Re: Is it possible to catch ALT+TAB and do nothing

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James,

On Mon, May 7, 2018 at 4:46 PM, James Cameron <quozl@xxxxxxxxxx> wrote:
> On Mon, May 07, 2018 at 04:27:57PM -0500, Igor Korot wrote:
>> Paul et al,
>> Any idea how to configure FVWM to not to give focus to xterm if one
>> specific window is displayed?
>
> You might ask on an fvwm mailing list, but fvwm does have a
> NeverFocus method that can be applied to an application such as xterm.

Yes, just subscribed to their forum and will ask that question.
>
> http://www.fvwm.org/documentation/manpages/fvwm.html
>
> But that would just fix your problem for xterm; to enforce focus for a
> lock screen, there's more to do.  Have a look at the code for other
> lock screens to find out what that is.

We do not provide any external application where the user can interact
with the keyboard/focus handling
in order to try and guess the information that should be secured.
Only the xterm is a concern.

>
> Briefly, make a global mouse and keyboard grab, subscribe to window
> visibility events, and when they occur raise the window above whatever
> was stacked on top of it.
>
> You could also adjust xterm sources to ask for focus skip; bit 0 of
> _WIN_HINTS property.

Before going those routes I will see what FVWM people have to say...

Thank you for the suggestions though.

>
>>
>> I tried:
>>
>> [code]
>> Key <my_window_name> Tab A M WindowList("!xterm")
>> [/code]
>>
>> but it doesn't work.
>>
>> Thank you.
>>
>>
>> On Mon, May 7, 2018 at 12:44 PM, Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote:
>> > the window manager can intervene to catch more or less any key combinations
>> > the user has told it to be interested in. if the user told it use Alt-Tab
>> > for focus switching, it will catch that. you can't stop it.
>> >
>> > On Mon, May 7, 2018 at 12:52 PM, Igor Korot <ikorot01@xxxxxxxxx> wrote:
>> >>
>> >> Hi, Paul,
>> >>
>> >> On Mon, May 7, 2018 at 11:42 AM, Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx>
>> >> wrote:
>> >> > If there is a window manager (and there just about always is), you can't
>> >> > stop it from doing what it is configured to do. You're just an
>> >> > application,
>> >> > and it takes higher priority managing window events than you.
>> >>
>> >> Yes, we are using FVWM as WM.
>> >> I got a suggestion to write a function for this WM to stop the
>> >> Terminal to appear
>> >> when our Lock Screen is active, but here no one is familiar enough with
>> >> this WM
>> >> to write such a function.
>> >>
>> >> And I guess a different route is just not possible.
>> >>
>> >> And I would also guess that even if I put the "stay on top" flag,
>> >> pressing the ALT+TAB will
>> >> definitely switch the focus. Am I correct?
>> >>
>> >> Thank you.
>> >>
>> >> >
>> >> > On Mon, May 7, 2018 at 12:01 PM, Igor Korot <ikorot01@xxxxxxxxx> wrote:
>> >> >>
>> >> >>  Hi, ALL,
>> >> >> Is it possible to catch the ALT+TAB when one particular window is
>> >> >> displayed and do nothing, i.e. not switch to a different window?
>> >> >>
>> >> >> We have a program which displays a full sized window without the
>> >> >> title. Its role is to Lock screen" - user should not be able to do
>> >> >> anything until (s)he supplies password and hit the "Authenticate"
>> >> >> button.
>> >> >> problem is that t is possible to hit "ALT+TAB" and switch the focus to
>> >> >> the window below it (such as Terminal) and type something.
>> >> >>
>> >> >> We also can't use the lock screen window because of some other issues.
>> >> >>
>> >> >> So is it possible to catch ALT+TAB and do nothing for one specific
>> >> >> window?
>> >> >>
>> >> >> On the side note - is there a better list (with more traffic) where I
>> >> >> can post  question like this? Or this list is still good and
>> >> >> operational?
>> >> >>
>> >> >> Thank you.
>> >> >> _______________________________________________
>> >> >> gtk-list mailing list
>> >> >> gtk-list@xxxxxxxxx
>> >> >> https://mail.gnome.org/mailman/listinfo/gtk-list
>> >> >
>> >> >
>> >
>> >
>> _______________________________________________
>> gtk-list mailing list
>> gtk-list@xxxxxxxxx
>> https://mail.gnome.org/mailman/listinfo/gtk-list
>
> --
> James Cameron
> http://quozl.netrek.org/
> _______________________________________________
> gtk-list mailing list
> gtk-list@xxxxxxxxx
> https://mail.gnome.org/mailman/listinfo/gtk-list
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