/*
* Copyright (C) 2015 Paul Burke
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sufficientlysecure.keychain.ui.util.recyclerview;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.helper.ItemTouchHelper;
/**
* Interface to listen for a move or dismissal event from a {@link ItemTouchHelper.Callback}.
*/
public interface ItemTouchHelperAdapter {
/**
* Called when an item has been dragged far enough to trigger a move. This is called every time
* an item is shifted, and not at the end of a "drop" event.
*
* Implementations should call {@link RecyclerView.Adapter#notifyItemMoved(int, int)} after
* adjusting the underlying data to reflect this move.
*
* @param fromPosition The start position of the moved item.
* @param toPosition Then resolved position of the moved item.
* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
* @see RecyclerView.ViewHolder#getAdapterPosition()
*/
void onItemMove(RecyclerView.ViewHolder source, RecyclerView.ViewHolder target,
int fromPosition, int toPosition);
}