linux-kernel - Re: [PATCH 2/2] eeepc-wmi: Add support for T101MT Home/Express Gate key

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Message-ID: <AANLkTinr2FJA2H3CJWx-wZ_g-hCZ3DT7PR6QsXqi5Rkw@mail.gmail.com>
Date:	Fri, 25 Mar 2011 15:43:11 +0000
From:	Corentin Chary <corentin.chary@...il.com>
To:	Chris Bagwell <chris@...bagwell.com>
Cc:	Matthew Garrett <mjg@...hat.com>,
	acpi4asus-user@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Seth Forshee <seth.forshee@...onical.com>
Subject: Re: [PATCH 2/2] eeepc-wmi: Add support for T101MT Home/Express Gate key

> Here is how I envision using these keys.  I wanted to map quick press
> to GNOME3/KDE4/Unity's Activities menu and map press-and-hold to
> script that rotates screen.  I like the repeating of rotates but I
> didn't really want a rotate to also force a pop up of the activities
> menu.

Makes sense.

>>
>>> And back to the question of KEY_HOME -- that's not really what you want,
>>> is it? As in "move cursor to start of line"?
>>
>> Ho .. right, that's what mean KEY_HOME :/. So no, I don't want that...
>> What about:
>> - KEY_CYCLEWINDOWS
>> - KEY_COMPUTER
>> - KEY_HOMEPAGE
>> - KEY_DASHBOARD
>>
>> I think KEY_HOMEPAGE is the best choice.
>
> I've only had limited time to look more.  So far, I found under udev a
> toshiba tablet that maps what is probably a rotate button to
> KEY_DIRECTION so thats one option for it instead of KEY_PROG2.  I
> couldn't find anybody using that though.
>
> I see in /usr/share/X11/symbols/inet:
>
>    key <I162>   {      [ XF86RotateWindows     ]       };
>
> and in /usr/share/X11/xkb/symbols/evdev:
>
> xkb/keycodes/evdev:     <I162> = 162;   // #define KEY_CYCLEWINDOWS        154
>
> Looks like KEY_CYCLEWINDOWS is already hooked up to
> gnome-settings-daemon to auto-rotate screen?

XF86RotateWindows is probably more "alt-tab" than "rotate screen".

> I ran into total dead end for finding a pre-existing example of home
> button usage.  I'm really surprised we do not yet have a KEY_LAUNCHER
> or similar because so many tablet PCs/smartphones/pads do have a
> button with this specific concept of "bring up your icon based
> application launcher".

KEY_LAUNCHER sounds like "Alt-F2" (that means krunner on KDE).
The advantage over KEY_HOMEPAGE is that it would work even when a
browser have the focus.

> - KEY_MENU
> - KEY_EXIT (smartphones sometime mean this)
> - KEY_PROG3 (basically all that Windows is doing)
> - KEY_LAUNCHER (why not be the first to finally create it!)
>
> I vote for either KEY_PROG3 or KEY_HOMEPAGE for at least short term.

So now, I vote (in order):
- KEY_LAUNCHER
- KEY_DASHBOARD
- KEY_PROG3

With this behavior (I'll use KEY_LAUCHER and KEY_PROG2)

- On press, do nothing
- On release, emit KEY_LAUNCHER if KEY_PROG2 wasn't emited
- On press, emit only one  KEY_PROG2 (I'd like to emit repeated
KEY_PROG2, but I understand that it makes things harder for
userspace).

-- 
Corentin Chary
http://xf.iksaif.net
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