Only one stroken input possibel

[GoogleCodeExporter]

I use Ubuntu 9.10 with CellWriter 1.3.4-1 (tried Ubuntu and official
Version, same issue)

I can not write two ore more stroken, after the first line it trys to
recognize the letter... I'm not able to write a "t" or a "4".

It worked with Ubuntu 9.04. Im not sure if its an Ubuntu or CellWriter
problem...

If you need more information ask...

Thanks!

Original issue reported on code.google.com by andreasb...@gmail.com on 14 Jan 2010 at 10:17

[GoogleCodeExporter]

I've had the same problem, and I think it is related to whether or not you have
enabled extended input events. Also see:

https://bugs.launchpad.net/ubuntu/+source/cellwriter/+bug/290159

Original comment by Karl.Heg...@gmail.com on 8 Feb 2010 at 2:01

[GoogleCodeExporter]

See a possible workaround in issue 28. In my case, this sort of problem seemed 
to be
caused by the introduction of windowless controls in GTK+, but compiling with 
GNOME
solved it for the reporter of issue 28.

Original comment by bielaws...@gmail.com on 9 Feb 2010 at 5:47

[GoogleCodeExporter]

I get this problem with Archlinux.  Setting the GDK_NATIVE_WINDOWS env var 
doesn't help.

What actually happens is that you can do one stroke, and release the pen/mouse 
button, and the stroke will not be cleared (unless you leave the box, of 
course).  However, as soon as you press down for the second stroke, it clears 
the first one.

Original comment by goo...@randomguy3.me.uk on 13 Jul 2010 at 2:25

[GoogleCodeExporter]

Tell a lie - setting GDK_NATIVE_WINDOWS does fix it.  I just hadn't quit 
CellWriter properly before trying it.

Original comment by goo...@randomguy3.me.uk on 13 Jul 2010 at 2:28

[GoogleCodeExporter]

Bizarrely, if I compile with Gnome support, multi-stroke input works in normal 
mode, but not training mode.

Original comment by goo...@randomguy3.me.uk on 13 Jul 2010 at 2:30

[GoogleCodeExporter]

Well, a bit of debugging shows that if GDK_NATIVE_WINDOWS is set, when I press 
down with the stylus, I get a leave_notify_event with the mode set to 
GDK_CROSSING_GRAB.  This is ignored by cellwidget.c.

However, without GDK_NATIVE_WINDOWS set, the leave_notify_event has mode 
GDK_CROSSING_NORMAL.  No idea why yet.

Original comment by goo...@randomguy3.me.uk on 13 Jul 2010 at 5:22

[GoogleCodeExporter]

So, the spurious leave_notify event is triggered because accept_focus is set to 
false on the window.  This may well only happen with KWin - I haven't tried any 
other window managers with my minimal test app.

The fact that it works with GTK_NATIVE_WINDOWS enabled (or GTK+ before 2.18.0) 
appears to be a useful quirk of the cellwriter code.  My minimal test app 
(which has a gtk_drawing_area inside a window that outputs some debugging info 
when it gets a leave_notify event) always produces GDK_CROSSING_NORMAL events 
regardless of environment variables or anything else I've tried.

Note that simply calling gdk_window_ensure_native on the GdkWindow associated 
with the cell_widget drawing_area is not sufficient (I tried calling 
gdk_window_ensure_native(gtk_widget_get_window(widget)); in a realize event 
handler).  But GDK_NATIVE_WINDOWS apparently also changes some other behaviour, 
according to 
http://library.gnome.org/devel/gtk/2.18/gtk-migrating-ClientSideWindows.html.

Original comment by goo...@randomguy3.me.uk on 13 Jul 2010 at 10:12

[GoogleCodeExporter]

I can confirm that the XFCE4 window manager, as an example, doesn't produce 
this behaviour.

Attached is a little test app.

Original comment by goo...@randomguy3.me.uk on 14 Jul 2010 at 2:04

Attachments:

• main.c

[GoogleCodeExporter]

KWin bug filed (asking for more info): 
http://bugs.kde.org/show_bug.cgi?id=244625

Original comment by goo...@randomguy3.me.uk on 14 Jul 2010 at 4:25

[GoogleCodeExporter]

Hi guys, sorry for letting this sit for so long. I will take a look at it over 
the weekend. --risujin

Original comment by mele...@google.com on 31 Jul 2010 at 4:16

• Changed state: Accepted
• Added labels: For-1.3, Priority-Critical, Type-Bug
• Removed labels: Priority-Mediumxx, Type-Defect

[GoogleCodeExporter]

I am running Kubuntu 11.04, and can confirm that launching with: 
GDK_NATIVE_WINDOWS=1 cellwriter
fixed the single stroke problem for me also. Thank you so much. Is there a way 
to make this happen by default for cellwriter. I don't mean mine, I mean the 
program. 

Original comment by SuperSma...@gmail.com on 28 May 2011 at 7:35

[GoogleCodeExporter]

Running cellwriter 1.3.4 on Ubuntu 11.04 x64 (Gnome classic) also seems to 
produce this problem.

GDK_NATIVE_WINDOWS=1 cellwriter does appear to fix it, but this seems 
temporary.  Any solution?

Original comment by Zachary....@gmail.com on 3 Jul 2011 at 3:59

[GoogleCodeExporter]

still having this issue with 1.3.4 in ubuntu 11.04. any potential permanent 
fixes?

Original comment by walil...@gmail.com on 29 Sep 2011 at 5:08

[GoogleCodeExporter]

Finally tested this with a Wacom tablet on a recent version of Ubuntu. It is 
firing "leave_notify_event" like crazy, just removed that code and seems to 
work well now.

Original comment by mele...@google.com on 8 Oct 2011 at 6:31

• Changed state: Fixed