104 lines
3.3 KiB
Java
104 lines
3.3 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings;
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import android.content.Context;
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import android.os.RemoteException;
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import android.os.IHardwareService;
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import android.os.ServiceManager;
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import android.preference.SeekBarPreference;
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import android.provider.Settings;
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import android.provider.Settings.SettingNotFoundException;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.View;
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import android.widget.SeekBar;
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import java.util.Map;
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public class BrightnessPreference extends SeekBarPreference implements
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SeekBar.OnSeekBarChangeListener {
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private SeekBar mSeekBar;
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private int mOldBrightness;
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// Backlight range is from 0 - 255. Need to make sure that user
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// doesn't set the backlight to 0 and get stuck
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private static final int MINIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_DIM + 10;
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private static final int MAXIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_ON;
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public BrightnessPreference(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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@Override
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protected void onBindDialogView(View view) {
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super.onBindDialogView(view);
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mSeekBar = getSeekBar(view);
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mSeekBar.setOnSeekBarChangeListener(this);
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mSeekBar.setMax(MAXIMUM_BACKLIGHT - MINIMUM_BACKLIGHT);
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try {
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mOldBrightness = Settings.System.getInt(getContext().getContentResolver(),
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Settings.System.SCREEN_BRIGHTNESS);
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} catch (SettingNotFoundException snfe) {
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mOldBrightness = MAXIMUM_BACKLIGHT;
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}
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mSeekBar.setProgress(mOldBrightness - MINIMUM_BACKLIGHT);
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}
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public void onProgressChanged(SeekBar seekBar, int progress,
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boolean fromTouch) {
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setBrightness(progress + MINIMUM_BACKLIGHT);
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}
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public void onStartTrackingTouch(SeekBar seekBar) {
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// NA
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}
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public void onStopTrackingTouch(SeekBar seekBar) {
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// NA
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}
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@Override
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protected void onDialogClosed(boolean positiveResult) {
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super.onDialogClosed(positiveResult);
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if (positiveResult) {
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Settings.System.putInt(getContext().getContentResolver(),
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Settings.System.SCREEN_BRIGHTNESS,
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mSeekBar.getProgress() + MINIMUM_BACKLIGHT);
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} else {
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setBrightness(mOldBrightness);
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}
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}
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private void setBrightness(int brightness) {
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try {
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IHardwareService hardware = IHardwareService.Stub.asInterface(
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ServiceManager.getService("hardware"));
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if (hardware != null) {
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hardware.setBacklights(brightness);
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}
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} catch (RemoteException doe) {
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}
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}
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}
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