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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.menu;
     18 
     19 import android.content.Context;
     20 import android.view.View;
     21 
     22 import com.android.tv.R;
     23 import com.android.tv.TvApplication;
     24 import com.android.tv.TvOptionsManager;
     25 import com.android.tv.TvOptionsManager.OptionChangedListener;
     26 import com.android.tv.analytics.Tracker;
     27 
     28 import java.util.List;
     29 
     30 /*
     31  * An adapter of options.
     32  */
     33 public abstract class OptionsRowAdapter extends ItemListRowView.ItemListAdapter<MenuAction> {
     34     private static final String CUSTOM_ACTION_LABEL = "custom action";
     35     protected final Tracker mTracker;
     36     private List<MenuAction> mActionList;
     37 
     38     private final View.OnClickListener mMenuActionOnClickListener = new View.OnClickListener() {
     39         @Override
     40         public void onClick(View view) {
     41             final MenuAction action = (MenuAction) view.getTag();
     42             view.post(new Runnable() {
     43                 @Override
     44                 public void run() {
     45                     int resId = action.getActionNameResId();
     46                     if (resId == 0) {
     47                         mTracker.sendMenuClicked(CUSTOM_ACTION_LABEL);
     48                     } else {
     49                         mTracker.sendMenuClicked(resId);
     50                     }
     51                     executeAction(action.getType());
     52                 }
     53             });
     54         }
     55     };
     56 
     57     public OptionsRowAdapter(Context context) {
     58         super(context);
     59         mTracker = TvApplication.getSingletons(context).getTracker();
     60     }
     61 
     62     /**
     63      * Update action list and its content.
     64      */
     65     @Override
     66     public void update() {
     67         if (mActionList == null) {
     68             mActionList = createActions();
     69             updateActions();
     70             setItemList(mActionList);
     71         } else {
     72             if (updateActions()) {
     73                 setItemList(mActionList);
     74             }
     75         }
     76     }
     77 
     78     @Override
     79     protected int getLayoutResId(int viewType) {
     80         return R.layout.menu_card_action;
     81     }
     82 
     83     protected abstract List<MenuAction> createActions();
     84     protected abstract boolean updateActions();
     85     protected abstract void executeAction(int type);
     86 
     87     /**
     88      * Gets the action at the given position.
     89      * Note that action at the position may differ from returned by {@link #createActions}.
     90      * See {@link CustomizableOptionsRowAdapter}
     91      */
     92     protected MenuAction getAction(int position) {
     93         return mActionList.get(position);
     94     }
     95 
     96     /**
     97      * Sets the action at the given position.
     98      * Note that action at the position may differ from returned by {@link #createActions}.
     99      * See {@link CustomizableOptionsRowAdapter}
    100      */
    101     protected void setAction(int position, MenuAction action) {
    102         mActionList.set(position, action);
    103     }
    104 
    105     /**
    106      * Adds an action to the given position.
    107      * Note that action at the position may differ from returned by {@link #createActions}.
    108      * See {@link CustomizableOptionsRowAdapter}
    109      */
    110     protected void addAction(int position, MenuAction action) {
    111         mActionList.add(position, action);
    112     }
    113 
    114     /**
    115      * Removes an action at the given position.
    116      * Note that action at the position may differ from returned by {@link #createActions}.
    117      * See {@link CustomizableOptionsRowAdapter}
    118      */
    119     protected void removeAction(int position) {
    120         mActionList.remove(position);
    121     }
    122 
    123     protected int getActionSize() {
    124         return mActionList.size();
    125     }
    126 
    127     @Override
    128     public void onBindViewHolder(MyViewHolder viewHolder, int position) {
    129         super.onBindViewHolder(viewHolder, position);
    130 
    131         viewHolder.itemView.setTag(getItemList().get(position));
    132         viewHolder.itemView.setOnClickListener(mMenuActionOnClickListener);
    133     }
    134 
    135     @Override
    136     public int getItemViewType(int position) {
    137         // This makes 1:1 mapping from MenuAction to ActionCardView. That is, an ActionCardView will
    138         // not be used(recycled) by other type of MenuAction. So the selection state of the view can
    139         // be preserved.
    140         return mActionList.get(position).getType();
    141     }
    142 
    143     protected void setOptionChangedListener(final MenuAction action) {
    144         TvOptionsManager om = getMainActivity().getTvOptionsManager();
    145         om.setOptionChangedListener(action.getType(), new OptionChangedListener() {
    146             @Override
    147             public void onOptionChanged(String newOption) {
    148                 setItemList(mActionList);
    149             }
    150         });
    151     }
    152 }
    153