1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14package android.support.v17.leanback.widget; 15 16import android.content.Context; 17import android.graphics.Rect; 18import android.util.AttributeSet; 19import android.view.View; 20import android.widget.FrameLayout; 21 22/** 23 * Top level implementation viewgroup for browse to manage transitions between 24 * browse sub fragments. 25 * @hide 26 */ 27public class BrowseFrameLayout extends FrameLayout { 28 29 public interface OnFocusSearchListener { 30 public View onFocusSearch(View focused, int direction); 31 } 32 33 public interface OnChildFocusListener { 34 public boolean onRequestFocusInDescendants(int direction, 35 Rect previouslyFocusedRect); 36 public void onRequestChildFocus(View child, View focused); 37 } 38 39 public BrowseFrameLayout(Context context) { 40 this(context, null, 0); 41 } 42 43 public BrowseFrameLayout(Context context, AttributeSet attrs) { 44 this(context, attrs, 0); 45 } 46 47 public BrowseFrameLayout(Context context, AttributeSet attrs, int defStyle) { 48 super(context, attrs, defStyle); 49 } 50 51 private OnFocusSearchListener mListener; 52 private OnChildFocusListener mOnChildFocusListener; 53 54 public void setOnFocusSearchListener(OnFocusSearchListener listener) { 55 mListener = listener; 56 } 57 58 public void setOnChildFocusListener(OnChildFocusListener listener) { 59 mOnChildFocusListener = listener; 60 } 61 62 @Override 63 protected boolean onRequestFocusInDescendants(int direction, 64 Rect previouslyFocusedRect) { 65 if (mOnChildFocusListener != null) { 66 return mOnChildFocusListener.onRequestFocusInDescendants(direction, 67 previouslyFocusedRect); 68 } 69 return super.onRequestFocusInDescendants(direction, previouslyFocusedRect); 70 } 71 72 @Override 73 public View focusSearch(View focused, int direction) { 74 if (mListener != null) { 75 View view = mListener.onFocusSearch(focused, direction); 76 if (view != null) { 77 return view; 78 } 79 } 80 return super.focusSearch(focused, direction); 81 } 82 83 @Override 84 public void requestChildFocus(View child, View focused) { 85 super.requestChildFocus(child, focused); 86 if (mOnChildFocusListener != null) { 87 mOnChildFocusListener.onRequestChildFocus(child, focused); 88 } 89 } 90} 91