Hello,

In the new Thinlet and SwiXml Titan Interview series I
will interview the movers and shakers of the Thinlet
and SwiXml world. To kick off the series let's all
welcome Kate Rhodes.

Q: Can you tell us a little bit about yourself?

Kate Rhodes: I'm a self-taught programmer, independent
software developer, serial entrepreneur, and an
occasional musician with a Japanese nickname. I love
to learn new things, solve new problems, and write
open source applications.

My most recent projects are Caterpillar and Aspirin. I
helped with some research and writing for Professional
Java Tools for Extreme Programming and I'm working on
a new book about Swing development with SwiXml.

Q: How did you stumble onto the Thinlet XUL toolkit?

Kate Rhodes: I was reading someone's blog and there
was this entry talking about this really cool tool
that converted XML to a GUI. It went on about how
small and fast it was. I went to the Thinlet site then
googled for more info and came across a whole slew of
blog entries from java developers who were similarly
enthusiastic about it. I think most of them were more
interested in the idea itself and hadn't actually used
it but I thought it was worth checking out so I
downloaded it and started playing around.

Q: How did you get started on Caterpillar?

Kate Rhodes: Well, there are a lot of great blogs out
there and actually going to the pages of all the ones
I like to keep an eye on was just not feasible. I had
been using Radio's aggregator a while before but I'd
stopped using Radio. All of the other aggregators out
there are essentially e-mail clients that check feeds
instead of mail servers. Either that or they're web
based. The web-based ones never had enough information
on a page and the e-mail clones always had too much.
It drove me nuts. I know people love some of these
clients but they never satisfied me. I wanted
something that didn't require me to visually parse
folders and figure out for myself which feeds had new
entries and which didn't. Neither did I want something
that took up the screen real estate that my browser
window did. I wanted something simple and small that
could just run in the background, be mostly covered by
other windows and yet still allow me to glance over at
it and see if there's something new.

When it came to actually writing it, I wasn't about to
deal with the horrors of traditional Swing coding and
the WYSIWYG Swing creation apps like NetBeans always
annoyed me because they had huge blocks of code that I
couldn't touch. God forbid someone without NetBeans
should try and edit it. If you did, you'd loose the
ability to ever edit it in the WYSIWYG again. So I
used Thinlet.

Q: Can you tell us some challenges you faced building
Caterpillar 1.0 using Thinlet?

Kate Rhodes: At the time, Thinlet was one
nine-thousand-line core class and another class that
extended java.awt.Frame. It wasn't even remotely
object oriented. You couldn't add a listener to
anything, dialog boxes could not move beyond the
bounds of the initial window, stuff like that. The
biggest problem of course was the lack of object
orientation. At Thinlet's core was an undocumented
multidimensional array that contained all the
properties of all the widgets you'd rendered from your
xml. So, there was no hope of ever adding a Listener
to something, or extending one of the widgets, or
anything like that. You got the features that were
provided and absolutely nothing more. I hear it's a
little better under the covers now but I haven't
really checked.

But it wasn't all that bad. Thinlet is, and was, an
excellent toolkit. It’s really simple to use, it has
almost all the widgets you could ever want, and as
long as you didn't need anything complex in your UI
you'd probably never be concerned about it's
limitations.

Q: Was Caterpillar your first Thinlet app? Can you
highlight some of your other apps built using Thinlet?

Kate Rhodes: I think Caterpillar was my first Thinlet
app. I've also written a simple ServerWatcher app that
watches a keeps an eye on your web servers to let you
know if they're down or not. While at Virage, I also
wrote an app that allowed developers to execute a
variety of commands against an XML gateway to a search
engine. It ended up being very useful and I started
adding more and more features until it eventually
started to become a little unmanageable with Thinlet.
By that time I'd encountered SwiXml so I rewrote it
with that.

Thanks Kate Rhodes. Check back next week for the
second  part of the XUL Titan interview with Kate
Rhodes discussing why Kate rewrote Caterpillar using
SwiXml and how SwiXml differs from Thinlet, what's her
take on adding scripting or CSS-like styling to
SwiXml, future plans for SwiXml and much much more. 


Full interview and links @
http://xul.sourceforge.net/post/2004/06/thinlet_xul_titan_interview_kate_rhodes_of_caterpillar_fame_part_i.html

  - Gerald

-------------------
Gerald Bauer

Thinlet Developers Group  |
http://groups.yahoo.com/group/thinlet
SwiXml Developers Group   |
http://groups.yahoo.com/group/swixml
JDNC Developers Group     | http://groups.yahoo.com/group/jdnc


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