Re: Changes in frame/window code

[Eli Zaretskii]

> Date: Wed, 20 Aug 2014 17:32:11 +0200
> From: martin rudalics <address@hidden>
> CC: address@hidden
> 
>  > I found the reason for this: w32_horizontal_scroll_bar_handle_click
>  > reported bogus (always -1) values in the Y part of '(X . Y)' member of
>  > the click event, when I drag the thumb.  That value is not used in L2R
>  > paragraphs, so L2R buffers were not affected.
> 
> I noticed the -1 but attributed it to the fact that I made the thumb
> larger by one and decided to take care of this later.  I wouldn't have
> suspected this to be the root of almost all evil and would probably have
> spent another week looking elsewhere.

The crucial finding was that set-window-hscroll is always called with
its NCOL argument set to zero, when I drag the thumb.  The rest was
very easy.