void SetDataForItemAtIndex(ScrollItem item, int index)
{
switch (dataType)
{
case DataSourceType.CS:
if (updateFuncCS != null && csData != null)
{
updateFuncCS(item, csData[index]);
}
break;
#if USE_LUA_FRAMEWORK
case DataSourceType.Lua:
if (updateFuncLua != null && luaData != null)
{
updateFuncLua.Call(item, luaData[index + 1]);
}
break;
#endif
default:
break;
}
SetPosForItemAtIndex(item, index);
}
void SetPosForItemAtIndex(ScrollItem item, int index)
{
Rect r = managedItems[index].rect;
item.rectTransform.localPosition = r.position;
item.rectTransform.sizeDelta = r.size;
}
void InitPool()
{
GameObject poolNode = new GameObject("POOL");
poolNode.SetActive(false);
poolNode.transform.SetParent(transform, false);
itemPool = new SimpleObjPool <ScrollItem>(
poolSize,
(ScrollItem item) => {
if (recycleFunc != null)
{
recycleFunc(item);
}
item.transform.SetParent(poolNode.transform, false);
},
() => {
GameObject itemObj = Instantiate(itemTemplate.gameObject);
ScrollItem item = itemObj.GetComponent <ScrollItem>();
itemObj.transform.SetParent(poolNode.transform, false);
RectTransform rectTrans = item.rectTransform;
rectTrans.anchorMin = Vector2.up;
rectTrans.anchorMax = Vector2.up;
rectTrans.pivot = Vector2.zero;
//rectTrans.pivot = Vector2.up;
return(item);
});
}
void CheckAndHideItem(int criticalItemType)
{
ScrollItem item = null;
int criticalIndex = -1;
while (true)
{
item = GetCriticalItem(criticalItemType);
criticalIndex = criticalItemIndex[criticalItemType];
if (item != null && !ShouldItemSeenAtIndex(criticalIndex))
{
itemPool.Recycle(item);
managedItems[criticalIndex].item = null;
//Debug.Log("回收了 " + criticalIndex);
criticalItemIndex[criticalItemType + 2] = criticalIndex;
if (criticalItemType == CriticalItemType.UpToHide)
{
// 最上隐藏了一个
criticalItemIndex[criticalItemType]++;
}
else
{
// 最下隐藏了一个
criticalItemIndex[criticalItemType]--;
}
criticalItemIndex[criticalItemType] = Mathf.Clamp(criticalItemIndex[criticalItemType], 0, m_dataCount - 1);
}
else
{
break;
}
}
}
void OnGetItemForDataIndex(ScrollItem item, int index)
{
if (activateFunc != null)
{
activateFunc(item);
}
SetDataForItemAtIndex(item, index);
item.transform.SetParent(content, false);
}
void CheckAndShowItem(int criticalItemType)
{
ScrollItem item = null;
int criticalIndex = -1;
while (true)
{
item = GetCriticalItem(criticalItemType);
criticalIndex = criticalItemIndex[criticalItemType];
//if (item == null && ShouldItemFullySeenAtIndex(criticalItemIndex[criticalItemType - 2]))
if (item == null && ShouldItemSeenAtIndex(criticalIndex))
{
ScrollItem newItem = itemPool.Get();
OnGetItemForDataIndex(newItem, criticalIndex);
//Debug.Log("创建了 " + criticalIndex);
managedItems[criticalIndex].item = newItem;
criticalItemIndex[criticalItemType - 2] = criticalIndex;
if (criticalItemType == CriticalItemType.UpToShow)
{
// 最上显示了一个
criticalItemIndex[criticalItemType]--;
}
else
{
// 最下显示了一个
criticalItemIndex[criticalItemType]++;
}
criticalItemIndex[criticalItemType] = Mathf.Clamp(criticalItemIndex[criticalItemType], 0, m_dataCount - 1);
}
else
{
break;
}
}
}
void UpdateManagedItems(bool resize)
{
if (resize)
{
#if USE_LUA_FRAMEWORK
int newDataCount = (dataType == DataSourceType.CS ? csData.Length : luaData.Length);
#else
int newDataCount = csData.Count;
#endif
if (newDataCount > managedItems.Length) //增加
{
Array.Resize(ref managedItems, newDataCount);
}
else //减少
{
for (int i = newDataCount; i < m_dataCount; i++)
{
if (managedItems[i].item != null)
{
itemPool.Recycle(managedItems[i].item);
managedItems[i].item = null;
}
}
//Array.Resize(ref managedItems, newDataCount); //减少时保留之前多余的空位
}
m_dataCount = newDataCount;
}
CacheRect();
int showCount = Mathf.Min(maxShownCount, m_dataCount);
int restCount = showCount;
bool hasItem, shouldShow;
int firstIndex = -1, lastIndex = -1;
for (int i = 0; i < m_dataCount && restCount > 0; i++)
{
hasItem = managedItems[i].item != null;
shouldShow = ShouldItemSeenAtIndex(i);
if (shouldShow)
{
restCount--;
if (firstIndex == -1)
{
firstIndex = i;
}
lastIndex = i;
}
if (hasItem && shouldShow)
{
// 应显示且已显示
SetDataForItemAtIndex(managedItems[i].item, i);
continue;
}
if (hasItem == shouldShow)
{
// 不应显示且未显示
continue;
}
if (hasItem && !shouldShow)
{
// 不该显示 但是有
itemPool.Recycle(managedItems[i].item);
managedItems[criticalItemIndex[i]].item = null;
continue;
}
if (shouldShow && !hasItem)
{
// 需要显示 但是没有
ScrollItem item = itemPool.Get();
OnGetItemForDataIndex(item, i);
managedItems[i].item = item;
continue;
}
}
// content.localPosition = Vector2.zero;
criticalItemIndex[CriticalItemType.UpToHide] = firstIndex;
criticalItemIndex[CriticalItemType.DownToHide] = lastIndex;
criticalItemIndex[CriticalItemType.UpToShow] = Mathf.Max(firstIndex - 1, 0);
criticalItemIndex[CriticalItemType.DownToShow] = Mathf.Min(lastIndex + 1, m_dataCount - 1);
}