Re: [gtk-list] Re: "Endpoint" behavior of GtkVScale

[Jeremy Weatherford <xidus xidus net>]

I'm using

main_adj = gtk_adjustment_new(100,0,100,1,10,0);

That appears to be:

value =          100
lower =          0
upper =          100
step_increment = 1
page_increment = 10
page_size =      0

The scrollbar is less than 100 pixels in length, if that makes a 
difference.

Jeremy Weatherford
xidus@xidus.net
http://xidus.net/

On 26 Jan 2000, Owen Taylor wrote:

> 
> Jeremy Weatherford <xidus@xidus.net> writes:
> 
> > Hello,
> > 
> > I recently started using GTK, and have since built a mostly-complete
> > application with it quite easily.  I'm very happy with it, and I hope to
> > be able to contribute back to the project through documentation, if not
> > code.
> > 
> > I have some doubts about whether GtkVScale is working as well as it could
> > be at the moment, though.  When the 'thumb' is dragged all the way to the
> > top, the Adjustment reads the maximum (or minimum) value.  When it's
> > dragged all the way to the bottom, though, the Adjustment often does not
> > reach its minimum (or maximum) value.  I understand that this is because
> > of rounding, but I'm not sure this is the best behavior.
> > 
> > Especially when the scale is used to represent a value, the user
> > frequently (depending on the exact size and range of the scale and
> > and adjustment) cannot select the minimum value.  In my case, this is
> > especially problematic since I have a GtkVScale being used as a volume
> > control.  At the top, it reads 0, but at the bottom it'll read 98 or
> > something similar, meaning in my case that a given channel can't have its
> > volume turned all the way off.
> 
> The range of a range (scale/scrollbar) widget is
> 
>  lower <= value <= upper - page_size
> 
> This is what you expect for a scrollbar, but perhaps a bit suprising
> for a scale; try setting the page_size for the scale to zero.
> 
> Regards,
>                                         Owen
> 
> -- 
> To unsubscribe: mail -s unsubscribe gtk-list-request@redhat.com < /dev/null
>