Re: scale problem

[Chris Roadfeldt <chris roadfeldt com>]

[croadfeldt kenny Gemu-0.8]$ gtk-config --version
1.2.10

[croadfeldt kenny croadfeldt]$ more test.c 
#include <glib.h>
#include <stdio.h>


void main ()
{
gfloat test = 2147483647;

printf("test: %f\n", test);

}
[croadfeldt kenny croadfeldt]$ ./test-gfloat 
test: 2147483648.000000

Problem found? Can someone explain this?

After doing some creative math. I have been able to force all my scales
to have a range of 0-100, precision is not that critical, so this small
range is fine. After doing this, everything works fine. I consider the
matter closed.

Chris

On Mon, 2002-02-18 at 09:07, Owen Taylor wrote:
> 
> Chris Roadfeldt <chris roadfeldt com> writes:
> 
> > Hello all,
> > 
> > 	I am having an annoying problem with a couple of scale widgets. The
> > code to create the scales is quite large, but it works. The core of the
> > problem is the scale allows a value 1 larger than the adjustment max.
> > The adjustment max I am setting is 2147483647, but when the scale is
> > moved to the max, it returns 2147483648 as the adjustment value. This
> > causes my app to do bad things. I can set the adjustment max to a lower
> > value, but this seems like a hack. I would rather fix the problem
> > itself. Does anyone have any ideas?
> 
> If this is with GTK+-1.2, the problem you are running into is  the
> limited precision of 'float' variables that store adjustment values.
> Your max value probably got rounded to the nearest representable value.
> 
> Regards,
>                                         Owen