[Kde-accessibility] Mouse Scaling in KWin's Zoom Effecdt

[Robert Cole]

Thanks for the reply, Sebastian.

That is good information to know. The Zoom effect indeed is very nice. 
As a blind user, I am really looking forward to seeing what the future 
holds for accessibility in Linux desktops. I am simply astounded at how 
far accessibility has come since I started using Linux in 2006.

Thanks for all of the hard work. It really is appreciated!

Take care.

On 11/29/2011 09:23 PM, Sebastian Sauer wrote:
> Jeremy Whiting wrote:
>
> > On Wed, Nov 16, 2011 at 5:24 PM, Robert Cole <rkcole72984 at gmail.com>
>
> > wrote:
>
> >> Hello, everyone.
>
> >>
>
> >> I am testing out openSUSE 12.1 in a virtual machine using VirtualBox
>
> >> today. I decided to test out the Zoom effect of KWin to see how it
>
> >> worked, as it is quite jumpy on my primary Linux Mint 11 machine. I was
>
> >> amazed at how smooth the screen panned around while it was zoomed, and
>
> >> this being in a virtual machine! My main reason for writing this 
> message,
>
> >> however, is that I found that the mouse pointer does not scale (at least
>
> >> in the virtual machine) when zoomed in.
>
> >
>
> > Interesting. I haven't played with the kwin zoom effect til today.
>
> > It's quite nice indeed.
>
>
> Thanks :-)
>
>
> > I tried on my real machine, and the cursor
>
> > did scale, but I noticed it changed style.
>
>
> The reason for this is that it's not the real mouse-pointer that is 
> displayed. What we do is to hide the real mouse-pointer and then draw 
> our own which is 1) optionally proper scaled to match the zoom-level 
> and, even more important, 2) the position is adjusted to match to what 
> is displayed at the screen. What is displayed at the screen is more or 
> less a fake and not what X.org sees. So, the real mouse-position, 
> which is controlled by X.org, would be displayed at a position that 
> does not match to what is displayed. That is why we need to hide + 
> draw our own and for that we are loading the cursor-theme. When that 
> does not match to what was displayed before then no cursor-theme was 
> set in which case we would need to fallback to the X.org default what 
> we atm don't do.
>
>
> So much for the background :-)
>
>
>
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