尝试将一个简单的按钮绑定到SFGUI中的OnClick函数

#include <SFGUI/Button.hpp>

sfg::SfmlRenderer renderer;
sfg::Desktop desktop;
sf::RenderWindow window(sf::VideoMode(800, 600), "SFGUI Button Example");
window.resetGLStates();
desktop.SetRenderer(renderer);

auto button = sfg::Button::Create("Click me!");
button->SetPosition(sf::Vector2f(100, 100));

void OnClick() {
    // 处理按钮点击事件的逻辑代码
    std::cout << "Button clicked!" << std::endl;
}

button->GetSignal(sfg::Button::OnLeftClick).Connect(&OnClick);

desktop.Add(button);

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

    window.clear();
    renderer.BeginDraw();
    desktop.Update(0.f);
    renderer.EndDraw();
    window.display();
}