| /* |
| * Copyright (C) 2014 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.systemui.qs; |
| |
| import android.database.ContentObserver; |
| import android.os.Handler; |
| |
| import com.android.systemui.statusbar.policy.Listenable; |
| import com.android.systemui.util.settings.GlobalSettings; |
| import com.android.systemui.util.settings.SecureSettings; |
| import com.android.systemui.util.settings.SettingsProxy; |
| import com.android.systemui.util.settings.SystemSettings; |
| |
| /** |
| * Helper for managing secure, global, and system settings through use of {@link SettingsProxy}, |
| * which is the common superclass of {@link SecureSettings}, {@link GlobalSettings}, and |
| * {@link SystemSettings}. |
| */ |
| public abstract class SettingObserver extends ContentObserver implements Listenable { |
| private final SettingsProxy mSettingsProxy; |
| private final String mSettingName; |
| private final int mDefaultValue; |
| |
| private boolean mListening; |
| private int mUserId; |
| private int mObservedValue; |
| |
| protected abstract void handleValueChanged(int value, boolean observedChange); |
| |
| public SettingObserver(SettingsProxy settingsProxy, Handler handler, String settingName, |
| int userId) { |
| this(settingsProxy, handler, settingName, userId, 0); |
| } |
| |
| public SettingObserver(SettingsProxy settingsProxy, Handler handler, String settingName, |
| int userId, int defaultValue) { |
| super(handler); |
| mSettingsProxy = settingsProxy; |
| mSettingName = settingName; |
| mObservedValue = mDefaultValue = defaultValue; |
| mUserId = userId; |
| } |
| |
| public int getValue() { |
| return mListening ? mObservedValue : getValueFromProvider(); |
| } |
| |
| /** |
| * Set the value of the observed setting. |
| * |
| * @param value The new value for the setting. |
| */ |
| public void setValue(int value) { |
| mSettingsProxy.putIntForUser(mSettingName, value, mUserId); |
| } |
| |
| private int getValueFromProvider() { |
| return mSettingsProxy.getIntForUser(mSettingName, mDefaultValue, mUserId); |
| } |
| |
| @Override |
| public void setListening(boolean listening) { |
| if (listening == mListening) return; |
| mListening = listening; |
| if (listening) { |
| mObservedValue = getValueFromProvider(); |
| mSettingsProxy.registerContentObserverForUser( |
| mSettingsProxy.getUriFor(mSettingName), false, this, mUserId); |
| } else { |
| mSettingsProxy.unregisterContentObserver(this); |
| mObservedValue = mDefaultValue; |
| } |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| final int value = getValueFromProvider(); |
| final boolean changed = value != mObservedValue; |
| mObservedValue = value; |
| handleValueChanged(value, changed); |
| } |
| |
| /** |
| * Set user handle for which to observe the setting. |
| */ |
| public void setUserId(int userId) { |
| mUserId = userId; |
| if (mListening) { |
| setListening(false); |
| setListening(true); |
| } |
| } |
| |
| public int getCurrentUser() { |
| return mUserId; |
| } |
| |
| public String getKey() { |
| return mSettingName; |
| } |
| |
| public boolean isListening() { |
| return mListening; |
| } |
| } |