DisplaySettings.java revision c825bc8e17cb60cae88397ab77d1e2711c086624 
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
17package com.android.settings;
18
19import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
20
21import android.app.ActivityManagerNative;
22import android.app.Dialog;
23import android.app.admin.DevicePolicyManager;
24import android.content.BroadcastReceiver;
25import android.content.ContentResolver;
26import android.content.Context;
27import android.content.Intent;
28import android.content.IntentFilter;
29import android.content.res.Configuration;
30import android.content.res.Resources;
31import android.hardware.display.DisplayManager;
32import android.hardware.display.WifiDisplay;
33import android.hardware.display.WifiDisplayStatus;
34import android.os.Bundle;
35import android.os.RemoteException;
36import android.preference.CheckBoxPreference;
37import android.preference.ListPreference;
38import android.preference.Preference;
39import android.preference.Preference.OnPreferenceClickListener;
40import android.preference.PreferenceScreen;
41import android.provider.Settings;
42import android.provider.Settings.SettingNotFoundException;
43import android.util.AttributeSet;
44import android.util.Log;
45
46import com.android.internal.view.RotationPolicy;
47import com.android.settings.DreamSettings;
48
49import java.util.ArrayList;
50
51public 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
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_enableDreams) == 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
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            int best = 0;
158            for (int i = 0; i < values.length; i++) {
159                long timeout = Long.parseLong(values[i].toString());
160                if (currentTimeout >= timeout) {
161                    best = i;
162                }
163            }
164            summary = preference.getContext().getString(R.string.screen_timeout_summary,
165                    entries[best]);
166        }
167        preference.setSummary(summary);
168    }
169
170    private void disableUnusableTimeouts(ListPreference screenTimeoutPreference) {
171        final DevicePolicyManager dpm =
172                (DevicePolicyManager) getActivity().getSystemService(
173                Context.DEVICE_POLICY_SERVICE);
174        final long maxTimeout = dpm != null ? dpm.getMaximumTimeToLock(null) : 0;
175        if (maxTimeout == 0) {
176            return; // policy not enforced
177        }
178        final CharSequence[] entries = screenTimeoutPreference.getEntries();
179        final CharSequence[] values = screenTimeoutPreference.getEntryValues();
180        ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>();
181        ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>();
182        for (int i = 0; i < values.length; i++) {
183            long timeout = Long.parseLong(values[i].toString());
184            if (timeout <= maxTimeout) {
185                revisedEntries.add(entries[i]);
186                revisedValues.add(values[i]);
187            }
188        }
189        if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
190            screenTimeoutPreference.setEntries(
191                    revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
192            screenTimeoutPreference.setEntryValues(
193                    revisedValues.toArray(new CharSequence[revisedValues.size()]));
194            final int userPreference = Integer.parseInt(screenTimeoutPreference.getValue());
195            if (userPreference <= maxTimeout) {
196                screenTimeoutPreference.setValue(String.valueOf(userPreference));
197            } else {
198                // There will be no highlighted selection since nothing in the list matches
199                // maxTimeout. The user can still select anything less than maxTimeout.
200                // TODO: maybe append maxTimeout to the list and mark selected.
201            }
202        }
203        screenTimeoutPreference.setEnabled(revisedEntries.size() > 0);
204    }
205
206    int floatToIndex(float val) {
207        String[] indices = getResources().getStringArray(R.array.entryvalues_font_size);
208        float lastVal = Float.parseFloat(indices[0]);
209        for (int i=1; i<indices.length; i++) {
210            float thisVal = Float.parseFloat(indices[i]);
211            if (val < (lastVal + (thisVal-lastVal)*.5f)) {
212                return i-1;
213            }
214            lastVal = thisVal;
215        }
216        return indices.length-1;
217    }
218
219    public void readFontSizePreference(ListPreference pref) {
220        try {
221            mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration());
222        } catch (RemoteException e) {
223            Log.w(TAG, "Unable to retrieve font size");
224        }
225
226        // mark the appropriate item in the preferences list
227        int index = floatToIndex(mCurConfig.fontScale);
228        pref.setValueIndex(index);
229
230        // report the current size in the summary text
231        final Resources res = getResources();
232        String[] fontSizeNames = res.getStringArray(R.array.entries_font_size);
233        pref.setSummary(String.format(res.getString(R.string.summary_font_size),
234                fontSizeNames[index]));
235    }
236
237    @Override
238    public void onResume() {
239        super.onResume();
240
241        RotationPolicy.registerRotationPolicyListener(getActivity(),
242                mRotationPolicyListener);
243
244        if (mWifiDisplayPreference != null) {
245            getActivity().registerReceiver(mReceiver, new IntentFilter(
246                    DisplayManager.ACTION_WIFI_DISPLAY_STATUS_CHANGED));
247            mWifiDisplayStatus = mDisplayManager.getWifiDisplayStatus();
248        }
249
250        updateState();
251    }
252
253    @Override
254    public void onPause() {
255        super.onPause();
256
257        RotationPolicy.unregisterRotationPolicyListener(getActivity(),
258                mRotationPolicyListener);
259
260        if (mWifiDisplayPreference != null) {
261            getActivity().unregisterReceiver(mReceiver);
262        }
263    }
264
265    @Override
266    public Dialog onCreateDialog(int dialogId) {
267        if (dialogId == DLG_GLOBAL_CHANGE_WARNING) {
268            return Utils.buildGlobalChangeWarningDialog(getActivity(),
269                    R.string.global_font_change_title,
270                    new Runnable() {
271                        public void run() {
272                            mFontSizePref.click();
273                        }
274                    });
275        }
276        return null;
277    }
278
279    private void updateState() {
280        updateAccelerometerRotationCheckbox();
281        readFontSizePreference(mFontSizePref);
282        updateScreenSaverSummary();
283        updateWifiDisplaySummary();
284    }
285
286    private void updateScreenSaverSummary() {
287        if (mScreenSaverPreference != null) {
288            mScreenSaverPreference.setSummary(
289                    DreamSettings.getSummaryTextWithDreamName(getActivity()));
290        }
291    }
292
293    private void updateWifiDisplaySummary() {
294        if (mWifiDisplayPreference != null) {
295            switch (mWifiDisplayStatus.getFeatureState()) {
296                case WifiDisplayStatus.FEATURE_STATE_OFF:
297                    mWifiDisplayPreference.setSummary(R.string.wifi_display_summary_off);
298                    break;
299                case WifiDisplayStatus.FEATURE_STATE_ON:
300                    mWifiDisplayPreference.setSummary(R.string.wifi_display_summary_on);
301                    break;
302                case WifiDisplayStatus.FEATURE_STATE_DISABLED:
303                default:
304                    mWifiDisplayPreference.setSummary(R.string.wifi_display_summary_disabled);
305                    break;
306            }
307        }
308    }
309
310    private void updateAccelerometerRotationCheckbox() {
311        if (getActivity() == null) return;
312
313        mAccelerometer.setChecked(!RotationPolicy.isRotationLocked(getActivity()));
314    }
315
316    public void writeFontSizePreference(Object objValue) {
317        try {
318            mCurConfig.fontScale = Float.parseFloat(objValue.toString());
319            ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
320        } catch (RemoteException e) {
321            Log.w(TAG, "Unable to save font size");
322        }
323    }
324
325    @Override
326    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
327        if (preference == mAccelerometer) {
328            RotationPolicy.setRotationLockForAccessibility(
329                    getActivity(), !mAccelerometer.isChecked());
330        } else if (preference == mNotificationPulse) {
331            boolean value = mNotificationPulse.isChecked();
332            Settings.System.putInt(getContentResolver(), Settings.System.NOTIFICATION_LIGHT_PULSE,
333                    value ? 1 : 0);
334            return true;
335        }
336        return super.onPreferenceTreeClick(preferenceScreen, preference);
337    }
338
339    public boolean onPreferenceChange(Preference preference, Object objValue) {
340        final String key = preference.getKey();
341        if (KEY_SCREEN_TIMEOUT.equals(key)) {
342            int value = Integer.parseInt((String) objValue);
343            try {
344                Settings.System.putInt(getContentResolver(), SCREEN_OFF_TIMEOUT, value);
345                updateTimeoutPreferenceDescription(value);
346            } catch (NumberFormatException e) {
347                Log.e(TAG, "could not persist screen timeout setting", e);
348            }
349        }
350        if (KEY_FONT_SIZE.equals(key)) {
351            writeFontSizePreference(objValue);
352        }
353
354        return true;
355    }
356
357    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
358        @Override
359        public void onReceive(Context context, Intent intent) {
360            if (intent.getAction().equals(DisplayManager.ACTION_WIFI_DISPLAY_STATUS_CHANGED)) {
361                mWifiDisplayStatus = (WifiDisplayStatus)intent.getParcelableExtra(
362                        DisplayManager.EXTRA_WIFI_DISPLAY_STATUS);
363                updateWifiDisplaySummary();
364            }
365        }
366    };
367
368    @Override
369    public boolean onPreferenceClick(Preference preference) {
370        if (preference == mFontSizePref) {
371            if (Utils.hasMultipleUsers(getActivity())) {
372                showDialog(DLG_GLOBAL_CHANGE_WARNING);
373                return true;
374            } else {
375                mFontSizePref.click();
376            }
377        }
378        return false;
379    }
380}
381