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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 package com.android.dreams.phototable;
     17 
     18 import android.app.ListActivity;
     19 import android.content.SharedPreferences;
     20 import android.database.DataSetObserver;
     21 import android.os.AsyncTask;
     22 import android.os.AsyncTask.Status;
     23 import android.os.Bundle;
     24 import android.view.Menu;
     25 import android.view.MenuInflater;
     26 import android.view.MenuItem;
     27 import android.view.View;
     28 
     29 import java.util.LinkedList;
     30 
     31 /**
     32  * Settings panel for photo flipping dream.
     33  */
     34 public class FlipperDreamSettings extends ListActivity {
     35     @SuppressWarnings("unused")
     36     private static final String TAG = "FlipperDreamSettings";
     37     public static final String PREFS_NAME = FlipperDream.TAG;
     38 
     39     protected SharedPreferences mSettings;
     40 
     41     private PhotoSourcePlexor mPhotoSource;
     42     private SectionedAlbumDataAdapter mAdapter;
     43     private MenuItem mSelectAll;
     44     private AsyncTask<Void, Void, Void> mLoadingTask;
     45 
     46     @Override
     47     protected void onCreate(Bundle savedInstanceState){
     48         super.onCreate(savedInstanceState);
     49         mSettings = getSharedPreferences(PREFS_NAME, 0);
     50         init();
     51     }
     52 
     53     @Override
     54     protected void onResume(){
     55         super.onResume();
     56         init();
     57     }
     58 
     59     protected void init() {
     60         mPhotoSource = new PhotoSourcePlexor(this, mSettings);
     61         setContentView(R.layout.settingslist);
     62         if (mLoadingTask != null && mLoadingTask.getStatus() != Status.FINISHED) {
     63             mLoadingTask.cancel(true);
     64         }
     65         showApology(false);
     66         mLoadingTask = new AsyncTask<Void, Void, Void>() {
     67             @Override
     68             public Void doInBackground(Void... unused) {
     69                 mAdapter = new SectionedAlbumDataAdapter(FlipperDreamSettings.this,
     70                         mSettings,
     71                         R.layout.header,
     72                         R.layout.album,
     73                         new LinkedList<PhotoSource.AlbumData>(mPhotoSource.findAlbums()));
     74                 return null;
     75             }
     76 
     77            @Override
     78            public void onPostExecute(Void unused) {
     79                mAdapter.registerDataSetObserver(new DataSetObserver () {
     80                        @Override
     81                        public void onChanged() {
     82                            updateActionItem();
     83                        }
     84                        @Override
     85                        public void onInvalidated() {
     86                            updateActionItem();
     87                        }
     88                    });
     89                setListAdapter(mAdapter);
     90                getListView().setItemsCanFocus(true);
     91                updateActionItem();
     92                showApology(mAdapter.getCount() == 0);
     93            }
     94         };
     95         mLoadingTask.execute();
     96     }
     97 
     98     @Override
     99     public boolean onCreateOptionsMenu(Menu menu) {
    100         MenuInflater inflater = getMenuInflater();
    101         inflater.inflate(R.menu.photodream_settings_menu, menu);
    102         mSelectAll = menu.findItem(R.id.photodream_menu_all);
    103         updateActionItem();
    104         return true;
    105     }
    106 
    107     @Override
    108     public boolean onOptionsItemSelected(MenuItem item) {
    109         switch (item.getItemId()) {
    110         case R.id.photodream_menu_all:
    111             if (mAdapter != null) {
    112                 mAdapter.selectAll(!mAdapter.areAllSelected());
    113             }
    114             return true;
    115         default:
    116             return super.onOptionsItemSelected(item);
    117         }
    118     }
    119 
    120     private void showApology(boolean apologize) {
    121         View empty = findViewById(R.id.spinner);
    122         View sorry = findViewById(R.id.sorry);
    123         if (empty != null && sorry != null) {
    124             empty.setVisibility(apologize ? View.GONE : View.VISIBLE);
    125             sorry.setVisibility(apologize ? View.VISIBLE : View.GONE);
    126         }
    127     }
    128 
    129     private void updateActionItem() {
    130         if (mAdapter != null && mSelectAll != null) {
    131             if (mAdapter.areAllSelected()) {
    132                 mSelectAll.setTitle(R.string.photodream_select_none);
    133             } else {
    134                 mSelectAll.setTitle(R.string.photodream_select_all);
    135             }
    136         }
    137     }
    138 }
    139