Jason Monk | 46dbfb4 | 2016-02-25 14:59:20 -0500 | [diff] [blame] | 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 | |
| 15 | package com.android.systemui; |
| 16 | |
| 17 | import android.annotation.Nullable; |
| 18 | import android.content.Context; |
| 19 | import android.content.res.Configuration; |
| 20 | import android.content.res.TypedArray; |
| 21 | import android.util.AttributeSet; |
| 22 | import android.view.LayoutInflater; |
| 23 | import android.view.View; |
| 24 | import android.widget.FrameLayout; |
| 25 | |
| 26 | import java.util.ArrayList; |
| 27 | import java.util.List; |
| 28 | |
| 29 | public class DensityContainer extends FrameLayout { |
| 30 | |
| 31 | private final List<InflateListener> mInflateListeners = new ArrayList<>(); |
| 32 | private final int mLayout; |
| 33 | private int mDensity; |
| 34 | |
| 35 | public DensityContainer(Context context, @Nullable AttributeSet attrs) { |
| 36 | super(context, attrs); |
| 37 | |
| 38 | mDensity = context.getResources().getConfiguration().densityDpi; |
| 39 | |
| 40 | TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DensityContainer); |
| 41 | if (!a.hasValue(R.styleable.DensityContainer_android_layout)) { |
| 42 | throw new IllegalArgumentException("DensityContainer must contain a layout"); |
| 43 | } |
| 44 | mLayout = a.getResourceId(R.styleable.DensityContainer_android_layout, 0); |
| 45 | inflateLayout(); |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | protected void onConfigurationChanged(Configuration newConfig) { |
| 50 | super.onConfigurationChanged(newConfig); |
| 51 | int density = newConfig.densityDpi; |
| 52 | if (density != mDensity) { |
| 53 | mDensity = density; |
| 54 | inflateLayout(); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | private void inflateLayout() { |
| 59 | removeAllViews(); |
| 60 | LayoutInflater.from(getContext()).inflate(mLayout, this); |
| 61 | final int N = mInflateListeners.size(); |
| 62 | for (int i = 0; i < N; i++) { |
| 63 | mInflateListeners.get(i).onInflated(getChildAt(0)); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | public void addInflateListener(InflateListener listener) { |
| 68 | mInflateListeners.add(listener); |
| 69 | listener.onInflated(getChildAt(0)); |
| 70 | } |
| 71 | |
| 72 | public interface InflateListener { |
| 73 | /** |
| 74 | * Called whenever a new view is inflated. |
| 75 | */ |
| 76 | void onInflated(View v); |
| 77 | } |
| 78 | } |