Stylus entered coordinates are wrong

[Preben S]

On XP r10305 and all versions since gtk was updated in may.

First set of coordinates are entered with a normal mouse, second set with the Wacom stylus:

    <path
       ...
       d="M 186.06633,473.62339 549.74144,337.0942"
       ...
    <path
       ...
       d="m 198.30732,-417084660 c -0.0197,0 361.77073,-140 361.61331,-140"
       ...

When the error occurs, the following console output appears.

(inkscape.exe:2844): GLib-GObject-WARNING **: invalid cast from `(null)' to `GdkWindow'

Sorry, I can't test with my Wacom mouse, it's broken.

[su_v (suv-lp)]

> First set of coordinates are entered with …

Which tool did you use to create the path? Is it limited to the calligraphy tool, or does it equally affect the pencil (freehand) and pen (bézier) tool?

[su_v (suv-lp)]

Possibly related issue reported in the forum (Wacom Bamboo, Windows XP):
<http://www.inkscapeforum.com/viewtopic.php?f=22&t=8588#p35546> et seq.

[Preben S (prsodk)]

The coordinates posted was made with the bezier tool, but the error appears with all tools.

[ScislaC (scislac)]

The only way to solve this is to have someone test from the current GTK version backwards to find one which works as expected (obviously jumping back a number of releases is acceptable to try and narrow things down quicker). However, I don't know that any developers have the time, motivation, or ability to do this. While I don't like the regression, I don't consider it a blocker compared to the security issue we're looking to get patched with newer GTK libs.

[Preben S (prsodk)]

On r 10568 (devlib r 24), this problem has disappeared.

I just tested for bug 284546 a few days ago and saw, that the problem with the calligraphic tool had disappeared.

As I made that test with the Wacom stylus, I also noticed that this bug had disappeared. I have no idea when this happened.

[su_v (suv-lp)]

Related or new duplicate:
Bug #845354 in Inkscape: “Critical Wacom tablet glitches (0.48.2)”
<https://bugs.launchpad.net/inkscape/+bug/845354>

[Juanitou (juanjunk)]

Hi!

Sorry about the stupid question, but I’m having exactly the same problem with a cheap tablet that I think derived from Wacom (Silvercrest, shown as Waltop by Inkscape). The coordinates are all wrongly interpreted. How could I test the ‘r 10568 (devlib r 24)’ above mentioned? I’ve not found it in this site.

Thanks in advance!

[Juanitou (juanjunk)]

As an addition to my comment, I’ve tried using both on Windows XP and 7 and the behaviour is the same, even worse on Windows 7, where the pointer freezes from time to time (but this seems to be a non-Inkscape problem).

[jazzynico (jazzynico)]

Some quite recent builds for Windows are available at http://www.oss-marketplace.com/index.php/downloads-mainmenu-63/Inkscape/Entwicklerversionen/.
Could you please confirm the bug is fixed with the dev version?

[Preben S (prsodk)]

Sorry, but i'm not able to test anything, as my computer (and my economy) is broken after the Bangkok flooding. It will take a while before my economy is recovered, so I can bye a computer again.

The water went a few cm higher then my computer could withstand, but there may be a chance it can be repaired, when I get time to look at it.

Sent from my Nokia phone
-----Original Message-----
From: JazzyNico
Sent: 11/02/2012, 22:59
To: <email address hidden>
Subject: [Bug 797519] Re: Stylus entered coordinates are wrong

Some quite recent builds for Windows are available at http://www.oss-marketplace.com/index.php/downloads-mainmenu-63/Inkscape/Entwicklerversionen/.
Could you please confirm the bug is fixed with the dev version?

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/797519

Title:
  Stylus entered coordinates are wrong

Status in Inkscape: A Vector Drawing Tool:
  New
Status in Inkscape Devlibs for Windows:
  New

Bug description:
  On XP r10305 and all versions since gtk was updated in may.

  First set of coordinates are entered with a normal mouse, second set
  with the Wacom stylus:

      <path
         ...
         d="M 186.06633,473.62339 549.74144,337.0942"
         ...
      <path
         ...
         d="m 198.30732,-417084660 c -0.0197,0 361.77073,-140 361.61331,-140"
         ...

  When the error occurs, the following console output appears.

  (inkscape.exe:2844): GLib-GObject-WARNING **: invalid cast from
  `(null)' to `GdkWindow'

  Sorry, I can't test with my Wacom mouse, it's broken.

To manage notifications about this bug go to:
https://bugs.launchpad.net/inkscape/+bug/797519/+subscriptions

[su_v (suv-lp)]

Setting bug status to 'Incomplete' - needs verification by the reporter based on a recent build which uses the updated Windows devlibs (newer GTK+ stack).

Similar (or same) issue is tracked in newer Bug #845354 (with fix confirmed after updating to newer version of GTK+).

[su_v (suv-lp)]

Closing - no confirmation on whether or not newer the update of the GTK+ stack in the devlibs solved the issue (as it did for bug #845354).