[英]Access instance from callback function
How can I access the class instance inside a GLFW3 input callback function, for example this one . 如何在GLFW3输入回调函数(例如this)中访问类实例。
I want my instance do something when a specific event happens. 我希望实例在发生特定事件时执行某些操作。 Each instance might do something different for a specific event.
每个实例可能会对特定事件执行不同的操作。
Specifically, my class has a std::map< int, std::function< void()>>, where a key is mapped to a function. 具体来说,我的班级有一个std :: map <int,std :: function <void()>>,其中一个键映射到一个函数。
EDIT: I tried the following, but this gives me an error that it doesn't match the glfwSetKeyCallback function call. 编辑:我尝试了以下操作,但这给我一个错误,它与glfwSetKeyCallback函数调用不匹配。
glfwSetKeyCallback(window, [this](GLFWwindow * window, int key, int scancode, int action, int mods){
addCommand(m_events.at(key));
});
You need something like this: 您需要这样的东西:
glfwSetWindowUserPointer(window, this);
glfwSetKeyCallback(window, [](GLFWwindow * window, int key, int scancode, int action, int mods){
Window * win = static_cast<Window *>(glfwGetWindowUserPointer(window));
win->addCommand(win->m_events.at(key));
});
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