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.systemui.navigationbar.gestural;
18 
19 import android.content.Context;
20 import android.graphics.Canvas;
21 import android.graphics.RectF;
22 import android.view.Surface;
23 
24 import com.android.systemui.res.R;
25 
26 /** Temporarily shown view when using QuickSwitch to switch between apps of different rotations */
27 public class QuickswitchOrientedNavHandle extends NavigationHandle {
28     private final int mWidth;
29     private final RectF mTmpBoundsRectF = new RectF();
30     private @Surface.Rotation int mDeltaRotation;
31 
QuickswitchOrientedNavHandle(Context context)32     public QuickswitchOrientedNavHandle(Context context) {
33         super(context);
34         mWidth = context.getResources().getDimensionPixelSize(R.dimen.navigation_home_handle_width);
35     }
36 
setDeltaRotation(@urface.Rotation int rotation)37     public void setDeltaRotation(@Surface.Rotation int rotation) {
38         mDeltaRotation = rotation;
39     }
40 
41     @Override
onDraw(Canvas canvas)42     protected void onDraw(Canvas canvas) {
43         canvas.drawRoundRect(computeHomeHandleBounds(), mRadius, mRadius, mPaint);
44     }
45 
computeHomeHandleBounds()46     public RectF computeHomeHandleBounds() {
47         float left;
48         float top;
49         float bottom;
50         float right;
51         float radiusOffset = mRadius * 2;
52         int topStart = getLocationOnScreen()[1];
53 
54         switch (mDeltaRotation) {
55             default:
56             case Surface.ROTATION_0:
57             case Surface.ROTATION_180:
58                 float height = mRadius * 2;
59                 left = getWidth() / 2f - mWidth / 2f;
60                 top = (getHeight() - mBottom - height);
61                 right = getWidth() / 2f + mWidth / 2f;
62                 bottom = top + height;
63                 break;
64             case Surface.ROTATION_90:
65                 left = mBottom;
66                 right = left + radiusOffset;
67                 top = getHeight() / 2f - (mWidth / 2f) - (topStart / 2f);
68                 bottom = top + mWidth;
69                 break;
70             case Surface.ROTATION_270:
71                 right = getWidth() - mBottom;
72                 left = right - radiusOffset;
73                 top = getHeight() / 2f - (mWidth / 2f) - (topStart / 2f);
74                 bottom = top + mWidth;
75                 break;
76         }
77         mTmpBoundsRectF.set(left, top, right, bottom);
78         return mTmpBoundsRectF;
79     }
80 }
81