| /* |
| * Copyright (C) 2013 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.settings; |
| |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.database.ContentObserver; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.os.Handler; |
| import android.os.IPowerManager; |
| import android.os.PowerManager; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.provider.Settings.SettingNotFoundException; |
| import android.widget.ImageView; |
| |
| import java.util.ArrayList; |
| |
| public class BrightnessController implements ToggleSlider.Listener { |
| private static final String TAG = "StatusBar.BrightnessController"; |
| |
| private final int mMinimumBacklight; |
| private final int mMaximumBacklight; |
| |
| private final Context mContext; |
| private final ImageView mIcon; |
| private final ToggleSlider mControl; |
| private final boolean mAutomaticAvailable; |
| private final IPowerManager mPower; |
| private final CurrentUserTracker mUserTracker; |
| private final Handler mHandler; |
| private final BrightnessObserver mBrightnessObserver; |
| |
| private ArrayList<BrightnessStateChangeCallback> mChangeCallbacks = |
| new ArrayList<BrightnessStateChangeCallback>(); |
| |
| public interface BrightnessStateChangeCallback { |
| public void onBrightnessLevelChanged(); |
| } |
| |
| /** ContentObserver to watch brightness **/ |
| private class BrightnessObserver extends ContentObserver { |
| |
| private final Uri BRIGHTNESS_MODE_URI = |
| Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS_MODE); |
| private final Uri BRIGHTNESS_URI = |
| Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS); |
| |
| public BrightnessObserver(Handler handler) { |
| super(handler); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| onChange(selfChange, null); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange, Uri uri) { |
| if (selfChange) return; |
| if (BRIGHTNESS_MODE_URI.equals(uri)) { |
| updateMode(); |
| } else if (BRIGHTNESS_URI.equals(uri)) { |
| updateSlider(); |
| } else { |
| updateMode(); |
| updateSlider(); |
| } |
| for (BrightnessStateChangeCallback cb : mChangeCallbacks) { |
| cb.onBrightnessLevelChanged(); |
| } |
| } |
| |
| public void startObserving() { |
| final ContentResolver cr = mContext.getContentResolver(); |
| cr.unregisterContentObserver(this); |
| cr.registerContentObserver( |
| BRIGHTNESS_MODE_URI, |
| false, this, UserHandle.USER_ALL); |
| cr.registerContentObserver( |
| BRIGHTNESS_URI, |
| false, this, UserHandle.USER_ALL); |
| } |
| |
| public void stopObserving() { |
| final ContentResolver cr = mContext.getContentResolver(); |
| cr.unregisterContentObserver(this); |
| } |
| |
| } |
| |
| public BrightnessController(Context context, ImageView icon, ToggleSlider control) { |
| mContext = context; |
| mIcon = icon; |
| mControl = control; |
| mHandler = new Handler(); |
| mUserTracker = new CurrentUserTracker(mContext) { |
| @Override |
| public void onUserSwitched(int newUserId) { |
| updateMode(); |
| updateSlider(); |
| } |
| }; |
| mBrightnessObserver = new BrightnessObserver(mHandler); |
| mBrightnessObserver.startObserving(); |
| |
| PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); |
| mMinimumBacklight = pm.getMinimumScreenBrightnessSetting(); |
| mMaximumBacklight = pm.getMaximumScreenBrightnessSetting(); |
| |
| mAutomaticAvailable = context.getResources().getBoolean( |
| com.android.internal.R.bool.config_automatic_brightness_available); |
| mPower = IPowerManager.Stub.asInterface(ServiceManager.getService("power")); |
| |
| // Update the slider and mode before attaching the listener so we don't receive the |
| // onChanged notifications for the initial values. |
| updateMode(); |
| updateSlider(); |
| |
| control.setOnChangedListener(this); |
| } |
| |
| public void addStateChangedCallback(BrightnessStateChangeCallback cb) { |
| mChangeCallbacks.add(cb); |
| } |
| |
| public boolean removeStateChangedCallback(BrightnessStateChangeCallback cb) { |
| return mChangeCallbacks.remove(cb); |
| } |
| |
| @Override |
| public void onInit(ToggleSlider control) { |
| // Do nothing |
| } |
| |
| /** Unregister all call backs, both to and from the controller */ |
| public void unregisterCallbacks() { |
| mBrightnessObserver.stopObserving(); |
| mChangeCallbacks.clear(); |
| mUserTracker.stopTracking(); |
| } |
| |
| public void onChanged(ToggleSlider view, boolean tracking, boolean automatic, int value) { |
| setMode(automatic ? Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC |
| : Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL); |
| updateIcon(automatic); |
| if (!automatic) { |
| final int val = value + mMinimumBacklight; |
| setBrightness(val); |
| if (!tracking) { |
| AsyncTask.execute(new Runnable() { |
| public void run() { |
| Settings.System.putIntForUser(mContext.getContentResolver(), |
| Settings.System.SCREEN_BRIGHTNESS, val, |
| UserHandle.USER_CURRENT); |
| } |
| }); |
| } |
| } |
| |
| for (BrightnessStateChangeCallback cb : mChangeCallbacks) { |
| cb.onBrightnessLevelChanged(); |
| } |
| } |
| |
| private void setMode(int mode) { |
| Settings.System.putIntForUser(mContext.getContentResolver(), |
| Settings.System.SCREEN_BRIGHTNESS_MODE, mode, |
| mUserTracker.getCurrentUserId()); |
| } |
| |
| private void setBrightness(int brightness) { |
| try { |
| mPower.setTemporaryScreenBrightnessSettingOverride(brightness); |
| } catch (RemoteException ex) { |
| } |
| } |
| |
| private void updateIcon(boolean automatic) { |
| if (mIcon != null) { |
| mIcon.setImageResource(automatic ? |
| com.android.systemui.R.drawable.ic_qs_brightness_auto_on : |
| com.android.systemui.R.drawable.ic_qs_brightness_auto_off); |
| } |
| } |
| |
| /** Fetch the brightness mode from the system settings and update the icon */ |
| private void updateMode() { |
| if (mAutomaticAvailable) { |
| int automatic; |
| try { |
| automatic = Settings.System.getIntForUser(mContext.getContentResolver(), |
| Settings.System.SCREEN_BRIGHTNESS_MODE, |
| UserHandle.USER_CURRENT); |
| } catch (SettingNotFoundException snfe) { |
| automatic = 0; |
| } |
| mControl.setChecked(automatic != 0); |
| updateIcon(automatic != 0); |
| } else { |
| mControl.setChecked(false); |
| updateIcon(false /*automatic*/); |
| } |
| } |
| |
| /** Fetch the brightness from the system settings and update the slider */ |
| private void updateSlider() { |
| int value; |
| try { |
| value = Settings.System.getIntForUser(mContext.getContentResolver(), |
| Settings.System.SCREEN_BRIGHTNESS, |
| UserHandle.USER_CURRENT); |
| } catch (SettingNotFoundException ex) { |
| value = mMaximumBacklight; |
| } |
| mControl.setMax(mMaximumBacklight - mMinimumBacklight); |
| mControl.setValue(value - mMinimumBacklight); |
| } |
| |
| } |