GNU bug report logs - #32002
24.4; Scroll bar start, end not correct

Previous Next

Full log

Message #103 received at 32002 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: martin rudalics <rudalics <at> gmx.at>
Cc: npostavs <at> gmail.com, rpluim <at> gmail.com, 32002 <at> debbugs.gnu.org, kurn <at> sfu.ca,
 mkupfer <at> alum.berkeley.edu
Subject: Re: bug#32002: 24.4; Scroll bar start, end not correct
Date: Fri, 06 Jul 2018 16:31:05 +0300

> Date: Fri, 06 Jul 2018 14:56:10 +0200
> From: martin rudalics <rudalics <at> gmx.at>
> CC: Mike Kupfer <mkupfer <at> alum.berkeley.edu>, 32002 <at> debbugs.gnu.org, 
>  kurn <at> sfu.ca, npostavs <at> gmail.com
> 
>  >>> gdb says that Emacs is getting jump events, not step events.
>  >>>
>  >>>    Thread 1 "emacs" hit Breakpoint 1, xg_scroll_callback (range=0x2f58740,
>  >>>        scroll=GTK_SCROLL_JUMP, value=5637316.2000000002,
>  >>>        user_data=0x1493c30 <bss_sbrk_buffer+8990864>) at xterm.c:5644
>  >>
>  >> Thanks.  I guess the issue now moves to GTK-land: why do we get jump
>  >> events when you click on the steppers?  Maybe someone who knows GTK
>  >> can answer that.
>  >
>  > It looks like GTK sends GTK_SCROLL_JUMP everytime the position of the
>  > scrollbar thumb is changed, regardless of how you change it. I think
>  > it can *also* send events when you click the stepper, but I suspect
>  > you then get two events, with no easy way to distinguish them. Iʼd
>  > test, but my theme doesnʼt have steppers.
> 
> Here I'm called back with exactly one GTK_SCROLL_STEP notification as
> 
> #0  xg_scroll_callback (range=0x183a3b0, scroll=GTK_SCROLL_STEP_FORWARD, value=244073, user_data=0x15410a0) at ../../src/xterm.c:5673

So maybe the GTK version is a factor here?

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.