Re: [Vala] Status of clutter bindings

[Frederik <scumm_fredo gmx net>]

Spencer, Matthew wrote:
> Hi Guys
>  
> Not sure if this should be posted here or to the clutter lists, but I'll
> try here first :)
>  
> I am trying to create a clutter app using vala and am having a few
> issues.  The biggest one seems to be with the clutter-json bindings.
> How mature are these supposed to be, because the simplest application is
> failing to compile, and looking at the vapi files I would have to agree.
>  
> I would like to modify the generated vapi files to make this work,
> however at the top is an 'autogenerated' warning, but I cannot find
> anywhere in the vala build that will allow me to recreate these bindings
> (there also seems to be nothing in the 1.0.8 source release of clutter).

Yes, it seems that 'clutter-1.0.vapi' was accidentally included without
the metadata information an in a very raw state without any tweaking.

Ali Sabil (asabil) has started a launchpad project as a new beginning for
Clutter bindings, this time with metadata:
http://bazaar.launchpad.net/~asabil/+junk/clutter-vala-1.0/files

At the same time I was assembling a patch with lots of fixes for the raw
'clutter-1.0.vapi' without knowing about his project:
https://bugzilla.gnome.org/show_bug.cgi?id=598778

What needs to be done now is to merge this patch into his project, but in
the form of metadata. I wanted to do that but I didn't find enough time
during the last weeks. Of course, any help is appreciated.

I have attached a Vala port of a little demo program that would work with
my patch.


Best regards,

Frederik

using Clutter;

class ClutterDemo {

        private Stage stage;
        private Rectangle[] rectangles;

        const string[] colors = {
                "blanched almond",
                "OldLace",
                "MistyRose",
                "White",
                "LavenderBlush",
                "CornflowerBlue",
                "chartreuse",
                "chocolate",
                "light coral",
                "medium violet red",
                "LemonChiffon2",
                "RosyBrown3"
        };

        public ClutterDemo () {
                stage = Stage.get_default ();

                rectangles = new Rectangle[colors.length];
                stage.hide.connect (Clutter.main_quit);

                create_rectangles ();

                stage.color = Color () { alpha = 255 };
                stage.show_all ();
        }

        private void create_rectangles () {
                for (int i = 0; i < colors.length; i++) {
                        var r = new Rectangle ();

                        r.width = r.height = stage.height / colors.length;
                        r.color = Color.from_string (colors[i]);
                        r.anchor_gravity = Gravity.CENTER;
                        r.y = i * r.height + r.height / 2;

                        stage.add_actor (r);

                        rectangles[i] = r;
                }
        }

        public void start () {
                var animations = new Animation[rectangles.length];
                for (int i = 0; i < rectangles.length; i++) {
                        animations[i] = rectangles[i].animate (
                                                  AnimationMode.LINEAR, 5000,
                                                  "x", stage.width / 2,
                                                  "rotation-angle-z", 500.0);
                        animations[i].timeline.start ();
                }
                animations[animations.length - 1].timeline.completed.connect (() => {
                        var text = new Text.full ("Bitstream Vera Sans 40",
                                                  "Congratulations!",
                                                  Color.from_string ("white"));

                        text.set_anchor_point_from_gravity (Gravity.CENTER);
                        text.x = stage.width / 2;
                        text.y = -text.height;  // Off-stage
                        stage.add_actor (text);
                        text.show ();
                        var text_anim = text.animate (AnimationMode.EASE_OUT_BOUNCE, 3000,
                                                      "y", stage.height / 2);
                        text_anim.timeline.start ();

                        for (int i = 0; i < rectangles.length; i++) {
                                animations[i] = rectangles[i].animate (
                                        AnimationMode.EASE_OUT_BOUNCE, 3000,
                                        "x", Random.next_double () * stage.width,
                                        "y", Random.next_double () * stage.height / 2
                                                                   + stage.height / 2,
                                        "rotation-angle-z", rectangles[i].rotation_angle_z,
                                        "opacity", 0.0);

                                animations[i].timeline.start ();
                        }
                });
        }
}

void main (string[] args) {
        Clutter.init (ref args);
        var demo = new ClutterDemo ();
        demo.start ();
        Clutter.main ();
}