1/*
2 * Copyright (C) 2015 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
17package com.android.systemui.volume;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.util.ArrayMap;
22import android.util.TypedValue;
23import android.view.View;
24import android.view.View.OnAttachStateChangeListener;
25import android.widget.TextView;
26
27/**
28 * Class for updating textviews on configuration change.
29 */
30public class ConfigurableTexts {
31
32    private final Context mContext;
33    private final ArrayMap<TextView, Integer> mTexts = new ArrayMap<>();
34    private final ArrayMap<TextView, Integer> mTextLabels = new ArrayMap<>();
35
36    public ConfigurableTexts(Context context) {
37        mContext = context;
38    }
39
40    public int add(final TextView text) {
41        return add(text, -1);
42    }
43
44    public int add(final TextView text, final int labelResId) {
45        if (text == null) return 0;
46        final Resources res = mContext.getResources();
47        final float fontScale = res.getConfiguration().fontScale;
48        final float density = res.getDisplayMetrics().density;
49        final float px = text.getTextSize();
50        final int sp = (int)(px / fontScale / density);
51        mTexts.put(text, sp);
52        text.addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
53            @Override
54            public void onViewDetachedFromWindow(View v) {
55            }
56
57            @Override
58            public void onViewAttachedToWindow(View v) {
59               setTextSizeH(text, sp);
60            }
61        });
62        mTextLabels.put(text, labelResId);
63        return sp;
64    }
65
66    public void update() {
67        if (mTexts.isEmpty()) return;
68        mTexts.keyAt(0).post(mUpdateAll);
69    }
70
71    private void setTextSizeH(TextView text, int sp) {
72        text.setTextSize(TypedValue.COMPLEX_UNIT_SP, sp);
73    }
74
75    private void setTextLabelH(TextView text, int labelResId) {
76        try {
77            if (labelResId >= 0) {
78                Util.setText(text, mContext.getString(labelResId));
79            }
80        } catch (Resources.NotFoundException e) {
81            // oh well.
82        }
83    }
84
85    private final Runnable mUpdateAll = new Runnable() {
86        @Override
87        public void run() {
88            for (int i = 0; i < mTexts.size(); i++) {
89                setTextSizeH(mTexts.keyAt(i), mTexts.valueAt(i));
90            }
91            for (int i = 0; i < mTextLabels.size(); i++) {
92                setTextLabelH(mTextLabels.keyAt(i), mTextLabels.valueAt(i));
93            }
94        }
95    };
96}
97