1/*
2 * Copyright (C) 2007 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 android.widget.gridview;
18
19import android.view.KeyEvent;
20import android.view.View;
21import android.view.ViewGroup;
22import android.widget.BaseAdapter;
23import android.widget.GridView;
24import android.widget.ListAdapter;
25
26import android.util.GridScenario;
27
28import java.util.ArrayList;
29
30/**
31 * A grid with vertical spacing between rows
32 */
33public class GridDelete extends GridScenario {
34    @Override
35    protected void init(Params params) {
36        params.setStartingSelectionPosition(-1)
37                .setMustFillScreen(false)
38                .setNumItems(1001)
39                .setNumColumns(4)
40                .setItemScreenSizeFactor(0.20)
41                .setVerticalSpacing(20);
42    }
43
44
45
46    @Override
47    protected ListAdapter createAdapter() {
48        return new DeleteAdapter(getInitialNumItems());
49    }
50
51
52
53
54    @Override
55    public boolean onKeyDown(int keyCode, KeyEvent event) {
56        if (keyCode == KeyEvent.KEYCODE_DEL) {
57            GridView g = getGridView();
58            ((DeleteAdapter)g.getAdapter()).deletePosition(g.getSelectedItemPosition());
59            return true;
60        } else {
61            return super.onKeyDown(keyCode, event);
62        }
63    }
64
65
66
67
68    private class DeleteAdapter extends BaseAdapter {
69
70        private ArrayList<Integer> mData;
71
72        public DeleteAdapter(int initialNumItems) {
73            super();
74            mData = new ArrayList<Integer>(initialNumItems);
75
76            int i;
77            for (i=0; i<initialNumItems; ++i) {
78                mData.add(new Integer(10000 + i));
79            }
80
81        }
82
83        public void deletePosition(int selectedItemPosition) {
84            if (selectedItemPosition >=0 && selectedItemPosition < mData.size()) {
85                mData.remove(selectedItemPosition);
86                notifyDataSetChanged();
87            }
88
89        }
90
91        public int getCount() {
92            return mData.size();
93        }
94
95        public Object getItem(int position) {
96            return mData.get(position);
97        }
98
99        public long getItemId(int position) {
100            return mData.get(position);
101        }
102
103        public View getView(int position, View convertView, ViewGroup parent) {
104            int desiredHeight = getDesiredItemHeight();
105            return createView(mData.get(position), parent, desiredHeight);
106        }
107    }
108}
109