void UpdateStickeyHeadPos()
{
bool isHeadItemVisible = mStickeyHeadItem.gameObject.activeSelf;
int count = mLoopListView.ShownItemCount;
if (count == 0)
{
if (isHeadItemVisible)
{
mStickeyHeadItem.gameObject.SetActive(false);
}
return;
}
LoopListViewItem2 item0 = mLoopListView.GetShownItemByIndex(0);
Vector3 topPos0 = mLoopListView.GetItemCornerPosInViewPort(item0, ItemCornerEnum.LeftTop);
LoopListViewItem2 targetItem = null;
float start = topPos0.y;
float end = start - item0.ItemSizeWithPadding;
int targetItemShownIndex = -1;
if (start <= 0)
{
if (isHeadItemVisible)
{
mStickeyHeadItem.gameObject.SetActive(false);
}
return;
}
if (end < 0)
{
targetItem = item0;
targetItemShownIndex = 0;
}
else
{
for (int i = 1; i < count; ++i)
{
LoopListViewItem2 item = mLoopListView.GetShownItemByIndexWithoutCheck(i);
start = end;
end = start - item.ItemSizeWithPadding;
if (start >= 0 && end <= 0)
{
targetItem = item;
targetItemShownIndex = i;
break;
}
}
}
if (targetItem == null)
{
if (isHeadItemVisible)
{
mStickeyHeadItem.gameObject.SetActive(false);
}
return;
}
int itemIndex = targetItem.UserIntData1;
int childIndex = targetItem.UserIntData2;
TreeViewItemCountData countData = mTreeItemCountMgr.GetTreeItem(itemIndex);
if (countData == null)
{
if (isHeadItemVisible)
{
mStickeyHeadItem.gameObject.SetActive(false);
}
return;
}
if (countData.mIsExpand == false || countData.mChildCount == 0)
{
if (isHeadItemVisible)
{
mStickeyHeadItem.gameObject.SetActive(false);
}
return;
}
if (isHeadItemVisible == false)
{
mStickeyHeadItem.gameObject.SetActive(true);
}
if (mStickeyHeadItem.TreeItemIndex != itemIndex)
{
TreeViewItemData treeViewItemData = TreeViewDataSourceMgr.Get.GetItemDataByIndex(itemIndex);
mStickeyHeadItem.mText.text = treeViewItemData.mName;
mStickeyHeadItem.SetItemData(itemIndex, countData.mIsExpand);
}
mStickeyHeadItem.gameObject.transform.localPosition = Vector3.zero;
float lastChildPosAbs = -end;
float lastPadding = targetItem.Padding;
if (lastChildPosAbs - lastPadding >= mStickeyHeadItemHeight)
{
return;
}
for (int i = targetItemShownIndex + 1; i < count; ++i)
{
LoopListViewItem2 item = mLoopListView.GetShownItemByIndexWithoutCheck(i);
if (item.UserIntData1 != itemIndex)
{
break;
}
lastChildPosAbs += item.ItemSizeWithPadding;
lastPadding = item.Padding;
if (lastChildPosAbs - lastPadding >= mStickeyHeadItemHeight)
{
return;
}
}
float y = mStickeyHeadItemHeight - (lastChildPosAbs - lastPadding);
mStickeyHeadItemRf.anchoredPosition3D = new Vector3(0, y, 0);
}