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 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
