Re: Upgrading deprecations

[Lionel Landwerlin <llandwerlin gmail com>]

On 13/05/13 10:36, phantomjinx wrote:
> Hi,
>
> I am trying to bring the coverflow CD animation in gtkpod up to version 1.12 by removing the
> deprecations.
>
> Having replaced ClutterBehaviour and ClutterAnimation with use of the easing state as described here
> [1], I have
> run into a problem.
>
> Clicking the right button scrolls the set of CD covers to the left and likewise clicking the left
> button scrolls to the right.
>
> With an easing duration of 1600ms, this works nicely except that the rotation is always clockwise
> whereas with ClutterBehaviour I was
> able to set it to counter-clockwise ensuring that a CD cover would rotate the shortest way around,
> rather than spinning needlessly.

You will have to implement this behavior yourself :(

> Secondly and more importantly, if I click the right button quickly, the animation may still be in
> the middle hence the covers end up out of
> position to the point that some even end up on the wrong side of the screen. I originally got around
> this by calling clutter_timeline_stop
> and clearing all clutter behaviours before starting a new animation. How would I achieve the same
> kind of thing with the easing state please?

When doing an implicit animation on an actor, you can get a 
ClutterTransition object (subclass of ClutterTimeline) by calling 
clutter_actor_get_transition() (might return NULL if no implicit 
animations are running). You can use the returned object to stop the 
implicit animation and trigger a new implicit animation.


> My attempts so far can be found here [2].
>
> Any help much appreciated.
>
> Thanks
>
> PGR
>
> [1] https://developer.gnome.org/clutter/stable/migrating-ClutterAnimation.html
> [2]
> https://gitorious.org/~phantomjinx/gtkpod/phantomjinx-gtkpod-plugin/blobs/updating-clarity/plugins/clarity/clarity_canvas.c