Thanks. I got the following error and though the message is really detailed, my total ignorance of Haskel doesn't allow me to fix it. Best regards Alain ------------------- Error detected while loading xmonad configuration file: /home/alain/.xmonad/xmonad.hs xmonad.hs:26:17: error:     * Ambiguous type variable `a0` arising from a use of `avoidStruts`       prevents the constraint `(Show a0)` from being solved.       Relevant bindings include         myLayoutHook :: XMonad.Layout.LayoutModifier.ModifiedLayout                           AvoidStruts                           (Choose                              Full                              (Choose                                 SpiralWithDir                                 (Choose                                    Tall (XMonad.Layout.LayoutModifier.ModifiedLayout XMonad.Layout.WindowArranger.WindowArranger SimplestFloat))))                           a0           (bound at xmonad.hs:26:2)       Probable fix: use a type annotation to specify what `a0` should be.       These potential instances exist:         instance Show Event -- Defined in `Graphics.X11.Xlib.Extras`         instance Show FontSet -- Defined in `Graphics.X11.Xlib.Extras`         instance [safe] Show Arc -- Defined in `Graphics.X11.Xlib.Types`         ...plus 54 others         ...plus 73 instances involving out-of-scope types         (use -fprint-potential-instances to see them all)     * In the expression:         avoidStruts           (Full ||| spiral (6 / 7) ||| Tall 1 0.03 0.5 ||| simplestFloat)       In an equation for `myLayoutHook`:           myLayoutHook             = avoidStruts                 (Full ||| spiral (6 / 7) ||| Tall 1 0.03 0.5 ||| simplestFloat)    | 26 |  myLayoutHook = avoidStruts  ( Full ||| spiral (6/7)  ||| Tall 1 0.03 0.5 ||| simplestFloat)    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------- On 12/06/2023 00:25, Brandon Allbery wrote:

You might want XMonad.Layout.SimplestFloat.

On 12/06/2023 00:46, Brandon Allbery wrote:

You're not actually using `myLayoutHook`, so the compiler can't determine the type of its layout. See line 34.

Many thanks. I join the corrected xmonad.hs file in case it could be useful to somebody. Best regards, Alain

Hi, Thanks for this suggestion. As it turned out, the app I want to use has unfriendly behaviour even with XMonad.Layout.SimplestFloat and I think that I will need to use this solution. Best regards, Alain On 12/06/2023 09:34, Platon Pronko wrote:

On 2023-06-12 06:19, Alain Bertrand wrote:

...

Hello,

I have a program which doesn't work nicely with xmonad because of the apparition of popup windows, supposed to be small but who take suddenly half the size of the screen.

Is there a layout for xmonad which would (un)manages windows just like, say Openbox  ?

I use myManageHook for floating or ignoring such popup windows. This way you can keep your usual layout and only add some special cases for misbehaving windows.

Something like this:

myManageHook :: ManageHook myManageHook =   composeAll   [ fmap (isInfixOf "Gnuplot") title --> doFloat   , className =? "Xfce4-panel" --> doIgnore   , className =? "Yad" --> doFloat   , isInProperty "_NET_WM_WINDOW_TYPE" "_NET_WM_WINDOW_TYPE_TOOLBAR" --> doIgnore -- fix for libreoffice dialogs   , isInProperty "_NET_WM_WINDOW_TYPE" "_NET_WM_WINDOW_TYPE_SPLASH" --> doIgnore -- splash screens   , isFullscreen --> doFullFloat   , isDialog --> doFloat   , role =? "pop-up" --> doFloat   ]

(you can check the window properties using xprop utility)