1 /*
2  * Copyright (C) 2010 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.camera.ui;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.util.Log;
22 import android.view.View;
23 import android.widget.ListView;
24 import android.widget.AdapterView;
25 import android.widget.ImageView;
26 import android.widget.SimpleAdapter;
27 
28 import com.android.camera.IconListPreference;
29 import com.android.camera.ListPreference;
30 import com.android.camera.R;
31 
32 import java.util.ArrayList;
33 import java.util.HashMap;
34 import java.util.List;
35 import java.util.Map;
36 
37 // A popup window that shows one camera setting. The title is the name of the
38 // setting (ex: white-balance). The entries are the supported values (ex:
39 // daylight, incandescent, etc). If initialized with an IconListPreference,
40 // the entries will contain both text and icons. Otherwise, entries will be
41 // shown in text.
42 public class ListPrefSettingPopup extends AbstractSettingPopup implements
43         AdapterView.OnItemClickListener {
44     private static final String TAG = "ListPrefSettingPopup";
45     private ListPreference mPreference;
46     private Listener mListener;
47 
48     static public interface Listener {
onListPrefChanged(ListPreference pref)49         public void onListPrefChanged(ListPreference pref);
50     }
51 
ListPrefSettingPopup(Context context, AttributeSet attrs)52     public ListPrefSettingPopup(Context context, AttributeSet attrs) {
53         super(context, attrs);
54     }
55 
56     private class ListPrefSettingAdapter extends SimpleAdapter {
ListPrefSettingAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to)57         ListPrefSettingAdapter(Context context, List<? extends Map<String, ?>> data,
58                 int resource, String[] from, int[] to) {
59             super(context, data, resource, from, to);
60         }
61 
62         @Override
setViewImage(ImageView v, String value)63         public void setViewImage(ImageView v, String value) {
64             if ("".equals(value)) {
65                 // Some settings have no icons. Ex: exposure compensation.
66                 v.setVisibility(View.GONE);
67             } else {
68                 super.setViewImage(v, value);
69             }
70         }
71     }
72 
initialize(ListPreference preference)73     public void initialize(ListPreference preference) {
74         mPreference = preference;
75         Context context = getContext();
76         CharSequence[] entries = mPreference.getEntries();
77         int[] iconIds = null;
78         if (preference instanceof IconListPreference) {
79             iconIds = ((IconListPreference) mPreference).getImageIds();
80             if (iconIds == null) {
81                 iconIds = ((IconListPreference) mPreference).getLargeIconIds();
82             }
83         }
84         // Set title.
85         mTitle.setText(mPreference.getTitle());
86 
87         // Prepare the ListView.
88         ArrayList<HashMap<String, Object>> listItem =
89                 new ArrayList<HashMap<String, Object>>();
90         for(int i = 0; i < entries.length; ++i) {
91             HashMap<String, Object> map = new HashMap<String, Object>();
92             map.put("text", entries[i].toString());
93             if (iconIds != null) map.put("image", iconIds[i]);
94             listItem.add(map);
95         }
96         SimpleAdapter listItemAdapter = new ListPrefSettingAdapter(context, listItem,
97                 R.layout.setting_item,
98                 new String[] {"text", "image"},
99                 new int[] {R.id.text, R.id.image});
100         ((ListView) mSettingList).setAdapter(listItemAdapter);
101         ((ListView) mSettingList).setOnItemClickListener(this);
102         reloadPreference();
103     }
104 
105     // The value of the preference may have changed. Update the UI.
106     @Override
reloadPreference()107     public void reloadPreference() {
108         int index = mPreference.findIndexOfValue(mPreference.getValue());
109         if (index != -1) {
110             ((ListView) mSettingList).setItemChecked(index, true);
111         } else {
112             Log.e(TAG, "Invalid preference value.");
113             mPreference.print();
114         }
115     }
116 
setSettingChangedListener(Listener listener)117     public void setSettingChangedListener(Listener listener) {
118         mListener = listener;
119     }
120 
121     @Override
onItemClick(AdapterView<?> parent, View view, int index, long id)122     public void onItemClick(AdapterView<?> parent, View view,
123             int index, long id) {
124         mPreference.setValueIndex(index);
125         if (mListener != null) mListener.onListPrefChanged(mPreference);
126     }
127 }
128