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 */
16package com.android.settings;
17
18import android.content.Context;
19import android.content.res.Resources;
20import android.hardware.display.DisplayManager;
21import android.hardware.display.DisplayManager.DisplayListener;
22import android.os.Handler;
23import android.os.Looper;
24import android.support.v14.preference.SwitchPreference;
25import android.util.AttributeSet;
26import android.view.Display;
27
28import java.util.ArrayList;
29
30public class ColorModePreference extends SwitchPreference implements DisplayListener {
31
32    private DisplayManager mDisplayManager;
33    private Display mDisplay;
34
35    private int mCurrentIndex;
36    private ArrayList<ColorModeDescription> mDescriptions;
37
38    public ColorModePreference(Context context, AttributeSet attrs) {
39        super(context, attrs);
40        mDisplayManager = getContext().getSystemService(DisplayManager.class);
41    }
42
43    public int getColorModeCount() {
44        return mDescriptions.size();
45    }
46
47    public void startListening() {
48        mDisplayManager.registerDisplayListener(this, new Handler(Looper.getMainLooper()));
49    }
50
51    public void stopListening() {
52        mDisplayManager.unregisterDisplayListener(this);
53    }
54
55    @Override
56    public void onDisplayAdded(int displayId) {
57        if (displayId == Display.DEFAULT_DISPLAY) {
58            updateCurrentAndSupported();
59        }
60    }
61
62    @Override
63    public void onDisplayChanged(int displayId) {
64        if (displayId == Display.DEFAULT_DISPLAY) {
65            updateCurrentAndSupported();
66        }
67    }
68
69    @Override
70    public void onDisplayRemoved(int displayId) {
71    }
72
73    public void updateCurrentAndSupported() {
74        mDisplay = mDisplayManager.getDisplay(Display.DEFAULT_DISPLAY);
75
76        mDescriptions = new ArrayList<>();
77
78        Resources resources = getContext().getResources();
79        int[] colorModes = resources.getIntArray(R.array.color_mode_ids);
80        String[] titles = resources.getStringArray(R.array.color_mode_names);
81        String[] descriptions = resources.getStringArray(R.array.color_mode_descriptions);
82        // Map the resource information describing color modes.
83        for (int i = 0; i < colorModes.length; i++) {
84            if (colorModes[i] != -1 && i != 1 /* Skip Natural for now. */) {
85                ColorModeDescription desc = new ColorModeDescription();
86                desc.colorMode = colorModes[i];
87                desc.title = titles[i];
88                desc.summary = descriptions[i];
89                mDescriptions.add(desc);
90            }
91        }
92
93        int currentColorMode = mDisplay.getColorMode();
94        mCurrentIndex = -1;
95        for (int i = 0; i < mDescriptions.size(); i++) {
96            if (mDescriptions.get(i).colorMode == currentColorMode) {
97                mCurrentIndex = i;
98                break;
99            }
100        }
101        setChecked(mCurrentIndex == 1);
102    }
103
104    @Override
105    protected boolean persistBoolean(boolean value) {
106        // Right now this is a switch, so we only support two modes.
107        if (mDescriptions.size() == 2) {
108            ColorModeDescription desc = mDescriptions.get(value ? 1 : 0);
109
110            mDisplay.requestColorMode(desc.colorMode);
111            mCurrentIndex = mDescriptions.indexOf(desc);
112        }
113
114        return true;
115    }
116
117    private static class ColorModeDescription {
118        private int colorMode;
119        private String title;
120        private String summary;
121    }
122}
123