[Qt-qml] Doing it the declarative way: current phone-calls

[Sven Anderson]

Hi all,

for our phone application we try to build a UI based on QML. Therefore
I'm implementing an API for different phone properties and states. On of
it is the list of current phone calls, and I'm wondering how to do this
in the correct - speak: declarative - way.

First I found it a good idea to implement a QAbstractListModel for the
current calls and that works nicely with ListView. But now I realized,
that these models are tightly bound to the viewer, for instance the
sorting is done in the model and there seems to be not many ways to
interact with the model directly.

What I would need is a kind of a persistent model, independent of any
viewers, which for example I can also bind to condition of states. Like
the condition "if an item exists with property A set to value X", which
could, for instance, be used to trigger the ringer screen, if a ringing
call is added to the list. Of course I could add properties to the QALM
like "bool ringing" which is set true whenever there is a ringing call
in the list. But somehow I have the feeling this is going into the wrong
direction, and QALM is not the right choice here. Also I would like to
avoid something like a ringing-signal and similar things, because I fear
that this takes me away from the declarative concept.

So I would like to know by people more experienced than me in the
declarative thinking, how I can design such an API in a declarative way,
if this is possible at all.

Also you may point me to software that solved these kind of issues already.


Thanks a lot for your thoughts and best regards,

Sven

________________________________

  *   Join our Partner program: http://www.snom.com/partner<http://www.snom.com/partners>
  *   Subscribe to our snom support RSS Feed<http://wiki.snom.com/wiki/index.php?title=RSS&action=feed&feed=rss> and get first-hand technical news about snom products, e.g. Firmware updates, FAQ updates, troubleshooting hints, etc.

Follow us on Facebook<http://www.facebook.com/snom.VoIP.phones>, Twitter<http://twitter.com/snom>, YouTube<http://www.youtube.com/user/snomvoip>, Linkedin<http://www.linkedin.com/groups?gid=1773766>


Sitz/Domicile: Charlottenstr. 68-71, 10117 Berlin, Germany
Handelsregistereintrag/Register of Corporations entry: Berlin-Charlottenburg HRB 61842 B
Vorstand/Executive Board: Dr. Christian Stredicke, Dr. Michael Knieling, Alexander Khan
Vorsitzender des Aufsichtsrates/Chairman of the Supervisory Board: Stefan Friese

snom technology AG<http://www.snom.com>