1/*
2 * Copyright (C) 2015 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.messaging.ui.mediapicker;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.widget.GridView;
22
23public class MediaPickerGridView extends GridView {
24
25    public MediaPickerGridView(final Context context, final AttributeSet attrs) {
26        super(context, attrs);
27    }
28
29    /**
30     * Returns if the grid view can be swiped down further. It cannot be swiped down
31     * if there's no item or if we are already at the top.
32     */
33    public boolean canSwipeDown() {
34        if (getAdapter() == null || getAdapter().getCount() == 0 || getChildCount() == 0) {
35            return false;
36        }
37
38        final int firstVisiblePosition = getFirstVisiblePosition();
39        if (firstVisiblePosition == 0 && getChildAt(0).getTop() >= 0) {
40            return false;
41        }
42        return true;
43    }
44}
45