1/*
2 * Copyright (C) 2013 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.gallery3d.ingest.adapter;
18
19import com.android.gallery3d.R;
20import com.android.gallery3d.ingest.data.IngestObjectInfo;
21import com.android.gallery3d.ingest.data.MtpDeviceIndex;
22import com.android.gallery3d.ingest.data.MtpDeviceIndex.SortOrder;
23import com.android.gallery3d.ingest.data.SimpleDate;
24import com.android.gallery3d.ingest.ui.DateTileView;
25import com.android.gallery3d.ingest.ui.MtpThumbnailTileView;
26
27import android.annotation.TargetApi;
28import android.app.Activity;
29import android.content.Context;
30import android.os.Build;
31import android.view.LayoutInflater;
32import android.view.View;
33import android.view.ViewGroup;
34import android.widget.BaseAdapter;
35import android.widget.SectionIndexer;
36
37/**
38 * Adapter for MTP thumbnail grid.
39 */
40@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1)
41public class MtpAdapter extends BaseAdapter implements SectionIndexer {
42  public static final int ITEM_TYPE_MEDIA = 0;
43  public static final int ITEM_TYPE_BUCKET = 1;
44
45  @SuppressWarnings("unused")
46  private Context mContext;
47  private MtpDeviceIndex mModel;
48  private SortOrder mSortOrder = SortOrder.DESCENDING;
49  private LayoutInflater mInflater;
50  private int mGeneration = 0;
51
52  public MtpAdapter(Activity context) {
53    super();
54    mContext = context;
55    mInflater = LayoutInflater.from(context);
56  }
57
58  public void setMtpDeviceIndex(MtpDeviceIndex index) {
59    mModel = index;
60    notifyDataSetChanged();
61  }
62
63  public MtpDeviceIndex getMtpDeviceIndex() {
64    return mModel;
65  }
66
67  @Override
68  public void notifyDataSetChanged() {
69    mGeneration++;
70    super.notifyDataSetChanged();
71  }
72
73  @Override
74  public void notifyDataSetInvalidated() {
75    mGeneration++;
76    super.notifyDataSetInvalidated();
77  }
78
79  public boolean deviceConnected() {
80    return (mModel != null) && mModel.isDeviceConnected();
81  }
82
83  public boolean indexReady() {
84    return (mModel != null) && mModel.isIndexReady();
85  }
86
87  @Override
88  public int getCount() {
89    return mModel != null ? mModel.size() : 0;
90  }
91
92  @Override
93  public Object getItem(int position) {
94    return mModel.get(position, mSortOrder);
95  }
96
97  @Override
98  public boolean areAllItemsEnabled() {
99    return true;
100  }
101
102  @Override
103  public boolean isEnabled(int position) {
104    return true;
105  }
106
107  @Override
108  public long getItemId(int position) {
109    return position;
110  }
111
112  @Override
113  public int getViewTypeCount() {
114    return 2;
115  }
116
117  @Override
118  public int getItemViewType(int position) {
119    // If the position is the first in its section, then it corresponds to
120    // a title tile, if not it's a media tile
121    if (position == getPositionForSection(getSectionForPosition(position))) {
122      return ITEM_TYPE_BUCKET;
123    } else {
124      return ITEM_TYPE_MEDIA;
125    }
126  }
127
128  public boolean itemAtPositionIsBucket(int position) {
129    return getItemViewType(position) == ITEM_TYPE_BUCKET;
130  }
131
132  public boolean itemAtPositionIsMedia(int position) {
133    return getItemViewType(position) == ITEM_TYPE_MEDIA;
134  }
135
136  @Override
137  public View getView(int position, View convertView, ViewGroup parent) {
138    int type = getItemViewType(position);
139    if (type == ITEM_TYPE_MEDIA) {
140      MtpThumbnailTileView imageView;
141      if (convertView == null) {
142        imageView = (MtpThumbnailTileView) mInflater.inflate(
143            R.layout.ingest_thumbnail, parent, false);
144      } else {
145        imageView = (MtpThumbnailTileView) convertView;
146      }
147      imageView.setMtpDeviceAndObjectInfo(mModel.getDevice(),
148          (IngestObjectInfo) getItem(position), mGeneration);
149      return imageView;
150    } else {
151      DateTileView dateTile;
152      if (convertView == null) {
153        dateTile = (DateTileView) mInflater.inflate(
154            R.layout.ingest_date_tile, parent, false);
155      } else {
156        dateTile = (DateTileView) convertView;
157      }
158      dateTile.setDate((SimpleDate) getItem(position));
159      return dateTile;
160    }
161  }
162
163  @Override
164  public int getPositionForSection(int section) {
165    if (getCount() == 0) {
166      return 0;
167    }
168    int numSections = getSections().length;
169    if (section >= numSections) {
170      section = numSections - 1;
171    }
172    return mModel.getFirstPositionForBucketNumber(section, mSortOrder);
173  }
174
175  @Override
176  public int getSectionForPosition(int position) {
177    int count = getCount();
178    if (count == 0) {
179      return 0;
180    }
181    if (position >= count) {
182      position = count - 1;
183    }
184    return mModel.getBucketNumberForPosition(position, mSortOrder);
185  }
186
187  @Override
188  public Object[] getSections() {
189    return getCount() > 0 ? mModel.getBuckets(mSortOrder) : null;
190  }
191
192  public SortOrder getSortOrder() {
193    return mSortOrder;
194  }
195
196  public int translatePositionWithoutLabels(int position) {
197    if (mModel == null) {
198      return -1;
199    }
200    return mModel.getPositionFromPositionWithoutLabels(position, mSortOrder);
201  }
202}
203