I joined this list a long time ago when Dabo was first starting but
then left
because I stopped using Dabo, but now I'm taking another shot.
I'm having sort of the same problem I had before, which is that I can't
find
any information on how to set up simple GUI apps that DON'T require a database
or a large collection of "records", but just involve a set of GUI widgets that
interact with one another.
What I'm trying to do right now is create a small app that works sort
of like a
tiny spreadsheet. I want a few spinner boxes with numbers in them, and I want
to be able to twiddle the numbers and have some other text in the window update
based on some functions I specify, and maybe a few buttons and radio buttons
that I can hit to toggle between a few different behaviors.
I was pleased at how quickly I was able to set up a basic app by
copying from
the demo scripts, but I noticed a few things.
In simpleDemo2.py, I see that the slider's DataSource is set to the
Caption of
the label that displays the slider value. But this seems backwards to me ---
it
seems like what's really happening is the label is getting its Caption from the
slider value. Then I found out that I can do a DynamicCaption so it does
exactly that, but I'm curious what is going on with this setup in the demo.
At first I started thinking I could use a bunch of DynamicCaptions and
stuff to
get certain widgets to update based on the state of other widgets, but then I
thought that would get really unwieldy. If I understand correctly, this is
what
a bizObj is for --- to serve as a sort of manager for the data from various
widgets. What I'd like is to have an object (a bizObj?) that is linked to the
widgets, so that, for instance, the current value of my number spinner is
stored
in myObj.spinValue and the current value of some other caption in the window is
taken from myObj.getLabelText (which I can write as a method to manipulate the
spinner data and output the value I want). However, I can't find any
documentation that says "here is how you link a bizObj to a bunch GUI controls,
and here is how you set up some GUI controls to put their data into the bizObj
and others to take data out". All the bizObj stuff I see filled with database
references that I'm not interested in for this application.
So, how can I set up such a system?
Thanks,
--
--Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is no path,
and leave a trail."
--author unknown
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