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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.LogTag;
     23 import com.android.mms.model.AudioModel;
     24 import com.android.mms.model.ImageModel;
     25 import com.android.mms.model.Model;
     26 import com.android.mms.model.SlideModel;
     27 import com.android.mms.model.SlideshowModel;
     28 import com.android.mms.model.VideoModel;
     29 import com.android.mms.util.ItemLoadedCallback;
     30 import com.android.mms.util.ItemLoadedFuture;
     31 import com.android.mms.util.ThumbnailManager.ImageLoaded;
     32 
     33 public class MmsThumbnailPresenter extends Presenter {
     34     private static final String TAG = LogTag.TAG;
     35     private ItemLoadedCallback mOnLoadedCallback;
     36     private ItemLoadedFuture mItemLoadedFuture;
     37 
     38     public MmsThumbnailPresenter(Context context, ViewInterface view, Model model) {
     39         super(context, view, model);
     40     }
     41 
     42     @Override
     43     public void present(ItemLoadedCallback callback) {
     44         mOnLoadedCallback = callback;
     45         SlideModel slide = ((SlideshowModel) mModel).get(0);
     46         if (slide != null) {
     47             presentFirstSlide((SlideViewInterface) mView, slide);
     48         }
     49     }
     50 
     51     private void presentFirstSlide(SlideViewInterface view, SlideModel slide) {
     52         view.reset();
     53 
     54         if (slide.hasImage()) {
     55             presentImageThumbnail(view, slide.getImage());
     56         } else if (slide.hasVideo()) {
     57             presentVideoThumbnail(view, slide.getVideo());
     58         } else if (slide.hasAudio()) {
     59             presentAudioThumbnail(view, slide.getAudio());
     60         }
     61     }
     62 
     63     private ItemLoadedCallback<ImageLoaded> mImageLoadedCallback =
     64             new ItemLoadedCallback<ImageLoaded>() {
     65         public void onItemLoaded(ImageLoaded imageLoaded, Throwable exception) {
     66             if (exception == null) {
     67                 if (mItemLoadedFuture != null) {
     68                     synchronized(mItemLoadedFuture) {
     69                         mItemLoadedFuture.setIsDone(true);
     70                     }
     71                 }
     72                 if (mOnLoadedCallback != null) {
     73                     mOnLoadedCallback.onItemLoaded(imageLoaded, exception);
     74                 } else {
     75                     // Right now we're only handling image and video loaded callbacks.
     76                     SlideModel slide = ((SlideshowModel) mModel).get(0);
     77                     if (slide != null) {
     78                         if (slide.hasVideo() && imageLoaded.mIsVideo) {
     79                             ((SlideViewInterface)mView).setVideoThumbnail(null,
     80                                     imageLoaded.mBitmap);
     81                         } else if (slide.hasImage() && !imageLoaded.mIsVideo) {
     82                             ((SlideViewInterface)mView).setImage(null, imageLoaded.mBitmap);
     83                         }
     84                     }
     85                 }
     86             }
     87         }
     88     };
     89 
     90     private void presentVideoThumbnail(SlideViewInterface view, VideoModel video) {
     91         mItemLoadedFuture = video.loadThumbnailBitmap(mImageLoadedCallback);
     92     }
     93 
     94     private void presentImageThumbnail(SlideViewInterface view, ImageModel image) {
     95         mItemLoadedFuture = image.loadThumbnailBitmap(mImageLoadedCallback);
     96     }
     97 
     98     protected void presentAudioThumbnail(SlideViewInterface view, AudioModel audio) {
     99         view.setAudio(audio.getUri(), audio.getSrc(), audio.getExtras());
    100     }
    101 
    102     public void onModelChanged(Model model, boolean dataChanged) {
    103         // TODO Auto-generated method stub
    104     }
    105 
    106     public void cancelBackgroundLoading() {
    107         // Currently we only support background loading of thumbnails. If we extend background
    108         // loading to other media types, we should add a cancelLoading API to Model.
    109         SlideModel slide = ((SlideshowModel) mModel).get(0);
    110         if (slide != null && slide.hasImage()) {
    111             slide.getImage().cancelThumbnailLoading();
    112         }
    113     }
    114 
    115 }
    116