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      1 /*
      2  * Copyright (C) 2012 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 android.app.Activity;
     20 import android.app.AlertDialog;
     21 import android.app.Dialog;
     22 import android.content.BroadcastReceiver;
     23 import android.content.Context;
     24 import android.content.DialogInterface;
     25 import android.content.Intent;
     26 import android.content.IntentFilter;
     27 import android.os.Bundle;
     28 import android.util.Log;
     29 import android.view.LayoutInflater;
     30 import android.view.Menu;
     31 import android.view.MenuInflater;
     32 import android.view.MenuItem;
     33 import android.view.MenuItem.OnMenuItemClickListener;
     34 import android.view.MotionEvent;
     35 import android.view.View;
     36 import android.view.View.OnClickListener;
     37 import android.view.View.OnTouchListener;
     38 import android.view.ViewGroup;
     39 import android.widget.ArrayAdapter;
     40 import android.widget.ImageView;
     41 import android.widget.ListView;
     42 import android.widget.RadioButton;
     43 import android.widget.Switch;
     44 import android.widget.TextView;
     45 
     46 import com.android.settings.DreamBackend.DreamInfo;
     47 import com.android.settings.widget.SwitchBar;
     48 
     49 import java.util.List;
     50 
     51 public class DreamSettings extends SettingsPreferenceFragment implements
     52         SwitchBar.OnSwitchChangeListener {
     53     private static final String TAG = DreamSettings.class.getSimpleName();
     54     static final boolean DEBUG = false;
     55     private static final int DIALOG_WHEN_TO_DREAM = 1;
     56     private static final String PACKAGE_SCHEME = "package";
     57 
     58     private final PackageReceiver mPackageReceiver = new PackageReceiver();
     59 
     60     private Context mContext;
     61     private DreamBackend mBackend;
     62     private DreamInfoAdapter mAdapter;
     63     private SwitchBar mSwitchBar;
     64     private MenuItem[] mMenuItemsWhenEnabled;
     65     private boolean mRefreshing;
     66 
     67     @Override
     68     public int getHelpResource() {
     69         return R.string.help_url_dreams;
     70     }
     71 
     72     @Override
     73     public void onAttach(Activity activity) {
     74         logd("onAttach(%s)", activity.getClass().getSimpleName());
     75         super.onAttach(activity);
     76         mContext = activity;
     77     }
     78 
     79     @Override
     80     public void onCreate(Bundle icicle) {
     81         logd("onCreate(%s)", icicle);
     82         super.onCreate(icicle);
     83 
     84         mBackend = new DreamBackend(getActivity());
     85 
     86         setHasOptionsMenu(true);
     87     }
     88 
     89     @Override
     90     public void onSwitchChanged(Switch switchView, boolean isChecked) {
     91         if (!mRefreshing) {
     92             mBackend.setEnabled(isChecked);
     93             refreshFromBackend();
     94         }
     95     }
     96 
     97     @Override
     98     public void onStart() {
     99         logd("onStart()");
    100         super.onStart();
    101     }
    102 
    103     @Override
    104     public void onDestroyView() {
    105         logd("onDestroyView()");
    106         super.onDestroyView();
    107 
    108         mSwitchBar.removeOnSwitchChangeListener(this);
    109         mSwitchBar.hide();
    110     }
    111 
    112     @Override
    113     public void onActivityCreated(Bundle savedInstanceState) {
    114         logd("onActivityCreated(%s)", savedInstanceState);
    115         super.onActivityCreated(savedInstanceState);
    116 
    117         ListView listView = getListView();
    118         listView.setItemsCanFocus(true);
    119 
    120         TextView emptyView = (TextView) getView().findViewById(android.R.id.empty);
    121         emptyView.setText(R.string.screensaver_settings_disabled_prompt);
    122         listView.setEmptyView(emptyView);
    123 
    124         mAdapter = new DreamInfoAdapter(mContext);
    125         listView.setAdapter(mAdapter);
    126 
    127         final SettingsActivity sa = (SettingsActivity) getActivity();
    128         mSwitchBar = sa.getSwitchBar();
    129         mSwitchBar.addOnSwitchChangeListener(this);
    130         mSwitchBar.show();
    131     }
    132 
    133     @Override
    134     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    135         logd("onCreateOptionsMenu()");
    136 
    137         boolean isEnabled = mBackend.isEnabled();
    138 
    139         // create "start" action
    140         MenuItem start = createMenuItem(menu, R.string.screensaver_settings_dream_start,
    141                 MenuItem.SHOW_AS_ACTION_NEVER,
    142                 isEnabled, new Runnable(){
    143                     @Override
    144                     public void run() {
    145                         mBackend.startDreaming();
    146                     }});
    147 
    148         // create "when to dream" overflow menu item
    149         MenuItem whenToDream = createMenuItem(menu,
    150                 R.string.screensaver_settings_when_to_dream,
    151                 MenuItem.SHOW_AS_ACTION_NEVER,
    152                 isEnabled,
    153                 new Runnable() {
    154                     @Override
    155                     public void run() {
    156                         showDialog(DIALOG_WHEN_TO_DREAM);
    157                     }});
    158 
    159         // create "help" overflow menu item (make sure it appears last)
    160         super.onCreateOptionsMenu(menu, inflater);
    161 
    162         mMenuItemsWhenEnabled = new MenuItem[] { start, whenToDream };
    163     }
    164 
    165     private MenuItem createMenuItem(Menu menu,
    166             int titleRes, int actionEnum, boolean isEnabled, final Runnable onClick) {
    167         MenuItem item = menu.add(titleRes);
    168         item.setShowAsAction(actionEnum);
    169         item.setEnabled(isEnabled);
    170         item.setOnMenuItemClickListener(new OnMenuItemClickListener() {
    171             @Override
    172             public boolean onMenuItemClick(MenuItem item) {
    173                 onClick.run();
    174                 return true;
    175             }
    176         });
    177         return item;
    178     }
    179 
    180     @Override
    181     public Dialog onCreateDialog(int dialogId) {
    182         logd("onCreateDialog(%s)", dialogId);
    183         if (dialogId == DIALOG_WHEN_TO_DREAM)
    184             return createWhenToDreamDialog();
    185         return super.onCreateDialog(dialogId);
    186     }
    187 
    188     private Dialog createWhenToDreamDialog() {
    189         final CharSequence[] items = {
    190                 mContext.getString(R.string.screensaver_settings_summary_dock),
    191                 mContext.getString(R.string.screensaver_settings_summary_sleep),
    192                 mContext.getString(R.string.screensaver_settings_summary_either_short)
    193         };
    194 
    195         int initialSelection = mBackend.isActivatedOnDock() && mBackend.isActivatedOnSleep() ? 2
    196                 : mBackend.isActivatedOnDock() ? 0
    197                 : mBackend.isActivatedOnSleep() ? 1
    198                 : -1;
    199 
    200         return new AlertDialog.Builder(mContext)
    201                 .setTitle(R.string.screensaver_settings_when_to_dream)
    202                 .setSingleChoiceItems(items, initialSelection, new DialogInterface.OnClickListener() {
    203                     public void onClick(DialogInterface dialog, int item) {
    204                         mBackend.setActivatedOnDock(item == 0 || item == 2);
    205                         mBackend.setActivatedOnSleep(item == 1 || item == 2);
    206                         dialog.dismiss();
    207                     }
    208                 })
    209                 .create();
    210     }
    211 
    212     @Override
    213     public void onPause() {
    214         logd("onPause()");
    215         super.onPause();
    216 
    217         mContext.unregisterReceiver(mPackageReceiver);
    218     }
    219 
    220     @Override
    221     public void onResume() {
    222         logd("onResume()");
    223         super.onResume();
    224         refreshFromBackend();
    225 
    226         // listen for package changes
    227         IntentFilter filter = new IntentFilter();
    228         filter.addAction(Intent.ACTION_PACKAGE_ADDED);
    229         filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
    230         filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
    231         filter.addAction(Intent.ACTION_PACKAGE_REPLACED);
    232         filter.addDataScheme(PACKAGE_SCHEME);
    233         mContext.registerReceiver(mPackageReceiver , filter);
    234     }
    235 
    236     public static int getSummaryResource(Context context) {
    237         DreamBackend backend = new DreamBackend(context);
    238         boolean isEnabled = backend.isEnabled();
    239         boolean activatedOnSleep = backend.isActivatedOnSleep();
    240         boolean activatedOnDock = backend.isActivatedOnDock();
    241         boolean activatedOnEither = activatedOnSleep && activatedOnDock;
    242         return !isEnabled ? R.string.screensaver_settings_summary_off
    243                 : activatedOnEither ? R.string.screensaver_settings_summary_either_long
    244                 : activatedOnSleep ? R.string.screensaver_settings_summary_sleep
    245                 : activatedOnDock ? R.string.screensaver_settings_summary_dock
    246                 : 0;
    247     }
    248 
    249     public static CharSequence getSummaryTextWithDreamName(Context context) {
    250         DreamBackend backend = new DreamBackend(context);
    251         boolean isEnabled = backend.isEnabled();
    252         if (!isEnabled) {
    253             return context.getString(R.string.screensaver_settings_summary_off);
    254         } else {
    255             return backend.getActiveDreamName();
    256         }
    257     }
    258 
    259     private void refreshFromBackend() {
    260         logd("refreshFromBackend()");
    261         mRefreshing = true;
    262         boolean dreamsEnabled = mBackend.isEnabled();
    263         if (mSwitchBar.isChecked() != dreamsEnabled)
    264             mSwitchBar.setChecked(dreamsEnabled);
    265 
    266         mAdapter.clear();
    267         if (dreamsEnabled) {
    268             List<DreamInfo> dreamInfos = mBackend.getDreamInfos();
    269             mAdapter.addAll(dreamInfos);
    270         }
    271         if (mMenuItemsWhenEnabled != null)
    272             for (MenuItem menuItem : mMenuItemsWhenEnabled)
    273                 menuItem.setEnabled(dreamsEnabled);
    274         mRefreshing = false;
    275     }
    276 
    277     private static void logd(String msg, Object... args) {
    278         if (DEBUG)
    279             Log.d(TAG, args == null || args.length == 0 ? msg : String.format(msg, args));
    280     }
    281 
    282     private class DreamInfoAdapter extends ArrayAdapter<DreamInfo> {
    283         private final LayoutInflater mInflater;
    284 
    285         public DreamInfoAdapter(Context context) {
    286             super(context, 0);
    287             mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    288         }
    289 
    290         @Override
    291         public View getView(int position, View convertView, ViewGroup parent) {
    292             DreamInfo dreamInfo = getItem(position);
    293             logd("getView(%s)", dreamInfo.caption);
    294             final View row = convertView != null ? convertView : createDreamInfoRow(parent);
    295             row.setTag(dreamInfo);
    296 
    297             // bind icon
    298             ((ImageView) row.findViewById(android.R.id.icon)).setImageDrawable(dreamInfo.icon);
    299 
    300             // bind caption
    301             ((TextView) row.findViewById(android.R.id.title)).setText(dreamInfo.caption);
    302 
    303             // bind radio button
    304             RadioButton radioButton = (RadioButton) row.findViewById(android.R.id.button1);
    305             radioButton.setChecked(dreamInfo.isActive);
    306             radioButton.setOnTouchListener(new OnTouchListener() {
    307                 @Override
    308                 public boolean onTouch(View v, MotionEvent event) {
    309                     row.onTouchEvent(event);
    310                     return false;
    311                 }});
    312 
    313             // bind settings button + divider
    314             boolean showSettings = dreamInfo.settingsComponentName != null;
    315             View settingsDivider = row.findViewById(R.id.divider);
    316             settingsDivider.setVisibility(showSettings ? View.VISIBLE : View.INVISIBLE);
    317 
    318             ImageView settingsButton = (ImageView) row.findViewById(android.R.id.button2);
    319             settingsButton.setVisibility(showSettings ? View.VISIBLE : View.INVISIBLE);
    320             settingsButton.setAlpha(dreamInfo.isActive ? 1f : Utils.DISABLED_ALPHA);
    321             settingsButton.setEnabled(dreamInfo.isActive);
    322             settingsButton.setFocusable(dreamInfo.isActive);
    323             settingsButton.setOnClickListener(new OnClickListener(){
    324                 @Override
    325                 public void onClick(View v) {
    326                     mBackend.launchSettings((DreamInfo) row.getTag());
    327                 }});
    328 
    329             return row;
    330         }
    331 
    332         private View createDreamInfoRow(ViewGroup parent) {
    333             final View row =  mInflater.inflate(R.layout.dream_info_row, parent, false);
    334             final View header = row.findViewById(android.R.id.widget_frame);
    335             header.setOnClickListener(new OnClickListener(){
    336                 @Override
    337                 public void onClick(View v) {
    338                     v.setPressed(true);
    339                     activate((DreamInfo) row.getTag());
    340                 }});
    341             return row;
    342         }
    343 
    344         private DreamInfo getCurrentSelection() {
    345             for (int i = 0; i < getCount(); i++) {
    346                 DreamInfo dreamInfo = getItem(i);
    347                 if (dreamInfo.isActive)
    348                     return dreamInfo;
    349             }
    350             return null;
    351         }
    352         private void activate(DreamInfo dreamInfo) {
    353             if (dreamInfo.equals(getCurrentSelection()))
    354                 return;
    355             for (int i = 0; i < getCount(); i++) {
    356                 getItem(i).isActive = false;
    357             }
    358             dreamInfo.isActive = true;
    359             mBackend.setActiveDream(dreamInfo.componentName);
    360             notifyDataSetChanged();
    361         }
    362     }
    363 
    364     private class PackageReceiver extends BroadcastReceiver {
    365         @Override
    366         public void onReceive(Context context, Intent intent) {
    367             logd("PackageReceiver.onReceive");
    368             refreshFromBackend();
    369         }
    370     }
    371 }
    372