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1 /*
2  * Copyright (C) 2010 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.settings;
18 
19 import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
20 
21 import android.app.ActivityManagerNative;
22 import android.app.Dialog;
23 import android.app.admin.DevicePolicyManager;
24 import android.content.BroadcastReceiver;
25 import android.content.ContentResolver;
26 import android.content.Context;
27 import android.content.Intent;
28 import android.content.IntentFilter;
29 import android.content.res.Configuration;
30 import android.content.res.Resources;
31 import android.hardware.display.DisplayManager;
32 import android.hardware.display.WifiDisplay;
33 import android.hardware.display.WifiDisplayStatus;
34 import android.os.Bundle;
35 import android.os.RemoteException;
36 import android.preference.CheckBoxPreference;
37 import android.preference.ListPreference;
38 import android.preference.Preference;
39 import android.preference.Preference.OnPreferenceClickListener;
40 import android.preference.PreferenceScreen;
41 import android.provider.Settings;
42 import android.provider.Settings.SettingNotFoundException;
43 import android.util.AttributeSet;
44 import android.util.Log;
45 
46 import com.android.internal.view.RotationPolicy;
47 import com.android.settings.DreamSettings;
48 
49 import java.util.ArrayList;
50 
51 public class DisplaySettings extends SettingsPreferenceFragment implements
52         Preference.OnPreferenceChangeListener, OnPreferenceClickListener {
53     private static final String TAG = "DisplaySettings";
54 
55     /** If there is no setting in the provider, use this. */
56     private static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000;
57 
58     private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
59     private static final String KEY_ACCELEROMETER = "accelerometer";
60     private static final String KEY_FONT_SIZE = "font_size";
61     private static final String KEY_NOTIFICATION_PULSE = "notification_pulse";
62     private static final String KEY_SCREEN_SAVER = "screensaver";
63     private static final String KEY_WIFI_DISPLAY = "wifi_display";
64 
65     private static final int DLG_GLOBAL_CHANGE_WARNING = 1;
66 
67     private DisplayManager mDisplayManager;
68 
69     private CheckBoxPreference mAccelerometer;
70     private WarnedListPreference mFontSizePref;
71     private CheckBoxPreference mNotificationPulse;
72 
73     private final Configuration mCurConfig = new Configuration();
74 
75     private ListPreference mScreenTimeoutPreference;
76     private Preference mScreenSaverPreference;
77 
78     private WifiDisplayStatus mWifiDisplayStatus;
79     private Preference mWifiDisplayPreference;
80 
81     private final RotationPolicy.RotationPolicyListener mRotationPolicyListener =
82             new RotationPolicy.RotationPolicyListener() {
83         @Override
84         public void onChange() {
85             updateAccelerometerRotationCheckbox();
86         }
87     };
88 
89     @Override
onCreate(Bundle savedInstanceState)90     public void onCreate(Bundle savedInstanceState) {
91         super.onCreate(savedInstanceState);
92         ContentResolver resolver = getActivity().getContentResolver();
93 
94         addPreferencesFromResource(R.xml.display_settings);
95 
96         mAccelerometer = (CheckBoxPreference) findPreference(KEY_ACCELEROMETER);
97         mAccelerometer.setPersistent(false);
98         if (RotationPolicy.isRotationLockToggleSupported(getActivity())) {
99             // If rotation lock is supported, then we do not provide this option in
100             // Display settings.  However, is still available in Accessibility settings.
101             getPreferenceScreen().removePreference(mAccelerometer);
102         }
103 
104         mScreenSaverPreference = findPreference(KEY_SCREEN_SAVER);
105         if (mScreenSaverPreference != null
106                 && getResources().getBoolean(
107                         com.android.internal.R.bool.config_dreamsSupported) == false) {
108             getPreferenceScreen().removePreference(mScreenSaverPreference);
109         }
110 
111         mScreenTimeoutPreference = (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);
112         final long currentTimeout = Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT,
113                 FALLBACK_SCREEN_TIMEOUT_VALUE);
114         mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout));
115         mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
116         disableUnusableTimeouts(mScreenTimeoutPreference);
117         updateTimeoutPreferenceDescription(currentTimeout);
118 
119         mFontSizePref = (WarnedListPreference) findPreference(KEY_FONT_SIZE);
120         mFontSizePref.setOnPreferenceChangeListener(this);
121         mFontSizePref.setOnPreferenceClickListener(this);
122         mNotificationPulse = (CheckBoxPreference) findPreference(KEY_NOTIFICATION_PULSE);
123         if (mNotificationPulse != null
124                 && getResources().getBoolean(
125                         com.android.internal.R.bool.config_intrusiveNotificationLed) == false) {
126             getPreferenceScreen().removePreference(mNotificationPulse);
127         } else {
128             try {
129                 mNotificationPulse.setChecked(Settings.System.getInt(resolver,
130                         Settings.System.NOTIFICATION_LIGHT_PULSE) == 1);
131                 mNotificationPulse.setOnPreferenceChangeListener(this);
132             } catch (SettingNotFoundException snfe) {
133                 Log.e(TAG, Settings.System.NOTIFICATION_LIGHT_PULSE + " not found");
134             }
135         }
136 
137         mDisplayManager = (DisplayManager)getActivity().getSystemService(
138                 Context.DISPLAY_SERVICE);
139         mWifiDisplayStatus = mDisplayManager.getWifiDisplayStatus();
140         mWifiDisplayPreference = (Preference)findPreference(KEY_WIFI_DISPLAY);
141         if (mWifiDisplayStatus.getFeatureState()
142                 == WifiDisplayStatus.FEATURE_STATE_UNAVAILABLE) {
143             getPreferenceScreen().removePreference(mWifiDisplayPreference);
144             mWifiDisplayPreference = null;
145         }
146     }
147 
updateTimeoutPreferenceDescription(long currentTimeout)148     private void updateTimeoutPreferenceDescription(long currentTimeout) {
149         ListPreference preference = mScreenTimeoutPreference;
150         String summary;
151         if (currentTimeout < 0) {
152             // Unsupported value
153             summary = "";
154         } else {
155             final CharSequence[] entries = preference.getEntries();
156             final CharSequence[] values = preference.getEntryValues();
157             if (entries == null || entries.length == 0) {
158                 summary = "";
159             } else {
160                 int best = 0;
161                 for (int i = 0; i < values.length; i++) {
162                     long timeout = Long.parseLong(values[i].toString());
163                     if (currentTimeout >= timeout) {
164                         best = i;
165                     }
166                 }
167                 summary = preference.getContext().getString(R.string.screen_timeout_summary,
168                         entries[best]);
169             }
170         }
171         preference.setSummary(summary);
172     }
173 
disableUnusableTimeouts(ListPreference screenTimeoutPreference)174     private void disableUnusableTimeouts(ListPreference screenTimeoutPreference) {
175         final DevicePolicyManager dpm =
176                 (DevicePolicyManager) getActivity().getSystemService(
177                 Context.DEVICE_POLICY_SERVICE);
178         final long maxTimeout = dpm != null ? dpm.getMaximumTimeToLock(null) : 0;
179         if (maxTimeout == 0) {
180             return; // policy not enforced
181         }
182         final CharSequence[] entries = screenTimeoutPreference.getEntries();
183         final CharSequence[] values = screenTimeoutPreference.getEntryValues();
184         ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>();
185         ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>();
186         for (int i = 0; i < values.length; i++) {
187             long timeout = Long.parseLong(values[i].toString());
188             if (timeout <= maxTimeout) {
189                 revisedEntries.add(entries[i]);
190                 revisedValues.add(values[i]);
191             }
192         }
193         if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
194             screenTimeoutPreference.setEntries(
195                     revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
196             screenTimeoutPreference.setEntryValues(
197                     revisedValues.toArray(new CharSequence[revisedValues.size()]));
198             final int userPreference = Integer.parseInt(screenTimeoutPreference.getValue());
199             if (userPreference <= maxTimeout) {
200                 screenTimeoutPreference.setValue(String.valueOf(userPreference));
201             } else {
202                 // There will be no highlighted selection since nothing in the list matches
203                 // maxTimeout. The user can still select anything less than maxTimeout.
204                 // TODO: maybe append maxTimeout to the list and mark selected.
205             }
206         }
207         screenTimeoutPreference.setEnabled(revisedEntries.size() > 0);
208     }
209 
floatToIndex(float val)210     int floatToIndex(float val) {
211         String[] indices = getResources().getStringArray(R.array.entryvalues_font_size);
212         float lastVal = Float.parseFloat(indices[0]);
213         for (int i=1; i<indices.length; i++) {
214             float thisVal = Float.parseFloat(indices[i]);
215             if (val < (lastVal + (thisVal-lastVal)*.5f)) {
216                 return i-1;
217             }
218             lastVal = thisVal;
219         }
220         return indices.length-1;
221     }
222 
readFontSizePreference(ListPreference pref)223     public void readFontSizePreference(ListPreference pref) {
224         try {
225             mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration());
226         } catch (RemoteException e) {
227             Log.w(TAG, "Unable to retrieve font size");
228         }
229 
230         // mark the appropriate item in the preferences list
231         int index = floatToIndex(mCurConfig.fontScale);
232         pref.setValueIndex(index);
233 
234         // report the current size in the summary text
235         final Resources res = getResources();
236         String[] fontSizeNames = res.getStringArray(R.array.entries_font_size);
237         pref.setSummary(String.format(res.getString(R.string.summary_font_size),
238                 fontSizeNames[index]));
239     }
240 
241     @Override
onResume()242     public void onResume() {
243         super.onResume();
244 
245         RotationPolicy.registerRotationPolicyListener(getActivity(),
246                 mRotationPolicyListener);
247 
248         if (mWifiDisplayPreference != null) {
249             getActivity().registerReceiver(mReceiver, new IntentFilter(
250                     DisplayManager.ACTION_WIFI_DISPLAY_STATUS_CHANGED));
251             mWifiDisplayStatus = mDisplayManager.getWifiDisplayStatus();
252         }
253 
254         updateState();
255     }
256 
257     @Override
onPause()258     public void onPause() {
259         super.onPause();
260 
261         RotationPolicy.unregisterRotationPolicyListener(getActivity(),
262                 mRotationPolicyListener);
263 
264         if (mWifiDisplayPreference != null) {
265             getActivity().unregisterReceiver(mReceiver);
266         }
267     }
268 
269     @Override
onCreateDialog(int dialogId)270     public Dialog onCreateDialog(int dialogId) {
271         if (dialogId == DLG_GLOBAL_CHANGE_WARNING) {
272             return Utils.buildGlobalChangeWarningDialog(getActivity(),
273                     R.string.global_font_change_title,
274                     new Runnable() {
275                         public void run() {
276                             mFontSizePref.click();
277                         }
278                     });
279         }
280         return null;
281     }
282 
283     private void updateState() {
284         updateAccelerometerRotationCheckbox();
285         readFontSizePreference(mFontSizePref);
286         updateScreenSaverSummary();
287         updateWifiDisplaySummary();
288     }
289 
290     private void updateScreenSaverSummary() {
291         if (mScreenSaverPreference != null) {
292             mScreenSaverPreference.setSummary(
293                     DreamSettings.getSummaryTextWithDreamName(getActivity()));
294         }
295     }
296 
297     private void updateWifiDisplaySummary() {
298         if (mWifiDisplayPreference != null) {
299             switch (mWifiDisplayStatus.getFeatureState()) {
300                 case WifiDisplayStatus.FEATURE_STATE_OFF:
301                     mWifiDisplayPreference.setSummary(R.string.wifi_display_summary_off);
302                     break;
303                 case WifiDisplayStatus.FEATURE_STATE_ON:
304                     mWifiDisplayPreference.setSummary(R.string.wifi_display_summary_on);
305                     break;
306                 case WifiDisplayStatus.FEATURE_STATE_DISABLED:
307                 default:
308                     mWifiDisplayPreference.setSummary(R.string.wifi_display_summary_disabled);
309                     break;
310             }
311         }
312     }
313 
314     private void updateAccelerometerRotationCheckbox() {
315         if (getActivity() == null) return;
316 
317         mAccelerometer.setChecked(!RotationPolicy.isRotationLocked(getActivity()));
318     }
319 
320     public void writeFontSizePreference(Object objValue) {
321         try {
322             mCurConfig.fontScale = Float.parseFloat(objValue.toString());
323             ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
324         } catch (RemoteException e) {
325             Log.w(TAG, "Unable to save font size");
326         }
327     }
328 
329     @Override
330     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
331         if (preference == mAccelerometer) {
332             RotationPolicy.setRotationLockForAccessibility(
333                     getActivity(), !mAccelerometer.isChecked());
334         } else if (preference == mNotificationPulse) {
335             boolean value = mNotificationPulse.isChecked();
336             Settings.System.putInt(getContentResolver(), Settings.System.NOTIFICATION_LIGHT_PULSE,
337                     value ? 1 : 0);
338             return true;
339         }
340         return super.onPreferenceTreeClick(preferenceScreen, preference);
341     }
342 
343     public boolean onPreferenceChange(Preference preference, Object objValue) {
344         final String key = preference.getKey();
345         if (KEY_SCREEN_TIMEOUT.equals(key)) {
346             int value = Integer.parseInt((String) objValue);
347             try {
348                 Settings.System.putInt(getContentResolver(), SCREEN_OFF_TIMEOUT, value);
349                 updateTimeoutPreferenceDescription(value);
350             } catch (NumberFormatException e) {
351                 Log.e(TAG, "could not persist screen timeout setting", e);
352             }
353         }
354         if (KEY_FONT_SIZE.equals(key)) {
355             writeFontSizePreference(objValue);
356         }
357 
358         return true;
359     }
360 
361     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
362         @Override
363         public void onReceive(Context context, Intent intent) {
364             if (intent.getAction().equals(DisplayManager.ACTION_WIFI_DISPLAY_STATUS_CHANGED)) {
365                 mWifiDisplayStatus = (WifiDisplayStatus)intent.getParcelableExtra(
366                         DisplayManager.EXTRA_WIFI_DISPLAY_STATUS);
367                 updateWifiDisplaySummary();
368             }
369         }
370     };
371 
372     @Override
373     public boolean onPreferenceClick(Preference preference) {
374         if (preference == mFontSizePref) {
375             if (Utils.hasMultipleUsers(getActivity())) {
376                 showDialog(DLG_GLOBAL_CHANGE_WARNING);
377                 return true;
378             } else {
379                 mFontSizePref.click();
380             }
381         }
382         return false;
383     }
384 }
385