template<
        ui_event sdl_button_down_t,
        ui_event sdl_button_up_t,
        ui_event button_down_t,
        ui_event button_up_t,
        ui_event button_click_t,
        ui_event button_double_click_t>
struct mouse_button_event_types_wrapper
{
    const ui_event sdl_button_down       = sdl_button_down_t;
    const ui_event sdl_button_up         = sdl_button_up_t;
    const ui_event button_down           = button_down_t;
    const ui_event button_up             = button_up_t;
    const ui_event button_click          = button_click_t;
    const ui_event button_double_click   = button_double_click_t;
};