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.development;
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 com.android.settings.R;
29
30import java.util.ArrayList;
31
32public class ColorModePreference extends SwitchPreference implements DisplayListener {
33
34    private DisplayManager mDisplayManager;
35    private Display mDisplay;
36
37    private int mCurrentIndex;
38    private ArrayList<ColorModeDescription> mDescriptions;
39
40    public ColorModePreference(Context context, AttributeSet attrs) {
41        super(context, attrs);
42        mDisplayManager = getContext().getSystemService(DisplayManager.class);
43    }
44
45    public int getColorModeCount() {
46        return mDescriptions.size();
47    }
48
49    public void startListening() {
50        mDisplayManager.registerDisplayListener(this, new Handler(Looper.getMainLooper()));
51    }
52
53    public void stopListening() {
54        mDisplayManager.unregisterDisplayListener(this);
55    }
56
57    @Override
58    public void onDisplayAdded(int displayId) {
59        if (displayId == Display.DEFAULT_DISPLAY) {
60            updateCurrentAndSupported();
61        }
62    }
63
64    @Override
65    public void onDisplayChanged(int displayId) {
66        if (displayId == Display.DEFAULT_DISPLAY) {
67            updateCurrentAndSupported();
68        }
69    }
70
71    @Override
72    public void onDisplayRemoved(int displayId) {
73    }
74
75    public void updateCurrentAndSupported() {
76        mDisplay = mDisplayManager.getDisplay(Display.DEFAULT_DISPLAY);
77
78        mDescriptions = new ArrayList<>();
79
80        Resources resources = getContext().getResources();
81        int[] colorModes = resources.getIntArray(R.array.color_mode_ids);
82        String[] titles = resources.getStringArray(R.array.color_mode_names);
83        String[] descriptions = resources.getStringArray(R.array.color_mode_descriptions);
84        // Map the resource information describing color modes.
85        for (int i = 0; i < colorModes.length; i++) {
86            if (colorModes[i] != -1 && i != 1 /* Skip Natural for now. */) {
87                ColorModeDescription desc = new ColorModeDescription();
88                desc.colorMode = colorModes[i];
89                desc.title = titles[i];
90                desc.summary = descriptions[i];
91                mDescriptions.add(desc);
92            }
93        }
94
95        int currentColorMode = mDisplay.getColorMode();
96        mCurrentIndex = -1;
97        for (int i = 0; i < mDescriptions.size(); i++) {
98            if (mDescriptions.get(i).colorMode == currentColorMode) {
99                mCurrentIndex = i;
100                break;
101            }
102        }
103        setChecked(mCurrentIndex == 1);
104    }
105
106    @Override
107    protected boolean persistBoolean(boolean value) {
108        // Right now this is a switch, so we only support two modes.
109        if (mDescriptions.size() == 2) {
110            ColorModeDescription desc = mDescriptions.get(value ? 1 : 0);
111
112            mDisplay.requestColorMode(desc.colorMode);
113            mCurrentIndex = mDescriptions.indexOf(desc);
114        }
115
116        return true;
117    }
118
119    private static class ColorModeDescription {
120        private int colorMode;
121        private String title;
122        private String summary;
123    }
124}
125