Pointing to a function that is a class member - glfw setKeycallback

Question

I\'m writing a glfw app, in which I\'ve wrapped the function callse into a simple class. Im having trouble setting the key callback. My class is defined as:

Answer 1

Inspired by N0vember's answer, I present you even more generic and dynamic solution:

class MyGlWindow {
public:
    std::function onClose;
    std::function onMouseClick = [](auto self, int, int, int) { /*some default behavior*/ };
};

void makeWindow() {
    GLFWwindow* glfwWindow;
    MyGlWindow* myWindow;

    /* ... Initialize everything here ... */

    glfwSetWindowUserPointer(glfwWindow, myWindow);

    #define genericCallback(functionName)\
        [](GLFWwindow* window, auto... args) {\
            auto pointer = static_cast(glfwGetWindowUserPointer(window));\
            if (pointer->functionName) pointer->functionName(pointer, args...);\
        }

    glfwSetWindowCloseCallback(glfwWindow, genericCallback(onClose));
    glfwSetMouseButtonCallback(glfwWindow, genericCallback(onMouseClick));

    myWindow->onMouseClick = [](auto self, int, int, int) {
        std::cout << "I'm such a rebel" << std::endl;
        self->onClose = [](auto self) {
            std::cout << "I'm such a rebellion" << std::endl;
        };
    };
}