getting started with plasmoid development

[Aaron J. Seigo]

On Wednesday 17 December 2008, D. R. Evans wrote:
> Aaron J. Seigo said the following at 12/15/2008 03:42 PM :
> > so, the "Plasma Way" to do this would be to create a DataEngine that
> > handles the NOAA part. it would download and parse the data for the
> > Applet. the Applet would connect to it by doing something like (assuming
> > you called your dataengine "noaa", probably a better name for it ;):
> >
> >
> >
> > in the Applet part, for plotting we have Plasma::SignalPlotter ... it's a
> > bit of a beast, but rather powerful.
> >
> > you'd make a dataUpdated(const QString &sourceName, const
> > Plasma::DataEngine::Data &data) method in your applet (or whatever you
> > connect the source to) .. sourceName would be "solarflux" in this
> > example, and the data would contain whatever the engine sends your way.
> >
> > the updateInterval, engine loading, etc is all handled automagically for
> > you.
>
> Where is there some documentation for SignalPlotter (the python version;
> I've decided that python is the way to go for this simple plasmoid)?

i'm sure Simon Edwards will be please to hear that =))

> I have
> a draft of the DataEngine written (doubtless with bugs, but I understand
> the principle so it's basically just debugging that's needed). I couldn't

cool

> find an example of a python plasmoid that uses a SignalPlotter the way that
> I could for the DataEngine, though, so I have nothing to steal and no
> documentation to get an understanding of what SignalPlotter does and how to

ah, it's just a graph ... basically, you call addPlot for each line you'd like 
it to graph; then you call addSample whenever the data updates =)

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

KDE core developer sponsored by Qt Software

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