slider_width - adjusting scrollbar sizes

[EMAN <eman2 agavesys com>]

Hi all:

Excuse me if this has been answered recently but I am a new subscriber 
to the list but did search the archives for the last 2 years.

I am upgrading some code from 1.2 to 2.6 and we run it without a window 
manager (a single x-window at a time)

and we need to adjust the size of the scroll bars (mostly so they can 
actually be used on our touch screen).

Under gtk+ 1.2 we were able to simply modify the base range class doing 
the following:

void SetHScrollBarSize( gint sliderWidth, gint stepperSize )
{
    GtkRangeClass *rClass;

    rClass = gtk_type_class ( gtk_hscrollbar_get_type() );
    rClass->slider_width = sliderWidth;
    rClass->stepper_size = stepperSize;
}

Now this will not compile under 2.6 because rClass no longer has a 
member called "slider_width".  I have tried getting to the data by using 
the privates GtkRangeLayout fields but to no avail.

Can someone please point me to the right way to do this.

Thanks,

Eric Hegstrom