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      1 /*
      2  * Copyright (C) 2008 Esmertec AG.
      3  * Copyright (C) 2008 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.mms.ui;
     19 
     20 import android.content.Context;
     21 
     22 import com.android.mms.model.AudioModel;
     23 import com.android.mms.model.ImageModel;
     24 import com.android.mms.model.Model;
     25 import com.android.mms.model.SlideModel;
     26 import com.android.mms.model.SlideshowModel;
     27 import com.android.mms.model.VideoModel;
     28 import com.android.mms.util.ItemLoadedCallback;
     29 import com.android.mms.util.ItemLoadedFuture;
     30 import com.android.mms.util.ThumbnailManager.ImageLoaded;
     31 
     32 public class MmsThumbnailPresenter extends Presenter {
     33     private static final String TAG = "MmsThumbnailPresenter";
     34     private ItemLoadedCallback mOnLoadedCallback;
     35     private ItemLoadedFuture mItemLoadedFuture;
     36 
     37     public MmsThumbnailPresenter(Context context, ViewInterface view, Model model) {
     38         super(context, view, model);
     39     }
     40 
     41     @Override
     42     public void present(ItemLoadedCallback callback) {
     43         mOnLoadedCallback = callback;
     44         SlideModel slide = ((SlideshowModel) mModel).get(0);
     45         if (slide != null) {
     46             presentFirstSlide((SlideViewInterface) mView, slide);
     47         }
     48     }
     49 
     50     private void presentFirstSlide(SlideViewInterface view, SlideModel slide) {
     51         view.reset();
     52 
     53         if (slide.hasImage()) {
     54             presentImageThumbnail(view, slide.getImage());
     55         } else if (slide.hasVideo()) {
     56             presentVideoThumbnail(view, slide.getVideo());
     57         } else if (slide.hasAudio()) {
     58             presentAudioThumbnail(view, slide.getAudio());
     59         }
     60     }
     61 
     62     private ItemLoadedCallback<ImageLoaded> mImageLoadedCallback =
     63             new ItemLoadedCallback<ImageLoaded>() {
     64         public void onItemLoaded(ImageLoaded imageLoaded, Throwable exception) {
     65             if (exception == null) {
     66                 if (mItemLoadedFuture != null) {
     67                     synchronized(mItemLoadedFuture) {
     68                         mItemLoadedFuture.setIsDone(true);
     69                     }
     70                 }
     71                 if (mOnLoadedCallback != null) {
     72                     mOnLoadedCallback.onItemLoaded(imageLoaded, exception);
     73                 } else {
     74                     // Right now we're only handling image and video loaded callbacks.
     75                     SlideModel slide = ((SlideshowModel) mModel).get(0);
     76                     if (slide != null) {
     77                         if (slide.hasVideo() && imageLoaded.mIsVideo) {
     78                             ((SlideViewInterface)mView).setVideoThumbnail(null,
     79                                     imageLoaded.mBitmap);
     80                         } else if (slide.hasImage() && !imageLoaded.mIsVideo) {
     81                             ((SlideViewInterface)mView).setImage(null, imageLoaded.mBitmap);
     82                         }
     83                     }
     84                 }
     85             }
     86         }
     87     };
     88 
     89     private void presentVideoThumbnail(SlideViewInterface view, VideoModel video) {
     90         mItemLoadedFuture = video.loadThumbnailBitmap(mImageLoadedCallback);
     91     }
     92 
     93     private void presentImageThumbnail(SlideViewInterface view, ImageModel image) {
     94         mItemLoadedFuture = image.loadThumbnailBitmap(mImageLoadedCallback);
     95     }
     96 
     97     protected void presentAudioThumbnail(SlideViewInterface view, AudioModel audio) {
     98         view.setAudio(audio.getUri(), audio.getSrc(), audio.getExtras());
     99     }
    100 
    101     public void onModelChanged(Model model, boolean dataChanged) {
    102         // TODO Auto-generated method stub
    103     }
    104 
    105     public void cancelBackgroundLoading() {
    106         // Currently we only support background loading of thumbnails. If we extend background
    107         // loading to other media types, we should add a cancelLoading API to Model.
    108         SlideModel slide = ((SlideshowModel) mModel).get(0);
    109         if (slide != null && slide.hasImage()) {
    110             slide.getImage().cancelThumbnailLoading();
    111         }
    112     }
    113 
    114 }
    115