在SFML中居中按钮顶部的文本

#include <SFML/Graphics.hpp>

int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML Button");

    // 创建按钮
    sf::RectangleShape button(sf::Vector2f(200, 50));
    button.setPosition(300, 250);
    button.setFillColor(sf::Color::Blue);

    // 创建文本
    sf::Font font;
    font.loadFromFile("arial.ttf");
    sf::Text text("Button", font, 24);
    text.setFillColor(sf::Color::White);

    // 获取按钮的位置和大小
    sf::FloatRect buttonBounds = button.getGlobalBounds();

    // 计算文本的居中位置
    sf::FloatRect textBounds = text.getLocalBounds();
    float textX = buttonBounds.left + (buttonBounds.width - textBounds.width) / 2;
    float textY = buttonBounds.top + (buttonBounds.height - textBounds.height) / 2;

    // 设置文本的位置为居中位置
    text.setPosition(textX, textY);

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
        }

        window.clear();
        window.draw(button);
        window.draw(text);
        window.display();
    }

    return 0;
}