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bug#32002: 24.4; Scroll bar start, end not correct

From: Robert Pluim
Subject: bug#32002: 24.4; Scroll bar start, end not correct
Date: Fri, 06 Jul 2018 12:32:04 +0200

Eli Zaretskii <address@hidden> writes:

>> From: Mike Kupfer <address@hidden>
>> cc: address@hidden, address@hidden, address@hidden
>> Date: Thu, 05 Jul 2018 20:58:38 -0700
>> 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.


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