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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.res.Resources;
     20 import android.support.v7.widget.RecyclerView;
     21 import android.text.format.DateFormat;
     22 import android.view.LayoutInflater;
     23 import android.view.View;
     24 import android.view.ViewGroup;
     25 import android.widget.TextView;
     26 
     27 import com.android.tv.R;
     28 
     29 import java.util.Date;
     30 import java.util.concurrent.TimeUnit;
     31 
     32 /**
     33  * Adapts the time range from {@link ProgramManager} to the timeline header row of the program
     34  * guide table.
     35  */
     36 public class TimeListAdapter extends RecyclerView.Adapter<TimeListAdapter.TimeViewHolder> {
     37     private static final long TIME_UNIT_MS = TimeUnit.MINUTES.toMillis(30);
     38     private static int sRowHeaderOverlapping;
     39 
     40     // Nearest half hour at or before the start time.
     41     private long mStartUtcMs;
     42 
     43     public TimeListAdapter(Resources res) {
     44         if (sRowHeaderOverlapping == 0) {
     45             sRowHeaderOverlapping = Math.abs(res.getDimensionPixelOffset(
     46                     R.dimen.program_guide_table_header_row_overlap));
     47         }
     48     }
     49 
     50     public void update(long startTimeMs) {
     51         mStartUtcMs = startTimeMs;
     52         notifyDataSetChanged();
     53     }
     54 
     55     @Override
     56     public int getItemCount() {
     57         return Integer.MAX_VALUE;
     58     }
     59 
     60     @Override
     61     public int getItemViewType(int position) {
     62         return R.layout.program_guide_table_header_row_item;
     63     }
     64 
     65     @Override
     66     public void onBindViewHolder(TimeViewHolder holder, int position) {
     67         long startTime = mStartUtcMs + position * TIME_UNIT_MS;
     68         long endTime = startTime + TIME_UNIT_MS;
     69 
     70         View itemView = holder.itemView;
     71 
     72         TextView textView = (TextView) itemView.findViewById(R.id.time);
     73         String time = DateFormat.getTimeFormat(itemView.getContext()).format(new Date(startTime));
     74         textView.setText(time);
     75 
     76         RecyclerView.LayoutParams lp = (RecyclerView.LayoutParams) itemView.getLayoutParams();
     77         lp.width = GuideUtils.convertMillisToPixel(startTime, endTime);
     78         if (position == 0) {
     79             // Adjust width for the first entry to make the item starts from the fading edge.
     80             lp.setMarginStart(sRowHeaderOverlapping - lp.width / 2);
     81         } else {
     82             lp.setMarginStart(0);
     83         }
     84         itemView.setLayoutParams(lp);
     85     }
     86 
     87     @Override
     88     public TimeViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
     89         View itemView = LayoutInflater.from(parent.getContext()).inflate(viewType, parent, false);
     90         return new TimeViewHolder(itemView);
     91     }
     92 
     93     public static class TimeViewHolder extends RecyclerView.ViewHolder {
     94         public TimeViewHolder(View itemView) {
     95             super(itemView);
     96         }
     97     }
     98 }
     99