RE: ClutterTransitionGroup scripting

[Dave Craig <dcraig brightsign biz>]

Hi Emmanuele,

Thanks for clearing that up - I'll file bugs and figure out a patch,

Dave

-----Original Message-----
From: Emmanuele Bassi [mailto:ebassi gmail com] 
Sent: 06 December 2013 11:10
To: Dave Craig
Cc: clutter-list gnome org
Subject: Re: ClutterTransitionGroup scripting

hi;

On 6 December 2013 10:57, Dave Craig <dcraig brightsign biz> wrote:
> > ClutterTransitionGroup does not implement the Scriptable interface
> Oh, the documentation says it does :-(

> "ClutterTransitionGroup implements ClutterScriptable."
> https://developer.gnome.org/clutter/stable/ClutterTransitionGroup.html

that's because ClutterTransitionGroup is-a ClutterTransition, which implements ClutterScriptable, but it does 
not override ClutterScriptable itself to implement its custom keys.

> In fact I think that part of the JSON appears to work as I can load the script and get the 
> ClutterTransitionGroup from it.

that is purely the result of ClutterTransition being a GObject:
ClutterScript can generate any GObject class.

> However, the adding of frames to ClutterKeyframeTransition JSON is less clear to me.

that's half the part that is missing: ClutterKeyframeTransition does not define its own keys, and 
ClutterTransitionGroup does not allow adding ClutterTransitions through ClutterScript.

in short:

 * ClutterKeyframeTransition needs to add code to parse keyframes from ClutterScript definitions, using a 
syntax to be defined
 * ClutterTransitionGroup needs to add code to parse a list of ClutterTransition definitions and add them to 
its list of managed transitions, using a syntax to be defined

both are valid issues that should be filed in the bug tracking system, and patches would be very much welcome.

ciao,
 Emmanuele.

> -----Original Message-----
> From: Emmanuele Bassi [mailto:ebassi gmail com]
> Sent: 06 December 2013 10:44
> To: Dave Craig
> Cc: clutter-list gnome org
> Subject: Re: ClutterTransitionGroup scripting
>
> hi;
>
> ClutterTransitionGroup does not implement the Scriptable interface, so there is no syntax for creating 
> transition groups from ClutterScript.
>
> you should open a bug about it on bugzilla.gnome.org, product 'clutter'. I can also assist you in writing a 
> patch for it, if you want. just drop by in the #clutter IRC channel on irc.gnome.org.
>
> ciao,
>  Emmanuele.
>
>
> On 6 December 2013 10:26, Dave Craig <dcraig brightsign biz> wrote:
> > Hi
> >
> > In my program I have a clutter actor to which I'd like to apply a varierty of scripted transition. What 
> > I'm looking for is an example of some clutter script JSON showing some transitions grouped inside a 
> > ClutterTransitionGroup. My current JSON looks like this:
> >
> > {
> >   "id"                  : "ShowTransition",
> >   "type"                : "ClutterTransitionGroup",
> >   "remove-on-complete"  : true,
> >   "duration"            : 1000,
> >   "group"               : [
> >                             {
> >                                 "id"            : "ShowOpacity",
> >                                 "type"          : "ClutterKeyframeTransition",
> >                                 "property-name" : "opacity",
> >                                 "keys" : [
> >                                            [ 1.0, 255, "easeInCubic" ]
> >                                          ]
> >                             }
> >                           ]
> > }
> >
> > From looking at the source code, I don't think 'keys' is supported in 
> > the same way as in ClutterAnimator which is why this script parses, 
> > but doesn't have any effect. Can anyone point me in the direction of 
> > the correct syntax please,
> >
> > Thanks,
> >
> > Dave Craig.
> > _______________________________________________
> > clutter-list mailing list
> > clutter-list gnome org
> > https://mail.gnome.org/mailman/listinfo/clutter-list
>
>
>
> --
> W: http://www.emmanuelebassi.name
> B: http://blogs.gnome.org/ebassi/
> _______________________________________________
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