void Start()
{
assetManager = GameObject.Find ("AssetManager").GetComponent ("AssetManager") as AssetManager;
parameterList = GameObject.Find ("ParameterList").GetComponent ("ParameterList") as ParameterList;
foreach (KeyValuePair<string, GameObject> kv in assetManager.prefabs) {
objects.Add(kv.Key);
}
listItems = objects.ToArray ();
bgRect = new Rect (bgLeft, bgTop, bgWidth, bgHeight);
//left and right side Add button
leftAddRect = new Rect(bgLeft, bgTop+bgHeight+Screen.height/48, bgWidth, 25);
rightAddRect = new Rect (19*bgLeft, bgTop + bgHeight + Screen.height / 48, bgWidth, 25);
}