1 /*
2  * Copyright (C) 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.launcher3.dragndrop;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 
22 import com.android.launcher3.util.TouchController;
23 import com.android.launcher3.views.ActivityContext;
24 import com.android.launcher3.views.BaseDragLayer;
25 
26 /**
27  * A concrete {@link BaseDragLayer} that creates an empty list of {@link TouchController}s.
28  * @param <T> The {@link ActivityContext} hosting the drag layer.
29  */
30 public class SimpleDragLayer<T extends Context & ActivityContext> extends BaseDragLayer<T> {
31 
SimpleDragLayer(Context context, AttributeSet attrs)32     public SimpleDragLayer(Context context, AttributeSet attrs) {
33         this(context, attrs, /*alphaChannelCount= */ 1);
34     }
35 
SimpleDragLayer(Context context, AttributeSet attrs, int alphaChannelCount)36     public SimpleDragLayer(Context context, AttributeSet attrs, int alphaChannelCount) {
37         super(context, attrs, alphaChannelCount);
38     }
39 
40     @Override
recreateControllers()41     public void recreateControllers() {
42         mControllers = new TouchController[] {};
43     }
44 }
45