public LoopStaggeredGridViewItem GetNewItemByGroupAndIndex(int groupIndex, int indexInGroup)
{
if (indexInGroup < 0)
{
return(null);
}
if (mItemTotalCount == 0)
{
return(null);
}
LoopStaggeredGridViewItem newItem = null;
int index = 0;
List <int> mItemIndexMap = mItemGroupList[groupIndex].ItemIndexMap;
int count = mItemIndexMap.Count;
if (count > indexInGroup)
{
index = mItemIndexMap[indexInGroup];
newItem = mOnGetItemByItemIndex(this, index);
if (newItem == null)
{
return(null);
}
newItem.StartPosOffset = mLayoutParam.mCustomColumnOrRowOffsetArray[groupIndex];
newItem.ItemIndexInGroup = indexInGroup;
newItem.ItemIndex = index;
newItem.ItemCreatedCheckFrameCount = mListUpdateCheckFrameCount;
return(newItem);
}
if (count != indexInGroup)
{
return(null);
}
int curMaxCreatedItemIndexCount = mItemIndexDataList.Count;
if (curMaxCreatedItemIndexCount >= mItemTotalCount)
{
return(null);
}
index = curMaxCreatedItemIndexCount;
newItem = mOnGetItemByItemIndex(this, index);
if (newItem == null)
{
return(null);
}
mItemIndexMap.Add(index);
ItemIndexData indexData = new ItemIndexData();
indexData.mGroupIndex = groupIndex;
indexData.mIndexInGroup = indexInGroup;
mItemIndexDataList.Add(indexData);
newItem.StartPosOffset = mLayoutParam.mCustomColumnOrRowOffsetArray[groupIndex];
newItem.ItemIndexInGroup = indexInGroup;
newItem.ItemIndex = index;
newItem.ItemCreatedCheckFrameCount = mListUpdateCheckFrameCount;
return(newItem);
}
public float GetItemAbsPosByItemIndex(int itemIndex)
{
if (itemIndex < 0 || itemIndex >= mItemIndexDataList.Count)
{
return(-1);
}
ItemIndexData tData = mItemIndexDataList[itemIndex];
return(mItemGroupList[tData.mGroupIndex].GetItemPos(tData.mIndexInGroup));
}
public float GetItemAbsPosByItemIndex(int itemIndex)
{
if (itemIndex < 0 || itemIndex >= this.mItemIndexDataList.Count)
{
return(-1f);
}
ItemIndexData mItemIndexData = this.mItemIndexDataList[itemIndex];
return(this.mItemGroupList[mItemIndexData.mGroupIndex].GetItemPos(mItemIndexData.mIndexInGroup));
}
public void RefreshItemByItemIndex(int itemIndex)
{
ItemIndexData itemIndexData = this.GetItemIndexData(itemIndex);
if (itemIndexData == null)
{
return;
}
this.GetItemGroupByIndex(itemIndexData.mGroupIndex).RefreshItemByIndexInGroup(itemIndexData.mIndexInGroup);
}
public void OnItemSizeChanged(int itemIndex)
{
ItemIndexData itemIndexData = this.GetItemIndexData(itemIndex);
if (itemIndexData == null)
{
return;
}
this.GetItemGroupByIndex(itemIndexData.mGroupIndex).OnItemSizeChanged(itemIndexData.mIndexInGroup);
}
/*
* To update a item by itemIndex.if the itemIndex-th item is not visible, then this method will do nothing.
* Otherwise this method will first call onGetItemByIndex(itemIndex) to get a updated item and then reposition all visible items'position.
*/
public void RefreshItemByItemIndex(int itemIndex)
{
ItemIndexData indexData = GetItemIndexData(itemIndex);
if (indexData == null)
{
return;
}
StaggeredGridItemGroup group = GetItemGroupByIndex(indexData.mGroupIndex);
group.RefreshItemByIndexInGroup(indexData.mIndexInGroup);
}
/*
* For a vertical scrollrect, when a visible item’s height changed at runtime,
* then this method should be called to let the LoopStaggeredGridView component reposition all visible items’ position of the same group (that is the same column / row).
* For a horizontal scrollrect, when a visible item’s width changed at runtime,
* then this method should be called to let the LoopStaggeredGridView component reposition all visible items’ position of the same group (that is the same column / row).
*/
public void OnItemSizeChanged(int itemIndex)
{
ItemIndexData indexData = GetItemIndexData(itemIndex);
if (indexData == null)
{
return;
}
StaggeredGridItemGroup group = GetItemGroupByIndex(indexData.mGroupIndex);
group.OnItemSizeChanged(indexData.mIndexInGroup);
}
//To get the visible item by itemIndex. If the item is not visible, then this method return null.
public LoopStaggeredGridViewItem GetShownItemByItemIndex(int itemIndex)
{
ItemIndexData indexData = GetItemIndexData(itemIndex);
if (indexData == null)
{
return(null);
}
StaggeredGridItemGroup group = GetItemGroupByIndex(indexData.mGroupIndex);
return(group.GetShownItemByIndexInGroup(indexData.mIndexInGroup));
}
public LoopStaggeredGridViewItem GetShownItemByItemIndex(int itemIndex)
{
ItemIndexData itemIndexData = this.GetItemIndexData(itemIndex);
return(itemIndexData == null ? (LoopStaggeredGridViewItem)null : this.GetItemGroupByIndex(itemIndexData.mGroupIndex).GetShownItemByIndexInGroup(itemIndexData.mIndexInGroup));
}
