This is only indirectly related to XMonad...
For a while I've been using keynav to avoid reaching for the mouse for
those few annoying circumstances which seemingly require a mouse.
I did find that keynav sometimes saved me some energy, but I only found it
useful for simple clicks. It does not seem useful if you want to click and
drag a region, for example.
Repeatedly bisecting the screen to narrow in on a point for the cursor is a
fine approach and has some advantages, but I found myself wanting something
more visceral: a little physics simulation to let me move the mouse around
using the keyboard, like a video game.
So I put this little utility together, in C++, and I have a keybinding
spawn it from xmonad.
It was an interesting challenge to make it single-threaded and still
simultaneously run the physics loop, poll for X events, and send fake mouse
events with XTest. I ended up designing it around channels (as in CSP)
using boost::fiber.
I hope someone finds it useful or entertaining! I had fun writing it.
https://github.com/blak3mill3r/mouser
Hello,
I am using xmonad on my Linux laptop and pdfpc
(https://pdfpc.github.io/) for presentation. pdfpc uses two windows, one
with current slide, next slides, notes etc. and the other one with the
presentation only. I usually use workspace 8 on my laptop with the
window with notes and workspace 9 on the projector with the presentation
window.
I sometimes switch workspaces to show code snippets in emacs etc. and I
want to be able to quickly restore the "pdfpc" workspaces. I use the
following binding:
((modMask .|. shiftMask , xK_p), (do windows (W.view "9");
swapNextScreen;
windows (W.view "8")))
which may not be the most elegant solution :)
Is there a more "haskell" way to do the same thing?
Best,
Christophe
--
Christophe Garion
GPG: 1982 15B2 64AC 3C34 532D BF19 6CD6 246C 62DA 5A7F
Er. What version of ghc? That sounds like either a ghc runtime bug, or a
system configuration issue. In particular, xmonad creates no threads
itself, so that would be the ghc runtime's IO manager thread.
On Fri, Nov 30, 2018 at 3:07 PM Dmitriy Matrosov <sgf.dma(a)gmail.com> wrote:
> On 11/30/2018 12:11 AM, Brandon Allbery wrote:
> > Yes. More specifically, it's ultimately using the execve() syscall, via
> > one of the wrappers which propagates the environment (which one depends
> > on whether it's asked to do $PATH search or not).
>
> So.. here is version using environment:
>
> import XMonad
> import XMonad.Operations
> import XMonad.Util.EZConfig
>
> import System.Environment
> import Control.Exception
>
> main :: IO ()
> main = do
> let xcf = def
> { modMask = mod4Mask
> , handleExtraArgs = disableKeysE
> }
> `additionalKeys`
> [ ((mod4Mask, xK_d), disableKeysOn) ]
> xmonad xcf
>
> disableKeysOn :: X ()
> disableKeysOn = do
> trace "Preparing to disable keys and restarting.."
> io $ setEnv "XMONAD_DISABLE_KEYS" "1"
> restart "xmonad" True
>
> disableKeysE :: [String] -> XConfig Layout -> IO (XConfig Layout)
> disableKeysE _ xcf = do
> me <- lookupEnv "XMONAD_DISABLE_KEYS"
> case me of
> Just _ -> do
> trace "Disabling all keys."
> unsetEnv "XMONAD_DISABLE_KEYS"
> return (xcf {keys = \_ -> mempty})
> Nothing -> return xcf
>
> It also restarts xmonad on key press (when disabling keys) and all
> works fine, but.. xmonad frequently crashes with
>
> xmonad: failed to create OS thread: Resource temporarily
> unavailable
>
> I don't think this crash relates somehow to using environment, and it
> happened from time to time before too, but still.. Can you advise,
> how to fix it?
>
> > On Thu, Nov 29, 2018 at 4:07 PM Dmitriy Matrosov <sgf.dma(a)gmail.com
> > <mailto:sgf.dma@gmail.com>> wrote:
> >
> > On 11/29/2018 09:50 PM, Brandon Allbery wrote:
> > > You were talking about restart, between the running xmonad and
> its
> > > replacement via executeFile. There, you can use the environment.
> > There
> > > is no way to pass information between an invoked "xmonad
> > --restart" and
> > > the running xmonad.
> >
> > You mean, `executeFile` preserves environment? So, i may change
> it from
> > running xmonad (by e.g. keybinding) and then restart it?
> >
> > > On Thu, Nov 29, 2018 at 6:01 AM Dmitriy Matrosov
> > <sgf.dma(a)gmail.com <mailto:sgf.dma@gmail.com>
> > > <mailto:sgf.dma@gmail.com <mailto:sgf.dma@gmail.com>>> wrote:
> > >
> > >
> > >
> > > On November 28, 2018 9:25:00 PM GMT+03:00, Brandon Allbery
> > > <allbery.b(a)gmail.com <mailto:allbery.b@gmail.com>
> > <mailto:allbery.b@gmail.com <mailto:allbery.b@gmail.com>>> wrote:
> > > >Not by default; there's already a bug (
> > > >https://github.com/xmonad/xmonad/issues/78) about our not
> > obeying the
> > > >ICCCM
> > > >replace protocol unless started by replacing some other WM.
> > > >
> > > >There's a few other places you can hide extra parameters;
> > starting
> > > that
> > > >early, the environment is probably the easiest to use,
> provided
> > > they're
> > > >not
> > > >too large (see why there's a state file now).
> > >
> > > Hm, i don't understand how to use environment. I need to pass
> > > something to running xmonad process (to which i send
> > > XMONAD_RESTART). As far as i know, i can't change
> environment of
> > > another process..
> > >
> > >
> > > >On Wed, Nov 28, 2018 at 1:20 PM Dmitriy Matrosov
> > > <sgf.dma(a)gmail.com <mailto:sgf.dma@gmail.com>
> > <mailto:sgf.dma@gmail.com <mailto:sgf.dma@gmail.com>>>
> > > >wrote:
> > > >
> > > >> Hi.
> > > >>
> > > >> On 11/21/2018 09:49 PM, Eyal Erez wrote:
> > > >> > Hi,
> > > >> >
> > > >> > I'm getting some collisions between my xmonad
> > keybindings and an
> > > >> > application I'm running (it's a game that is suppose to
> > run full
> > > >screen
> > > >> > but in reality just uses a large window). I was
> > wondering if I
> > > >could
> > > >> > suspend or change some keybindings from a script that I
> > can run
> > > >before
> > > >> > the app launches and then restore later.
> > > >> >
> > > >> > Is this at all possible? Happy to entertain other
> options.
> > > >>
> > > >> Here is proof of concept:
> > > >>
> > > >>
> > > >> import XMonad
> > > >> import XMonad.Hooks.EwmhDesktops
> > > >>
> > > >> import System.Directory
> > > >> import System.FilePath
> > > >>
> > > >>
> > > >> main :: IO ()
> > > >> main = do
> > > >> let xcf = ewmh $ def
> > > >> { modMask = mod4Mask
> > > >> , handleExtraArgs =
> disableKeys
> > > >> }
> > > >> xmonad xcf
> > > >>
> > > >> disableKeys :: [String] -> XConfig Layout -> IO
> > (XConfig
> > > >Layout)
> > > >> disableKeys _ xcf = do
> > > >> xd <- getXMonadDir
> > > >> let disableFn = xd </> "disable_keys"
> > > >> b <- doesFileExist disableFn
> > > >> if b
> > > >> then do
> > > >> trace "Disabling all keys."
> > > >> removeFile disableFn
> > > >> return (xcf {keys = \_ -> mempty})
> > > >> else return xcf
> > > >>
> > > >>
> > > >> To disable all keys create file `~/.xmonad/disable_keys`
> > and then
> > > >> restart xmonad with `xmonad --restart`. All keys will be
> > disabled
> > > >> _and_ file deleted (to avoid locking yourself), thus next
> > restart
> > > >will
> > > >> restore all keys back.
> > > >>
> > > >> As far as i understand, xmonad grabs keys in
> > `X.Main.launch` before
> > > >> entering main loop. Thus, the one way to change key grab
> > is to
> > > >restart
> > > >> xmonad. I need to modify `XConfig` before calling
> > > X.Main.launch`, and
> > > >> this may be done by `handleExtraArgs` (called in
> `launch'` in
> > > >> `X.Main.xmonad`). Unfortunately, it seems, that xmonad
> > does not
> > > allow
> > > >> to pass extra cmd arguments during restart
> > (`X.Operations.restart`
> > > >> always starts xmonad with name `xmonad` and no
> > arguments). Also, i
> > > >> can't use extensible state in `handleExtraArgs`, because
> > it runs in
> > > >> `IO` (`X` context is not yet built at that time). Thus,
> > to pass
> > > >> something to it, i may use either file or (probably)
> > > `--replace`. The
> > > >> above version uses file. And i have no luck with
> > `--replace`: it
> > > >> seems, `xmonad` can't replace itself?..
> > > >> _______________________________________________
> > > >> xmonad mailing list
> > > >> xmonad(a)haskell.org <mailto:xmonad@haskell.org>
> > <mailto:xmonad@haskell.org <mailto:xmonad@haskell.org>>
> > > >> http://mail.haskell.org/cgi-bin/mailman/listinfo/xmonad
> > > >>
> > > _______________________________________________
> > > xmonad mailing list
> > > xmonad(a)haskell.org <mailto:xmonad@haskell.org>
> > <mailto:xmonad@haskell.org <mailto:xmonad@haskell.org>>
> > > http://mail.haskell.org/cgi-bin/mailman/listinfo/xmonad
> > >
> > >
> > >
> > > --
> > > brandon s allbery kf8nh
> > > allbery.b(a)gmail.com <mailto:allbery.b@gmail.com>
> > <mailto:allbery.b@gmail.com <mailto:allbery.b@gmail.com>>
> >
> > _______________________________________________
> > xmonad mailing list
> > xmonad(a)haskell.org <mailto:xmonad@haskell.org>
> > http://mail.haskell.org/cgi-bin/mailman/listinfo/xmonad
> >
> >
> >
> > --
> > brandon s allbery kf8nh
> > allbery.b(a)gmail.com <mailto:allbery.b@gmail.com>
>
>
--
brandon s allbery kf8nh
allbery.b(a)gmail.com
Hi,
The wiki is not updated to include information about how to install Xmonad
on Ubuntu Bionic Beaver -
https://wiki.haskell.org/Xmonad/Using_xmonad_in_Gnome#Ubuntu
Could you tell me how to make xmonad work with Ubuntu 18.04(Gnome3)?
Regards,
--
Pratyush Das(Reik)
