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 
EdgeTypePreference(Context context, AttributeSet attrs)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
shouldDisableDependents()50     public boolean shouldDisableDependents() {
51         return getValue() == CaptionStyle.EDGE_TYPE_NONE || super.shouldDisableDependents();
52     }
53 
54     @Override
onBindListItem(View view, int index)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