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      1 /*
      2  * Copyright (C) 2013 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.settings.accessibility;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.graphics.Color;
     22 import android.util.AttributeSet;
     23 import android.view.View;
     24 import android.view.accessibility.CaptioningManager.CaptionStyle;
     25 import android.widget.TextView;
     26 
     27 import com.android.internal.widget.SubtitleView;
     28 import com.android.settings.R;
     29 
     30 /**
     31  * Grid preference that allows the user to pick a captioning edge type.
     32  */
     33 public class EdgeTypePreference extends ListDialogPreference {
     34     private static final int DEFAULT_FOREGROUND_COLOR = Color.WHITE;
     35     private static final int DEFAULT_BACKGROUND_COLOR = Color.TRANSPARENT;
     36     private static final int DEFAULT_EDGE_COLOR = Color.BLACK;
     37     private static final float DEFAULT_FONT_SIZE = 32f;
     38 
     39     public EdgeTypePreference(Context context, AttributeSet attrs) {
     40         super(context, attrs);
     41 
     42         final Resources res = context.getResources();
     43         setValues(res.getIntArray(R.array.captioning_edge_type_selector_values));
     44         setTitles(res.getStringArray(R.array.captioning_edge_type_selector_titles));
     45         setDialogLayoutResource(R.layout.grid_picker_dialog);
     46         setListItemLayoutResource(R.layout.preset_picker_item);
     47     }
     48 
     49     @Override
     50     public boolean shouldDisableDependents() {
     51         return getValue() == CaptionStyle.EDGE_TYPE_NONE || super.shouldDisableDependents();
     52     }
     53 
     54     @Override
     55     protected void onBindListItem(View view, int index) {
     56         final SubtitleView preview = (SubtitleView) view.findViewById(R.id.preview);
     57 
     58         preview.setForegroundColor(DEFAULT_FOREGROUND_COLOR);
     59         preview.setBackgroundColor(DEFAULT_BACKGROUND_COLOR);
     60 
     61         final float density = getContext().getResources().getDisplayMetrics().density;
     62         preview.setTextSize(DEFAULT_FONT_SIZE * density);
     63 
     64         final int value = getValueAt(index);
     65         preview.setEdgeType(value);
     66         preview.setEdgeColor(DEFAULT_EDGE_COLOR);
     67 
     68         final CharSequence title = getTitleAt(index);
     69         if (title != null) {
     70             final TextView summary = (TextView) view.findViewById(R.id.summary);
     71             summary.setText(title);
     72         }
     73     }
     74 }
     75