/*
* Copyright (C) 2010 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 static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
import android.app.ActivityManagerNative;
import android.app.admin.DevicePolicyManager;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.os.Bundle;
import android.os.Handler;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceScreen;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.util.Log;
import android.view.IWindowManager;
import android.view.Surface;
import java.util.ArrayList;
public class DisplaySettings extends SettingsPreferenceFragment implements
Preference.OnPreferenceChangeListener {
private static final String TAG = "DisplaySettings";
/** If there is no setting in the provider, use this. */
private static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000;
private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
private static final String KEY_ACCELEROMETER = "accelerometer";
private static final String KEY_FONT_SIZE = "font_size";
private static final String KEY_NOTIFICATION_PULSE = "notification_pulse";
private CheckBoxPreference mAccelerometer;
private ListPreference mFontSizePref;
private CheckBoxPreference mNotificationPulse;
private final Configuration mCurConfig = new Configuration();
private ListPreference mScreenTimeoutPreference;
private ContentObserver mAccelerometerRotationObserver = new ContentObserver(new Handler()) {
@Override
public void onChange(boolean selfChange) {
updateAccelerometerRotationCheckbox();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ContentResolver resolver = getActivity().getContentResolver();
addPreferencesFromResource(R.xml.display_settings);
mAccelerometer = (CheckBoxPreference) findPreference(KEY_ACCELEROMETER);
mAccelerometer.setPersistent(false);
mScreenTimeoutPreference = (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);
final long currentTimeout = Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT,
FALLBACK_SCREEN_TIMEOUT_VALUE);
mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout));
mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
disableUnusableTimeouts(mScreenTimeoutPreference);
updateTimeoutPreferenceDescription(currentTimeout);
mFontSizePref = (ListPreference) findPreference(KEY_FONT_SIZE);
mFontSizePref.setOnPreferenceChangeListener(this);
mNotificationPulse = (CheckBoxPreference) findPreference(KEY_NOTIFICATION_PULSE);
if (mNotificationPulse != null
&& getResources().getBoolean(
com.android.internal.R.bool.config_intrusiveNotificationLed) == false) {
getPreferenceScreen().removePreference(mNotificationPulse);
} else {
try {
mNotificationPulse.setChecked(Settings.System.getInt(resolver,
Settings.System.NOTIFICATION_LIGHT_PULSE) == 1);
mNotificationPulse.setOnPreferenceChangeListener(this);
} catch (SettingNotFoundException snfe) {
Log.e(TAG, Settings.System.NOTIFICATION_LIGHT_PULSE + " not found");
}
}
}
private void updateTimeoutPreferenceDescription(long currentTimeout) {
ListPreference preference = mScreenTimeoutPreference;
String summary;
if (currentTimeout < 0) {
// Unsupported value
summary = "";
} else {
final CharSequence[] entries = preference.getEntries();
final CharSequence[] values = preference.getEntryValues();
int best = 0;
for (int i = 0; i < values.length; i++) {
long timeout = Long.parseLong(values[i].toString());
if (currentTimeout >= timeout) {
best = i;
}
}
summary = preference.getContext().getString(R.string.screen_timeout_summary,
entries[best]);
}
preference.setSummary(summary);
}
private void disableUnusableTimeouts(ListPreference screenTimeoutPreference) {
final DevicePolicyManager dpm =
(DevicePolicyManager) getActivity().getSystemService(
Context.DEVICE_POLICY_SERVICE);
final long maxTimeout = dpm != null ? dpm.getMaximumTimeToLock(null) : 0;
if (maxTimeout == 0) {
return; // policy not enforced
}
final CharSequence[] entries = screenTimeoutPreference.getEntries();
final CharSequence[] values = screenTimeoutPreference.getEntryValues();
ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>();
ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>();
for (int i = 0; i < values.length; i++) {
long timeout = Long.parseLong(values[i].toString());
if (timeout <= maxTimeout) {
revisedEntries.add(entries[i]);
revisedValues.add(values[i]);
}
}
if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
screenTimeoutPreference.setEntries(
revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
screenTimeoutPreference.setEntryValues(
revisedValues.toArray(new CharSequence[revisedValues.size()]));
final int userPreference = Integer.parseInt(screenTimeoutPreference.getValue());
if (userPreference <= maxTimeout) {
screenTimeoutPreference.setValue(String.valueOf(userPreference));
} else {
// There will be no highlighted selection since nothing in the list matches
// maxTimeout. The user can still select anything less than maxTimeout.
// TODO: maybe append maxTimeout to the list and mark selected.
}
}
screenTimeoutPreference.setEnabled(revisedEntries.size() > 0);
}
int floatToIndex(float val) {
String[] indices = getResources().getStringArray(R.array.entryvalues_font_size);
float lastVal = Float.parseFloat(indices[0]);
for (int i=1; i<indices.length; i++) {
float thisVal = Float.parseFloat(indices[i]);
if (val < (lastVal + (thisVal-lastVal)*.5f)) {
return i-1;
}
lastVal = thisVal;
}
return indices.length-1;
}
public void readFontSizePreference(ListPreference pref) {
try {
mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration());
} catch (RemoteException e) {
Log.w(TAG, "Unable to retrieve font size");
}
// mark the appropriate item in the preferences list
int index = floatToIndex(mCurConfig.fontScale);
pref.setValueIndex(index);
// report the current size in the summary text
final Resources res = getResources();
String[] fontSizeNames = res.getStringArray(R.array.entries_font_size);
pref.setSummary(String.format(res.getString(R.string.summary_font_size),
fontSizeNames[index]));
}
@Override
public void onResume() {
super.onResume();
updateState();
getContentResolver().registerContentObserver(
Settings.System.getUriFor(Settings.System.ACCELEROMETER_ROTATION), true,
mAccelerometerRotationObserver);
}
@Override
public void onPause() {
super.onPause();
getContentResolver().unregisterContentObserver(mAccelerometerRotationObserver);
}
private void updateState() {
updateAccelerometerRotationCheckbox();
readFontSizePreference(mFontSizePref);
}
private void updateAccelerometerRotationCheckbox() {
mAccelerometer.setChecked(Settings.System.getInt(
getContentResolver(),
Settings.System.ACCELEROMETER_ROTATION, 0) != 0);
}
public void writeFontSizePreference(Object objValue) {
try {
mCurConfig.fontScale = Float.parseFloat(objValue.toString());
ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
} catch (RemoteException e) {
Log.w(TAG, "Unable to save font size");
}
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
if (preference == mAccelerometer) {
try {
IWindowManager wm = IWindowManager.Stub.asInterface(
ServiceManager.getService(Context.WINDOW_SERVICE));
if (mAccelerometer.isChecked()) {
wm.thawRotation();
} else {
wm.freezeRotation(Surface.ROTATION_0);
}
} catch (RemoteException exc) {
Log.w(TAG, "Unable to save auto-rotate setting");
}
} else if (preference == mNotificationPulse) {
boolean value = mNotificationPulse.isChecked();
Settings.System.putInt(getContentResolver(), Settings.System.NOTIFICATION_LIGHT_PULSE,
value ? 1 : 0);
return true;
}
return super.onPreferenceTreeClick(preferenceScreen, preference);
}
public boolean onPreferenceChange(Preference preference, Object objValue) {
final String key = preference.getKey();
if (KEY_SCREEN_TIMEOUT.equals(key)) {
int value = Integer.parseInt((String) objValue);
try {
Settings.System.putInt(getContentResolver(), SCREEN_OFF_TIMEOUT, value);
updateTimeoutPreferenceDescription(value);
} catch (NumberFormatException e) {
Log.e(TAG, "could not persist screen timeout setting", e);
}
}
if (KEY_FONT_SIZE.equals(key)) {
writeFontSizePreference(objValue);
}
return true;
}
}