Re: FVWM: Problems with special application mapppings

On Thu, Mar 21, 2019 at 2:40 PM Klaus Ethgen <[email protected]> wrote:
> - From the documentation, the following mapping:
>    Key Up          A       M       Scroll +0   -10
>    Key (mpv) Up A M -
>
> Should bind alt-Up to the Scroll except in mpv window. But it also
> scrolls in mpv windown.
>

In the second command 'Key (mpv) Up A M -', the - removes the
keybinding. Since there is no specific key binding for mpv it uses
your global keybinding. From the documentation:

Key [(window)] Keyname Context Modifiers Function
Binds a keyboard key to a specified fvwm command, or removes the
binding if Function is '-'.

> When I do the scroll mapping as above but from command line I do
> `FvwmCommand 'Key (mpv) Up A M -'`, it does not work.
>

It does work, just not as you expected.

> So I tried `Key (mpv) Up A M Echo Up` which worked and echos the Up.

Yes this will work, because now you have a window specific binding
that fvwm uses.

> - - Is that a known bug?

No.

> - - How to do a mapping for everything except in mpv window?
> - - What is the difference between `-` and `--` in this context?

From the man page:

A '--' action indicates that the event should be propagated to
the specified window to handle.  This is only a valid action for
window-specific bindings.

So in conclusion, when using window specific bindings and you want to
propagate the press to the window you want to use '--', not '-' (which
tells fvwm to remove the binding).

Thus I think you should be able to get this to work if you change your
bindings to

Key Up          A       M       Scroll +0   -10
Key (mpv) Up A       M        --

jaimos