public bool GetItemIndexAndPosAtGivenPos(float pos, ref int index, ref float itemPos)
{
Update(true);
index = 0;
itemPos = 0f;
int count = mItemSizeGroupList.Count;
if (count == 0)
{
return(true);
}
ItemSizeGroup hitGroup = null;
int low = 0;
int high = count - 1;
if (mItemDefaultSize == 0f)
{
if (mMaxNotEmptyGroupIndex < 0)
{
mMaxNotEmptyGroupIndex = 0;
}
high = mMaxNotEmptyGroupIndex;
}
while (low <= high)
{
int mid = (low + high) / 2;
ItemSizeGroup tGroup = mItemSizeGroupList[mid];
if (tGroup.mGroupStartPos <= pos && tGroup.mGroupEndPos >= pos)
{
hitGroup = tGroup;
break;
}
else if (pos > tGroup.mGroupEndPos)
{
low = mid + 1;
}
else
{
high = mid - 1;
}
}
int hitIndex = -1;
if (hitGroup != null)
{
hitIndex = hitGroup.GetItemIndexByPos(pos - hitGroup.mGroupStartPos);
}
else
{
return(false);
}
if (hitIndex < 0)
{
return(false);
}
index = hitIndex + hitGroup.mGroupIndex * mItemMaxCountPerGroup;
itemPos = hitGroup.GetItemStartPos(hitIndex);
return(true);
}
