From kde-panel-devel  Sun Jun 10 07:29:45 2007
From: "Aaron J. Seigo" <aseigo () kde ! org>
Date: Sun, 10 Jun 2007 07:29:45 +0000
To: kde-panel-devel
Subject: [Panel-devel] engines, animators, oh my
Message-Id: <200706100129.49509.aseigo () kde ! org>
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hey all...

thought i'd drop a note to bring people up to speed with where things are...

engines can now create items on demand, such as when an applet calls=20
connectSource, by reimplementing dataSourceRequested. what's really neat is=
=20
that data sources made in this manner also dissapear automagically when the=
=20
last listener is disconnected.

this takes care of one type of engine configuration need: what to display. =
use=20
cases:

 - which timezones to publish in TimeEngine (this is working already; check=
=20
out the clock applet's config =3D)
 - RSS feeds to grab

the other sort of configuration relates to configuring behaviour. use cases:

 - to update TimeEngine every second or just every minute
 - show only the last N articles in an RSS feed

i discussed with kevin today about how to go about this and we came up with=
=20
some ideas. i figure the configuration needs to be per-source and per-apple=
t,=20
with aggregation at each level (so the per-applet configs aggregated=20
per-source, and the per-source configs aggregated per-engine). the engine=20
will need to define some parameters for this aggregation (e.g. should a val=
ue=20
take the max or min setting?) ... i think i'm close to being ready to write=
=20
the code for this. i also think it sounds a bit more complex than it will=20
appear from the outside; in fact, the complexity is to hide as much from th=
e=20
outside as possible.

with that piece done, DataEngine should be ready for a TechBase tutorial.=20
yeah!

i've also got Animators, the plugins responsible for transition effects,=20
basically working. i have to finish instrumenting Corona to use all the=20
possible effects and to round out the set of effects, but this will happen=
=20
over time.

i really need someone to work on the default animator so that i'm not worki=
ng=20
with / around my own assumptions. i suppose i need to do some API docu firs=
t=20
there though ;)

mouse over frames for applets, panels and actually getting plasmagik merged=
=20
are up next.

=2D-=20
Aaron J. Seigo
humru othro a kohnu se
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

=46ull time KDE developer sponsored by Trolltech (http://www.trolltech.com)

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