void OnScroll(float value)
{
var oldTopHiddenItems = topHiddenItems;
topHiddenItems = GetFirstVisibleIndex();
bottomHiddenItems = Math.Max(0, strings.Count - visibleItems - topHiddenItems);
if (oldTopHiddenItems == topHiddenItems)
{
//do nothing
}
// optimization on +-1 item scroll
else if (oldTopHiddenItems == (topHiddenItems + 1))
{
var bottomComponent = ComponentTopToBottom();
bottomComponent.Index = topHiddenItems;
bottomComponent.Text.text = strings[topHiddenItems];
Coloring(bottomComponent);
}
else if (oldTopHiddenItems == (topHiddenItems - 1))
{
var topComponent = ComponentBottomToTop();
var new_index = topHiddenItems + visibleItems - 1;
topComponent.Index = new_index;
topComponent.Text.text = strings[new_index];
Coloring(topComponent);
}
// all other cases
else
{
//!
var new_indicies = Enumerable.Range(topHiddenItems, visibleItems).ToArray();
components.ForEach((x, i) => {
x.Index = new_indicies[i];
x.Text.text = strings[new_indicies[i]];
Coloring(x);
});
}
UpdateTopFiller();
UpdateBottomFiller();
if (layout)
{
layout.NeedUpdateLayout();
}
}
protected void UpdateView()
{
RemoveCallbacks();
if ((CanOptimize()) && (customItems.Count > 0))
{
visibleItems = (maxVisibleItems < customItems.Count) ? maxVisibleItems : customItems.Count;
}
else
{
visibleItems = customItems.Count;
}
components = GetNewComponents();
var base_items = new List <ListViewItem>();
components.ForEach(x => base_items.Add(x));
base.Items = base_items;
components.ForEach((x, i) => {
x.Index = i;
SetData(x, customItems[i]);
Coloring(x as ListViewItem);
});
AddCallbacks();
topHiddenItems = 0;
bottomHiddenItems = customItems.Count() - visibleItems;
SetTopFiller();
SetBottomFiller();
#if UNITY_4_6_1
// force ContentSizeFitter update text width
//scrollRect.verticalScrollbar.value += 0.1f;
#endif
if (layout)
{
//force rebuild
layout.NeedUpdateLayout();
//layout.UpdateLayout();
}
}
