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      1 /*
      2  * Copyright (C) 2015 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.guide;
     18 
     19 import android.content.Context;
     20 import android.support.annotation.MainThread;
     21 import android.support.v7.widget.RecyclerView;
     22 import android.util.Log;
     23 import android.view.LayoutInflater;
     24 import android.view.View;
     25 import android.view.ViewGroup;
     26 import android.widget.TextView;
     27 import com.android.tv.R;
     28 import com.android.tv.data.GenreItems;
     29 import java.util.List;
     30 
     31 /** Adapts the genre items obtained from {@link GenreItems} to the program guide side panel. */
     32 class GenreListAdapter extends RecyclerView.Adapter<GenreListAdapter.GenreRowHolder> {
     33     private static final String TAG = "GenreListAdapter";
     34     private static final boolean DEBUG = false;
     35 
     36     private final Context mContext;
     37     private final ProgramManager mProgramManager;
     38     private final ProgramGuide mProgramGuide;
     39     private String[] mGenreLabels;
     40 
     41     GenreListAdapter(Context context, ProgramManager programManager, ProgramGuide guide) {
     42         mContext = context;
     43         mProgramManager = programManager;
     44         mProgramManager.addListener(
     45                 new ProgramManager.ListenerAdapter() {
     46                     @Override
     47                     public void onGenresUpdated() {
     48                         mGenreLabels = GenreItems.getLabels(mContext);
     49                         notifyDataSetChanged();
     50                     }
     51                 });
     52         mProgramGuide = guide;
     53     }
     54 
     55     @Override
     56     public int getItemCount() {
     57         List<Integer> filteredGenreIds = mProgramManager.getFilteredGenreIds();
     58         if (filteredGenreIds == null) {
     59             // Genre item would be available after program manager builds genre filter.
     60             return 0;
     61         }
     62         return filteredGenreIds.size();
     63     }
     64 
     65     @Override
     66     public int getItemViewType(int position) {
     67         return R.layout.program_guide_side_panel_row;
     68     }
     69 
     70     @Override
     71     public void onBindViewHolder(GenreRowHolder holder, int position) {
     72         List<Integer> filteredGenreIds = mProgramManager.getFilteredGenreIds();
     73         int genreId = filteredGenreIds.get(position);
     74         holder.onBind(genreId, mGenreLabels[genreId]);
     75     }
     76 
     77     @Override
     78     public GenreRowHolder onCreateViewHolder(ViewGroup parent, int viewType) {
     79         View itemView = LayoutInflater.from(parent.getContext()).inflate(viewType, parent, false);
     80         itemView.addOnAttachStateChangeListener(
     81                 new View.OnAttachStateChangeListener() {
     82                     @Override
     83                     public void onViewAttachedToWindow(View view) {
     84                         // Animation is not meaningful now, skip it.
     85                         view.getStateListAnimator().jumpToCurrentState();
     86                     }
     87 
     88                     @Override
     89                     public void onViewDetachedFromWindow(View view) {
     90                         // Do nothing
     91                     }
     92                 });
     93         return new GenreRowHolder(itemView, mProgramGuide);
     94     }
     95 
     96     static class GenreRowHolder extends RecyclerView.ViewHolder
     97             implements View.OnFocusChangeListener {
     98         private final ProgramGuide mProgramGuide;
     99         private int mGenreId;
    100 
    101         @MainThread
    102         GenreRowHolder(View itemView, ProgramGuide programGuide) {
    103             super(itemView);
    104             mProgramGuide = programGuide;
    105         }
    106 
    107         public void onBind(int genreId, String genreLabel) {
    108             mGenreId = genreId;
    109 
    110             TextView textView = (TextView) itemView;
    111             textView.setText(genreLabel);
    112 
    113             itemView.setOnFocusChangeListener(this);
    114         }
    115 
    116         @Override
    117         public void onFocusChange(View view, boolean hasFocus) {
    118             if (hasFocus) {
    119                 if (DEBUG) {
    120                     Log.d(
    121                             TAG,
    122                             "onFocusChanged "
    123                                     + ((TextView) view).getText()
    124                                     + "("
    125                                     + mGenreId
    126                                     + ") hasFocus");
    127                 }
    128                 mProgramGuide.requestGenreChange(mGenreId);
    129             }
    130         }
    131     }
    132 }
    133