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/*
* Copyright (C) 2008 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;
import android.content.Context;
import android.os.RemoteException;
import android.os.IHardwareService;
import android.os.ServiceManager;
import android.preference.SeekBarPreference;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.SeekBar;
import java.util.Map;
public class BrightnessPreference extends SeekBarPreference implements
SeekBar.OnSeekBarChangeListener {
private SeekBar mSeekBar;
private int mOldBrightness;
// Backlight range is from 0 - 255. Need to make sure that user
// doesn't set the backlight to 0 and get stuck
private static final int MINIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_DIM + 10;
private static final int MAXIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_ON;
public BrightnessPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onBindDialogView(View view) {
super.onBindDialogView(view);
mSeekBar = getSeekBar(view);
mSeekBar.setOnSeekBarChangeListener(this);
mSeekBar.setMax(MAXIMUM_BACKLIGHT - MINIMUM_BACKLIGHT);
try {
mOldBrightness = Settings.System.getInt(getContext().getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS);
} catch (SettingNotFoundException snfe) {
mOldBrightness = MAXIMUM_BACKLIGHT;
}
mSeekBar.setProgress(mOldBrightness - MINIMUM_BACKLIGHT);
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromTouch) {
setBrightness(progress + MINIMUM_BACKLIGHT);
}
public void onStartTrackingTouch(SeekBar seekBar) {
// NA
}
public void onStopTrackingTouch(SeekBar seekBar) {
// NA
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (positiveResult) {
Settings.System.putInt(getContext().getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS,
mSeekBar.getProgress() + MINIMUM_BACKLIGHT);
} else {
setBrightness(mOldBrightness);
}
}
private void setBrightness(int brightness) {
try {
IHardwareService hardware = IHardwareService.Stub.asInterface(
ServiceManager.getService("hardware"));
if (hardware != null) {
hardware.setBacklights(brightness);
}
} catch (RemoteException doe) {
}
}
}
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