Re: [Xournal-devel] Xournal on touchscreen laptops - questions

[Denis A. <au...@ma...>]

See e.g.
http://ubuntuforums.org/showthread.php?t=2193327
about halfway down, search for "# Deactivate touchscreen when wacom pen 
is in proximity"
You'll need to adjust the device names ("Wacom ISDv4 ...", "ELAN 
Touchscreen") to the ones you need for your system.
I haven't tested this one myself (I don't use that feature), but it 
looks similar to most I've seen.
Best,
Denis


On 12/24/2014 11:50 AM, Leo Alekseyev wrote:
> Denis, can you point me to the scripts that you mentioned, the ones that
> disable touch when pen is in proximity?  Multitouch really gets in the
> way of inking in Unity.
>
> On Fri, Dec 12, 2014 at 11:40 PM, Denis Auroux <au...@ma...
> <mailto:au...@ma...>> wrote:
>
>     On 12/13/2014 02:04 AM, Leo Alekseyev wrote:
>
>         I recently got around to installing Ubuntu on the original Microsoft
>         Surface Pro.  It's a nice piece of hardware, with the proviso
>         that the
>         kernel wifi drivers are flaky and it's easiest to use an
>         external USB
>         dongle.  Touch functionality, however, makes Xournal hard to use
>         for 2
>         reasons: (1) Xournal responds to touch input by putting dots on
>         canvas.
>         Worse, Xournal is trying to connect the touch point from my palm
>         to the
>         input from the stylus, resulting in weird spurious lines.
>
>
>     Can you give the output of "xinput list" ?
>
>     Assuming you're using xournal 0.4.8 (or the current git, not very
>     different) (if not, you should -- 0.4.8 has many important
>     touchscreen fixes in it), did you specify the touchscreen device
>     under Options -> Pen and Touch -> Designate as Touchscreen, and try
>     turning on options like "Touchscreen as hand tool" and "Pen disables
>     touch" ?
>
>     There might still be some bugs, but at least the sort of behavior
>     shouldn't happen if there are distinct devices for the pen and the
>     touchscreen and the touchscreen device is
>
>     If there aren't different xinput devices for pen vs. touch, then
>     you're essentially out of luck as far as using the pen properly in
>     Linux goes.
>
>         (2) Resting
>         palm on the screen triggers Unity 3- or 4-finger multi-touch
>         gestures,
>         which either open the Unity HUD menu, or bring up drag handles
>         on the
>         window.  That's also pretty annoying and interferes with trying
>         to ink.
>
>
>     I don't know anything about Unity, but short of disabling the
>     multi-touch gestures altogether in the Unity settings I don't think
>     you can expect anything better.  If all else fails, it's a big
>     hammer but you can always run
>
>     xinput disable "name of touchscreen device"
>
>     before running xournal. Some people wrote scripts that automatically
>     run this (or conversely enable) every second depending on whether
>     the wacom pen is in proximity or not, but I'm not a big fan (but
>     then I don't have that annoying Unity problem since I use gnome).
>
>         Has anyone looked into what it might take to make Xournal ignore
>         touch
>         input
>
>
>     If xinput reports a separate input device for the pen, get 0.4.8 and
>     set up the options under Pen and Touch as works best for you.
>     If you don't have a separate input device for the pen, you're out of
>     luck, xournal has no way of telling your pen from your hand.
>
>     Hope this helps,
>     Denis
>
>     --
>     Denis Auroux
>     UC Berkeley, Department of Mathematics au...@ma...
>     <mailto:au...@ma...>
>     Institut Henri Poincare, Paris au...@ih... <mailto:au...@ih...>
>

-- 
Denis Auroux
UC Berkeley, Department of Mathematics     au...@ma... 

Institut Henri Poincare, Paris             au...@ih...