glfw.py 文件源码

def set_window_pos_callback(window, cbfun):
    '''
    Sets the position callback for the specified window.

    Wrapper for:
        GLFWwindowposfun glfwSetWindowPosCallback(GLFWwindow* window, GLFWwindowposfun cbfun);
    '''
    window_addr = ctypes.cast(ctypes.pointer(window),
                              ctypes.POINTER(ctypes.c_long)).contents.value
    if window_addr in _window_pos_callback_repository:
        previous_callback = _window_pos_callback_repository[window_addr]
    else:
        previous_callback = None
    if cbfun is None:
        cbfun = 0
    c_cbfun = _GLFWwindowposfun(cbfun)
    _window_pos_callback_repository[window_addr] = (cbfun, c_cbfun)
    cbfun = c_cbfun
    _glfw.glfwSetWindowPosCallback(window, cbfun)
    if previous_callback is not None and previous_callback[0] != 0:
        return previous_callback[0]