bool has_focus(const sdl_handler* hand, const SDL_Event* event)
{
    if(event_contexts.empty()) {
        return true;
    }

    if(hand->requires_event_focus(event) == false) {
        return true;
    }

    const handler_list::iterator foc = event_contexts.back().focused_handler;

    //if no-one has focus at the moment, this handler obviously wants
    //focus, so give it to it.
    if(foc == handlers.end()) {
        focus_handler(hand);
        return true;
    }

    sdl_handler* const foc_hand = *foc;
    if(foc_hand == hand){
        return true;
    } else if(!foc_hand->requires_event_focus(event)) {
        //if the currently focused handler doesn't need focus for this event
        //allow the most recent interested handler to take care of it
        auto handlers& = event_contexts.back().handlers;

        //auto back = handlers.end();
        //--back;
        for(auto i = handlers.rbegin(); i != handlers.rend(); ++i) {
            sdl_handler* const thief_hand = *i;
            if(i != foc && thief_hand->requires_event_focus(event)) {
                //steal focus
                focus_handler(thief_hand);

                //position the previously focused handler to allow stealing back
                //event_contexts.back().delete_handler_index(foc);
                //event_contexts.back().add_handler(foc_hand);
                handlers.splice(handlers.end(), handlers, foc);

                return thief_hand == hand;
            }
        }
    }
    return false;
}