1 /*
2  * Copyright (C) 2016 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.dialer.util;
18 
19 import android.graphics.Point;
20 
21 /**
22  * Singleton class to keep track of where the user last touched the screen.
23  *
24  * <p>Used to pass on to the InCallUI for animation.
25  */
26 public class TouchPointManager {
27 
28   public static final String TOUCH_POINT = "touchPoint";
29 
30   private static TouchPointManager instance = new TouchPointManager();
31 
32   private Point point = new Point();
33 
34   /** Private constructor. Instance should only be acquired through getRunningInstance(). */
TouchPointManager()35   private TouchPointManager() {}
36 
getInstance()37   public static TouchPointManager getInstance() {
38     return instance;
39   }
40 
getPoint()41   public Point getPoint() {
42     return point;
43   }
44 
setPoint(int x, int y)45   public void setPoint(int x, int y) {
46     point.set(x, y);
47   }
48 
49   /**
50    * When a point is initialized, its value is (0,0). Since it is highly unlikely a user will touch
51    * at that exact point, if the point in TouchPointManager is (0,0), it is safe to assume that the
52    * TouchPointManager has not yet collected a touch.
53    *
54    * @return True if there is a valid point saved. Define a valid point as any point that is not
55    *     (0,0).
56    */
hasValidPoint()57   public boolean hasValidPoint() {
58     return point.x != 0 || point.y != 0;
59   }
60 }
61