On Wed, 25 Jun 2003, Marc Aurele La France wrote:
> On Mon, 23 Jun 2003, Maxime Labelle wrote:
>
> > I was wondering if it is possible (and I know it is..) to hack the XFree86
> > code to make the virtual screen follow the mouse's cursor as if the screen's
> > window mouvement was linked to the centered cursor. By that I mean that if I
> > move the cursor, the whole zoomed section of the screen moves with the
> > cursor. Then if the cursor reach a certain percentage of the zoomed screen'
> > width and height it stops being linked so it becomes possible to move the
> > cursor freely again..
>
> > The purpose of this is for a friend of mine who has 30% of his vision and is
> > using UNIX. He needs his screen to be in very low resolution for him to see
> > things clearly.
>
> > I am just asking a evaluation of how hard and how long might it takes to do
> > such a job onto the XFree86 source code. I will do such modifications myself
> > but I was hoping for you to give me a hand to publish the code and expose it
> > on xfree.org to promote and help people with vision problems..
>
> Something like this shouldn't be too hard.
>
> In xc/programs/Xserver/hw/xfree86/common/xf86Cursor.c in the sources,
> you'll find the functions xf86InitViewport(), xf86PointerMoved() and
> xf86SwitchMode(). These could be generalised to factor in a configurable
> percentage of the physical resolution whose edges the pointer's
> hot-spot needs to stay away from.
>
> Marc.
Yes, shouldn't be difficult. If the factor were global and defaulted
to 100% we'd have the same behavior as we currently do. A commandline
option could change the percentage. Provided the implementation was
clean, we should be able to make that part of the standard server.
Mark.
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