[maemo-developers] Live Backgrounds in PR1.2 hildon-desktop

[From: Kamen Bundev]

One can probably use Vala if such VAPIs are available.

Bundyo

2010/6/1 Kimmo Hämäläinen <kimmo.hamalainen at nokia.com>

> On Tue, 2010-06-01 at 10:41 +0200, ext Sivan Greenberg wrote:
> > That is very cool Kimmo!
> >
> > I have a life improving app use case for that, I'll be sure to check
> > you examples.
> >
> > The manager has to be written in C/GTK or can be eased off in PyGtk ?
>
> I think the Control Panel plugin API is C/GTK only since the plugin runs
> inside the Control Panel application.  You'd need to be somehow familiar
> with X11 programming, since it would involve finding out the current
> live backgrounds and offer UI for manipulating the window property on
> them.  Actually it's possible to put any application as the live
> background, and it could even work if the application only depends on
> ButtonPress, ButtonRelease and Motion events (which are forwarded by
> hildon-desktop to the live background window).
>
> -Kimmo
>
> >
> > Sivan
> >
> > 2010/6/1 Kimmo Hämäläinen <kimmo.hamalainen at nokia.com>:
> > > Hello!
> > >
> > > The PR1.2 has a super-secret, unplanned feature that we smuggled in:
> > > so-called "live backgrounds" support in hildon-desktop (>=
> 1:2.2.133-1).
> > > Live background is a window that is displayed below or front of the
> Home
> > > applets, either in a specific desktop view (panning with the view) or
> as
> > > common for all views (static).
> > >
> > > Live background window is recognised when an integer-valued
> > > _HILDON_LIVE_DESKTOP_BACKGROUND window property is found in the window:
> > >
> > > 0        this client is not a live background
> > > 1-4      home view specific live background
> > > 101-104  home view specific live foreground (above applets)
> > > -1       global live background used for all home views
> > > -101     global live foreground used for all home views
> > >
> > > Notice that you probably want to use a transparent window for "live
> > > foregrounds" so that the applets and the background image are still
> > > visible.  What you also "want" (I tell you) is to pause the animation
> of
> > > the background when it's not visible.  I have ported xsnow for
> > > demonstrating how to do the pausing and detect positions of the Home
> > > applets, the xsnow patch (against xsnow 1:1.42-8) is attached (I'm also
> > > trying to create a Garage project for it). The xsnow pausing is not
> > > optimal (it periodically wakes up to check sysfs for the display
> > > brightness), but it has not eaten all my battery even if I let it run
> > > overnight.
> > >
> > > Someone could write a Control Panel plugin for managing live
> backgrounds
> > > (these window properties), since there is no tool as yet.
> > >
> > > There is a basic code example / test program here:
> > >
> http://maemo.gitorious.org/fremantle-hildon-desktop/hildon-desktop/blobs/master/tests/test-live-bg.c
> > >
> > > -Kimmo
> > >
> > >
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> > >
> > >
>
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