src/com/android/settings/development/ForceMSAAPreferenceController.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settings.development;

import android.content.Context;
import android.os.SystemProperties;
import android.support.annotation.VisibleForTesting;
import android.support.v14.preference.SwitchPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;

import com.android.settingslib.development.SystemPropPoker;

public class ForceMSAAPreferenceController extends DeveloperOptionsPreferenceController
        implements Preference.OnPreferenceChangeListener {

    private static final String FORCE_MSAA_KEY = "force_msaa";

    @VisibleForTesting
    static final String MSAA_PROPERTY = "debug.egl.force_msaa";

    private SwitchPreference mPreference;

    public ForceMSAAPreferenceController(Context context) {
        super(context);
    }

    @Override
    public String getPreferenceKey() {
        return FORCE_MSAA_KEY;
    }

    @Override
    public void displayPreference(PreferenceScreen screen) {
        super.displayPreference(screen);

        mPreference = (SwitchPreference) screen.findPreference(getPreferenceKey());
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        final boolean isEnabled = (Boolean) newValue;
        SystemProperties.set(MSAA_PROPERTY,
                isEnabled ? Boolean.toString(true) : Boolean.toString(false));
        SystemPropPoker.getInstance().poke();
        return true;
    }

    @Override
    public void updateState(Preference preference) {
        final boolean isEnabled = SystemProperties.getBoolean(MSAA_PROPERTY, false /* default */);
        mPreference.setChecked(isEnabled);
    }

    @Override
    protected void onDeveloperOptionsSwitchEnabled() {
        mPreference.setEnabled(true);
    }

    @Override
    protected void onDeveloperOptionsSwitchDisabled() {
        SystemProperties.set(MSAA_PROPERTY, Boolean.toString(false));
        mPreference.setChecked(false);
        mPreference.setEnabled(false);
    }
}