错误：没有匹配的函数调用'sf::RenderWindow::draw(<未解析的重载函数类型>)'| C++ 中的 SFML

我尝试创建一个Button类并将其与 SFML 一起使用，不幸的是，它产生了以下错误：no matching function for call to 'sf::RenderWindow::draw(<unresolved overloaded function type>)'|等等。

这是代码：

void onclic(){

                    cout << "Clicked";

                }

class Button{

public:

    string ButtonText;

    Color color;

    int sizee;

    int x;

    int y;

    RenderWindow winname;

    void func(){

        cout << "\n";

    }

    void Butt(string ButtonText, Color color, int sizee, int x, int y, function<void()> funcc, RenderWindow winname){

        Text tt;

        tt.setString(ButtonText);

        tt.setColor(color);

        tt.setPosition(x, y);

        tt.setCharacterSize(sizee);

        Event e;

        while (winname.pollEvent(e)) {

            switch (e.type) {
        case Event::MouseButtonPressed:

            funcc();

            }
        }

    }

};

int main() {

    sf::RenderWindow sfmlWin;

    sfmlWin.setTitle("Hello!");

    sf::Font font;
    if (!font.loadFromFile("Raleway-Regular.ttf")) {

                               while (sfmlWin.isOpen()) {

        sf::Event e;
        while (sfmlWin.pollEvent(e)) {

            switch (e.type) {
            case sf::Event::EventType::Closed:

                using namespace sf;

                Text t;

                t.setCharacterSize(20);

                t.setString("Something");

                sfmlWin.draw(t);

            }
        }

        sfmlWin.clear();
        sfmlWin.draw(t);
        sfmlWin.display();
    }

        return -1;
    }


    sf::Text message("Hello, World!", font);

    while (sfmlWin.isOpen()) {

        sf::Event e;
        while (sfmlWin.pollEvent(e)) {

            switch (e.type) {
            case sf::Event::EventType::Closed:

                using namespace sf;

                Text t;

                t.setString("Something");

                sfmlWin.draw(t);

                Button buttt;

                Color col(0,255,0);

                buttt.Butt("CLICK!", col, 20, 50, 50, onclic, sfmlWin);

                sfmlWin.draw(buttt.Butt);

            }
        }

        if (e.type == sf::Event::MouseButtonPressed)
{
    if (e.mouseButton.button == sf::Mouse::Left)
    {

        if(e.mouseButton.x >= 20 && e.mouseButton.y >= 20 && e.mouseButton.x <= 40 && e.mouseButton.y <= 40){

            cout << "Pressed.";

        }

    }
}

        sfmlWin.clear();
        sfmlWin.draw(message);
        sfmlWin.display();


    }


    return 0;
}

这是 Code::Blocks 中 Build 日志中的第一个错误。error: use of deleted function 'sf::RenderWindow::RenderWindow(const sf::RenderWindow&)'.

下一行是 In file included from C:\...\SFML-2.5.1-windows-gcc-7.3.0-mingw-64-bit\SFML-2.5.1\include/SFML/Graphics.hpp:47, from E:\something.cpp:4: C:\Users\...\SFML-2.5.1-windows-gcc-7.3.0-mingw-64-bit\SFML-2.5.1\include/SFML/Graphics/RenderWindow.hpp:44:25: note: 'sf::RenderWindow::RenderWindow(const sf::RenderWindow&)' is implicitly deleted because the default definition would be ill-formed: class SFML_GRAPHICS_API RenderWindow : public Window, public RenderTarget ^~~~~~~~~~~~

我哪里做错了？任何的想法？

我是 C++ 的新手，所以请放轻松。

提前致谢！