        // Initialize keys color and label
        forEachKey(
            [this](sf::Keyboard::Scancode scancode, const sf::FloatRect& rect)
            {
                const auto scancodeIndex = static_cast<std::size_t>(scancode);

                for (std::size_t vertexIndex = 0u; vertexIndex < 6u; ++vertexIndex)
                    m_triangles[6u * scancodeIndex + vertexIndex]
                        .color = sf::Keyboard::delocalize(sf::Keyboard::localize(scancode)) != scancode
                                     ? sf::Color::Red
                                     : sf::Color::White;

                sf::Text& label = m_labels[scancodeIndex];
                label.setString(sf::Keyboard::getDescription(scancode));
                label.setPosition(rect.position + rect.size / 2.f);

                if (rect.size.x < label.getLocalBounds().size.x + padding * 2.f + 2.f)
                {
                    sf::String string = label.getString();
                    string.replace(" ", "\n");
                    label.setString(string);
                }
                while (rect.size.x < label.getLocalBounds().size.x + padding * 2.f + 2.f)
                    label.setCharacterSize(label.getCharacterSize() - 2);

                const sf::FloatRect bounds = label.getLocalBounds();
                label.setOrigin({std::round(bounds.position.x + bounds.size.x / 2.f),
                                 std::round(static_cast<float>(label.getCharacterSize()) / 2.f)});
            });
    }

    void handle(const sf::Event& event)
    {