IconListPreference.java revision f5bffc476b8293b30bb500bed2ab7914bb4ca411 
1/*
2 * Copyright (C) 2009 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;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.content.res.TypedArray;
22import android.util.AttributeSet;
23
24import com.android.camera.R;
25
26import java.util.List;
27
28/** A {@code ListPreference} where each entry has a corresponding icon. */
29public class IconListPreference extends ListPreference {
30
31    private int mIconIds[];
32    private int mLargeIconIds[];
33    private int mImageIds[];
34
35    public IconListPreference(Context context, AttributeSet attrs) {
36        super(context, attrs);
37        TypedArray a = context.obtainStyledAttributes(
38                attrs, R.styleable.IconListPreference, 0, 0);
39        Resources res = context.getResources();
40        mIconIds = getIds(res, a.getResourceId(
41                R.styleable.IconListPreference_icons, 0));
42        mLargeIconIds = getIds(res, a.getResourceId(
43                R.styleable.IconListPreference_largeIcons, 0));
44        mImageIds = getIds(res, a.getResourceId(
45                R.styleable.IconListPreference_images, 0));
46        if (mImageIds == null) mImageIds = mLargeIconIds;
47        a.recycle();
48    }
49
50    public int[] getIconIds() {
51        return mIconIds;
52    }
53
54    public int[] getLargeIconIds() {
55        return mLargeIconIds;
56    }
57
58    public int[] getImageIds() {
59        return mImageIds;
60    }
61
62    public void setIconIds(int[] iconIds) {
63        mIconIds = iconIds;
64    }
65
66    public void setLargeIconIds(int[] largeIconIds) {
67        mLargeIconIds = largeIconIds;
68    }
69
70    private int[] getIds(Resources res, int iconsRes) {
71        if (iconsRes == 0) return null;
72        TypedArray array = res.obtainTypedArray(iconsRes);
73        int n = array.length();
74        int ids[] = new int[n];
75        for (int i = 0; i < n; ++i) {
76            ids[i] = array.getResourceId(i, 0);
77        }
78        array.recycle();
79        return ids;
80    }
81
82    @Override
83    public void filterUnsupported(List<String> supported) {
84        CharSequence entryValues[] = getEntryValues();
85        IntArray iconIds = new IntArray();
86        IntArray largeIconIds = new IntArray();
87        IntArray imageIds = new IntArray();
88
89        // We allow mIconsIds to be null, but not mLargeIconIds. The reason is that if large icons
90        // are unspecified, the on screen icons will be blank which is a bug.
91        for (int i = 0, len = entryValues.length; i < len; i++) {
92            if (supported.indexOf(entryValues[i].toString()) >= 0) {
93                if (mIconIds != null) iconIds.add(mIconIds[i]);
94                largeIconIds.add(mLargeIconIds[i]);
95                if (mImageIds != null) imageIds.add(mImageIds[i]);
96            }
97        }
98        if (mIconIds != null) mIconIds = iconIds.toArray(new int[iconIds.size()]);
99        mLargeIconIds = largeIconIds.toArray(new int[largeIconIds.size()]);
100        if (mImageIds != null) mImageIds = imageIds.toArray(new int[imageIds.size()]);
101        super.filterUnsupported(supported);
102    }
103}
104