protected void RenderItem(LoopVerticalItem loopItem, int idx)
{
var oldRect = loopItem.rect;
var oldIdx = loopItem.index;
if (idx < dataLength)
{
var templateId = 0;
if (onGetItemTemplateType != null)
{
templateId = onGetItemTemplateType(this.parameter, idx);
}
var item = OnCreateOrGetItem(idx, templateId, loopItem, content); //
// item.name = string.Format("item {0} {1}", idx, templateId);
// Debug.LogFormat("RenderItem oldIdx={0},item={1},loopItem={2},idx={3},templateId={4} ", oldIdx, item, loopItem.item, idx, templateId);
var rent = item.GetComponent <RectTransform>();
loopItem.transform = rent;
loopItem.item = item;
loopItem.index = idx;
}
var gObj = loopItem?.item.gameObject;
if (idx >= dataLength)
{
// CalcBounds (loopItem, oldIdx, oldRect); //删除时候需要计算bounds
if (gObj)
{
gObj.SetActive(false);
}
loopItem.index = -1;
return;
}
else if (!gObj.activeSelf)
{
gObj.SetActive(true);
}
//keep selected
if (m_SelecteStyle != null)
{
if (m_SelecteStyle.loopItem.index == m_SelectedIndex)
{
m_SelecteStyle.SelectedStyle();
}
else if (m_SelecteStyle.loopItem == loopItem)
{
m_SelecteStyle.CancelStyle();
}
}
AddShowList(idx);
onItemRender(this.parameter, loopItem.item, loopItem.index); //填充内容
//
CalcItemBound(loopItem);
// CalcBounds (loopItem, oldIdx, oldRect);
}
Component OnCreateOrGetItem(int idx, int templateId, LoopVerticalItem loopItem, RectTransform content)
{
Component item = loopItem.item;
if (item == null || loopItem.templateType != templateId)
{
//还对象到缓存池
m_Pool.Release(loopItem.templateType, (BindableObject)item);
bool isNew = false;
item = m_Pool.Get(templateId, out isNew); //创建或者从缓存中获取
loopItem.templateType = templateId;
if (isNew)
{
var sourceRT = templates[templateId].GetComponent <RectTransform>();
var itemTrans = item.transform;
itemTrans.SetParent(content);
itemTrans.localScale = sourceRT.localScale;
itemTrans.localRotation = sourceRT.localRotation;
itemTrans.localPosition = sourceRT.localPosition;
if (onInstantiated != null)
{
onInstantiated(this.parameter, item, idx);
}
}
var selecteStyle = item.GetComponent <ILoopSelectStyle>();
if (selecteStyle != null)
{
selecteStyle.InitSytle(loopItem, this);
}
}
return(item);
}
protected void RenderItem(LoopVerticalItem loopItem, int idx)
{
var oldRect = loopItem.rect;
var oldIdx = loopItem.index;
if (idx < dataLength)
{
var templateId = 0;
if (onGetItemTemplateType != null)
{
templateId = onGetItemTemplateType(this.parameter, idx);
}
var item = OnCreateOrGetItem(idx, templateId, loopItem, content); //
item.name = string.Format("item {0} {1}", idx, templateId);
var rent = item.GetComponent <RectTransform> ();
// if (rent.parent == null) {
// rent.SetParent (content);
// rent.rotation = Quaternion.Euler (0, 0, 0);
// rent.localScale = Vector3.one;
// // Vector3 newPos = Vector3.zero;
// // newPos.x = halfPadding;
// // rent.anchoredPosition = newPos;
// }
loopItem.transform = rent;
loopItem.item = item;
loopItem.index = idx;
}
var gObj = loopItem?.item.gameObject;
if (idx >= dataLength)
{
// CalcBounds (loopItem, oldIdx, oldRect); //删除时候需要计算bounds
if (gObj)
{
gObj.SetActive(false);
}
return;
}
else if (!gObj.activeSelf)
{
gObj.SetActive(true);
}
AddShowList(idx);
onItemRender(this.parameter, loopItem.item, loopItem.index); //填充内容
//
CalcItemBound(loopItem);
// CalcBounds (loopItem, oldIdx, oldRect);
}
///<summary>
/// 内容滚动
///</summary>
protected void ScrollLoopVerticalItem()
{
if (velocity.y == 0 && !isTweening)
{
return; //没有移动不需要计算
}
int min = int.MaxValue, max = int.MinValue;
int max1; //= GetBottomItem ();
int min1; //= GetTopItem ();
LoopVerticalItem itemToRender = null;
for (int i = 0; i < m_Pages.Count; i++)
{
var item = m_Pages[i];
if (item.index == -1)
{
return;
}
else
{
min = Math.Min(item.index, min);
}
max = Math.Max(item.index, max);
}
if (velocity.y > 0 || tweenDir.y > 0)
{
UpdateBounds();
// RenderWaitQueue ();
max1 = max;
min1 = min;
// Debug.LogFormat ("m_ViewBounds={0},m_ViewBounds.yMin{1},m_ViewBounds.yMax{2},(min1).yMax={3},(min1).yMax<m_ViewBounds.yMin:{4}",m_ViewBounds, m_ViewBounds.yMin,m_ViewBounds.yMax,GetLoopVerticalItemAt (min1).yMax,Mathf.Abs(GetLoopVerticalItemAt (min1).yMax) < Mathf.Abs (m_ViewBounds.yMin));
while (m_DataLength > max1 && GetLoopVerticalItemAt(min1).yMax < -m_ViewBounds.yMin) //!m_ViewBounds.Overlaps (m_Pages[min1 % pageSize].rect, true)) // move top do down
{
max1 = max1 + 1;
// Debug.LogFormat ("min1={0},max1:{1} yMax:{2}>m_ViewBounds.yMin{3} ", min1, max1, GetLoopVerticalItemAt (min1).yMax, m_ViewBounds.yMin);
if (m_DataLength > max1 && (itemToRender = GetLoopVerticalItemAt(max1)) != null && itemToRender.index != max1)
{
min1 = min1 + 1;
RenderItem(itemToRender, max1);
}
else
{
break;
}
}
}
else if (velocity.y < 0 || tweenDir.y < 0)
{
UpdateBounds();
// RenderWaitQueue ();
max1 = max;
min1 = min;
while (min1 >= 0 && GetLoopVerticalItemAt(max1).yMin > -m_ViewBounds.yMin + Mathf.Abs(m_ViewBounds.height)) //!m_ViewBounds.Overlaps (m_Pages[max1 % pageSize].rect, true)) //move bottom item to top
{
min1 = min1 - 1;
// Debug.LogFormat ("min1={0},max1:{1} yMin:{2}>m_ViewBounds.yMax{3} ", min1, max1, GetLoopVerticalItemAt (max1).yMin, m_ViewBounds.yMax);
if (min1 >= 0 && (itemToRender = GetLoopVerticalItemAt(min1)) != null && itemToRender.index != min1)
{
max1 = max1 - 1;
RenderItem(itemToRender, min1);
}
else
{
break;
}
}
}
}
///<summary>
/// 计算bound 高度
///</summary>
protected void CalcItemBound(LoopVerticalItem loopItem)
{
RectTransform rectTran = loopItem.transform;
if (rectTran.anchorMin != rectTran.anchorMax) //表示宽度适配
{
var offsetMin = rectTran.offsetMin;
var offsetMax = rectTran.offsetMax;
offsetMin.x = halfPadding;
offsetMax.x = -halfPadding;
rectTran.offsetMin = offsetMin;
rectTran.offsetMax = offsetMax;
}
// Debug.LogFormat("LayoutRebuilder.ForceRebuildLayoutImmediate= {0},frame={1}", loopItem.item, Time.frameCount);
LayoutRebuilder.ForceRebuildLayoutImmediate(rectTran); //立马计算布局
var layoutEle = loopItem.item.GetComponent <LayoutElement>();
Vector2 bound = Vector2.zero;
bound.x = halfPadding;
if (layoutEle != null)
{
bound.y = layoutEle.preferredHeight + halfPadding; //高度
}
else
{
bound.y = Mathf.Abs(rectTran.rect.height) + halfPadding;
}
loopItem.SetHeight(bound.y);
// Debug.LogFormat ("End item= {0},layoutEle={1},bound={2},frame={3}", loopItem.item, layoutEle, bound, Time.frameCount);
// int index = loopItem.index;
// //寻找上一条
// //判断方向
// bool findLast = false;
// int idx = index - 1;
// Vector2 lastPos = Vector2.zero;
// if (idx >= 0) {
// var lastItem = GetLoopVerticalItemAt (idx);
// if (lastItem.index == idx) {
// lastPos.y = lastItem.yMax;
// bound.x = lastPos.y + halfPadding;
// findLast = true;
// }
// }
// if (!findLast && (idx = index + 1) < m_DataLength) //寻找下一条
// {
// var lastItem = GetLoopVerticalItemAt (idx);
// if (lastItem.index == idx) {
// lastPos.y = lastItem.yMin - bound.y;
// bound.x = lastPos.y + halfPadding;
// // lastPos.y = lastItem.rect.yMin - (rect.height - this.padding);
// }
// }
// loopItem.bounds = bound;
// Vector2 pos = rectTran.anchoredPosition;
// pos.y = -bound.x ; // rect.height * .5f ;
// pos = pos + m_ContentInitializePosition; //开始位置
// rectTran.anchoredPosition3D = Vector3.zero;
// rectTran.anchoredPosition = pos;
}
