com.chad.library.adapter.base.callback

Class ItemDragAndSwipeCallback

java.lang.Object

ItemTouchHelper.Callback

com.chad.library.adapter.base.callback.ItemDragAndSwipeCallback

public class ItemDragAndSwipeCallback
extends ItemTouchHelper.Callback

Created by luoxw on 2016/6/20.

Constructor Summary

Constructors

Constructor and Description
ItemDragAndSwipeCallback(BaseItemDraggableAdapter adapter)

Method Summary

Modifier and Type	Method and Description
void	clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder)
int	getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder)
float	getMoveThreshold(RecyclerView.ViewHolder viewHolder)
float	getSwipeThreshold(RecyclerView.ViewHolder viewHolder)
boolean	isItemViewSwipeEnabled()
boolean	isLongPressDragEnabled()
void	onChildDrawOver(android.graphics.Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive)
boolean	onMove(RecyclerView recyclerView, RecyclerView.ViewHolder source, RecyclerView.ViewHolder target)
void	onMoved(RecyclerView recyclerView, RecyclerView.ViewHolder source, int fromPos, RecyclerView.ViewHolder target, int toPos, int x, int y)
void	onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState)
void	onSwiped(RecyclerView.ViewHolder viewHolder, int direction)
void	setDragMoveFlags(int dragMoveFlags) Set the drag movement direction.
void	setMoveThreshold(float moveThreshold) Set the fraction that the user should move the View to be considered as it is dragged.
void	setSwipeMoveFlags(int swipeMoveFlags) Set the swipe movement direction.
void	setSwipeThreshold(float swipeThreshold) Set the fraction that the user should move the View to be considered as swiped.

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemDragAndSwipeCallback

public ItemDragAndSwipeCallback(BaseItemDraggableAdapter adapter)

Method Detail

isLongPressDragEnabled

public boolean isLongPressDragEnabled()

isItemViewSwipeEnabled

public boolean isItemViewSwipeEnabled()

onSelectedChanged

public void onSelectedChanged(RecyclerView.ViewHolder viewHolder,
                              int actionState)

clearView

public void clearView(RecyclerView recyclerView,
                      RecyclerView.ViewHolder viewHolder)

getMovementFlags

public int getMovementFlags(RecyclerView recyclerView,
                            RecyclerView.ViewHolder viewHolder)

onMove

public boolean onMove(RecyclerView recyclerView,
                      RecyclerView.ViewHolder source,
                      RecyclerView.ViewHolder target)

onMoved

public void onMoved(RecyclerView recyclerView,
                    RecyclerView.ViewHolder source,
                    int fromPos,
                    RecyclerView.ViewHolder target,
                    int toPos,
                    int x,
                    int y)

onSwiped

public void onSwiped(RecyclerView.ViewHolder viewHolder,
                     int direction)

getMoveThreshold

public float getMoveThreshold(RecyclerView.ViewHolder viewHolder)

getSwipeThreshold

public float getSwipeThreshold(RecyclerView.ViewHolder viewHolder)

setSwipeThreshold

public void setSwipeThreshold(float swipeThreshold)

Set the fraction that the user should move the View to be considered as swiped. The fraction is calculated with respect to RecyclerView's bounds.

Default value is .5f, which means, to swipe a View, user must move the View at least half of RecyclerView's width or height, depending on the swipe direction.

Parameters:

swipeThreshold - A float value that denotes the fraction of the View size. Default value is .8f .

setMoveThreshold

public void setMoveThreshold(float moveThreshold)

Set the fraction that the user should move the View to be considered as it is dragged. After a view is moved this amount, ItemTouchHelper starts checking for Views below it for a possible drop.

Parameters:

moveThreshold - A float value that denotes the fraction of the View size. Default value is .1f .

setDragMoveFlags

public void setDragMoveFlags(int dragMoveFlags)

Set the drag movement direction.

The value should be ItemTouchHelper.UP, ItemTouchHelper.DOWN, ItemTouchHelper.LEFT, ItemTouchHelper.RIGHT or their combination.

You can combine them like ItemTouchHelper.UP | ItemTouchHelper.DOWN, it means that the item could only move up and down when dragged.

Parameters:

dragMoveFlags - the drag movement direction. Default value is ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT.

setSwipeMoveFlags

public void setSwipeMoveFlags(int swipeMoveFlags)

Set the swipe movement direction.

The value should be ItemTouchHelper.START, ItemTouchHelper.END or their combination.

You can combine them like ItemTouchHelper.START | ItemTouchHelper.END, it means that the item could swipe to both left or right.

Parameters:

swipeMoveFlags - the swipe movement direction. Default value is ItemTouchHelper.END.

onChildDrawOver

public void onChildDrawOver(android.graphics.Canvas c,
                            RecyclerView recyclerView,
                            RecyclerView.ViewHolder viewHolder,
                            float dX,
                            float dY,
                            int actionState,
                            boolean isCurrentlyActive)