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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.gallery3d.gadget;
     18 
     19 import com.android.gallery3d.R;
     20 import com.android.gallery3d.app.GalleryApp;
     21 import com.android.gallery3d.data.ContentListener;
     22 import com.android.gallery3d.data.DataManager;
     23 import com.android.gallery3d.data.MediaSet;
     24 import com.android.gallery3d.data.Path;
     25 
     26 import android.appwidget.AppWidgetManager;
     27 import android.content.Intent;
     28 import android.graphics.Bitmap;
     29 import android.net.Uri;
     30 import android.widget.RemoteViews;
     31 import android.widget.RemoteViewsService;
     32 
     33 public class WidgetService extends RemoteViewsService {
     34 
     35     @SuppressWarnings("unused")
     36     private static final String TAG = "GalleryAppWidgetService";
     37 
     38     public static final String EXTRA_WIDGET_TYPE = "widget-type";
     39     public static final String EXTRA_ALBUM_PATH = "album-path";
     40 
     41     @Override
     42     public RemoteViewsFactory onGetViewFactory(Intent intent) {
     43         int id = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
     44                 AppWidgetManager.INVALID_APPWIDGET_ID);
     45         int type = intent.getIntExtra(EXTRA_WIDGET_TYPE, 0);
     46         String albumPath = intent.getStringExtra(EXTRA_ALBUM_PATH);
     47 
     48         return new PhotoRVFactory((GalleryApp) getApplicationContext(),
     49                 id, type, albumPath);
     50     }
     51 
     52     private static class EmptySource implements WidgetSource {
     53 
     54         @Override
     55         public int size() {
     56             return 0;
     57         }
     58 
     59         @Override
     60         public Bitmap getImage(int index) {
     61             throw new UnsupportedOperationException();
     62         }
     63 
     64         @Override
     65         public Uri getContentUri(int index) {
     66             throw new UnsupportedOperationException();
     67         }
     68 
     69         @Override
     70         public void setContentListener(ContentListener listener) {}
     71 
     72         @Override
     73         public void reload() {}
     74 
     75         @Override
     76         public void close() {}
     77     }
     78 
     79     private static class PhotoRVFactory implements
     80             RemoteViewsService.RemoteViewsFactory, ContentListener {
     81 
     82         private final int mAppWidgetId;
     83         private final int mType;
     84         private final String mAlbumPath;
     85         private final GalleryApp mApp;
     86 
     87         private WidgetSource mSource;
     88 
     89         public PhotoRVFactory(GalleryApp app, int id, int type, String albumPath) {
     90             mApp = app;
     91             mAppWidgetId = id;
     92             mType = type;
     93             mAlbumPath = albumPath;
     94         }
     95 
     96         @Override
     97         public void onCreate() {
     98             if (mType == WidgetDatabaseHelper.TYPE_ALBUM) {
     99                 Path path = Path.fromString(mAlbumPath);
    100                 DataManager manager = mApp.getDataManager();
    101                 MediaSet mediaSet = (MediaSet) manager.getMediaObject(path);
    102                 mSource = mediaSet == null
    103                         ? new EmptySource()
    104                         : new MediaSetSource(mediaSet);
    105             } else {
    106                 mSource = new LocalPhotoSource(mApp.getAndroidContext());
    107             }
    108             mSource.setContentListener(this);
    109             AppWidgetManager.getInstance(mApp.getAndroidContext())
    110                     .notifyAppWidgetViewDataChanged(
    111                     mAppWidgetId, R.id.appwidget_stack_view);
    112         }
    113 
    114         @Override
    115         public void onDestroy() {
    116             mSource.close();
    117             mSource = null;
    118         }
    119 
    120         public int getCount() {
    121             return mSource.size();
    122         }
    123 
    124         public long getItemId(int position) {
    125             return position;
    126         }
    127 
    128         public int getViewTypeCount() {
    129             return 1;
    130         }
    131 
    132         public boolean hasStableIds() {
    133             return true;
    134         }
    135 
    136         public RemoteViews getLoadingView() {
    137             RemoteViews rv = new RemoteViews(
    138                     mApp.getAndroidContext().getPackageName(),
    139                     R.layout.appwidget_loading_item);
    140             rv.setProgressBar(R.id.appwidget_loading_item, 0, 0, true);
    141             return rv;
    142         }
    143 
    144         public RemoteViews getViewAt(int position) {
    145             Bitmap bitmap = mSource.getImage(position);
    146             if (bitmap == null) return getLoadingView();
    147             RemoteViews views = new RemoteViews(
    148                     mApp.getAndroidContext().getPackageName(),
    149                     R.layout.appwidget_photo_item);
    150             views.setImageViewBitmap(R.id.appwidget_photo_item, bitmap);
    151             views.setOnClickFillInIntent(R.id.appwidget_photo_item, new Intent()
    152                     .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
    153                     .setData(mSource.getContentUri(position)));
    154             return views;
    155         }
    156 
    157         @Override
    158         public void onDataSetChanged() {
    159             mSource.reload();
    160         }
    161 
    162         @Override
    163         public void onContentDirty() {
    164             AppWidgetManager.getInstance(mApp.getAndroidContext())
    165                     .notifyAppWidgetViewDataChanged(
    166                     mAppWidgetId, R.id.appwidget_stack_view);
    167         }
    168     }
    169 }
    170