nape example: button

package example
{
    import example.button.buttonInfo;
    import example.button.buttonUtils;
    import flash.display.DisplayObjectContainer;
    import nape.geom.Vec2;
    import nape.phys.Body;

    /**
     * ...
     * @author liu wong
     *
     */

    public class buttonExample extends baseExample
    {
        private const spawnPos:Vec2 = new Vec2(50, 50);

        private var buttons:Array/*buttonInfo*/;

        private var circle:Body;

        public function buttonExample(prnt:DisplayObjectContainer):void
        {
            super(prnt);
        }

        override protected function init():void
        {
            super.init();

            space.gravity.setxy(0, 980);

            addHand();

            addWalls();

            var k:int = 12;
            var i:int;

            addRectangle(320, 300, 580, 10, (Math.PI / 180) * 10);

            buttons = new Array();

            for (i = 0; i < k; i++)
            {
                var button:buttonInfo = buttonUtils.createButton(space, new Vec2((640 / (k + 1)) * (i + 1), 200+(100 / (k + 1)) * (i + 1)), 45, 20, 35, (Math.PI / 180) * 10);
                button.id = i;
                button.onTrigger = onButton;
                buttons.push(button);
            }

            circle = addCircle(spawnPos.x, spawnPos.y, 25, 0, false);

            var b:Body = addRectangle(320, 460, 640, 10);
            b.surfaceVel.setxy( -100, 0);
        }

        private function onButton(src:buttonInfo, value:Boolean):void
        {
            if (value == true)
            {
                if (src.id == 11)
                {
                    circle.position.set(spawnPos);
                    return;
                }

                if (src.id == 7)
                {
                    addRectangle(620, 40, 10, 10, Math.random() * Math.PI * 2, false);
                    return;
                }
            }
        }

        override public function update():void
        {
            super.update();

            var k:int = buttons.length;
            var i:int;

            for (i = 0; i < k; i++)
                buttons[i].update();
        }
    }

}