/*
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* Copyright (C) 2015 Paul Burke
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.ypx.imagepicker.helper.recyclerviewitemhelper;
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import androidx.recyclerview.widget.ItemTouchHelper;
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import androidx.recyclerview.widget.RecyclerView;
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/**
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* Interface to listen for a move or dismissal event from a {@link ItemTouchHelper.Callback}.
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*
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* @author Paul Burke (ipaulpro)
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*/
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public interface ItemTouchHelperAdapter {
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/**
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* Called when an item has been dragged far enough to trigger a move. This is called every time
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* an item is shifted, and <strong>not</strong> at the end of a "drop" event.<br/>
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* <br/>
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* Implementations should call {@link RecyclerView.Adapter#notifyItemMoved(int, int)} after
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* adjusting the underlying data to reflect this move.
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*
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* @param fromPosition The start position of the moved item.
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* @param toPosition Then resolved position of the moved item.
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* @return True if the item was moved to the new adapter position.
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* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
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* @see RecyclerView.ViewHolder#getAdapterPosition()
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*/
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boolean onItemMove(int fromPosition, int toPosition);
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/**
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* Called when an item has been dismissed by a swipe.<br/>
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* <br/>
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* Implementations should call {@link RecyclerView.Adapter#notifyItemRemoved(int)} after
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* adjusting the underlying data to reflect this removal.
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*
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* @param position The position of the item dismissed.
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* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
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* @see RecyclerView.ViewHolder#getAdapterPosition()
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*/
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void onItemDismiss(int position);
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/**
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* 是否可以移动
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*
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* @return
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*/
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boolean isItemViewSwipeEnabled();
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}
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