| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 com.android.internal.widget.helper; |
| |
| import android.graphics.Canvas; |
| import android.view.View; |
| |
| import com.android.internal.widget.RecyclerView; |
| |
| /** |
| * Utility class for {@link ItemTouchHelper} which handles item transformations for different |
| * API versions. |
| * <p/> |
| * This class has methods that map to {@link ItemTouchHelper.Callback}'s drawing methods. Default |
| * implementations in {@link ItemTouchHelper.Callback} call these methods with |
| * {@link RecyclerView.ViewHolder#itemView} and {@link ItemTouchUIUtil} makes necessary changes |
| * on the View depending on the API level. You can access the instance of {@link ItemTouchUIUtil} |
| * via {@link ItemTouchHelper.Callback#getDefaultUIUtil()} and call its methods with the children |
| * of ViewHolder that you want to apply default effects. |
| * |
| * @see ItemTouchHelper.Callback#getDefaultUIUtil() |
| */ |
| public interface ItemTouchUIUtil { |
| |
| /** |
| * The default implementation for {@link ItemTouchHelper.Callback#onChildDraw(Canvas, |
| * RecyclerView, RecyclerView.ViewHolder, float, float, int, boolean)} |
| */ |
| void onDraw(Canvas c, RecyclerView recyclerView, View view, |
| float dX, float dY, int actionState, boolean isCurrentlyActive); |
| |
| /** |
| * The default implementation for {@link ItemTouchHelper.Callback#onChildDrawOver(Canvas, |
| * RecyclerView, RecyclerView.ViewHolder, float, float, int, boolean)} |
| */ |
| void onDrawOver(Canvas c, RecyclerView recyclerView, View view, |
| float dX, float dY, int actionState, boolean isCurrentlyActive); |
| |
| /** |
| * The default implementation for {@link ItemTouchHelper.Callback#clearView(RecyclerView, |
| * RecyclerView.ViewHolder)} |
| */ |
| void clearView(View view); |
| |
| /** |
| * The default implementation for {@link ItemTouchHelper.Callback#onSelectedChanged( |
| * RecyclerView.ViewHolder, int)} |
| */ |
| void onSelected(View view); |
| } |
| |