Re: FVWM: emulating mouse button 2 on HP touchpad

On Mon, 15 May 2023, Lucio Chiappetti wrote:

> I'll be reading the libinput synaptics and synclient manpages.

I've done this exercise and some tests

> ELAN076D: 00 04F3:3244 Mouse               id=10   [slave  pointer  (2)]
> ELAN076D: 00 04F3:3244 Touchpad            id=11   [slave  pointer  (2)]
>
> (not sure why it reports twice the same device as touchpad and mouse, there 
> is no physical mouse attached)

I've no idea, I suppose they are both loaded in case a mouse is attached.

>>  Synaptics driver and libinput (probably the correct, "modern" option).
>
> If I do xinput --list-props  for device 11 (touchpad) it returns Synaptics 
> and for device 10 (Mouse) it returns libinput.

So I am assuming I have to use synclient to get my status.

> The current one has just the touchpad, but the lower part of it is 
> "depressable".

I believe this is what is technically called a "clickpad".

The synaptics man page says that in principle one could set 
EmulateMidButtonTime to non-zero to do MB2 with simultaneous MB1-MB3 (as I 
was used on the old touchpad-with-buttons) but ClickPads do not support 
middle mouse button emulation ... so I gabe up on that.

However looking at the synclient output I discovered parameters

     RTCornerButton          = 2
     RBCornerButton          = 3
     LTCornerButton          = 0
     LBCornerButton          = 0

so this mean that TAPPING (not pressing-releasing as for the lower area) 
in the right-top corner of the touchpad is MB2.

Since I found somehmoiw difficult to locate the exact area of such 
corner, and the tap somehow "hard" I decided to ...

... simply SWAP the actions for MB2 and MB3 with

xinput set-button-map 11 1 3 2 4 5 6 7 8 9 10 11 12

This way I can click in the lower right corner to do MB2 (which I use 
often in any window to do quick paste, and more seldom in the root window 
to call IconMan), while I tap in the upper right corner to do MB3 (which I 
use seldom, I can think only of a browser window to get a context 
dependent menu)

I'll keep this along with PointerKey assignment to right-control (which 
works except in xterms). If I'm satisfied I'll make it permanent.

Thanks in oarticular to Mandar Mitra for addressing me to synaptics and 
xinput.

-- 
Lucio Chiappetti