Drawing area question

[Peter Schoefer <ps snafu de>]

Hello,

I am writing a tool for Dynamical Systems visualization, similar to DSTool
(from
ftp://macomb.cam.cornell.edu/pub/dstool/Version_tk/dstool_tk.tar.gz).

One of my problems comes from the limitation of the adjustment widget to
floats. This restricts all input widgets which are based on adjustments
(sliders, spinbuttons, ...) to 6 digits precision, which make them
unusable 
for many tasks where small perturbations of given numbers (one basic        
question in numerical data analysis) are envolved.

So a suggestion/wish:
Changing adjustments and some derived widgets to double would increase
the usefulness without breaking too much code (as far as I can see).

My second problem has to do with the DrawingArea widget. I wrote a simple    
mouse controled rubberbox for zooming which works without problems.
I addition I want to do some fine positioning of the box with the cursor
keys
(as in xv), but I can't get any key_press_events from the drawing area and  
can't figure out whats the reason. Maybe someone can give me some hints
how to
deal with this problem.

Thanx in advance

Peter Schoefer <ps@snafu.de>