krunner qml

[Aaron J. Seigo]

hi...

in order to have a workspace ready for libplasma2, everything needs to be done 
in qml. there has been at least one attempt to get krunner QML-ified, thanks to 
Aleix Pol, and possibly others.

a fair amount of internal work was really called for, though, to make it as 
nice as it could/shoudl be. just making it possible to load QML into krunner 
was not really enough.

so after having looked at other attempts (which was useful, so thanks for that 
work being done!), i started in on a refactoring of krunner. it's not done 
quite yet, but it's getting there. you can check it out in the aseigo/krunner-
qml branch of kde-workspace. don't expect it to do anything yet, though :)

currently it:

* loads Plasma::Packages of QML for UI
* provides a small API available from QML for the application to let the UI 
know of configuration changes, etc
* reduces the responsibilities of KRunnerDialog, leaving more to the QML

another important change is that i'm playing with the idea of having the 
switch user UI once again something different. krunner was simply re-using the 
Sessions runner for this. this was nice because it was less work, less code 
duplication, ensured consistency, etc.

with the move to QML, however, i'd like to see a purpose-designed UI for user 
switching. this should be harmonized with the DM, preferably by sharing QML (i 
doubt kdm will ever give us that; but we can at least work with lightdm), as 
well as the lock screen which also provides a subset of this behaviour.

if anyone wants to try their hand at doing some QML for the switch user UI, 
that'd be cool :)

i'm thinking of a modal, centered window ... perhaps a full screen width strip 
even? that shows all the existing sessions in a row to pick from and one entry 
to create a new session.

(super cool would be to allow entering the username and password inline to 
avoid having to call up the DM itself, but i doubt that's realistic.)

i hope to have the krunner QML stuff up and useful by sometime next week.

-- 
Aaron J. Seigo
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