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
17package com.android.camera.ui;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.util.Log;
22import android.view.View;
23import android.widget.ListView;
24import android.widget.AdapterView;
25import android.widget.ImageView;
26import android.widget.SimpleAdapter;
27
28import com.android.camera.IconListPreference;
29import com.android.camera.ListPreference;
30import com.android.camera.R;
31
32import java.util.ArrayList;
33import java.util.HashMap;
34import java.util.List;
35import 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.
42public 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 {
49        public void onListPrefChanged(ListPreference pref);
50    }
51
52    public ListPrefSettingPopup(Context context, AttributeSet attrs) {
53        super(context, attrs);
54    }
55
56    private class ListPrefSettingAdapter extends SimpleAdapter {
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
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
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
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
117    public void setSettingChangedListener(Listener listener) {
118        mListener = listener;
119    }
120
121    @Override
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