public bool GetItemIndexAndPosAtGivenPos(float pos, ref int index, ref float itemPos)
{
Update(true);
index = 0;
itemPos = 0f;
int count = mItemSizeGroupList.Count;
if (count == 0)
{
return(true);
}
ItemSizeGroup hitGroup = null;
int low = 0;
int high = count - 1;
if (mItemDefaultSize == 0f)
{
if (mMaxNotEmptyGroupIndex < 0)
{
mMaxNotEmptyGroupIndex = 0;
}
high = mMaxNotEmptyGroupIndex;
}
while (low <= high)
{
int mid = (low + high) / 2;
ItemSizeGroup tGroup = mItemSizeGroupList[mid];
if (tGroup.mGroupStartPos <= pos && tGroup.mGroupEndPos >= pos)
{
hitGroup = tGroup;
break;
}
else if (pos > tGroup.mGroupEndPos)
{
low = mid + 1;
}
else
{
high = mid - 1;
}
}
int hitIndex = -1;
if (hitGroup != null)
{
hitIndex = hitGroup.GetItemIndexByPos(pos - hitGroup.mGroupStartPos);
}
else
{
return(false);
}
if (hitIndex < 0)
{
return(false);
}
index = hitIndex + hitGroup.mGroupIndex * mItemMaxCountPerGroup;
itemPos = hitGroup.GetItemStartPos(hitIndex);
return(true);
}
public void Update(bool updateAll)
{
int count = this.mItemSizeGroupList.Count;
if (count == 0 || this.mDirtyBeginIndex >= count)
{
return;
}
int num = 0;
for (int mDirtyBeginIndex = this.mDirtyBeginIndex; mDirtyBeginIndex < count; ++mDirtyBeginIndex)
{
++num;
ItemSizeGroup mItemSizeGroup = this.mItemSizeGroupList[mDirtyBeginIndex];
++this.mDirtyBeginIndex;
mItemSizeGroup.UpdateAllItemStartPos();
if (mDirtyBeginIndex == 0)
{
mItemSizeGroup.mGroupStartPos = 0.0f;
mItemSizeGroup.mGroupEndPos = mItemSizeGroup.mGroupSize;
}
else
{
mItemSizeGroup.mGroupStartPos = this.mItemSizeGroupList[mDirtyBeginIndex - 1].mGroupEndPos;
mItemSizeGroup.mGroupEndPos = mItemSizeGroup.mGroupStartPos + mItemSizeGroup.mGroupSize;
}
if (!updateAll && num > 1)
{
break;
}
}
}
public bool GetItemIndexAndPosAtGivenPos(float pos, ref int index, ref float itemPos)
{
this.Update(true);
index = 0;
itemPos = 0.0f;
int count = this.mItemSizeGroupList.Count;
if (count == 0)
{
return(true);
}
ItemSizeGroup itemSizeGroup = (ItemSizeGroup)null;
int num1 = 0;
int num2 = count - 1;
if ((double)this.mItemDefaultSize == 0.0)
{
if (this.mMaxNotEmptyGroupIndex < 0)
{
this.mMaxNotEmptyGroupIndex = 0;
}
num2 = this.mMaxNotEmptyGroupIndex;
}
while (num1 <= num2)
{
int index1 = (num1 + num2) / 2;
ItemSizeGroup mItemSizeGroup = this.mItemSizeGroupList[index1];
if ((double)mItemSizeGroup.mGroupStartPos <= (double)pos && (double)mItemSizeGroup.mGroupEndPos >= (double)pos)
{
itemSizeGroup = mItemSizeGroup;
break;
}
if ((double)pos > (double)mItemSizeGroup.mGroupEndPos)
{
num1 = index1 + 1;
}
else
{
num2 = index1 - 1;
}
}
if (itemSizeGroup == null)
{
return(false);
}
int itemIndexByPos = itemSizeGroup.GetItemIndexByPos(pos - itemSizeGroup.mGroupStartPos);
if (itemIndexByPos < 0)
{
return(false);
}
index = itemIndexByPos + itemSizeGroup.mGroupIndex * 100;
itemPos = itemSizeGroup.GetItemStartPos(itemIndexByPos);
return(true);
}
public void GetItemIndexAndPosAtGivenPos(float pos, ref int index, ref float itemPos)
{
this.Update(true);
index = 0;
itemPos = 0f;
int count = this.mItemSizeGroupList.Count;
if (count == 0)
{
return;
}
ItemSizeGroup hitGroup = null;
int low = 0;
int high = count - 1;
while (low <= high)
{
int mid = (low + high) / 2;
ItemSizeGroup tGroup = this.mItemSizeGroupList[mid];
if (tGroup.mGroupStartPos <= pos && tGroup.mGroupEndPos >= pos)
{
hitGroup = tGroup;
break;
}
else if (pos > tGroup.mGroupEndPos)
{
low = mid + 1;
}
else
{
high = mid - 1;
}
}
int hitIndex = -1;
if (hitGroup != null)
{
hitIndex = hitGroup.GetItemIndexByPos(pos - hitGroup.mGroupStartPos);
}
else
{
return;
}
if (hitIndex < 0)
{
return;
}
index = hitIndex + hitGroup.mGroupIndex * mItemMaxCountPerGroup;
itemPos = hitGroup.GetItemStartPos(hitIndex);
}
public void SetItemSize(int itemIndex, float size)
{
int groupIndex = itemIndex / mItemMaxCountPerGroup;
int indexInGroup = itemIndex % mItemMaxCountPerGroup;
ItemSizeGroup tGroup = this.mItemSizeGroupList[groupIndex];
float changedSize = tGroup.SetItemSize(indexInGroup, size);
if (changedSize != 0f)
{
if (groupIndex < this.mDirtyBeginIndex)
{
this.mDirtyBeginIndex = groupIndex;
}
}
this.mTotalSize += changedSize;
}
public void SetItemMaxCount(int maxCount)
{
this.mDirtyBeginIndex = 0;
this.mTotalSize = 0;
int st = maxCount % mItemMaxCountPerGroup;
int lastGroupItemCount = st;
int needMaxGroupCount = maxCount / mItemMaxCountPerGroup;
if (st > 0)
{
needMaxGroupCount++;
}
else
{
lastGroupItemCount = mItemMaxCountPerGroup;
}
int count = this.mItemSizeGroupList.Count;
if (count > needMaxGroupCount)
{
int d = count - needMaxGroupCount;
this.mItemSizeGroupList.RemoveRange(needMaxGroupCount, d);
}
else if (count < needMaxGroupCount)
{
int d = needMaxGroupCount - count;
for (int i = 0; i < d; ++i)
{
ItemSizeGroup tGroup = new ItemSizeGroup(count + i, this.mItemDefaultSize);
this.mItemSizeGroupList.Add(tGroup);
}
}
count = this.mItemSizeGroupList.Count;
if (count == 0)
{
return;
}
for (int i = 0; i < count - 1; ++i)
{
this.mItemSizeGroupList[i].SetItemCount(mItemMaxCountPerGroup);
}
this.mItemSizeGroupList[count - 1].SetItemCount(lastGroupItemCount);
for (int i = 0; i < count; ++i)
{
this.mTotalSize = this.mTotalSize + this.mItemSizeGroupList[i].mGroupSize;
}
}
public void SetItemSize(int itemIndex, float size)
{
int groupIndex = itemIndex / mItemMaxCountPerGroup;
int indexInGroup = itemIndex % mItemMaxCountPerGroup;
ItemSizeGroup tGroup = mItemSizeGroupList[groupIndex];
float changedSize = tGroup.SetItemSize(indexInGroup, size);
if (changedSize != 0f)
{
if (groupIndex < mDirtyBeginIndex)
{
mDirtyBeginIndex = groupIndex;
}
}
mTotalSize += changedSize;
if (groupIndex > mMaxNotEmptyGroupIndex && size > 0)
{
mMaxNotEmptyGroupIndex = groupIndex;
}
}
//根据总Item索引设置size大小
public void SetItemSize(int itemIndex, float size)
{
int groupIndex = itemIndex / mItemMaxCountPerGroup; //Item所在组的索引
int indexInGroup = itemIndex % mItemMaxCountPerGroup; //在组内的索引
ItemSizeGroup tGroup = mItemSizeGroupList[groupIndex];
float changedSize = tGroup.SetItemSize(indexInGroup, size); //更新总索引为itemIndex出的数据-》size，并返回新的Item大小减去之前的大小的差值
if (changedSize != 0f)
{
if (groupIndex < mDirtyBeginIndex)
{//更新
mDirtyBeginIndex = groupIndex;
}
}
mTotalSize += changedSize;//更新大小
if (groupIndex > mMaxNotEmptyGroupIndex && size > 0)
{
//更新最大不为空的组在链表中的索引
mMaxNotEmptyGroupIndex = groupIndex;
}
}
public void Update(bool updateAll)
{
int count = mItemSizeGroupList.Count;
if (count == 0)
{
return;
}
if (mDirtyBeginIndex >= count)
{
return;
}
int loopCount = 0;
for (int i = mDirtyBeginIndex; i < count; ++i)
{
loopCount++;
ItemSizeGroup tGroup = mItemSizeGroupList[i];
mDirtyBeginIndex++;
tGroup.UpdateAllItemStartPos();
if (i == 0)
{
tGroup.mGroupStartPos = 0;
tGroup.mGroupEndPos = tGroup.mGroupSize;
}
else
{
tGroup.mGroupStartPos = mItemSizeGroupList[i - 1].mGroupEndPos;
tGroup.mGroupEndPos = tGroup.mGroupStartPos + tGroup.mGroupSize;
}
if (!updateAll && loopCount > 1)
{
return;
}
}
}
public void SetItemMaxCount(int maxCount)
{
mDirtyBeginIndex = 0;
mTotalSize = 0;
int st = maxCount % mItemMaxCountPerGroup;
int lastGroupItemCount = st;
int needMaxGroupCount = maxCount / mItemMaxCountPerGroup;
if (st > 0)
{
needMaxGroupCount++;
}
else
{
lastGroupItemCount = mItemMaxCountPerGroup;
}
int count = mItemSizeGroupList.Count;
if (count > needMaxGroupCount)
{
int d = count - needMaxGroupCount;
mItemSizeGroupList.RemoveRange(needMaxGroupCount, d);
}
else if (count < needMaxGroupCount)
{
if (count > 0)
{
mItemSizeGroupList[count - 1].ClearOldData();
}
int d = needMaxGroupCount - count;
for (int i = 0; i < d; ++i)
{
ItemSizeGroup tGroup = new ItemSizeGroup(count + i, mItemDefaultSize);
mItemSizeGroupList.Add(tGroup);
}
}
else
{
if (count > 0)
{
mItemSizeGroupList[count - 1].ClearOldData();
}
}
count = mItemSizeGroupList.Count;
if ((count - 1) < mMaxNotEmptyGroupIndex)
{
mMaxNotEmptyGroupIndex = count - 1;
}
if (mMaxNotEmptyGroupIndex < 0)
{
mMaxNotEmptyGroupIndex = 0;
}
if (count == 0)
{
return;
}
for (int i = 0; i < count - 1; ++i)
{
mItemSizeGroupList[i].SetItemCount(mItemMaxCountPerGroup);
}
mItemSizeGroupList[count - 1].SetItemCount(lastGroupItemCount);
for (int i = 0; i < count; ++i)
{
mTotalSize = mTotalSize + mItemSizeGroupList[i].mGroupSize;
}
}
//设置Item最大数量
public void SetItemMaxCount(int maxCount)
{
mDirtyBeginIndex = 0;
mTotalSize = 0;
int st = maxCount % mItemMaxCountPerGroup;
int lastGroupItemCount = st; //最后一组Itme计数
int needMaxGroupCount = maxCount / mItemMaxCountPerGroup; //需要的最大组数
if (st > 0)
{
needMaxGroupCount++;
}
else
{
lastGroupItemCount = mItemMaxCountPerGroup;
}
int count = mItemSizeGroupList.Count;
if (count > needMaxGroupCount)
{//如果组节点链表的数量大于所需要的数量，则把链表后面不需要的删除
int d = count - needMaxGroupCount;
mItemSizeGroupList.RemoveRange(needMaxGroupCount, d);
}
else if (count < needMaxGroupCount)
{//如果组链表节点数量小于所需要的数量，则把已有链表中最后一个组的多余大小元素归零，并在链表中添加所需的组数的节点
if (count > 0)
{
mItemSizeGroupList[count - 1].ClearOldData();
}
int d = needMaxGroupCount - count;
for (int i = 0; i < d; ++i)
{
ItemSizeGroup tGroup = new ItemSizeGroup(count + i, mItemDefaultSize);
mItemSizeGroupList.Add(tGroup);
}
}
else
{
//如果组链表的节点数量等于所需要的组数，则把最后一组的多余大小元素归零
if (count > 0)
{
mItemSizeGroupList[count - 1].ClearOldData();
}
}
count = mItemSizeGroupList.Count;
if ((count - 1) < mMaxNotEmptyGroupIndex)
{//设置最大不为空节点的索引
mMaxNotEmptyGroupIndex = count - 1;
}
if (mMaxNotEmptyGroupIndex < 0)
{
mMaxNotEmptyGroupIndex = 0;
}
if (count == 0)
{
return;
}
for (int i = 0; i < count - 1; ++i)
{
//设置每组的Item的数量
mItemSizeGroupList[i].SetItemCount(mItemMaxCountPerGroup);
}
mItemSizeGroupList[count - 1].SetItemCount(lastGroupItemCount);
for (int i = 0; i < count; ++i)
{
//设置总大小
mTotalSize = mTotalSize + mItemSizeGroupList[i].mGroupSize;
}
}
