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      1 /*
      2  * Copyright (C) 2014 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.tv.settings;
     18 
     19 import android.animation.ObjectAnimator;
     20 import android.app.Activity;
     21 import android.content.Context;
     22 import android.content.res.Resources;
     23 import android.graphics.Bitmap;
     24 import android.graphics.Paint;
     25 import android.graphics.Paint.FontMetricsInt;
     26 import android.graphics.Typeface;
     27 import android.net.Uri;
     28 import android.support.v17.leanback.widget.Presenter;
     29 import android.text.TextUtils;
     30 import android.view.LayoutInflater;
     31 import android.view.View;
     32 import android.view.ViewGroup;
     33 import android.view.ViewGroup.LayoutParams;
     34 import android.widget.ImageView;
     35 import android.widget.TextView;
     36 
     37 import com.android.tv.settings.widget.BitmapDownloader;
     38 import com.android.tv.settings.widget.BitmapDownloader.BitmapCallback;
     39 import com.android.tv.settings.widget.BitmapWorkerOptions;
     40 
     41 public class MenuItemPresenter extends Presenter {
     42 
     43     private static class MenuItemViewHolder extends ViewHolder {
     44         public final ImageView mIconView;
     45         public final TextView mTitleView;
     46         public final TextView mDescriptionView;
     47         public BitmapCallback mBitmapCallBack;
     48 
     49         MenuItemViewHolder(View v) {
     50             super(v);
     51             mIconView = (ImageView) v.findViewById(R.id.icon);
     52             mTitleView = (TextView) v.findViewById(R.id.title);
     53             mDescriptionView = (TextView) v.findViewById(R.id.description);
     54         }
     55 
     56     }
     57 
     58     @Override
     59     public ViewHolder onCreateViewHolder(ViewGroup parent) {
     60         LayoutInflater inflater = (LayoutInflater) parent.getContext().getSystemService(
     61                 Context.LAYOUT_INFLATER_SERVICE);
     62         View v = inflater.inflate(R.layout.browse_item, parent, false);
     63         return new MenuItemViewHolder(v);
     64     }
     65 
     66     @Override
     67     public void onBindViewHolder(ViewHolder viewHolder, Object item) {
     68         if (item instanceof MenuItem && viewHolder instanceof MenuItemViewHolder) {
     69             final MenuItem menuItem = (MenuItem) item;
     70             MenuItemViewHolder menuItemViewHolder = (MenuItemViewHolder) viewHolder;
     71 
     72             prepareTextView(menuItemViewHolder.mTitleView, menuItem.getTitle());
     73             boolean hasDescription = prepareTextView(menuItemViewHolder.mDescriptionView,
     74                     menuItem.getDescriptionGetter() == null ? null
     75                     : menuItem.getDescriptionGetter().getText());
     76 
     77             Resources res = menuItemViewHolder.mTitleView.getContext().getResources();
     78             ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams)
     79                     menuItemViewHolder.mTitleView.getLayoutParams();
     80             if (hasDescription) {
     81                 lp.bottomMargin = (int) res.getDimension(R.dimen.browse_item_title_marginBottom);
     82                 menuItemViewHolder.mTitleView.setSingleLine(true);
     83                 menuItemViewHolder.mTitleView.setLines(1);
     84             } else {
     85                 lp.bottomMargin = (int) res.getDimension(R.dimen.browse_item_description_marginBottom);
     86                 menuItemViewHolder.mTitleView.setSingleLine(false);
     87                 menuItemViewHolder.mTitleView.setLines(2);
     88             }
     89             menuItemViewHolder.mTitleView.setLayoutParams(lp);
     90 
     91             viewHolder.view.setOnClickListener(new View.OnClickListener() {
     92                 @Override
     93                 public void onClick(View v) {
     94                     if (v != null && menuItem.getIntent() != null) {
     95                         ((Activity) v.getContext()).startActivity(menuItem.getIntent());
     96                     }
     97                 }
     98             });
     99 
    100             prepareImageView(menuItemViewHolder, menuItem.getImageUriGetter().getUri());
    101         }
    102     }
    103 
    104     @Override
    105     public void onUnbindViewHolder(ViewHolder viewHolder) {
    106         if (viewHolder instanceof MenuItemViewHolder) {
    107             MenuItemViewHolder menuItemViewHolder = (MenuItemViewHolder) viewHolder;
    108             menuItemViewHolder.mIconView.setImageBitmap(null);
    109             BitmapDownloader.getInstance(viewHolder.view.getContext()).cancelDownload(
    110                     menuItemViewHolder.mBitmapCallBack);
    111         }
    112     }
    113 
    114     private void prepareImageView(final MenuItemViewHolder menuItemViewHolder, String imageUri) {
    115         menuItemViewHolder.mIconView.setVisibility(View.INVISIBLE);
    116         LayoutParams lp = menuItemViewHolder.mIconView.getLayoutParams();
    117         if (imageUri != null) {
    118             menuItemViewHolder.mBitmapCallBack = new BitmapCallback() {
    119                 @Override
    120                 public void onBitmapRetrieved(Bitmap bitmap) {
    121                     if (bitmap != null) {
    122                         menuItemViewHolder.mIconView.setImageBitmap(bitmap);
    123                         menuItemViewHolder.mIconView.setVisibility(View.VISIBLE);
    124                         menuItemViewHolder.mIconView.setAlpha(0f);
    125                         fadeIn(menuItemViewHolder.mIconView);
    126                     }
    127                 }
    128             };
    129 
    130             Context context = menuItemViewHolder.view.getContext();
    131 
    132             BitmapWorkerOptions bitmapWorkerOptions = new BitmapWorkerOptions.Builder(context)
    133                     .resource(Uri.parse(imageUri)).height(lp.height).width(lp.width).build();
    134 
    135             BitmapDownloader.getInstance(context).getBitmap(bitmapWorkerOptions,
    136                     menuItemViewHolder.mBitmapCallBack);
    137         }
    138     }
    139 
    140     private void fadeIn(View v) {
    141         ObjectAnimator alphaAnimator = ObjectAnimator.ofFloat(v, "alpha", 1f);
    142         alphaAnimator.setDuration(v.getContext().getResources().getInteger(
    143                 android.R.integer.config_shortAnimTime));
    144         alphaAnimator.start();
    145     }
    146 
    147     private boolean prepareTextView(TextView textView, String title) {
    148         boolean hasTextView = !TextUtils.isEmpty(title);
    149         if (hasTextView) {
    150             textView.setText(title);
    151             textView.setVisibility(View.VISIBLE);
    152         } else {
    153             textView.setVisibility(View.GONE);
    154         }
    155         return hasTextView;
    156     }
    157 }
    158