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      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 android.support.v17.leanback.widget;
     18 
     19 import android.content.Context;
     20 import android.graphics.Rect;
     21 import android.util.AttributeSet;
     22 import android.view.KeyEvent;
     23 import android.view.View;
     24 import android.widget.LinearLayout;
     25 
     26 /**
     27  * A LinearLayout that preserves the focused child view.
     28  * @hide
     29  */
     30 class PlaybackControlsRowView extends LinearLayout {
     31     public interface OnUnhandledKeyListener {
     32         /**
     33          * Returns true if the key event should be consumed.
     34          */
     35         public boolean onUnhandledKey(KeyEvent event);
     36     }
     37 
     38     private OnUnhandledKeyListener mOnUnhandledKeyListener;
     39 
     40     public PlaybackControlsRowView(Context context, AttributeSet attrs) {
     41         super(context, attrs);
     42     }
     43 
     44     public PlaybackControlsRowView(Context context, AttributeSet attrs, int defStyle) {
     45         super(context, attrs, defStyle);
     46     }
     47 
     48     public void setOnUnhandledKeyListener(OnUnhandledKeyListener listener) {
     49          mOnUnhandledKeyListener = listener;
     50     }
     51 
     52     public OnUnhandledKeyListener getOnUnhandledKeyListener() {
     53         return mOnUnhandledKeyListener;
     54     }
     55 
     56     @Override
     57     public boolean dispatchKeyEvent(KeyEvent event) {
     58         if (super.dispatchKeyEvent(event)) {
     59             return true;
     60         }
     61         if (mOnUnhandledKeyListener != null && mOnUnhandledKeyListener.onUnhandledKey(event)) {
     62             return true;
     63         }
     64         return false;
     65     }
     66 
     67     @Override
     68     protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
     69         final View focused = findFocus();
     70         if (focused != null && focused.requestFocus(direction, previouslyFocusedRect)) {
     71             return true;
     72         }
     73         return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
     74     }
     75 }
     76