PlayBook GPS tracking test app

package {
    import caurina.transitions.Tweener;

    import flash.display.Sprite;
    import flash.display.Screen;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;

    import flash.events.StatusEvent;
    import flash.events.GeolocationEvent;
    import flash.sensors.Geolocation;

    import flash.text.TextFieldAutoSize;
    import flash.utils.*;

    import mx.utils.ObjectUtil;

    import qnx.ui.text.Label;
    import qnx.system.QNXSystemResource;
    import qnx.system.QNXSystem;

    [SWF(backgroundColor="#cccccc")]
    public class GeolocationTest extends Sprite {
        private var label:Label = new Label();

        private var geo:Geolocation;
        private var base_time:int = getTimer();

        public function GeolocationTest() {
            stage.align = StageAlign.TOP_LEFT;
            stage.scaleMode = StageScaleMode.NO_SCALE;

            label.autoSize = TextFieldAutoSize.LEFT;
            label.x = 10;
            label.y = 10;
            label.text = "Just walk away.";
            addChild(label);

            if (!Geolocation.isSupported) {
                label.text = 'Geolocation not supported!';
                trace(label.text);
                return;
            }

            geo = new Geolocation();

            // muted would mean user didn't grant permission for read_geolocation
            if (geo.muted) {
                label.text = 'Geolocation muted';
                trace(label.text);
            }

            geo.setRequestedUpdateInterval(5000);

            // when unit goes to standby, gets STATUS event wiht Geolocation.Unmuted
            // and when out of standby, says Geolocation.Muted!
            geo.addEventListener(StatusEvent.STATUS, onStatusEvent);

            geo.addEventListener(GeolocationEvent.UPDATE, onGeolocationEvent);

            trace(getTimer(), ObjectUtil.toString(QNXSystem.system.getResources()));
            QNXSystem.system.requestResource(QNXSystemResource.GEOLOCATION);
            trace('after request', ObjectUtil.toString(QNXSystem.system.getResources()));
        }

        private function onStatusEvent(e:StatusEvent):void {
            trace(getTimer(), e.type, e.code, e.target, geo.muted);
        }

        private var done_first:Boolean;
        private function onGeolocationEvent(e:GeolocationEvent):void {
            if (!done_first) {
                done_first = true;
                trace(getTimer(), 'FIRST', e.timestamp.toFixed(6), e.type);
            }

            var msg:String = e.timestamp.toFixed(6) + ': (' +
                e.latitude.toFixed(6) + ', ' +
                e.longitude.toFixed(6) + ', ' +
                int(e.altitude).toString() + 'm)  / +/- ' +
                e.horizontalAccuracy.toFixed(1) + 'm/' +
                e.verticalAccuracy.toFixed(1) + 'm, ' +
                e.speed.toFixed(2) + 'm/s, ' +
                e.heading.toFixed(1) + '\u00b0';

            label.text = msg;
            trace(msg);
        }
    }
}