使用方法：
image.png
具体使用方法，主要就是控制加载和下拉还有上拉状态的控制。然后只需要自己写一个方法实现mLoadData就可以了。
三大脚本如下：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using SuperScrollView;
public enum LoadingTipStatus
{
None,
WaitRelease,
WaitLoad,
Loaded,
NoMore,
Failure
}
public enum RequestState {
None,
Success,
Failure,
NoOne
}
public class UI_PullToRefresh : MonoBehaviour {
public LoopListView2 mLoopListView;
public LoadingTipStatus mLoadingTipStatus = LoadingTipStatus.None;
public RequestState state = RequestState.None;
float mDataLoadedTipShowLeftTime = 0;
float mLoadingTipItemHeight = 100;
public delegate LoopListViewItem2 MLoadData(LoopListView2 listView, LoopListViewItem2 item, int index);
public MLoadData mLoadData;
public delegate void LoadBroadcater(UI_Brdata broadcaster,int index);
public LoadBroadcater mLoadBroadcaster;
public int number = 0;
public int mListItemTotalCount = 0;
public bool isInit = false;
public bool isSuccee = false;
public void OnStart()
{
if (isInit)
{
Refresh();
}
else
{
// totalItemCount +1 because the "pull to refresh" banner is also a item.
mLoopListView.InitListView(number + 2, OnGetItemByIndex);
mLoopListView.mOnBeginDragAction = OnBeginDrag;
mLoopListView.mOnDragingAction = OnDraging;
mLoopListView.mOnEndDragAction = OnEndDrag;
isInit = true;
}
ReSet();
}
/// <summary>
/// 设置刷新状态为None,关闭刷新组件
/// </summary>
public void ReSet()
{
if (mLoopListView.ScrollRect == null)
{
return;
}
//ScrollRect sr = mLoopListView.ScrollRect;
//Vector3 pos = sr.content.localPosition;
//if (pos.y == 0) { return; }
if (mLoadingTipStatus == LoadingTipStatus.None)
{
return;
}
if (mLoadingTipStatus == LoadingTipStatus.WaitLoad)
{
mLoopListView.MovePanelToItemIndex(1, 0);
}
mLoadingTipStatus = LoadingTipStatus.None;
LoopListViewItem2 item = mLoopListView.GetShownItemByItemIndex(0);
if (item == null)
{
return;
}
UpdateLoadingTip(item);
item.CachedRectTransform.localPosition = new Vector3(0, -mLoadingTipItemHeight, 0);
mLoopListView.OnItemSizeChanged(0);
}
public void Refresh() {
isSuccee = true;
mLoopListView.SetListItemCount(number + 2, false);
FinishRefresh();
}
public void Failed() {
SetState(RequestState.Failure);
isSuccee = false;
number = 0;
OnStart();
FinishRefresh();
}
void FinishRefresh()
{
DataSourceMgr.Get.mIsRefreshDataSuccee = true;
LoopListViewItem2 item = mLoopListView.GetShownItemByItemIndex(1);
if (item != null)
{
UpdateLogo(item);
}
}
public void SetState(RequestState state)
{
this.state = state;
}
public void Close()
{
mLoopListView.SetListItemCount(0, false);
}
LoopListViewItem2 OnGetItemByIndex(LoopListView2 listView, int index)
{
if (index < 0 || index > number + 1)
{
return null;
}
LoopListViewItem2 item = null;
if (index == 0)
{
item = listView.NewListViewItem("ItemPrefab0");
UpdateLoadingTip(item);
return item;
}
if (index == 1)
{
item = listView.NewListViewItem("LogoPanel");
UpdateLogo(item);
return item;
}
return mLoadData(listView, item, index);
}
void UpdateLogo(LoopListViewItem2 item)
{
if (item == null)
{
return;
}
GameObject obj = item.gameObject;
if (obj == null)
{
return;
}
if (state == RequestState.None)
{
obj.SetActive(false);
obj.transform.GetChild(0).gameObject.SetActive(false);
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 0);
}
else if (state == RequestState.Success)
{
obj.SetActive(false);
obj.transform.GetChild(0).gameObject.SetActive(false);
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 0);
}
else if (state == RequestState.Failure)
{
obj.SetActive(true);
obj.transform.GetChild(0).gameObject.SetActive(true);
obj.transform.GetChild(0).GetChild(0).transform.GetComponent<Text>().text = "网络错误，下拉刷新数据";
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 0);
}
else if (state == RequestState.NoOne)
{
obj.SetActive(true);
obj.transform.GetChild(0).gameObject.SetActive(true);
obj.transform.GetChild(0).GetChild(0).transform.GetComponent<Text>().text = "你还没有关注任何主播哦~";
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 0);
}
}
void UpdateLoadingTip(LoopListViewItem2 item)
{
if (item == null)
{
return;
}
ListItem0 itemScript0 = item.GetComponent<ListItem0>();
if (itemScript0 == null)
{
return;
}
if (mLoadingTipStatus == LoadingTipStatus.None)
{
itemScript0.mRoot.SetActive(false);
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 0);
}
else if (mLoadingTipStatus == LoadingTipStatus.WaitRelease)
{
itemScript0.mRoot.SetActive(true);
//itemScript0.mText.text = "松开刷新";
//itemScript0.mArrow.SetActive(true);
itemScript0.mWaitingIcon.SetActive(true);
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, mLoadingTipItemHeight);
}
else if (mLoadingTipStatus == LoadingTipStatus.WaitLoad)
{
itemScript0.mRoot.SetActive(true);
// itemScript0.mArrow.SetActive(false);
itemScript0.mWaitingIcon.SetActive(true);
// itemScript0.mText.text = "刷新中";
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, mLoadingTipItemHeight);
}
else if (mLoadingTipStatus == LoadingTipStatus.Loaded)
{
itemScript0.mRoot.SetActive(true);
// itemScript0.mArrow.SetActive(false);
itemScript0.mWaitingIcon.SetActive(true);
// itemScript0.mText.text = "刷新成功";
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, mLoadingTipItemHeight);
}
else if (mLoadingTipStatus == LoadingTipStatus.Failure)
{
itemScript0.mRoot.SetActive(true);
//itemScript0.mArrow.SetActive(false);
itemScript0.mWaitingIcon.SetActive(true);
//itemScript0.mText.text = "刷新失败";
item.CachedRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, mLoadingTipItemHeight);
}
}
void OnBeginDrag()
{
// mLoadingTipStatus = LoadingTipStatus.None;
}
void OnDraging()
{
if (mLoopListView.ShownItemCount == 0)
{
return;
}
if (mLoadingTipStatus != LoadingTipStatus.None && mLoadingTipStatus != LoadingTipStatus.WaitRelease && mLoadingTipStatus != LoadingTipStatus.Failure)
{
return;
}
LoopListViewItem2 item = mLoopListView.GetShownItemByItemIndex(0);
if (item == null)
{
return;
}
ScrollRect sr = mLoopListView.ScrollRect;
Vector3 pos = sr.content.localPosition;
if (pos.y < -mLoadingTipItemHeight)
{
if (mLoadingTipStatus != LoadingTipStatus.None)
{
return;
}
mLoadingTipStatus = LoadingTipStatus.WaitRelease;
UpdateLoadingTip(item);
item.CachedRectTransform.localPosition = new Vector3(0, mLoadingTipItemHeight, 0);
}
else
{
if (mLoadingTipStatus != LoadingTipStatus.WaitRelease)
{
return;
}
mLoadingTipStatus = LoadingTipStatus.None;
UpdateLoadingTip(item);
item.CachedRectTransform.localPosition = new Vector3(0, 0, 0);
}
}
void OnEndDrag()
{
if (mLoopListView.ShownItemCount == 0)
{
return;
}
if (mLoadingTipStatus != LoadingTipStatus.None && mLoadingTipStatus != LoadingTipStatus.WaitRelease)
{
return;
}
LoopListViewItem2 item = mLoopListView.GetShownItemByItemIndex(0);
if (item == null)
{
return;
}
mLoopListView.OnItemSizeChanged(item.ItemIndex);
if (mLoadingTipStatus != LoadingTipStatus.WaitRelease)
{
return;
}
mLoadingTipStatus = LoadingTipStatus.WaitLoad;
UpdateLoadingTip(item);
DataSourceMgr.Get.RequestRefreshDataList(OnDataSourceRefreshFinished);
}
public void ResumeUI() {
mLoopListView.SetListItemCount(number + 2, false);
mLoopListView.RefreshAllShownItem();
}
void OnDataSourceRefreshFinished()
{
if (mLoopListView.ShownItemCount == 0)
{
return;
}
if (mLoadingTipStatus == LoadingTipStatus.WaitLoad)
{
if (isSuccee)
{
mLoadingTipStatus = LoadingTipStatus.Loaded;
}
else
{
mLoadingTipStatus = LoadingTipStatus.Failure;
}
mDataLoadedTipShowLeftTime = 0.7f;
LoopListViewItem2 item = mLoopListView.GetShownItemByItemIndex(0);
if (item == null)
{
return;
}
UpdateLoadingTip(item);
mLoopListView.RefreshAllShownItem();
}
}
void Update()
{
if (mLoopListView.ShownItemCount == 0)
{
return;
}
if (mLoadingTipStatus == LoadingTipStatus.Loaded || mLoadingTipStatus == LoadingTipStatus.Failure)
{
mDataLoadedTipShowLeftTime -= Time.deltaTime;
if (mDataLoadedTipShowLeftTime <= 0)
{
mLoadingTipStatus = LoadingTipStatus.None;
LoopListViewItem2 item = mLoopListView.GetShownItemByItemIndex(0);
if (item == null)
{
return;
}
UpdateLoadingTip(item);
item.CachedRectTransform.localPosition = new Vector3(0, -mLoadingTipItemHeight, 0);
mLoopListView.OnItemSizeChanged(0);
}
}
}
public void Resume()
{
mLoopListView.OnItemSizeChanged(0);
}
}
附上SuperSCrollView 源码。这段代码是核心
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
namespace SuperScrollView
{
public enum ItemCornerEnum
{
LeftBottom = 0,
LeftTop,
RightTop,
RightBottom,
}
public enum ListItemArrangeType
{
TopToBottom,
BottomToTop,
LeftToRight,
RightToLeft,
}
public class ItemPool
{
GameObject mPrefabObj;
string mPrefabName;
int mInitCreateCount = 1;
float mPadding = 0;
float mStartPosOffset = 0;
List<LoopListViewItem2> mTmpPooledItemList = new List<LoopListViewItem2>();
List<LoopListViewItem2> mPooledItemList = new List<LoopListViewItem2>();
static int mCurItemIdCount = 0;
RectTransform mItemParent = null;
public ItemPool()
{
}
public void Init(GameObject prefabObj, float padding,float startPosOffset, int createCount, RectTransform parent)
{
mPrefabObj = prefabObj;
mPrefabName = mPrefabObj.name;
mInitCreateCount = createCount;
mPadding = padding;
mStartPosOffset = startPosOffset;
mItemParent = parent;
mPrefabObj.SetActive(false);
for (int i = 0; i < mInitCreateCount; ++i)
{
LoopListViewItem2 tViewItem = CreateItem();
RecycleItemReal(tViewItem);
}
}
public LoopListViewItem2 GetItem()
{
mCurItemIdCount++;
LoopListViewItem2 tItem = null;
if(mTmpPooledItemList.Count > 0)
{
int count = mTmpPooledItemList.Count;
tItem = mTmpPooledItemList[count - 1];
mTmpPooledItemList.RemoveAt(count - 1);
tItem.gameObject.SetActive(true);
}
else
{
int count = mPooledItemList.Count;
if (count == 0)
{
tItem = CreateItem();
}
else
{
tItem = mPooledItemList[count - 1];
mPooledItemList.RemoveAt(count - 1);
tItem.gameObject.SetActive(true);
}
}
tItem.Padding = mPadding;
tItem.ItemId = mCurItemIdCount;
return tItem;
}
public void DestroyAllItem()
{
ClearTmpRecycledItem();
int count = mPooledItemList.Count;
for (int i = 0;i<count;++i)
{
GameObject.DestroyImmediate(mPooledItemList[i].gameObject);
}
mPooledItemList.Clear();
}
public LoopListViewItem2 CreateItem()
{
GameObject go = GameObject.Instantiate<GameObject>(mPrefabObj, Vector3.zero,Quaternion.identity, mItemParent);
go.SetActive(true);
RectTransform rf = go.GetComponent<RectTransform>();
rf.localScale = Vector3.one;
rf.localPosition = Vector3.zero;
rf.localEulerAngles = Vector3.zero;
LoopListViewItem2 tViewItem = go.GetComponent<LoopListViewItem2>();
tViewItem.ItemPrefabName = mPrefabName;
tViewItem.StartPosOffset = mStartPosOffset;
return tViewItem;
}
void RecycleItemReal(LoopListViewItem2 item)
{
item.gameObject.SetActive(false);
mPooledItemList.Add(item);
}
public void RecycleItem(LoopListViewItem2 item)
{
mTmpPooledItemList.Add(item);
}
public void ClearTmpRecycledItem()
{
int count = mTmpPooledItemList.Count;
if(count == 0)
{
return;
}
for(int i = 0;i<count;++i)
{
RecycleItemReal(mTmpPooledItemList[i]);
}
mTmpPooledItemList.Clear();
}
}
[System.Serializable]
public class ItemPrefabConfData
{
public GameObject mItemPrefab = null;
public float mPadding = 0;
public int mInitCreateCount = 0;
public float mStartPosOffset = 0;
}
public class LoopListViewInitParam
{
// all the default values
public float mDistanceForRecycle0 = 300; //mDistanceForRecycle0 should be larger than mDistanceForNew0
public float mDistanceForNew0 = 200;
public float mDistanceForRecycle1 = 300;//mDistanceForRecycle1 should be larger than mDistanceForNew1
public float mDistanceForNew1 = 200;
public float mSmoothDumpRate = 0.3f;
public float mSnapFinishThreshold = 0.01f;
public float mSnapVecThreshold = 145;
public float mItemDefaultWithPaddingSize = 20;
public static LoopListViewInitParam CopyDefaultInitParam()
{
return new LoopListViewInitParam();
}
}
public enum SnapStatus
{
NoTargetSet = 0,
TargetHasSet = 1,
SnapMoving = 2,
SnapMoveFinish = 3
}
public class LoopListView2 : MonoBehaviour, IBeginDragHandler, IEndDragHandler, IDragHandler
{
class SnapData
{
public SnapStatus mSnapStatus = SnapStatus.NoTargetSet;
public int mSnapTargetIndex = 0;
public float mTargetSnapVal = 0;
public float mCurSnapVal = 0;
public void Clear()
{
mSnapStatus = SnapStatus.NoTargetSet;
}
}
Dictionary<string, ItemPool> mItemPoolDict = new Dictionary<string, ItemPool>();
List<ItemPool> mItemPoolList = new List<ItemPool>();
[SerializeField]
List<ItemPrefabConfData> mItemPrefabDataList = new List<ItemPrefabConfData>();
[SerializeField]
private ListItemArrangeType mArrangeType = ListItemArrangeType.TopToBottom;
public ListItemArrangeType ArrangeType { get { return mArrangeType; } set { mArrangeType = value; } }
List<LoopListViewItem2> mItemList = new List<LoopListViewItem2>();
RectTransform mContainerTrans;
ScrollRect mScrollRect = null;
RectTransform mScrollRectTransform = null;
RectTransform mViewPortRectTransform = null;
float mItemDefaultWithPaddingSize = 20;
int mItemTotalCount = 0;
bool mIsVertList = false;
System.Func<LoopListView2, int, LoopListViewItem2> mOnGetItemByIndex;
Vector3[] mItemWorldCorners = new Vector3[4];
Vector3[] mViewPortRectLocalCorners = new Vector3[4];
int mCurReadyMinItemIndex = 0;
int mCurReadyMaxItemIndex = 0;
bool mNeedCheckNextMinItem = true;
bool mNeedCheckNextMaxItem = true;
ItemPosMgr mItemPosMgr = null;
float mDistanceForRecycle0 = 300;
float mDistanceForNew0 = 200;
float mDistanceForRecycle1 = 300;
float mDistanceForNew1 = 200;
[SerializeField]
bool mSupportScrollBar = true;
bool mIsDraging = false;
PointerEventData mPointerEventData = null;
public System.Action mOnBeginDragAction = null;
public System.Action mOnDragingAction = null;
public System.Action mOnEndDragAction = null;
int mLastItemIndex = 0;
float mLastItemPadding = 0;
float mSmoothDumpVel = 0;
float mSmoothDumpRate = 0.3f;
float mSnapFinishThreshold = 0.1f;
float mSnapVecThreshold = 145;
[SerializeField]
bool mItemSnapEnable = false;
Vector3 mLastFrameContainerPos = Vector3.zero;
public System.Action<LoopListView2,LoopListViewItem2> mOnSnapItemFinished = null;
public System.Action<LoopListView2, LoopListViewItem2> mOnSnapNearestChanged = null;
int mCurSnapNearestItemIndex = -1;
Vector2 mAdjustedVec;
bool mNeedAdjustVec = false;
int mLeftSnapUpdateExtraCount = 1;
[SerializeField]
Vector2 mViewPortSnapPivot = Vector2.zero;
[SerializeField]
Vector2 mItemSnapPivot = Vector2.zero;
ClickEventListener mScrollBarClickEventListener = null;
SnapData mCurSnapData = new SnapData();
Vector3 mLastSnapCheckPos = Vector3.zero;
bool mListViewInited = false;
int mListUpdateCheckFrameCount = 0;
public bool IsVertList
{
get
{
return mIsVertList;
}
}
public int ItemTotalCount
{
get
{
return mItemTotalCount;
}
}
public RectTransform ContainerTrans
{
get
{
return mContainerTrans;
}
}
public ScrollRect ScrollRect
{
get
{
return mScrollRect;
}
}
public bool IsDraging
{
get
{
return mIsDraging;
}
}
public bool ItemSnapEnable
{
get {return mItemSnapEnable;}
set { mItemSnapEnable = value; }
}
public bool SupportScrollBar
{
get { return mSupportScrollBar; }
set { mSupportScrollBar = value; }
}
public ItemPrefabConfData GetItemPrefabConfData(string prefabName)
{
foreach (ItemPrefabConfData data in mItemPrefabDataList)
{
if (data.mItemPrefab == null)
{
Debug.LogError("A item prefab is null ");
continue;
}
if (prefabName == data.mItemPrefab.name)
{
return data;
}
}
return null;
}
public void OnItemPrefabChanged(string prefabName)
{
ItemPrefabConfData data = GetItemPrefabConfData(prefabName);
if(data == null)
{
return;
}
ItemPool pool = null;
if (mItemPoolDict.TryGetValue(prefabName, out pool) == false)
{
return;
}
int firstItemIndex = -1;
Vector3 pos = Vector3.zero;
if(mItemList.Count > 0)
{
firstItemIndex = mItemList[0].ItemIndex;
pos = mItemList[0].CachedRectTransform.localPosition;
}
RecycleAllItem();
ClearAllTmpRecycledItem();
pool.DestroyAllItem();
pool.Init(data.mItemPrefab, data.mPadding, data.mStartPosOffset,data.mInitCreateCount, mContainerTrans);
if(firstItemIndex >= 0)
{
RefreshAllShownItemWithFirstIndexAndPos(firstItemIndex, pos);
}
}
/*
InitListView method is to initiate the LoopListView2 component. There are 3 parameters:
itemTotalCount: the total item count in the listview. If this parameter is set -1, then means there are infinite items, and scrollbar would not be supported, and the ItemIndex can be from –MaxInt to +MaxInt. If this parameter is set a value >=0 , then the ItemIndex can only be from 0 to itemTotalCount -1.
onGetItemByIndex: when a item is getting in the scrollrect viewport, and this Action will be called with the item’ index as a parameter, to let you create the item and update its content.
InitListView方法是启动LoopListView2组件。有三个参数:itemTotalCount:listview中的项目总数。如果该参数设置为- 1，则意味着有无限项，而滚动条不受支持，ItemIndex可以从- MaxInt到+ MaxInt。如果该参数设置值> = 0，则ItemIndex只能从0到itemTotalCount - 1。onGetItemByIndex:当一个条目进入scrollrect viewport时，这个动作将被称为“index作为参数”，让您创建条目并更新它的内容*/
public void InitListView(int itemTotalCount,
System.Func<LoopListView2, int, LoopListViewItem2> onGetItemByIndex,
LoopListViewInitParam initParam = null)
{
if(initParam != null)
{
mDistanceForRecycle0 = initParam.mDistanceForRecycle0;
mDistanceForNew0 = initParam.mDistanceForNew0;
mDistanceForRecycle1 = initParam.mDistanceForRecycle1;
mDistanceForNew1 = initParam.mDistanceForNew1;
mSmoothDumpRate = initParam.mSmoothDumpRate;
mSnapFinishThreshold = initParam.mSnapFinishThreshold;
mSnapVecThreshold = initParam.mSnapVecThreshold;
mItemDefaultWithPaddingSize = initParam.mItemDefaultWithPaddingSize;
}
mScrollRect = gameObject.GetComponent<ScrollRect>();
if (mScrollRect == null)
{
Debug.LogError("ListView Init Failed! ScrollRect component not found!");
return;
}
if(mDistanceForRecycle0 <= mDistanceForNew0)
{
Debug.LogError("mDistanceForRecycle0 should be bigger than mDistanceForNew0");
}
if (mDistanceForRecycle1 <= mDistanceForNew1)
{
Debug.LogError("mDistanceForRecycle1 should be bigger than mDistanceForNew1");
}
mCurSnapData.Clear();
mItemPosMgr = new ItemPosMgr(mItemDefaultWithPaddingSize);
mScrollRectTransform = mScrollRect.GetComponent<RectTransform>();
mContainerTrans = mScrollRect.content;
mViewPortRectTransform = mScrollRect.viewport;
if (mViewPortRectTransform == null)
{
mViewPortRectTransform = mScrollRectTransform;
}
if (mScrollRect.horizontalScrollbarVisibility == ScrollRect.ScrollbarVisibility.AutoHideAndExpandViewport && mScrollRect.horizontalScrollbar != null)
{
Debug.LogError("ScrollRect.horizontalScrollbarVisibility cannot be set to AutoHideAndExpandViewport");
}
if (mScrollRect.verticalScrollbarVisibility == ScrollRect.ScrollbarVisibility.AutoHideAndExpandViewport && mScrollRect.verticalScrollbar != null)
{
Debug.LogError("ScrollRect.verticalScrollbarVisibility cannot be set to AutoHideAndExpandViewport");
}
mIsVertList = (mArrangeType == ListItemArrangeType.TopToBottom || mArrangeType == ListItemArrangeType.BottomToTop);
mScrollRect.horizontal = !mIsVertList;
mScrollRect.vertical = mIsVertList;
SetScrollbarListener();
AdjustPivot(mViewPortRectTransform);
AdjustAnchor(mContainerTrans);
AdjustContainerPivot(mContainerTrans);
InitItemPool();
mOnGetItemByIndex = onGetItemByIndex;
if(mListViewInited == true)
{
Debug.LogError("LoopListView2.InitListView method can be called only once.");
}
mListViewInited = true;
ResetListView();
SetListItemCount(itemTotalCount, true);
}
void SetScrollbarListener()
{
mScrollBarClickEventListener = null;
Scrollbar curScrollBar = null;
if (mIsVertList && mScrollRect.verticalScrollbar != null)
{
curScrollBar = mScrollRect.verticalScrollbar;
}
if (!mIsVertList && mScrollRect.horizontalScrollbar != null)
{
curScrollBar = mScrollRect.horizontalScrollbar;
}
if(curScrollBar == null)
{
return;
}
ClickEventListener listener = ClickEventListener.Get(curScrollBar.gameObject);
mScrollBarClickEventListener = listener;
listener.SetPointerUpHandler(OnPointerUpInScrollBar);
listener.SetPointerDownHandler(OnPointerDownInScrollBar);
}
void OnPointerDownInScrollBar(GameObject obj)
{
mCurSnapData.Clear();
}
void OnPointerUpInScrollBar(GameObject obj)
{
ForceSnapUpdateCheck();
}
public void ResetListView()
{
mViewPortRectTransform.GetLocalCorners(mViewPortRectLocalCorners);
mContainerTrans.localPosition = Vector3.zero;
ForceSnapUpdateCheck();
}
/*
This method may use to set the item total count of the scrollview at runtime.
If this parameter is set -1, then means there are infinite items,
and scrollbar would not be supported, and the ItemIndex can be from –MaxInt to +MaxInt.
If this parameter is set a value >=0 , then the ItemIndex can only be from 0 to itemTotalCount -1.
If resetPos is set false, then the scrollrect’s content position will not changed after this method finished.
此方法可用于在运行时设置scrollview的项目总数。如果这个参数是- 1，那么就意味着有无穷项，滚动条不支持，ItemIndex可以从- MaxInt到+ MaxInt。如果该参数设置值> = 0，则ItemIndex只能从0到itemTotalCount - 1。 如果resetPos设置为false，则在此方法完成后，scrollrect的内容位置将不会改变。
*/
public void SetListItemCount(int itemCount, bool resetPos = true)
{
if(itemCount == mItemTotalCount)
{
return;
}
mCurSnapData.Clear();
mItemTotalCount = itemCount;
if (mItemTotalCount < 0)
{
mSupportScrollBar = false;
}
if (mSupportScrollBar)
{
mItemPosMgr.SetItemMaxCount(mItemTotalCount);
}
else
{
mItemPosMgr.SetItemMaxCount(0);
}
if (mItemTotalCount == 0)
{
mCurReadyMaxItemIndex = 0;
mCurReadyMinItemIndex = 0;
mNeedCheckNextMaxItem = false;
mNeedCheckNextMinItem = false;
RecycleAllItem();
ClearAllTmpRecycledItem();
UpdateContentSize();
return;
}
mLeftSnapUpdateExtraCount = 1;
mNeedCheckNextMaxItem = true;
mNeedCheckNextMinItem = true;
if (resetPos)
{
MovePanelToItemIndex(0, 0);
return;
}
if (mItemList.Count == 0)
{
MovePanelToItemIndex(0, 0);
return;
}
int maxItemIndex = mItemTotalCount - 1;
int lastItemIndex = mItemList[mItemList.Count - 1].ItemIndex;
if (lastItemIndex <= maxItemIndex)
{
UpdateContentSize();
UpdateAllShownItemsPos();
return;
}
MovePanelToItemIndex(maxItemIndex, 0);
}
//To get the visible item by itemIndex. If the item is not visible, then this method return null.
//通过itemIndex获取可见项。如果该项不可见，则此方法返回null。
public LoopListViewItem2 GetShownItemByItemIndex(int itemIndex)
{
int count = mItemList.Count;
// Debug.Log("mItemList[count - 1].ItemIndex :" + mItemList[count - 1].ItemIndex);
if (count == 0)
{
return null;
}
if (itemIndex < mItemList[0].ItemIndex || itemIndex > mItemList[count - 1].ItemIndex)
{
return null;
}
int i = itemIndex - mItemList[0].ItemIndex;
return mItemList[i];
}
public int ShownItemCount
{
get
{
return mItemList.Count;
}
}
public float ViewPortSize
{
get
{
if (mIsVertList)
{
return mViewPortRectTransform.rect.height;
}
else
{
return mViewPortRectTransform.rect.width;
}
}
}
public float ViewPortWidth
{
get { return mViewPortRectTransform.rect.width; }
}
public float ViewPortHeight
{
get { return mViewPortRectTransform.rect.height; }
}
/*
All visible items is stored in a List<LoopListViewItem2> , which is named mItemList;
this method is to get the visible item by the index in visible items list. The parameter index is from 0 to mItemList.Count.
所有可见项都存储在一个列表<LoopListViewItem2>中，它被命名为mItemList;这个方法是通过在可见项列表中的索引获取可见项。参数索引是从0到mItemList.Count。
*/
public LoopListViewItem2 GetShownItemByIndex(int index)
{
int count = mItemList.Count;
if(index < 0 || index >= count)
{
return null;
}
return mItemList[index];
}
public LoopListViewItem2 GetShownItemByIndexWithoutCheck(int index)
{
return mItemList[index];
}
public int GetIndexInShownItemList(LoopListViewItem2 item)
{
if(item == null)
{
return -1;
}
int count = mItemList.Count;
if (count == 0)
{
return -1;
}
for (int i = 0; i < count; ++i)
{
if (mItemList[i] == item)
{
return i;
}
}
return -1;
}
public void DoActionForEachShownItem(System.Action<LoopListViewItem2,object> action,object param)
{
if(action == null)
{
return;
}
int count = mItemList.Count;
if(count == 0)
{
return;
}
for (int i = 0; i < count; ++i)
{
action(mItemList[i],param);
}
}
public LoopListViewItem2 NewListViewItem(string itemPrefabName)
{
ItemPool pool = null;
if (mItemPoolDict.TryGetValue(itemPrefabName, out pool) == false)
{
return null;
}
LoopListViewItem2 item = pool.GetItem();
RectTransform rf = item.GetComponent<RectTransform>();
rf.SetParent(mContainerTrans);
rf.localScale = Vector3.one;
rf.localPosition = Vector3.zero;
rf.localEulerAngles = Vector3.zero;
item.ParentListView = this;
return item;
}
/*
For a vertical scrollrect, when a visible item’s height changed at runtime, then this method should be called to let the LoopListView2 component reposition all visible items’ position.
For a horizontal scrollrect, when a visible item’s width changed at runtime, then this method should be called to let the LoopListView2 component reposition all visible items’ position.
对于垂直scrollrect，当一个可见项的高度在运行时发生变化时，应该调用该方法来让LoopListView2组件重新定位所有可见项的位置。对于水平scrollrect，当一个可见项的宽度在运行时发生变化时，应该调用这个方法，让LoopListView2组件重新定位所有可见项的位置。 */
public void OnItemSizeChanged(int itemIndex)
{
LoopListViewItem2 item = GetShownItemByItemIndex(itemIndex);
if (item == null)
{
return;
}
if (mSupportScrollBar)
{
if (mIsVertList)
{
SetItemSize(itemIndex, item.CachedRectTransform.rect.height, item.Padding);
}
else
{
SetItemSize(itemIndex, item.CachedRectTransform.rect.width, item.Padding);
}
}
UpdateContentSize();
UpdateAllShownItemsPos();
}
/*
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.
按项目索引更新项目。如果不可见itemindex - th项，则此方法将不做任何事情。否则，该方法将首先调用onGetItemByIndex(itemIndex)来获取更新后的项目，然后重新定位所有可见项的位置。
*/
public void RefreshItemByItemIndex(int itemIndex)
{
int count = mItemList.Count;
if (count == 0)
{
return;
}
if (itemIndex < mItemList[0].ItemIndex || itemIndex > mItemList[count - 1].ItemIndex)
{
return;
}
int firstItemIndex = mItemList[0].ItemIndex;
int i = itemIndex - firstItemIndex;
LoopListViewItem2 curItem = mItemList[i];
Vector3 pos = curItem.CachedRectTransform.localPosition;
RecycleItemTmp(curItem);
LoopListViewItem2 newItem = GetNewItemByIndex(itemIndex);
if (newItem == null)
{
RefreshAllShownItemWithFirstIndex(firstItemIndex);
return;
}
mItemList[i] = newItem;
if(mIsVertList)
{
pos.x = newItem.StartPosOffset;
}
else
{
pos.y = newItem.StartPosOffset;
}
newItem.CachedRectTransform.localPosition = pos;
OnItemSizeChanged(itemIndex);
ClearAllTmpRecycledItem();
}
//snap move will finish at once.
public void FinishSnapImmediately()
{
UpdateSnapMove(true);
}
/*
This method will move the scrollrect content’s position to ( the positon of itemIndex-th item + offset ),
and in current version the itemIndex is from 0 to MaxInt, offset is from 0 to scrollrect viewport size.
该方法将把scrollrect内容的位置移动到(itemindex - th项+偏移量的positon)，在当前版本中，itemIndex从0到MaxInt，偏移量从0到scrollrect viewport大小。*/
public void MovePanelToItemIndex(int itemIndex, float offset)
{
mScrollRect.StopMovement();
mCurSnapData.Clear();
if (itemIndex < 0 || mItemTotalCount == 0)
{
return;
}
if (mItemTotalCount > 0 && itemIndex >= mItemTotalCount)
{
itemIndex = mItemTotalCount - 1;
}
if (offset < 0)
{
offset = 0;
}
Vector3 pos = Vector3.zero;
float viewPortSize = ViewPortSize;
if (offset > viewPortSize)
{
offset = viewPortSize;
}
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
float containerPos = mContainerTrans.localPosition.y;
if (containerPos < 0)
{
containerPos = 0;
}
pos.y = -containerPos - offset;
}
else if (mArrangeType == ListItemArrangeType.BottomToTop)
{
float containerPos = mContainerTrans.localPosition.y;
if (containerPos > 0)
{
containerPos = 0;
}
pos.y = -containerPos + offset;
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
float containerPos = mContainerTrans.localPosition.x;
if (containerPos > 0)
{
containerPos = 0;
}
pos.x = -containerPos + offset;
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
float containerPos = mContainerTrans.localPosition.x;
if (containerPos < 0)
{
containerPos = 0;
}
pos.x = -containerPos - offset;
}
RecycleAllItem();
LoopListViewItem2 newItem = GetNewItemByIndex(itemIndex);
if (newItem == null)
{
ClearAllTmpRecycledItem();
return;
}
if (mIsVertList)
{
pos.x = newItem.StartPosOffset;
}
else
{
pos.y = newItem.StartPosOffset;
}
newItem.CachedRectTransform.localPosition = pos;
if (mSupportScrollBar)
{
if (mIsVertList)
{
SetItemSize(itemIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
else
{
SetItemSize(itemIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
}
mItemList.Add(newItem);
UpdateContentSize();
UpdateListView(viewPortSize + 100, viewPortSize + 100, viewPortSize, viewPortSize);
AdjustPanelPos();
ClearAllTmpRecycledItem();
}
//update all visible items.
//更新所有可见的物品。
public void RefreshAllShownItem()
{
int count = mItemList.Count;
if (count == 0)
{
return;
}
RefreshAllShownItemWithFirstIndex(mItemList[0].ItemIndex);
}
public void RefreshAllShownItemWithFirstIndex(int firstItemIndex)
{
int count = mItemList.Count;
if (count == 0)
{
return;
}
LoopListViewItem2 firstItem = mItemList[0];
Vector3 pos = firstItem.CachedRectTransform.localPosition;
RecycleAllItem();
for (int i = 0; i < count; ++i)
{
int curIndex = firstItemIndex + i;
LoopListViewItem2 newItem = GetNewItemByIndex(curIndex);
if (newItem == null)
{
break;
}
if (mIsVertList)
{
pos.x = newItem.StartPosOffset;
}
else
{
pos.y = newItem.StartPosOffset;
}
newItem.CachedRectTransform.localPosition = pos;
if (mSupportScrollBar)
{
if (mIsVertList)
{
SetItemSize(curIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
else
{
SetItemSize(curIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
}
mItemList.Add(newItem);
}
UpdateContentSize();
UpdateAllShownItemsPos();
ClearAllTmpRecycledItem();
}
public void RefreshAllShownItemWithFirstIndexAndPos(int firstItemIndex,Vector3 pos)
{
RecycleAllItem();
LoopListViewItem2 newItem = GetNewItemByIndex(firstItemIndex);
if (newItem == null)
{
return;
}
if (mIsVertList)
{
pos.x = newItem.StartPosOffset;
}
else
{
pos.y = newItem.StartPosOffset;
}
newItem.CachedRectTransform.localPosition = pos;
if (mSupportScrollBar)
{
if (mIsVertList)
{
SetItemSize(firstItemIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
else
{
SetItemSize(firstItemIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
}
mItemList.Add(newItem);
UpdateContentSize();
UpdateAllShownItemsPos();
UpdateListView(mDistanceForRecycle0, mDistanceForRecycle1, mDistanceForNew0, mDistanceForNew1);
ClearAllTmpRecycledItem();
}
void RecycleItemTmp(LoopListViewItem2 item)
{
if (item == null)
{
return;
}
if (string.IsNullOrEmpty(item.ItemPrefabName))
{
return;
}
ItemPool pool = null;
if (mItemPoolDict.TryGetValue(item.ItemPrefabName, out pool) == false)
{
return;
}
pool.RecycleItem(item);
}
public void ClearAllTmpRecycledItem()
{
int count = mItemPoolList.Count;
for(int i = 0;i<count;++i)
{
mItemPoolList[i].ClearTmpRecycledItem();
}
}
public void RecycleAllItem()
{
foreach (LoopListViewItem2 item in mItemList)
{
RecycleItemTmp(item);
}
mItemList.Clear();
}
void AdjustContainerPivot(RectTransform rtf)
{
Vector2 pivot = rtf.pivot;
if (mArrangeType == ListItemArrangeType.BottomToTop)
{
pivot.y = 0;
}
else if (mArrangeType == ListItemArrangeType.TopToBottom)
{
pivot.y = 1;
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
pivot.x = 0;
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
pivot.x = 1;
}
rtf.pivot = pivot;
}
void AdjustPivot(RectTransform rtf)
{
Vector2 pivot = rtf.pivot;
if (mArrangeType == ListItemArrangeType.BottomToTop)
{
pivot.y = 0;
}
else if (mArrangeType == ListItemArrangeType.TopToBottom)
{
pivot.y = 1;
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
pivot.x = 0;
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
pivot.x = 1;
}
rtf.pivot = pivot;
}
void AdjustContainerAnchor(RectTransform rtf)
{
Vector2 anchorMin = rtf.anchorMin;
Vector2 anchorMax = rtf.anchorMax;
if (mArrangeType == ListItemArrangeType.BottomToTop)
{
anchorMin.y = 0;
anchorMax.y = 0;
}
else if (mArrangeType == ListItemArrangeType.TopToBottom)
{
anchorMin.y = 1;
anchorMax.y = 1;
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
anchorMin.x = 0;
anchorMax.x = 0;
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
anchorMin.x = 1;
anchorMax.x = 1;
}
rtf.anchorMin = anchorMin;
rtf.anchorMax = anchorMax;
}
void AdjustAnchor(RectTransform rtf)
{
Vector2 anchorMin = rtf.anchorMin;
Vector2 anchorMax = rtf.anchorMax;
if (mArrangeType == ListItemArrangeType.BottomToTop)
{
anchorMin.y = 0;
anchorMax.y = 0;
}
else if (mArrangeType == ListItemArrangeType.TopToBottom)
{
anchorMin.y = 1;
anchorMax.y = 1;
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
anchorMin.x = 0;
anchorMax.x = 0;
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
anchorMin.x = 1;
anchorMax.x = 1;
}
rtf.anchorMin = anchorMin;
rtf.anchorMax = anchorMax;
}
void InitItemPool()
{
foreach (ItemPrefabConfData data in mItemPrefabDataList)
{
if (data.mItemPrefab == null)
{
Debug.LogError("A item prefab is null ");
continue;
}
string prefabName = data.mItemPrefab.name;
if (mItemPoolDict.ContainsKey(prefabName))
{
Debug.LogError("A item prefab with name " + prefabName + " has existed!");
continue;
}
RectTransform rtf = data.mItemPrefab.GetComponent<RectTransform>();
if (rtf == null)
{
Debug.LogError("RectTransform component is not found in the prefab " + prefabName);
continue;
}
AdjustAnchor(rtf);
AdjustPivot(rtf);
LoopListViewItem2 tItem = data.mItemPrefab.GetComponent<LoopListViewItem2>();
if (tItem == null)
{
data.mItemPrefab.AddComponent<LoopListViewItem2>();
}
ItemPool pool = new ItemPool();
pool.Init(data.mItemPrefab, data.mPadding,data.mStartPosOffset, data.mInitCreateCount, mContainerTrans);
mItemPoolDict.Add(prefabName, pool);
mItemPoolList.Add(pool);
}
}
public virtual void OnBeginDrag(PointerEventData eventData)
{
if (eventData.button != PointerEventData.InputButton.Left)
{
return;
}
mIsDraging = true;
CacheDragPointerEventData(eventData);
mCurSnapData.Clear();
if(mOnBeginDragAction != null)
{
mOnBeginDragAction();
}
}
public virtual void OnEndDrag(PointerEventData eventData)
{
if (eventData.button != PointerEventData.InputButton.Left)
{
return;
}
mIsDraging = false;
mPointerEventData = null;
if (mOnEndDragAction != null)
{
mOnEndDragAction();
}
ForceSnapUpdateCheck();
}
public virtual void OnDrag(PointerEventData eventData)
{
if (eventData.button != PointerEventData.InputButton.Left)
{
return;
}
CacheDragPointerEventData(eventData);
if (mOnDragingAction != null)
{
mOnDragingAction();
}
}
void CacheDragPointerEventData(PointerEventData eventData)
{
if (mPointerEventData == null)
{
mPointerEventData = new PointerEventData(EventSystem.current);
}
mPointerEventData.button = eventData.button;
mPointerEventData.position = eventData.position;
mPointerEventData.pointerPressRaycast = eventData.pointerPressRaycast;
mPointerEventData.pointerCurrentRaycast = eventData.pointerCurrentRaycast;
}
LoopListViewItem2 GetNewItemByIndex(int index)
{
if(mSupportScrollBar && index < 0)
{
return null;
}
if(mItemTotalCount > 0 && index >= mItemTotalCount)
{
return null;
}
LoopListViewItem2 newItem = mOnGetItemByIndex(this, index);
if (newItem == null)
{
return null;
}
newItem.ItemIndex = index;
newItem.ItemCreatedCheckFrameCount = mListUpdateCheckFrameCount;
return newItem;
}
void SetItemSize(int itemIndex, float itemSize,float padding)
{
mItemPosMgr.SetItemSize(itemIndex, itemSize+padding);
if(itemIndex >= mLastItemIndex)
{
mLastItemIndex = itemIndex;
mLastItemPadding = padding;
}
}
void GetPlusItemIndexAndPosAtGivenPos(float pos, ref int index, ref float itemPos)
{
mItemPosMgr.GetItemIndexAndPosAtGivenPos(pos, ref index, ref itemPos);
}
float GetItemPos(int itemIndex)
{
return mItemPosMgr.GetItemPos(itemIndex);
}
public Vector3 GetItemCornerPosInViewPort(LoopListViewItem2 item, ItemCornerEnum corner = ItemCornerEnum.LeftBottom)
{
item.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
return mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[(int)corner]);
}
void AdjustPanelPos()
{
int count = mItemList.Count;
if (count == 0)
{
return;
}
UpdateAllShownItemsPos();
float viewPortSize = ViewPortSize;
float contentSize = GetContentPanelSize();
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
if (contentSize <= viewPortSize)
{
Vector3 pos = mContainerTrans.localPosition;
pos.y = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(mItemList[0].StartPosOffset,0,0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 topPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
if (topPos0.y < mViewPortRectLocalCorners[1].y)
{
Vector3 pos = mContainerTrans.localPosition;
pos.y = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(mItemList[0].StartPosOffset, 0, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 downPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
float d = downPos1.y - mViewPortRectLocalCorners[0].y;
if (d > 0)
{
Vector3 pos = mItemList[0].CachedRectTransform.localPosition;
pos.y = pos.y - d;
mItemList[0].CachedRectTransform.localPosition = pos;
UpdateAllShownItemsPos();
return;
}
}
else if (mArrangeType == ListItemArrangeType.BottomToTop)
{
if (contentSize <= viewPortSize)
{
Vector3 pos = mContainerTrans.localPosition;
pos.y = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(mItemList[0].StartPosOffset, 0, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 downPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
if (downPos0.y > mViewPortRectLocalCorners[0].y)
{
Vector3 pos = mContainerTrans.localPosition;
pos.y = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(mItemList[0].StartPosOffset, 0, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 topPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
float d = mViewPortRectLocalCorners[1].y - topPos1.y;
if (d > 0)
{
Vector3 pos = mItemList[0].CachedRectTransform.localPosition;
pos.y = pos.y + d;
mItemList[0].CachedRectTransform.localPosition = pos;
UpdateAllShownItemsPos();
return;
}
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
if (contentSize <= viewPortSize)
{
Vector3 pos = mContainerTrans.localPosition;
pos.x = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(0,mItemList[0].StartPosOffset, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 leftPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
if (leftPos0.x > mViewPortRectLocalCorners[1].x)
{
Vector3 pos = mContainerTrans.localPosition;
pos.x = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(0, mItemList[0].StartPosOffset, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 rightPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
float d = mViewPortRectLocalCorners[2].x - rightPos1.x;
if (d > 0)
{
Vector3 pos = mItemList[0].CachedRectTransform.localPosition;
pos.x = pos.x + d;
mItemList[0].CachedRectTransform.localPosition = pos;
UpdateAllShownItemsPos();
return;
}
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
if (contentSize <= viewPortSize)
{
Vector3 pos = mContainerTrans.localPosition;
pos.x = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(0, mItemList[0].StartPosOffset, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 rightPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
if (rightPos0.x < mViewPortRectLocalCorners[2].x)
{
Vector3 pos = mContainerTrans.localPosition;
pos.x = 0;
mContainerTrans.localPosition = pos;
mItemList[0].CachedRectTransform.localPosition = new Vector3(0, mItemList[0].StartPosOffset, 0);
UpdateAllShownItemsPos();
return;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 leftPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
float d = leftPos1.x - mViewPortRectLocalCorners[1].x;
if (d > 0)
{
Vector3 pos = mItemList[0].CachedRectTransform.localPosition;
pos.x = pos.x - d;
mItemList[0].CachedRectTransform.localPosition = pos;
UpdateAllShownItemsPos();
return;
}
}
}
void Update()
{
if(mListViewInited == false)
{
return;
}
if(mNeedAdjustVec)
{
mNeedAdjustVec = false;
if(mIsVertList)
{
if(mScrollRect.velocity.y * mAdjustedVec.y > 0)
{
mScrollRect.velocity = mAdjustedVec;
}
}
else
{
if (mScrollRect.velocity.x * mAdjustedVec.x > 0)
{
mScrollRect.velocity = mAdjustedVec;
}
}
}
if (mSupportScrollBar)
{
mItemPosMgr.Update(false);
}
UpdateSnapMove();
UpdateListView(mDistanceForRecycle0, mDistanceForRecycle1, mDistanceForNew0, mDistanceForNew1);
ClearAllTmpRecycledItem();
mLastFrameContainerPos = mContainerTrans.localPosition;
}
//update snap move. if immediate is set true, then the snap move will finish at once.
void UpdateSnapMove(bool immediate = false)
{
if (mItemSnapEnable == false)
{
return;
}
if (mIsVertList)
{
UpdateSnapVertical(immediate);
}
else
{
UpdateSnapHorizontal(immediate);
}
}
public void UpdateAllShownItemSnapData()
{
if (mItemSnapEnable == false)
{
return;
}
int count = mItemList.Count;
if (count == 0)
{
return;
}
Vector3 pos = mContainerTrans.localPosition;
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
float start = 0;
float end = 0;
float itemSnapCenter = 0;
float snapCenter = 0;
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
snapCenter = -(1 - mViewPortSnapPivot.y) * mViewPortRectTransform.rect.height;
Vector3 topPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
start = topPos1.y;
end = start - tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start - tViewItem0.ItemSize * (1 - mItemSnapPivot.y);
for (int i = 0; i < count; ++i)
{
mItemList[i].DistanceWithViewPortSnapCenter = snapCenter - itemSnapCenter;
if ((i + 1) < count)
{
start = end;
end = end - mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start - mItemList[i + 1].ItemSize * (1 - mItemSnapPivot.y);
}
}
}
else if (mArrangeType == ListItemArrangeType.BottomToTop)
{
snapCenter = mViewPortSnapPivot.y * mViewPortRectTransform.rect.height;
Vector3 bottomPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
start = bottomPos1.y;
end = start + tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start + tViewItem0.ItemSize * mItemSnapPivot.y;
for (int i = 0; i < count; ++i)
{
mItemList[i].DistanceWithViewPortSnapCenter = snapCenter - itemSnapCenter;
if ((i + 1) < count)
{
start = end;
end = end + mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start + mItemList[i + 1].ItemSize * mItemSnapPivot.y;
}
}
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
snapCenter = -(1 - mViewPortSnapPivot.x) * mViewPortRectTransform.rect.width;
Vector3 rightPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
start = rightPos1.x;
end = start - tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start - tViewItem0.ItemSize * (1 - mItemSnapPivot.x);
for (int i = 0; i < count; ++i)
{
mItemList[i].DistanceWithViewPortSnapCenter = snapCenter - itemSnapCenter;
if ((i + 1) < count)
{
start = end;
end = end - mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start - mItemList[i + 1].ItemSize * (1 - mItemSnapPivot.x);
}
}
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
snapCenter = mViewPortSnapPivot.x * mViewPortRectTransform.rect.width;
Vector3 leftPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
start = leftPos1.x;
end = start + tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start + tViewItem0.ItemSize * mItemSnapPivot.x;
for (int i = 0; i < count; ++i)
{
mItemList[i].DistanceWithViewPortSnapCenter = snapCenter - itemSnapCenter;
if ((i + 1) < count)
{
start = end;
end = end + mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start + mItemList[i + 1].ItemSize * mItemSnapPivot.x;
}
}
}
}
void UpdateSnapVertical(bool immediate = false)
{
if(mItemSnapEnable == false)
{
return;
}
int count = mItemList.Count;
if (count == 0)
{
return;
}
Vector3 pos = mContainerTrans.localPosition;
bool needCheck = (pos.y != mLastSnapCheckPos.y);
mLastSnapCheckPos = pos;
if (!needCheck)
{
if (mLeftSnapUpdateExtraCount > 0)
{
mLeftSnapUpdateExtraCount--;
needCheck = true;
}
}
if (needCheck)
{
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
int curIndex = -1;
float start = 0;
float end = 0;
float itemSnapCenter = 0;
float curMinDist = float.MaxValue;
float curDist = 0;
float curDistAbs = 0;
float snapCenter = 0;
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
snapCenter = -(1 - mViewPortSnapPivot.y) * mViewPortRectTransform.rect.height;
Vector3 topPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
start = topPos1.y;
end = start - tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start - tViewItem0.ItemSize * (1-mItemSnapPivot.y);
for (int i = 0; i < count; ++i)
{
curDist = snapCenter - itemSnapCenter;
curDistAbs = Mathf.Abs(curDist);
if (curDistAbs < curMinDist)
{
curMinDist = curDistAbs;
curIndex = i;
}
else
{
break;
}
if ((i + 1) < count)
{
start = end;
end = end - mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start - mItemList[i + 1].ItemSize * (1 - mItemSnapPivot.y);
}
}
}
else if(mArrangeType == ListItemArrangeType.BottomToTop)
{
snapCenter = mViewPortSnapPivot.y * mViewPortRectTransform.rect.height;
Vector3 bottomPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
start = bottomPos1.y;
end = start + tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start + tViewItem0.ItemSize * mItemSnapPivot.y;
for (int i = 0; i < count; ++i)
{
curDist = snapCenter - itemSnapCenter;
curDistAbs = Mathf.Abs(curDist);
if (curDistAbs < curMinDist)
{
curMinDist = curDistAbs;
curIndex = i;
}
else
{
break;
}
if ((i + 1) < count)
{
start = end;
end = end + mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start + mItemList[i + 1].ItemSize * mItemSnapPivot.y;
}
}
}
if (curIndex >= 0)
{
int oldNearestItemIndex = mCurSnapNearestItemIndex;
mCurSnapNearestItemIndex = mItemList[curIndex].ItemIndex;
if (mItemList[curIndex].ItemIndex != oldNearestItemIndex)
{
if (mOnSnapNearestChanged != null)
{
mOnSnapNearestChanged(this,mItemList[curIndex]);
}
}
}
else
{
mCurSnapNearestItemIndex = -1;
}
}
bool canSnap = true;
if(mScrollBarClickEventListener != null)
{
canSnap = !(mScrollBarClickEventListener.IsPressd);
}
float v = Mathf.Abs(mScrollRect.velocity.y);
if (canSnap && !mIsDraging && v < mSnapVecThreshold)
{
UpdateCurSnapData();
if (mCurSnapData.mSnapStatus != SnapStatus.SnapMoving)
{
return;
}
if (v > 0)
{
mScrollRect.StopMovement();
}
float old = mCurSnapData.mCurSnapVal;
mCurSnapData.mCurSnapVal = Mathf.SmoothDamp(mCurSnapData.mCurSnapVal, mCurSnapData.mTargetSnapVal, ref mSmoothDumpVel, mSmoothDumpRate);
float dt = mCurSnapData.mCurSnapVal - old;
if (immediate || Mathf.Abs(mCurSnapData.mTargetSnapVal - mCurSnapData.mCurSnapVal) < mSnapFinishThreshold)
{
pos.y = pos.y + mCurSnapData.mTargetSnapVal - mCurSnapData.mCurSnapVal;
mCurSnapData.mSnapStatus = SnapStatus.SnapMoveFinish;
if (mOnSnapItemFinished != null)
{
LoopListViewItem2 targetItem = GetShownItemByItemIndex(mCurSnapNearestItemIndex);
if(targetItem != null)
{
mOnSnapItemFinished(this,targetItem);
}
}
}
else
{
pos.y = pos.y + dt;
}
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
float maxY = mViewPortRectLocalCorners[0].y + mContainerTrans.rect.height;
if (pos.y <= maxY && pos.y >= 0)
{
mContainerTrans.localPosition = pos;
}
}
else if (mArrangeType == ListItemArrangeType.BottomToTop)
{
float minY = mViewPortRectLocalCorners[1].y - mContainerTrans.rect.height;
if (pos.y >= minY && pos.y <= 0)
{
mContainerTrans.localPosition = pos;
}
}
}
}
void UpdateCurSnapData()
{
int count = mItemList.Count;
if (count == 0)
{
mCurSnapData.Clear();
return;
}
if (mCurSnapData.mSnapStatus == SnapStatus.SnapMoving
|| mCurSnapData.mSnapStatus == SnapStatus.SnapMoveFinish)
{
return;
}
if (mCurSnapData.mSnapStatus == SnapStatus.NoTargetSet)
{
LoopListViewItem2 nearestItem = GetShownItemByItemIndex(mCurSnapNearestItemIndex);
if (nearestItem == null)
{
return;
}
mCurSnapData.mSnapTargetIndex = mCurSnapNearestItemIndex;
mCurSnapData.mSnapStatus = SnapStatus.TargetHasSet;
}
if (mCurSnapData.mSnapStatus == SnapStatus.TargetHasSet)
{
LoopListViewItem2 targetItem = GetShownItemByItemIndex(mCurSnapData.mSnapTargetIndex);
if (targetItem == null)
{
mCurSnapData.Clear();
return;
}
UpdateAllShownItemSnapData();
mCurSnapData.mTargetSnapVal = targetItem.DistanceWithViewPortSnapCenter;
mCurSnapData.mCurSnapVal = 0;
mCurSnapData.mSnapStatus = SnapStatus.SnapMoving;
}
}
//Clear current snap target and then the LoopScrollView2 will auto snap to the CurSnapNearestItemIndex.
//清除当前的snap目标，然后LoopScrollView2将自动吸附到cursnapnear estitemindex。
public void ClearSnapData()
{
mCurSnapData.Clear();
}
public void SetSnapTargetItemIndex(int itemIndex)
{
mCurSnapData.mSnapTargetIndex = itemIndex;
mCurSnapData.mSnapStatus = SnapStatus.TargetHasSet;
}
//Get the nearest item index with the viewport snap point.
//使用viewport快照点获取最近的项目索引。
public int CurSnapNearestItemIndex
{
get{ return mCurSnapNearestItemIndex; }
}
public void ForceSnapUpdateCheck()
{
if(mLeftSnapUpdateExtraCount <= 0)
{
mLeftSnapUpdateExtraCount = 1;
}
}
void UpdateSnapHorizontal(bool immediate = false)
{
if (mItemSnapEnable == false)
{
return;
}
int count = mItemList.Count;
if (count == 0)
{
return;
}
Vector3 pos = mContainerTrans.localPosition;
bool needCheck = (pos.x != mLastSnapCheckPos.x);
mLastSnapCheckPos = pos;
if (!needCheck)
{
if(mLeftSnapUpdateExtraCount > 0)
{
mLeftSnapUpdateExtraCount--;
needCheck = true;
}
}
if (needCheck)
{
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
int curIndex = -1;
float start = 0;
float end = 0;
float itemSnapCenter = 0;
float curMinDist = float.MaxValue;
float curDist = 0;
float curDistAbs = 0;
float snapCenter = 0;
if (mArrangeType == ListItemArrangeType.RightToLeft)
{
snapCenter = -(1 - mViewPortSnapPivot.x) * mViewPortRectTransform.rect.width;
Vector3 rightPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
start = rightPos1.x;
end = start - tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start - tViewItem0.ItemSize * (1 - mItemSnapPivot.x);
for (int i = 0; i < count; ++i)
{
curDist = snapCenter - itemSnapCenter;
curDistAbs = Mathf.Abs(curDist);
if (curDistAbs < curMinDist)
{
curMinDist = curDistAbs;
curIndex = i;
}
else
{
break;
}
if ((i + 1) < count)
{
start = end;
end = end - mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start - mItemList[i + 1].ItemSize * (1 - mItemSnapPivot.x);
}
}
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
snapCenter = mViewPortSnapPivot.x * mViewPortRectTransform.rect.width;
Vector3 leftPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
start = leftPos1.x;
end = start + tViewItem0.ItemSizeWithPadding;
itemSnapCenter = start + tViewItem0.ItemSize * mItemSnapPivot.x;
for (int i = 0; i < count; ++i)
{
curDist = snapCenter - itemSnapCenter;
curDistAbs = Mathf.Abs(curDist);
if (curDistAbs < curMinDist)
{
curMinDist = curDistAbs;
curIndex = i;
}
else
{
break;
}
if ((i + 1) < count)
{
start = end;
end = end + mItemList[i + 1].ItemSizeWithPadding;
itemSnapCenter = start + mItemList[i + 1].ItemSize * mItemSnapPivot.x;
}
}
}
if (curIndex >= 0)
{
int oldNearestItemIndex = mCurSnapNearestItemIndex;
mCurSnapNearestItemIndex = mItemList[curIndex].ItemIndex;
if (mItemList[curIndex].ItemIndex != oldNearestItemIndex)
{
if (mOnSnapNearestChanged != null)
{
mOnSnapNearestChanged(this, mItemList[curIndex]);
}
}
}
else
{
mCurSnapNearestItemIndex = -1;
}
}
bool canSnap = true;
if (mScrollBarClickEventListener != null)
{
canSnap = !(mScrollBarClickEventListener.IsPressd);
}
float v = Mathf.Abs(mScrollRect.velocity.x);
if (canSnap && !mIsDraging && v < mSnapVecThreshold)
{
UpdateCurSnapData();
if(mCurSnapData.mSnapStatus != SnapStatus.SnapMoving)
{
return;
}
if (v > 0)
{
mScrollRect.StopMovement();
}
float old = mCurSnapData.mCurSnapVal;
mCurSnapData.mCurSnapVal = Mathf.SmoothDamp(mCurSnapData.mCurSnapVal, mCurSnapData.mTargetSnapVal, ref mSmoothDumpVel, mSmoothDumpRate);
float dt = mCurSnapData.mCurSnapVal - old;
if (immediate || Mathf.Abs(mCurSnapData.mTargetSnapVal - mCurSnapData.mCurSnapVal) < mSnapFinishThreshold)
{
pos.x = pos.x + mCurSnapData.mTargetSnapVal - mCurSnapData.mCurSnapVal;
mCurSnapData.mSnapStatus = SnapStatus.SnapMoveFinish;
if (mOnSnapItemFinished != null)
{
LoopListViewItem2 targetItem = GetShownItemByItemIndex(mCurSnapNearestItemIndex);
if (targetItem != null)
{
mOnSnapItemFinished(this, targetItem);
}
}
}
else
{
pos.x = pos.x + dt;
}
if (mArrangeType == ListItemArrangeType.LeftToRight)
{
float minX = mViewPortRectLocalCorners[2].x - mContainerTrans.rect.width;
if(pos.x >= minX && pos.x <= 0)
{
mContainerTrans.localPosition = pos;
}
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
float maxX = mViewPortRectLocalCorners[1].x + mContainerTrans.rect.width;
if (pos.x <= maxX && pos.x >= 0)
{
mContainerTrans.localPosition = pos;
}
}
}
}
public void UpdateListView(float distanceForRecycle0, float distanceForRecycle1, float distanceForNew0, float distanceForNew1)
{
mListUpdateCheckFrameCount++;
if (mIsVertList)
{
bool needContinueCheck = true;
int checkCount = 0;
int maxCount = 9999;
while (needContinueCheck)
{
checkCount++;
if(checkCount >= maxCount)
{
Debug.LogError("UpdateListView Vertical while loop " + checkCount + " times! something is wrong!");
break;
}
needContinueCheck = UpdateForVertList(distanceForRecycle0, distanceForRecycle1, distanceForNew0, distanceForNew1);
}
}
else
{
bool needContinueCheck = true;
int checkCount = 0;
int maxCount = 9999;
while (needContinueCheck)
{
checkCount++;
if (checkCount >= maxCount)
{
Debug.LogError("UpdateListView Horizontal while loop " + checkCount + " times! something is wrong!");
break;
}
needContinueCheck = UpdateForHorizontalList(distanceForRecycle0, distanceForRecycle1, distanceForNew0, distanceForNew1);
}
}
}
bool UpdateForVertList(float distanceForRecycle0,float distanceForRecycle1,float distanceForNew0, float distanceForNew1)
{
if (mItemTotalCount == 0)
{
if(mItemList.Count > 0)
{
RecycleAllItem();
}
return false;
}
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
int itemListCount = mItemList.Count;
if (itemListCount == 0)
{
float curY = mContainerTrans.localPosition.y;
if (curY < 0)
{
curY = 0;
}
int index = 0;
float pos = -curY;
if (mSupportScrollBar)
{
GetPlusItemIndexAndPosAtGivenPos(curY, ref index, ref pos);
pos = -pos;
}
LoopListViewItem2 newItem = GetNewItemByIndex(index);
if (newItem == null)
{
return false;
}
if (mSupportScrollBar)
{
SetItemSize(index, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
mItemList.Add(newItem);
newItem.CachedRectTransform.localPosition = new Vector3(newItem.StartPosOffset, pos, 0);
UpdateContentSize();
return true;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 topPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 downPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
if (!mIsDraging && tViewItem0.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& downPos0.y - mViewPortRectLocalCorners[1].y > distanceForRecycle0)
{
mItemList.RemoveAt(0);
RecycleItemTmp(tViewItem0);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 topPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 downPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
if (!mIsDraging && tViewItem1.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& mViewPortRectLocalCorners[0].y - topPos1.y > distanceForRecycle1)
{
mItemList.RemoveAt(mItemList.Count - 1);
RecycleItemTmp(tViewItem1);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
if (mViewPortRectLocalCorners[0].y - downPos1.y < distanceForNew1)
{
if(tViewItem1.ItemIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = true;
}
int nIndex = tViewItem1.ItemIndex + 1;
if (nIndex <= mCurReadyMaxItemIndex || mNeedCheckNextMaxItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = false;
CheckIfNeedUpdataItemPos();
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
mItemList.Add(newItem);
float y = tViewItem1.CachedRectTransform.localPosition.y - tViewItem1.CachedRectTransform.rect.height - tViewItem1.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(newItem.StartPosOffset, y, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = nIndex;
}
return true;
}
}
}
if (topPos0.y - mViewPortRectLocalCorners[1].y < distanceForNew0)
{
if(tViewItem0.ItemIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = true;
}
int nIndex = tViewItem0.ItemIndex - 1;
if (nIndex >= mCurReadyMinItemIndex || mNeedCheckNextMinItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = false;
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
mItemList.Insert(0, newItem);
float y = tViewItem0.CachedRectTransform.localPosition.y + newItem.CachedRectTransform.rect.height + newItem.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(newItem.StartPosOffset, y, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = nIndex;
}
return true;
}
}
}
}
else
{
if (mItemList.Count == 0)
{
float curY = mContainerTrans.localPosition.y;
if (curY > 0)
{
curY = 0;
}
int index = 0;
float pos = -curY;
if (mSupportScrollBar)
{
GetPlusItemIndexAndPosAtGivenPos(-curY, ref index, ref pos);
}
LoopListViewItem2 newItem = GetNewItemByIndex(index);
if (newItem == null)
{
return false;
}
if (mSupportScrollBar)
{
SetItemSize(index, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
mItemList.Add(newItem);
newItem.CachedRectTransform.localPosition = new Vector3(newItem.StartPosOffset, pos, 0);
UpdateContentSize();
return true;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 topPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 downPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
if (!mIsDraging && tViewItem0.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& mViewPortRectLocalCorners[0].y - topPos0.y > distanceForRecycle0)
{
mItemList.RemoveAt(0);
RecycleItemTmp(tViewItem0);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 topPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 downPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[0]);
if (!mIsDraging && tViewItem1.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& downPos1.y - mViewPortRectLocalCorners[1].y > distanceForRecycle1)
{
mItemList.RemoveAt(mItemList.Count - 1);
RecycleItemTmp(tViewItem1);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
if (topPos1.y - mViewPortRectLocalCorners[1].y < distanceForNew1)
{
if (tViewItem1.ItemIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = true;
}
int nIndex = tViewItem1.ItemIndex + 1;
if (nIndex <= mCurReadyMaxItemIndex || mNeedCheckNextMaxItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mNeedCheckNextMaxItem = false;
CheckIfNeedUpdataItemPos();
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
mItemList.Add(newItem);
float y = tViewItem1.CachedRectTransform.localPosition.y + tViewItem1.CachedRectTransform.rect.height + tViewItem1.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(newItem.StartPosOffset, y, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = nIndex;
}
return true;
}
}
}
if (mViewPortRectLocalCorners[0].y - downPos0.y < distanceForNew0)
{
if (tViewItem0.ItemIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = true;
}
int nIndex = tViewItem0.ItemIndex - 1;
if (nIndex >= mCurReadyMinItemIndex || mNeedCheckNextMinItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mNeedCheckNextMinItem = false;
return false;
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.height, newItem.Padding);
}
mItemList.Insert(0, newItem);
float y = tViewItem0.CachedRectTransform.localPosition.y - newItem.CachedRectTransform.rect.height - newItem.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(newItem.StartPosOffset, y, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = nIndex;
}
return true;
}
}
}
}
return false;
}
bool UpdateForHorizontalList(float distanceForRecycle0, float distanceForRecycle1, float distanceForNew0, float distanceForNew1)
{
if (mItemTotalCount == 0)
{
if (mItemList.Count > 0)
{
RecycleAllItem();
}
return false;
}
if (mArrangeType == ListItemArrangeType.LeftToRight)
{
if (mItemList.Count == 0)
{
float curX = mContainerTrans.localPosition.x;
if (curX > 0)
{
curX = 0;
}
int index = 0;
float pos = -curX;
if (mSupportScrollBar)
{
GetPlusItemIndexAndPosAtGivenPos(-curX, ref index, ref pos);
}
LoopListViewItem2 newItem = GetNewItemByIndex(index);
if (newItem == null)
{
return false;
}
if (mSupportScrollBar)
{
SetItemSize(index, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
mItemList.Add(newItem);
newItem.CachedRectTransform.localPosition = new Vector3(pos, newItem.StartPosOffset, 0);
UpdateContentSize();
return true;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 leftPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 rightPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
if (!mIsDraging && tViewItem0.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& mViewPortRectLocalCorners[1].x - rightPos0.x > distanceForRecycle0)
{
mItemList.RemoveAt(0);
RecycleItemTmp(tViewItem0);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 leftPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 rightPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
if (!mIsDraging && tViewItem1.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& leftPos1.x - mViewPortRectLocalCorners[2].x> distanceForRecycle1)
{
mItemList.RemoveAt(mItemList.Count - 1);
RecycleItemTmp(tViewItem1);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
if (rightPos1.x - mViewPortRectLocalCorners[2].x < distanceForNew1)
{
if (tViewItem1.ItemIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = true;
}
int nIndex = tViewItem1.ItemIndex + 1;
if (nIndex <= mCurReadyMaxItemIndex || mNeedCheckNextMaxItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = false;
CheckIfNeedUpdataItemPos();
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
mItemList.Add(newItem);
float x = tViewItem1.CachedRectTransform.localPosition.x + tViewItem1.CachedRectTransform.rect.width + tViewItem1.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(x, newItem.StartPosOffset, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = nIndex;
}
return true;
}
}
}
if ( mViewPortRectLocalCorners[1].x - leftPos0.x < distanceForNew0)
{
if (tViewItem0.ItemIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = true;
}
int nIndex = tViewItem0.ItemIndex - 1;
if (nIndex >= mCurReadyMinItemIndex || mNeedCheckNextMinItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = false;
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
mItemList.Insert(0, newItem);
float x = tViewItem0.CachedRectTransform.localPosition.x - newItem.CachedRectTransform.rect.width - newItem.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(x, newItem.StartPosOffset, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = nIndex;
}
return true;
}
}
}
}
else
{
if (mItemList.Count == 0)
{
float curX = mContainerTrans.localPosition.x;
if (curX < 0)
{
curX = 0;
}
int index = 0;
float pos = -curX;
if (mSupportScrollBar)
{
GetPlusItemIndexAndPosAtGivenPos(curX, ref index, ref pos);
pos = -pos;
}
LoopListViewItem2 newItem = GetNewItemByIndex(index);
if (newItem == null)
{
return false;
}
if (mSupportScrollBar)
{
SetItemSize(index, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
mItemList.Add(newItem);
newItem.CachedRectTransform.localPosition = new Vector3(pos, newItem.StartPosOffset, 0);
UpdateContentSize();
return true;
}
LoopListViewItem2 tViewItem0 = mItemList[0];
tViewItem0.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 leftPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 rightPos0 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
if (!mIsDraging && tViewItem0.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& leftPos0.x - mViewPortRectLocalCorners[2].x > distanceForRecycle0)
{
mItemList.RemoveAt(0);
RecycleItemTmp(tViewItem0);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
LoopListViewItem2 tViewItem1 = mItemList[mItemList.Count - 1];
tViewItem1.CachedRectTransform.GetWorldCorners(mItemWorldCorners);
Vector3 leftPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[1]);
Vector3 rightPos1 = mViewPortRectTransform.InverseTransformPoint(mItemWorldCorners[2]);
if (!mIsDraging && tViewItem1.ItemCreatedCheckFrameCount != mListUpdateCheckFrameCount
&& mViewPortRectLocalCorners[1].x - rightPos1.x > distanceForRecycle1)
{
mItemList.RemoveAt(mItemList.Count - 1);
RecycleItemTmp(tViewItem1);
if (!mSupportScrollBar)
{
UpdateContentSize();
CheckIfNeedUpdataItemPos();
}
return true;
}
if (mViewPortRectLocalCorners[1].x - leftPos1.x < distanceForNew1)
{
if (tViewItem1.ItemIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = true;
}
int nIndex = tViewItem1.ItemIndex + 1;
if (nIndex <= mCurReadyMaxItemIndex || mNeedCheckNextMaxItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mCurReadyMaxItemIndex = tViewItem1.ItemIndex;
mNeedCheckNextMaxItem = false;
CheckIfNeedUpdataItemPos();
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
mItemList.Add(newItem);
float x = tViewItem1.CachedRectTransform.localPosition.x - tViewItem1.CachedRectTransform.rect.width - tViewItem1.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(x, newItem.StartPosOffset, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex > mCurReadyMaxItemIndex)
{
mCurReadyMaxItemIndex = nIndex;
}
return true;
}
}
}
if (rightPos0.x - mViewPortRectLocalCorners[2].x < distanceForNew0)
{
if (tViewItem0.ItemIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = true;
}
int nIndex = tViewItem0.ItemIndex - 1;
if (nIndex >= mCurReadyMinItemIndex || mNeedCheckNextMinItem)
{
LoopListViewItem2 newItem = GetNewItemByIndex(nIndex);
if (newItem == null)
{
mCurReadyMinItemIndex = tViewItem0.ItemIndex;
mNeedCheckNextMinItem = false;
}
else
{
if (mSupportScrollBar)
{
SetItemSize(nIndex, newItem.CachedRectTransform.rect.width, newItem.Padding);
}
mItemList.Insert(0, newItem);
float x = tViewItem0.CachedRectTransform.localPosition.x + newItem.CachedRectTransform.rect.width + newItem.Padding;
newItem.CachedRectTransform.localPosition = new Vector3(x, newItem.StartPosOffset, 0);
UpdateContentSize();
CheckIfNeedUpdataItemPos();
if (nIndex < mCurReadyMinItemIndex)
{
mCurReadyMinItemIndex = nIndex;
}
return true;
}
}
}
}
return false;
}
float GetContentPanelSize()
{
if (mSupportScrollBar)
{
float tTotalSize = mItemPosMgr.mTotalSize > 0 ? (mItemPosMgr.mTotalSize - mLastItemPadding) : 0;
if(tTotalSize < 0)
{
tTotalSize = 0;
}
return tTotalSize;
}
int count = mItemList.Count;
if (count == 0)
{
return 0;
}
if (count == 1)
{
return mItemList[0].ItemSize;
}
if (count == 2)
{
return mItemList[0].ItemSizeWithPadding + mItemList[1].ItemSize;
}
float s = 0;
for (int i = 0; i < count - 1; ++i)
{
s += mItemList[i].ItemSizeWithPadding;
}
s += mItemList[count - 1].ItemSize;
return s;
}
void CheckIfNeedUpdataItemPos()
{
int count = mItemList.Count;
if (count == 0)
{
return;
}
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
LoopListViewItem2 firstItem = mItemList[0];
LoopListViewItem2 lastItem = mItemList[mItemList.Count - 1];
float viewMaxY = GetContentPanelSize();
if (firstItem.TopY > 0 || (firstItem.ItemIndex == mCurReadyMinItemIndex && firstItem.TopY != 0))
{
UpdateAllShownItemsPos();
return;
}
if ((-lastItem.BottomY) > viewMaxY || (lastItem.ItemIndex == mCurReadyMaxItemIndex && (-lastItem.BottomY) != viewMaxY))
{
UpdateAllShownItemsPos();
return;
}
}
else if (mArrangeType == ListItemArrangeType.BottomToTop)
{
LoopListViewItem2 firstItem = mItemList[0];
LoopListViewItem2 lastItem = mItemList[mItemList.Count - 1];
float viewMaxY = GetContentPanelSize();
if (firstItem.BottomY < 0 || (firstItem.ItemIndex == mCurReadyMinItemIndex && firstItem.BottomY != 0))
{
UpdateAllShownItemsPos();
return;
}
if (lastItem.TopY > viewMaxY || (lastItem.ItemIndex == mCurReadyMaxItemIndex && lastItem.TopY != viewMaxY))
{
UpdateAllShownItemsPos();
return;
}
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
LoopListViewItem2 firstItem = mItemList[0];
LoopListViewItem2 lastItem = mItemList[mItemList.Count - 1];
float viewMaxX = GetContentPanelSize();
if (firstItem.LeftX < 0 || (firstItem.ItemIndex == mCurReadyMinItemIndex && firstItem.LeftX != 0))
{
UpdateAllShownItemsPos();
return;
}
if ((lastItem.RightX) > viewMaxX || (lastItem.ItemIndex == mCurReadyMaxItemIndex && lastItem.RightX != viewMaxX))
{
UpdateAllShownItemsPos();
return;
}
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
LoopListViewItem2 firstItem = mItemList[0];
LoopListViewItem2 lastItem = mItemList[mItemList.Count - 1];
float viewMaxX = GetContentPanelSize();
if (firstItem.RightX > 0 || (firstItem.ItemIndex == mCurReadyMinItemIndex && firstItem.RightX != 0))
{
UpdateAllShownItemsPos();
return;
}
if ((-lastItem.LeftX) > viewMaxX || (lastItem.ItemIndex == mCurReadyMaxItemIndex && (-lastItem.LeftX) != viewMaxX))
{
UpdateAllShownItemsPos();
return;
}
}
}
void UpdateAllShownItemsPos()
{
int count = mItemList.Count;
if (count == 0)
{
return;
}
mAdjustedVec = (mContainerTrans.localPosition - mLastFrameContainerPos) / Time.deltaTime;
if (mArrangeType == ListItemArrangeType.TopToBottom)
{
float pos = 0;
if (mSupportScrollBar)
{
pos = -GetItemPos(mItemList[0].ItemIndex);
}
float pos1 = mItemList[0].CachedRectTransform.localPosition.y;
float d = pos - pos1;
float curY = pos;
for (int i = 0; i < count; ++i)
{
LoopListViewItem2 item = mItemList[i];
item.CachedRectTransform.localPosition = new Vector3(item.StartPosOffset, curY, 0);
curY = curY - item.CachedRectTransform.rect.height - item.Padding;
}
if(d != 0)
{
Vector2 p = mContainerTrans.localPosition;
p.y = p.y - d;
mContainerTrans.localPosition = p;
}
}
else if(mArrangeType == ListItemArrangeType.BottomToTop)
{
float pos = 0;
if (mSupportScrollBar)
{
pos = GetItemPos(mItemList[0].ItemIndex);
}
float pos1 = mItemList[0].CachedRectTransform.localPosition.y;
float d = pos - pos1;
float curY = pos;
for (int i = 0; i < count; ++i)
{
LoopListViewItem2 item = mItemList[i];
item.CachedRectTransform.localPosition = new Vector3(item.StartPosOffset, curY, 0);
curY = curY + item.CachedRectTransform.rect.height + item.Padding;
}
if(d != 0)
{
Vector3 p = mContainerTrans.localPosition;
p.y = p.y - d;
mContainerTrans.localPosition = p;
}
}
else if (mArrangeType == ListItemArrangeType.LeftToRight)
{
float pos = 0;
if (mSupportScrollBar)
{
pos = GetItemPos(mItemList[0].ItemIndex);
}
float pos1 = mItemList[0].CachedRectTransform.localPosition.x;
float d = pos - pos1;
float curX = pos;
for (int i = 0; i < count; ++i)
{
LoopListViewItem2 item = mItemList[i];
item.CachedRectTransform.localPosition = new Vector3(curX, item.StartPosOffset, 0);
curX = curX + item.CachedRectTransform.rect.width + item.Padding;
}
if (d != 0)
{
Vector3 p = mContainerTrans.localPosition;
p.x = p.x - d;
mContainerTrans.localPosition = p;
}
}
else if (mArrangeType == ListItemArrangeType.RightToLeft)
{
float pos = 0;
if (mSupportScrollBar)
{
pos = -GetItemPos(mItemList[0].ItemIndex);
}
float pos1 = mItemList[0].CachedRectTransform.localPosition.x;
float d = pos - pos1;
float curX = pos;
for (int i = 0; i < count; ++i)
{
LoopListViewItem2 item = mItemList[i];
item.CachedRectTransform.localPosition = new Vector3(curX, item.StartPosOffset, 0);
curX = curX - item.CachedRectTransform.rect.width - item.Padding;
}
if (d != 0)
{
Vector3 p = mContainerTrans.localPosition;
p.x = p.x - d;
mContainerTrans.localPosition = p;
}
}
if (mIsDraging)
{
mScrollRect.OnBeginDrag(mPointerEventData);
mScrollRect.Rebuild(CanvasUpdate.PostLayout);
mScrollRect.velocity = mAdjustedVec;
mNeedAdjustVec = true;
}
}
void UpdateContentSize()
{
float size = GetContentPanelSize();
if (mIsVertList)
{
if(mContainerTrans.rect.height != size)
{
mContainerTrans.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, size);
}
}
else
{
if(mContainerTrans.rect.width != size)
{
mContainerTrans.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, size);
}
}
}
}
}
