All Implemented Interfaces:
```
public class CacheHelper

                    
```
Cache of the item sizes and of the resulting lines (item count, total width etc.), so that com.xiaofeng.flowlayoutmanager.FlowLayoutManager does not have to lay out every item from the beginning when scrolling. Used internally by the layout manager.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description
`public final static int`	`NOT_FOUND`

Constructor Summary

Constructors
Constructor	Description
`CacheHelper(int itemsPerLine, int contentAreaWidth)`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`void`	`add(int startIndex, Array<Point> sizes)`	Add measured items into cache
`void`	`add(int startIndex, int count)`	Make space for {@param count} items
`void`	`invalidSizes(int index, int count)`	Sizes has been changed and new sizes not available yet, just remove them from cache The line map will also be invalidate after the invalidated items
`void`	`remove(int index, int count)`
`void`	`setItem(int index, Point newSize)`
`void`	`move(int from, int to, int count)`	Move items from one place to another.
`Array<int>`	`getLineMap()`
`int`	`itemLineIndex(int itemIndex)`
`Line`	`containingLine(int itemIndex)`
`int`	`firstItemIndex(int lineIndex)`
`Line`	`getLine(int lineIndex)`
`boolean`	`hasPreviousLineCached(int itemIndex)`
`boolean`	`hasNextLineCached(int itemIndex)`
`void`	`clear()`
`void`	`contentAreaWidth(int width)`
`int`	`contentAreaWidth()`
`boolean`	`valid()`
`void`	`startBatchSetting()`
`void`	`endBatchSetting()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CacheHelper

CacheHelper(int itemsPerLine, int contentAreaWidth)

Method Detail

add

 void add(int startIndex, Array<Point> sizes)

Add measured items into cache

add
```
 void add(int startIndex, int count)
```
Make space for {@param count} items

invalidSizes
```
 void invalidSizes(int index, int count)
```
Sizes has been changed and new sizes not available yet, just remove them from cache The line map will also be invalidate after the invalidated items

remove
```
 void remove(int index, int count)
```

setItem

 void setItem(int index, Point newSize)

move
```
 void move(int from, int to, int count)
```
Move items from one place to another. no check on parameter as invoker will make sure it is correct

getLineMap
```
 Array<int> getLineMap()
```

itemLineIndex
```
 int itemLineIndex(int itemIndex)
```

containingLine
```
 Line containingLine(int itemIndex)
```

firstItemIndex
```
 int firstItemIndex(int lineIndex)
```

getLine
```
 Line getLine(int lineIndex)
```

hasPreviousLineCached

 boolean hasPreviousLineCached(int itemIndex)

hasNextLineCached

 boolean hasNextLineCached(int itemIndex)

clear
```
 void clear()
```

contentAreaWidth
```
 void contentAreaWidth(int width)
```

contentAreaWidth
```
 int contentAreaWidth()
```

valid
```
 boolean valid()
```

startBatchSetting
```
 void startBatchSetting()
```

endBatchSetting
```
 void endBatchSetting()
```

Class CacheHelper

Nested Class Summary

Field Summary

Constructor Summary

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CacheHelper

Method Detail

add

add

invalidSizes

remove

setItem

move

getLineMap

itemLineIndex

containingLine

firstItemIndex

getLine

hasPreviousLineCached

hasNextLineCached

clear

contentAreaWidth

contentAreaWidth

valid

startBatchSetting

endBatchSetting