1 /*
2  * Copyright (C) 2020 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.wm.shell.common;
18 
19 import android.graphics.Outline;
20 import android.graphics.Path;
21 import android.graphics.drawable.shapes.PathShape;
22 
23 import androidx.annotation.NonNull;
24 
25 /**
26  * Wrapper around {@link PathShape}
27  * that creates a shape with a triangular path (pointing up or down).
28  *
29  * This is the copy from SystemUI/recents.
30  */
31 public class TriangleShape extends PathShape {
32     private Path mTriangularPath;
33 
TriangleShape(Path path, float stdWidth, float stdHeight)34     public TriangleShape(Path path, float stdWidth, float stdHeight) {
35         super(path, stdWidth, stdHeight);
36         mTriangularPath = path;
37     }
38 
create(float width, float height, boolean isPointingUp)39     public static TriangleShape create(float width, float height, boolean isPointingUp) {
40         Path triangularPath = new Path();
41         if (isPointingUp) {
42             triangularPath.moveTo(0, height);
43             triangularPath.lineTo(width, height);
44             triangularPath.lineTo(width / 2, 0);
45             triangularPath.close();
46         } else {
47             triangularPath.moveTo(0, 0);
48             triangularPath.lineTo(width / 2, height);
49             triangularPath.lineTo(width, 0);
50             triangularPath.close();
51         }
52         return new TriangleShape(triangularPath, width, height);
53     }
54 
55     /** Create an arrow TriangleShape that points to the left or the right */
createHorizontal( float width, float height, boolean isPointingLeft)56     public static TriangleShape createHorizontal(
57             float width, float height, boolean isPointingLeft) {
58         Path triangularPath = new Path();
59         if (isPointingLeft) {
60             triangularPath.moveTo(0, height / 2);
61             triangularPath.lineTo(width, height);
62             triangularPath.lineTo(width, 0);
63             triangularPath.close();
64         } else {
65             triangularPath.moveTo(0, height);
66             triangularPath.lineTo(width, height / 2);
67             triangularPath.lineTo(0, 0);
68             triangularPath.close();
69         }
70         return new TriangleShape(triangularPath, width, height);
71     }
72 
73     @Override
getOutline(@onNull Outline outline)74     public void getOutline(@NonNull Outline outline) {
75         outline.setPath(mTriangularPath);
76     }
77 }
78