Dataengine Questions, Proposal?

[Aaron J. Seigo]

On Thursday 22 January 2009, David Baron wrote:
> On Thursday 22 January 2009 18:31:16 Aaron J. Seigo wrote:
> > On Thursday 22 January 2009, David Baron wrote:
> > > Register the applet with it/for it?
> >
> > applets don't register with the engine, really. they just ask for it:
> >
> > 	dataEngine("akonadi")
>
> So I say dataEngine("contacts") --or "kdepim". Is there such a thing
> working?

the engine is called akonadi. =)

> > you are guaranteed a valid engine in return. if an engine responding to
> > the name "akonadi" exists, you'll get that. if none exists, you'll get a
> > "dummy" engine. from there you can freely connect to sources, request
> > services, etc.
>
> What do I do with the "dummy" engine?

you don't need to care. it's just there so that if by some absurd occurance 
someone doesn't have an engine your widget expects to be there, you'll still 
get something that "works" back, but you'll get empty data for all your 
requests.

this prevents having to do error checking and other such repetitive nonesense 
in the widgets. by removing one less thing to remember you have to do, the 
robustness of the system increases.

so maybe just pretend i never told you that "dirty little secret" and hack as 
if the akonadi engine is just magically *always* there =)

> > we have a mouse movement engine, which is useful because that requires
> > polling the global mouse pointer. i'm not sure what the purpose of a keys
> > and mouse press engine would be though ....
>
> I mouse movement engine which yields Q...MouseEvent object of some kind
> should contain any mouse-buttons, coordinates, and hopefully or
> additionally the window or object currently owning the mouse (which should
> not be the applet).

the current mouse engine does coordinates only iirc. *fires up 
plasmaengineexplorer*  ... nope, it also does the cursor type. neat =)

but yeah, no mouse buttons or window-over information. 

-- 
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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