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List:       fedora-list
Subject:    Re: Setting the active area of drawing tablet
From:       Paul Smith <phhs80 () gmail ! com>
Date:       2021-09-18 9:35:23
Message-ID: CALS=5mqNY8TS=7rtHCDz-PKk_u0d172MxMfL7b8Fu=7WNvYtTA () mail ! gmail ! com
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On Fri, Sep 17, 2021 at 11:45 AM Paul Smith <phhs80@gmail.com> wrote:
>
> > >>> While sliding the stylus horizontally from the left to the right, the
> > >>> screen cursor moves accordingly, but the right border of the screen is
> > >>> reached when the stylus is in the middle of the drawing tablet. Maybe,
> > >>> for some strange reason, my drawing tablet considers there are two
> > >>> screens and not a single one. How can we test that?
> > >>
> > >> The table knows nothing. :-)  It has a certain range of values and the
> > >> input layer takes that and the display size and should map the values
> > >> accordingly.  So something is going wrong and that's what I'm hoping to
> > >> find out with the hidviz program.
> > >
> > > Thanks, Samuel. When the stylus is on the middle of my drawing tablet,
> > >
> > > ABS-X = 30693 (approximately).
> >
> > What happens as you move further to the right?  Try moving slowly across
> > the middle.
>
> Thanks, Samuel. Please, see below.
>
> > > When the stylus is on the lower right corner, hidviz padding input shows
> > >
> > > X = 2 and Y=2.
> > >
> > >  From hiviz, I get yet the following:
> > >
> > > ----------------------------------
> > > Usage Page (Digitizer)
> > > Usage (Pen)
> > > Collection (Application)
> >
> > Is this the same section that you see active values in?  For my tablet,
> > the active values are in this section:
> > Usage Page (Generic Desktop)
> > Usage (Mouse)
> > Collection (Application)
> >    Report ID (9)
> >    Usage (Pointer)
> >    Collection (Physical)
> >
> > Do you have that section?  If so, what does it have in it?
>
> I have the following:
>
> -------------------------------------
> Usage Page (Generic Desktop)
> Usage (Mouse)
> Collection (Application)
>   Report ID (1)
>   Usage (Pointer)
>   Collection (Physical)
>     Usage Page (Button)
>     Usage Minimum (Button 1)
>     Usage Maximum (Button 5)
>     Logical minimum (0)
>     Logical maximum (1)
>     Report count (5)
>     Report size (1)
>     Item
>     Report count (1)
>     Report size (3)
>     Item
>     Usage Page (Generic Desktop)
>     Usage (X)
>     Usage (Y)
>     Logical minimum (-2047)
>     Logical maximum (2047)
>     Report size (12)
>     Report count (2)
>     Item
>     Usage (Wheel)
>     Logical minimum (-127)
>     Logical maximum (127)
>     Report size (8)
>     Report count (1)
>     Item
>     Usage Page (Consumer)
>     Usage (AC Flip Vertical)
>     Report count (1)
>     Item
>   End Collection
> End Collection
> -------------------------------------
> Event: time 1631875096.010113, type 3 (EV_ABS), code 0 (ABS_X), value 32767
> Event: time 1631875096.010113, type 3 (EV_ABS), code 1 (ABS_Y), value 22055
> Event: time 1631875096.010113, -------------- SYN_REPORT ------------
> Event: time 1631875096.110119, type 3 (EV_ABS), code 1 (ABS_Y), value 22037
> Event: time 1631875096.110119, -------------- SYN_REPORT ------------
> Event: time 1631875096.124127, type 3 (EV_ABS), code 1 (ABS_Y), value 22016
> Event: time 1631875096.124127, -------------- SYN_REPORT ------------
> Event: time 1631875096.136106, type 3 (EV_ABS), code 1 (ABS_Y), value 21999
> Event: time 1631875096.136106, -------------- SYN_REPORT ------------
> Event: time 1631875096.150107, type 3 (EV_ABS), code 1 (ABS_Y), value 21977
> Event: time 1631875096.150107, -------------- SYN_REPORT ------------
> [...]
> Event: time 1631875100.124584, -------------- SYN_REPORT ------------
> Event: time 1631875100.130573, type 3 (EV_ABS), code 1 (ABS_Y), value 21562
> Event: time 1631875100.130573, -------------- SYN_REPORT ------------
> Event: time 1631875100.136587, type 3 (EV_ABS), code 1 (ABS_Y), value 21570
> Event: time 1631875100.136587, -------------- SYN_REPORT ------------
> Event: time 1631875100.194589, type 3 (EV_ABS), code 1 (ABS_Y), value 21587

I have meanwhile filed a bug regarding this issue:

https://bugzilla.redhat.com/show_bug.cgi?id=2005575

Paul
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