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 
17 package com.android.messaging.ui.mediapicker;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.widget.GridView;
22 
23 public class MediaPickerGridView extends GridView {
24 
MediaPickerGridView(final Context context, final AttributeSet attrs)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      */
canSwipeDown()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