ReverseLinearLayout.java revision a20818257e6927560a676d99dbc563a0394f74d8 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5 * except in compliance with the License. You may obtain a copy of the License at
6 *
7 *      http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the
10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11 * KIND, either express or implied. See the License for the specific language governing
12 * permissions and limitations under the License.
13 */
14
15package com.android.systemui.statusbar.phone;
16
17import android.annotation.Nullable;
18import android.content.Context;
19import android.util.AttributeSet;
20import android.view.View;
21import android.view.ViewGroup;
22import android.widget.LinearLayout;
23
24/**
25 * Automatically reverses the order of children as they are added.
26 * Also reverse the width and height values of layout params
27 */
28public class ReverseLinearLayout extends LinearLayout {
29
30    public ReverseLinearLayout(Context context, @Nullable AttributeSet attrs) {
31        super(context, attrs);
32    }
33
34    @Override
35    public void addView(View child) {
36        reversParams(child.getLayoutParams());
37        super.addView(child, 0);
38    }
39
40    @Override
41    public void addView(View child, ViewGroup.LayoutParams params) {
42        reversParams(params);
43        super.addView(child, 0, params);
44    }
45
46    private void reversParams(ViewGroup.LayoutParams params) {
47        if (params == null) {
48            return;
49        }
50        int width = params.width;
51        params.width = params.height;
52        params.height = width;
53    }
54
55}
56