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/*
* Copyright (C) 2011 The CyanogenMod 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.cyanogenmod.settings.device;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.preference.DialogPreference;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;
/**
* Special preference type that allows configuration of both the ring volume and
* notification volume.
*/
public class GammaTuningPreference extends DialogPreference {
private static final String TAG = "GAMMA...";
enum Colors {
RED, GREEN, BLUE
};
private static final int[] SEEKBAR_ID = new int[] {
R.id.gamma_red_seekbar, R.id.gamma_green_seekbar, R.id.gamma_blue_seekbar
};
private static final int[] VALUE_DISPLAY_ID = new int[] {
R.id.gamma_red_value, R.id.gamma_green_value, R.id.gamma_blue_value
};
private static final String[] FILE_PATH = new String[] {
"/sys/class/misc/samoled_color/red_v1_offset",
"/sys/class/misc/samoled_color/green_v1_offset",
"/sys/class/misc/samoled_color/blue_v1_offset"
};
private GammaSeekBar mSeekBars[] = new GammaSeekBar[3];
private static final int MAX_VALUE = 80;
private static final int OFFSET_VALUE = 0;
// Track instances to know when to restore original color
// (when the orientation changes, a new dialog is created before the old one
// is destroyed)
private static int sInstances = 0;
public GammaTuningPreference(Context context, AttributeSet attrs) {
super(context, attrs);
setDialogLayoutResource(R.layout.preference_dialog_gamma_tuning);
}
@Override
protected void onBindDialogView(View view) {
super.onBindDialogView(view);
sInstances++;
for (int i = 0; i < SEEKBAR_ID.length; i++) {
SeekBar seekBar = (SeekBar) view.findViewById(SEEKBAR_ID[i]);
TextView valueDisplay = (TextView) view.findViewById(VALUE_DISPLAY_ID[i]);
mSeekBars[i] = new GammaSeekBar(seekBar, valueDisplay, FILE_PATH[i]);
}
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
sInstances--;
if (positiveResult) {
for (GammaSeekBar csb : mSeekBars) {
csb.save();
}
} else if (sInstances == 0) {
for (GammaSeekBar csb : mSeekBars) {
csb.reset();
}
}
}
/**
* Restore screen color tuning from SharedPreferences. (Write to kernel.)
*
* @param context The context to read the SharedPreferences from
*/
public static void restore(Context context) {
if (!isSupported()) {
return;
}
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
for (String filePath : FILE_PATH) {
String sDefaultValue = Utils.readOneLine(filePath);
int iValue = sharedPrefs.getInt(filePath, Integer.valueOf(sDefaultValue));
Utils.writeValue(filePath, String.valueOf((long) iValue));
}
}
/**
* Check whether the running kernel supports color tuning or not.
*
* @return Whether color tuning is supported or not
*/
public static boolean isSupported() {
boolean supported = true;
for (String filePath : FILE_PATH) {
if (!Utils.fileExists(filePath)) {
supported = false;
}
}
return supported;
}
class GammaSeekBar implements SeekBar.OnSeekBarChangeListener {
private String mFilePath;
private int mOriginal;
private SeekBar mSeekBar;
private TextView mValueDisplay;
public GammaSeekBar(SeekBar seekBar, TextView valueDisplay, String filePath) {
int iValue;
mSeekBar = seekBar;
mValueDisplay = valueDisplay;
mFilePath = filePath;
SharedPreferences sharedPreferences = getSharedPreferences();
// Read original value
if (Utils.fileExists(mFilePath)) {
String sDefaultValue = Utils.readOneLine(mFilePath);
iValue = Integer.valueOf(sDefaultValue);
} else {
iValue = MAX_VALUE - OFFSET_VALUE;
}
mOriginal = iValue;
mSeekBar.setMax(MAX_VALUE);
reset();
mSeekBar.setOnSeekBarChangeListener(this);
}
public void reset() {
int iValue;
iValue = mOriginal + OFFSET_VALUE;
mSeekBar.setProgress(iValue);
updateValue(mOriginal);
}
public void save() {
int iValue;
iValue = mSeekBar.getProgress() - OFFSET_VALUE;
Editor editor = getEditor();
editor.putInt(mFilePath, iValue);
editor.commit();
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
int iValue;
iValue = progress - OFFSET_VALUE;
Utils.writeValue(mFilePath, String.valueOf((long) iValue));
updateValue(iValue);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// Do nothing
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// Do nothing
}
private void updateValue(int progress) {
mValueDisplay.setText(String.format("%d", (int) progress));
}
}
}
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