| /* |
| * Copyright (C) 2018 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.car.settings.quicksettings; |
| |
| import static android.provider.Settings.System.SCREEN_BRIGHTNESS; |
| |
| import static com.android.settingslib.display.BrightnessUtils.GAMMA_SPACE_MAX; |
| import static com.android.settingslib.display.BrightnessUtils.convertGammaToLinear; |
| import static com.android.settingslib.display.BrightnessUtils.convertLinearToGamma; |
| |
| import android.car.userlib.CarUserManagerHelper; |
| import android.content.Context; |
| import android.os.PowerManager; |
| import android.provider.Settings.SettingNotFoundException; |
| import android.provider.Settings.System; |
| import android.widget.SeekBar; |
| |
| import com.android.car.settings.common.Logger; |
| |
| /** |
| * A slider to adjust the brightness of the screen |
| */ |
| public class BrightnessTile implements QuickSettingGridAdapter.SeekbarTile { |
| private static final Logger LOG = new Logger(BrightnessTile.class); |
| private CarUserManagerHelper mCarUserManagerHelper; |
| private final Context mContext; |
| private final int mMaximumBacklight; |
| private final int mMinimumBacklight; |
| |
| public BrightnessTile(Context context) { |
| mContext = context; |
| mCarUserManagerHelper = new CarUserManagerHelper(mContext); |
| PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE); |
| mMaximumBacklight = powerManager.getMaximumScreenBrightnessSetting(); |
| mMinimumBacklight = powerManager.getMinimumScreenBrightnessSetting(); |
| } |
| |
| @Override |
| public void onStartTrackingTouch(SeekBar seekBar) { |
| // don't care |
| } |
| |
| @Override |
| public void onStopTrackingTouch(SeekBar seekBar) { |
| // don't care |
| } |
| |
| @Override |
| public void onProgressChanged(SeekBar seekBar, int gamma, boolean fromUser) { |
| int linear = convertGammaToLinear(gamma, mMinimumBacklight, mMaximumBacklight); |
| System.putIntForUser(mContext.getContentResolver(), SCREEN_BRIGHTNESS, linear, |
| mCarUserManagerHelper.getCurrentForegroundUserId()); |
| } |
| |
| @Override |
| public int getMax() { |
| return GAMMA_SPACE_MAX; |
| } |
| |
| @Override |
| public void stop() { |
| // nothing to do. |
| } |
| |
| @Override |
| public int getCurrent() { |
| int gamma = GAMMA_SPACE_MAX; |
| try { |
| int linear = System.getIntForUser(mContext.getContentResolver(), SCREEN_BRIGHTNESS, |
| mCarUserManagerHelper.getCurrentForegroundUserId()); |
| gamma = convertLinearToGamma(linear, mMinimumBacklight, mMaximumBacklight); |
| } catch (SettingNotFoundException e) { |
| LOG.w("Can't find setting for SCREEN_BRIGHTNESS."); |
| } |
| return gamma; |
| } |
| } |