/// <summary>
/// Scrolls to item with specifid index.
/// </summary>
/// <param name="index">Index.</param>
public override void ScrollTo(int index)
{
if (!CanOptimize())
{
return;
}
var top = GetScrollValue();
var bottom = GetScrollValue() + scrollHeight;
var item_starts = ItemStartAt(index);
var item_ends = ItemEndAt(index) + LayoutBridge.GetMargin();
if (item_starts < top)
{
SetScrollValue(item_starts);
}
else if (item_ends > bottom)
{
SetScrollValue(item_ends - GetScrollSize());
}
}
/// <summary>
/// Gets the item position bottom.
/// </summary>
/// <returns>The item position bottom.</returns>
/// <param name="index">Index.</param>
public override float GetItemPositionBottom(int index)
{
return(GetItemPosition(index) + DataSource[index].Height - LayoutBridge.GetSpacing() + LayoutBridge.GetMargin() - GetScrollSize());
}
/// <summary>
/// Gets the item position bottom.
/// </summary>
/// <returns>The item position bottom.</returns>
/// <param name="index">Index.</param>
public override float GetItemPositionBottom(int index)
{
var block = Mathf.Min(GetBlockIndex(index) + 1, BlockSizes.Count);
return(BlockSizes.GetRange(0, block).SumFloat() + (LayoutBridge.GetSpacing() * (block - 1)) + LayoutBridge.GetMargin() - GetScrollSize());
}