Usability questions for Mandelbrot

[Benoit Jacob]

Hi,

I have a couple usability questions.
The Mandelbrot wallpaper has 2 modes: "locked" and "unlocked".
In locked mode, it behaves like an ordinary wallpaper. In unlocked
mode, the view can be moved by mouse d&d and mouse wheel.

Question 1.

In locked mode, should mouse wheel do nothing? Or should it have the
default effect which is, cycle through virtual desktops?
Argument in favor of doing nothing: prevents unwanted desktop cycling
if the user forgot that he had locked Mandelbrot.
Argument in favor of cycling through desktops: user might like this
feature, and that is also the behavior with ordinary wallpapers.

Question 2.

In unlocked mode, should the mouse pointer become a little hand (or
something like that) to indicate that the view can be dragged? Or
should we keep the default pointer?
Argument in favor of default pointer: it might be annoying to see that
little hand most of the time, since we're talking about a large
prominent element of the desktop.
Argument in favor of special pointer (like a hand): gives a clue that
dragging is possible (though it doesn't give a clue that zooming is
also possible).

Cheers,
Benoit