com.mikepenz.fastadapter.utils

Class AdapterUtil

java.lang.Object

com.mikepenz.fastadapter.utils.AdapterUtil

public class AdapterUtil
extends java.lang.Object

Created by mikepenz on 31.12.15.

Constructor Summary

Constructors

Constructor and Description
AdapterUtil()

Method Summary

Modifier and Type	Method and Description
static <Item extends IItem> void	addAllSubItems(Item item, java.util.List<Item> items) Gets all subItems from a given parent item
static java.util.Set<java.lang.Integer>	adjustPosition(java.util.Set<java.lang.Integer> positions, int startPosition, int endPosition, int adjustBy) internal method to handle the selections if items are added / removed
static android.util.SparseIntArray	adjustPosition(android.util.SparseIntArray positions, int startPosition, int endPosition, int adjustBy) internal method to handle the selections if items are added / removed
static <Item extends IItem> void	findSubItemSelections(Item item, java.util.List<java.lang.String> selections) internal method to find all selections from subItems and sub sub items so we can save those inside our savedInstanceState
static <Item extends IItem> java.util.List<Item>	getAllItems(FastAdapter<Item> fastAdapter) Gets all items (including sub items) from the FastAdapter
static <Item extends IItem> void	handleStates(FastAdapter<Item> fastAdapter, int startPosition, int endPosition) internal method which correctly set the selected state and expandable state on the newly added items
static <Item extends IItem> void	restoreSubItemSelectionStatesForAlternativeStateManagement(Item item, java.util.List<java.lang.String> selectedItems) internal method to restore the selection state of subItems

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AdapterUtil

public AdapterUtil()

Method Detail

handleStates

public static <Item extends IItem> void handleStates(FastAdapter<Item> fastAdapter,
                                                     int startPosition,
                                                     int endPosition)

internal method which correctly set the selected state and expandable state on the newly added items

Parameters:

fastAdapter - the fastAdapter which manages everything

startPosition - the position of the first item to handle

endPosition - the position of the last item to handle

adjustPosition

public static java.util.Set<java.lang.Integer> adjustPosition(java.util.Set<java.lang.Integer> positions,
                                                              int startPosition,
                                                              int endPosition,
                                                              int adjustBy)

internal method to handle the selections if items are added / removed

Parameters:

positions - the positions map which should be adjusted

startPosition - the global index of the first element modified

endPosition - the global index up to which the modification changed the indices (should be MAX_INT if we check til the end)

adjustBy - the value by which the data was shifted

Returns:

the adjusted set

adjustPosition

public static android.util.SparseIntArray adjustPosition(android.util.SparseIntArray positions,
                                                         int startPosition,
                                                         int endPosition,
                                                         int adjustBy)

internal method to handle the selections if items are added / removed

Parameters:

positions - the positions map which should be adjusted

startPosition - the global index of the first element modified

endPosition - the global index up to which the modification changed the indices (should be MAX_INT if we check til the end)

adjustBy - the value by which the data was shifted

Returns:

the adjusted map

restoreSubItemSelectionStatesForAlternativeStateManagement

public static <Item extends IItem> void restoreSubItemSelectionStatesForAlternativeStateManagement(Item item,
                                                                                                   java.util.List<java.lang.String> selectedItems)

internal method to restore the selection state of subItems

Parameters:

item - the parent item

selectedItems - the list of selectedItems from the savedInstanceState

findSubItemSelections

public static <Item extends IItem> void findSubItemSelections(Item item,
                                                              java.util.List<java.lang.String> selections)

internal method to find all selections from subItems and sub sub items so we can save those inside our savedInstanceState

Parameters:

item - the parent item

selections - the ArrayList which will be stored in the savedInstanceState

getAllItems

public static <Item extends IItem> java.util.List<Item> getAllItems(FastAdapter<Item> fastAdapter)

Gets all items (including sub items) from the FastAdapter

Parameters:

fastAdapter - the FastAdapter

Returns:

a list of all items including the whole subItem hirachy

addAllSubItems

public static <Item extends IItem> void addAllSubItems(Item item,
                                                       java.util.List<Item> items)

Gets all subItems from a given parent item

Parameters:

item - the parent from which we add all items

items - the list in which we add the subItems