// Copyright (c) 2007 Alberto Ruiz <aruiz@gnome.org>
// All Rights Reserved.
// Published under the BSD License.

using Clutter;
using GLib;
using Gdk;
using Math;

class SuperOh {
  private Clutter.Timeline timeline;
  private Clutter.Group oh_group;
  private uint n_hands;

  construct {
    n_hands = 5;
    Clutter.Stage default_stage =
		    (Clutter.Stage) Clutter.Stage.get_default ();
 
    timeline = new Clutter.Timeline (360, 60);
    timeline.loop = true;
    timeline.new_frame += frame_cb;
   
    Clutter.Actor stage = Clutter.Stage.get_default ();
    stage.set_size (800, 600);
    Gdk.Pixbuf redhand = Gdk.Pixbuf.from_file ("redhand.png", null);

    Clutter.Alpha alpha = new Clutter.Alpha ();
    alpha.set_timeline (timeline);
    alpha.set_func (Clutter.sine_func, null, null);

    oh_group = new Clutter.Group ();

    Clutter.Texture hand_texture =
		      Clutter.Texture.from_pixbuf (redhand); 

    for (uint i = 0; i < n_hands ; i++) {
      Clutter.CloneTexture hand =
                             new Clutter.CloneTexture (hand_texture);
      
      int w = hand_texture.get_width ();
      int h = hand_texture.get_height ();

      int x = default_stage.get_width () / 2
              + get_radius ()
              * Math.cos ((float) i * (float) 3.14159265358979323846
			  / ((float) n_hands / 2.))
              - w / 2;

      int y = (float) default_stage.get_height () / 2.
              + get_radius ()
              * Math.sin ((float) i * (float) 3.14159265358979323846
                          / ((float) n_hands / 2.))
              - (float) h / 2.;

      hand.set_position (x, y);
            
      oh_group.add_actor ((Clutter.Actor) hand);
    }
    oh_group.show_all ();
  }

  public void timeline_start () { timeline.start (); }

  private uint get_radius () {
     Clutter.Stage default_stage = (Clutter.Stage) Clutter.Stage.get_default ();
     return (default_stage.get_width () + default_stage.get_height ()) / 6;
  }

  private void frame_cb (Clutter.Timeline tl, int frame_num) {
    Clutter.Stage default_stage = (Clutter.Stage) Clutter.Stage.get_default ();
    oh_group.rotate_z (frame_num,
		       (int) default_stage.get_width () / 2,
		       (int) default_stage.get_height () / 2);
      
    for (int i = 0; i < n_hands; i++) {
      
      Clutter.Actor hand = oh_group.get_nth_child(i);

      float angle = frame_num * -1;
      
      hand.rotate_x (angle,
		     (int) hand.get_width () / 2,
		     (int) hand.get_height () / 2);
      hand.rotate_y (angle,
		     (int) hand.get_width () / 2,
		     (int) hand.get_height () / 2);
    }
  }

  public Clutter.Group get_group () { return oh_group; }

}

class TestActors {
  static void main (string[] args) {
    Clutter.init (out args);

    Clutter.Stage stage = (Clutter.Stage) Clutter.Stage.get_default ();
    Clutter.Color background;
    stage.get_color(out background);
    background.red = (char) 0x61;
    background.green = (char) 0x64;
    background.blue = (char) 0x8c;
    background.alpha = (char) 0xff;
    stage.set_color (out background);

    SuperOh hands = new SuperOh ();
    hands.timeline_start ();
    stage.add_actor (hands.get_group ());

    stage.show_all ();

    Clutter.main ();
  }
}