Re: capi scrolling & scroll-bars

Hi Paul,

None of your code examples made it through… 

But rather that trying to use a scrollbar, how about a Slider? You can have it return integer values from 0 to your count of albums for use as a selection index.

- DM

> On Jan 6, 2026, at 12:09, Paul Werkowski (as pw at snoopy dot qozzy dot com) <[email protected]> wrote:
> 
> i have built a CAPI GUI for my collection of digital audio albums which includes ripped CDs, digitized LPs and downloads from HDTracks.com. There are 151 albums at this time. The visual appearance is similar to the old Windows Media Player. I have an 800 by 800 pixel visible window with album cover images of size 100 x 100 pixels in cells of 144x144 pixels, laid out alphabetically by album names, in rows of from one to five cells (44 rows) . These images are drawn on a Tracking-Pinboard-Layout output-pane.
> 
> As currently implemented, the drawing pane has no visible scroll-bars but does scroll nicely via rotation of the mouse wheel. The issue is that accessing an album with a name starting at the end of the alphabet, such as "Voices", requires a lot of wheel spinning.
> 
> So, I wish add a visible scroll-bar (maybe with a button to turn it on/off) but no can do.
> 
> Below are two functions. Run-test is similar to my app's (show-albums) minus all the app specific stuff. Run-example is similar to the example found in Lispworks User Guide and Reference Manual 12.4.1.
> 
> (run-example) produces a window with a vertical scroll bar while (run-test) does not. I have read and re-read everything I can find in the UG about scrolling but maybe I've missed something relevant?
> 
> Puzzled,
> Paul
> 
> _______________________________________________
> Lisp Hug - the mailing list for LispWorks users
> [email protected]
> http://www.lispworks.com/support/lisp-hug.html


_______________________________________________
Lisp Hug - the mailing list for LispWorks users
[email protected]
http://www.lispworks.com/support/lisp-hug.html