//****************************************************************************************************
//
//****************************************************************************************************
public void Update()
{
if (updateHierarchy)
{
UpdateItemsDatas();
}
if (dirty == false)
{
return;
}
else
{
dirty = false;
}
RectTransform xform = (itemTemplate != null) ? itemTemplate.GetComponent <RectTransform>() : null;
float itemH = (xform != null) ? xform.rect.height : 0;
int aperture = (itemH > 0) ? ( int )(viewport.rect.height / itemH) : 0;
int firstVisible = (datas.Count > 0) ? ( int )((1.0f - scrollbar.value) * (datas.Count - 1)) : 0;
int lastVisible = (datas.Count > 0) ? Mathf.Clamp(firstVisible + aperture, firstVisible, datas.Count - 1) : 0;
int nbVisible = (datas.Count > 0) && (aperture > 0) ? lastVisible - firstVisible + 1 : 0;
for (int item = 0; item < items.Count;)
{
int index = items[item].index;
if ((nbVisible <= 0) || (index < firstVisible) || (index > lastVisible))
{
ShowItemObject(items[item].obj, false);
pool.Release(items[item]);
items.RemoveAt(item);
dic.Remove(index);
}
else
{
++item;
}
}
for (int item = 0; item < nbVisible; ++item)
{
int index = firstVisible + item;
if (dic.ContainsKey(index))
{
items[item].ReflectDatas(selection);
continue;
}
UIListItem instance = pool.Grab();
if (instance == null)
{
instance = CreateItem();
instance.Setup(this, -1, GameObject.Instantiate <GameObject>(itemTemplate));
if (instance.obj != null)
{
instance.obj.hideFlags = HideFlags.DontSave;
}
}
if (instance != null)
{
instance.index = index;
instance.datas = datas[index];
items.Add(instance);
dic.Add(instance.index, instance);
instance.xform.SetParent(content, false);
instance.xform.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, content.rect.width);
instance.xform.localPosition = -(Vector3.up * ((index * itemH) + (itemH * 0.5f)));
instance.ReflectDatas(selection);
if (instance.but != null)
{
instance.but.onClick.RemoveAllListeners();
instance.but.onClick.AddListener(delegate { SelectItem(index); });
}
ShowItemObject(instance.obj, true);
}
}
content.sizeDelta = new Vector2(content.sizeDelta.x, (datas.Count * itemH));
}
