On Fri, Jun 30, 2017 at 12:28 PM, Роман Мещеряков < roman.mescherya...@gmail.com> wrote:
> In my Python application running on Raspberry Pi under Raspbian I use > Pygame to display some software-generated images via framebuffer. I don’t > need any input from mouse, keyboard or any other devices, all I need is a > convenient way of using framebuffer. > > > > I initialize Pygame in the following way: > > Problem #1: I have mouse pointer at the top left corner of Pygame-drawn > images. I want mouse pointer to be hidden. > > I know that I can disable mouse pointer using pygame.mouse.set_visible, > but here comes > > Problem #2: I have to run my application with sudo in order for pygame to > not raise “ > > unable to open a console terminal” exception. But I want to run my > application without root rights, because this increases my application’s > security. > > There are some posts on forums that recommend setting SDL_NOMOUSE=1 > environment variable before initializing pygame which should skip mouse > initialization and maybe make it possible to get rid of sudo, but this > doesn’t work for me: I still need to use sudo and mouse pointer is still > there. > > If this makes any difference, I have no mouse or keyboard attached to the > Raspberry Pi, I connect to it using SSH. > > I use > > Pygame version 1.9.2~pre~r3348-2~bpo8+rpi1 > > libsdl-image1.2 version 1.2.12-5+b1 > > libsdl1.2debian version 1.2.15-10+rpi1 > > > > Does SDL_NOMOUSE work for anyone using recent Pygame versions? > > Is it possible to skip mouse initialization in Pygame? > > P.S. This question was originally posted on StackExchange > <https://raspberrypi.stackexchange.com/questions/69007/how-to-completely-disable-mouse-in-pygame>, > but it seems I chose the wrong section. For this reason or another, I > haven’t got any straight answer yet, so I write here and hope for the best > :) > Hi, It's not exactly clear to me what you're trying to do. It sounds like: *I want to SSH into a RPI, open a fullscreen window on it, and disable user input on that window entirely. However, the mouse cursor still shows on that window, and I can't disable it with `mouse.set_visible(...)` because that makes my program require root privileges.* If this is so, your code and attempts are more-or-less what I would have tried. I don't know enough about Debian to know if that permission error is insurmountable (I can think of a fairly good reason it should be; you don't want random users to be able to hijack already running graphical sessions, although I'd expect opening a fullscreen window would also require root privileges for the same reason). If it does turns out to be unworkable, is SSHing into the RPI and uploading images to an already-running daemon an answer? What exactly are you trying to do? Ian
