public void RefreshItemAmountInEditor(int itemAmount)
{
if (Application.isPlaying)
{
return;
}
dataAmount = itemAmount;
RefreshMaxRowAndColumnAmount();
int currentItemAmount = itemList.Count;
if (currentItemAmount > itemAmount)
{
for (int i = currentItemAmount - itemAmount - 1; i >= 0; i--)
{
ScrollItem item = itemList[itemList.Count - 1];
DestroyImmediate(item.gameObject);
itemList.RemoveAt(itemList.Count - 1);
}
}
else if (currentItemAmount < itemAmount)
{
int newAmount = itemAmount - currentItemAmount;
for (int i = 0; i < newAmount; i++)
{
GameObject newItemObject = Instantiate(prefab, ScrollRect.content);
ScrollItem newItem = new ScrollItem(newItemObject);
newItem.SetSize(cellSize);
newItem.gameObject.SetActive(true);
itemList.Add(newItem);
}
}
}
private void PutItemBackToPool(ScrollItem item)
{
#if UNITY_EDITOR
if (itemPoolList.Contains(item))
{
Debug.LogError("Scroll Enhancement 同一个item回收了两次");
return;
}
#endif
item.gameObject.SetActive(false);
itemPoolList.Add(item);
}
private ScrollItem GetItemAtDataIndex(int index)
{
for (int i = 0; i < itemList.Count; i++)
{
ScrollItem item = itemList[i];
if (item.dataIndex == index)
{
return(item);
}
}
return(null);
}
/// <summary>
/// 刷新一次所有的item
/// </summary>
public void RefreshItemsContent()
{
for (int i = 0; i < itemList.Count; i++)
{
ScrollItem item = itemList[i];
if (item.dataIndex < 0 || item.dataIndex >= dataAmount)
{
continue;
}
if (onItemNeedRefreshContentCallback != null)
{
onItemNeedRefreshContentCallback.Call(item.dataIndex, item.itemLuaClass);
}
}
}
public void RefreshItemsLayoutInEditor()
{
if (Application.isPlaying)
{
return;
}
RefreshMaxRowAndColumnAmount();
for (int i = 0; i < itemList.Count; i++)
{
ScrollItem item = itemList[i];
item.SetSize(cellSize);
Vector2 itemPos = CalculateIndexItemAnchorPosition(i);
item.SetAnchorPosition(itemPos);
item.SetSize(cellSize);
}
}
private ScrollItem GetItemFromPool()
{
if (itemPoolList.Count > 0)
{
ScrollItem item = itemPoolList[itemPoolList.Count - 1];
itemPoolList.RemoveAt(itemPoolList.Count - 1);
item.gameObject.SetActive(true);
return(item);
}
GameObject newItemObject = Instantiate(prefab);
ScrollItem newItem = new ScrollItem(newItemObject);
newItem.gameObject.SetActive(true);
newItem.rectTransform.SetParent(ScrollRect.content);
newItem.rectTransform.localScale = Vector3.one;
if (onCreateNewItemPrefabCallback != null)
{
newItem.itemLuaClass = onCreateNewItemPrefabCallback.Invoke <RectTransform, LuaTable>(newItem.rectTransform);
}
return(newItem);
}
public void UpdateItemsVisibility()
{
//hide items
int itemNeedStartDataIndex;
int itemNeedEndDataIndex;
if (startAxis == Axis.Horizontal)
{
itemNeedStartDataIndex = VisibleRowStartIndex * maxColumnAmount;
itemNeedEndDataIndex = VisibleRowEndIndex * maxColumnAmount;
}
else
{
itemNeedStartDataIndex = VisibleColumnStartIndex * maxRowAmount;
itemNeedEndDataIndex = VisibleColumnEndIndex * maxRowAmount;
}
for (int i = itemList.Count - 1; i >= 0; i--)
{
ScrollItem item = itemList[i];
if (item.dataIndex >= dataAmount)
{
PutItemBackToPool(item);
itemList.RemoveAt(i);
continue;
}
if (item.dataIndex < itemNeedStartDataIndex)
{
PutItemBackToPool(item);
itemList.RemoveAt(i);
continue;
}
if (item.dataIndex > itemNeedEndDataIndex)
{
PutItemBackToPool(item);
itemList.RemoveAt(i);
}
}
//new items
for (int i = itemNeedStartDataIndex; i <= itemNeedEndDataIndex; i++)
{
if (i < 0 || i >= dataAmount)
{
continue;
}
ScrollItem item = GetItemAtDataIndex(i);
if (item == null)
{
item = GetItemFromPool();
itemList.Add(item);
if (onItemNeedRefreshContentCallback != null)
{
onItemNeedRefreshContentCallback.Call(i, item.itemLuaClass);
}
}
item.SetSize(cellSize);
item.SetDataIndex(i);
Vector2 itemPosition = CalculateIndexItemAnchorPosition(i);
item.SetAnchorPosition(itemPosition);
}
}
