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      1 /*
      2  * Copyright (C) 2017 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 androidx.leanback.widget;
     18 
     19 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
     20 
     21 import android.content.Context;
     22 import android.graphics.Rect;
     23 import android.util.AttributeSet;
     24 import android.view.FocusFinder;
     25 import android.view.KeyEvent;
     26 import android.view.View;
     27 import android.view.ViewGroup;
     28 import android.widget.LinearLayout;
     29 
     30 import androidx.annotation.RestrictTo;
     31 import androidx.leanback.R;
     32 
     33 /**
     34  * View for PlaybackTransportRowPresenter that has a custom focusSearch.
     35  * @hide
     36  */
     37 @RestrictTo(LIBRARY_GROUP)
     38 public class PlaybackTransportRowView extends LinearLayout {
     39 
     40     /**
     41      * @hide
     42      */
     43     @RestrictTo(LIBRARY_GROUP)
     44     public interface OnUnhandledKeyListener {
     45         /**
     46          * Returns true if the key event should be consumed.
     47          */
     48         boolean onUnhandledKey(KeyEvent event);
     49     }
     50 
     51     private OnUnhandledKeyListener mOnUnhandledKeyListener;
     52 
     53     public PlaybackTransportRowView(Context context, AttributeSet attrs) {
     54         super(context, attrs);
     55     }
     56 
     57     public PlaybackTransportRowView(Context context, AttributeSet attrs, int defStyle) {
     58         super(context, attrs, defStyle);
     59     }
     60 
     61     void setOnUnhandledKeyListener(OnUnhandledKeyListener listener) {
     62         mOnUnhandledKeyListener = listener;
     63     }
     64 
     65     OnUnhandledKeyListener getOnUnhandledKeyListener() {
     66         return mOnUnhandledKeyListener;
     67     }
     68 
     69     @Override
     70     public boolean dispatchKeyEvent(KeyEvent event) {
     71         if (super.dispatchKeyEvent(event)) {
     72             return true;
     73         }
     74         return mOnUnhandledKeyListener != null && mOnUnhandledKeyListener.onUnhandledKey(event);
     75     }
     76 
     77     @Override
     78     protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
     79         final View focused = findFocus();
     80         if (focused != null && focused.requestFocus(direction, previouslyFocusedRect)) {
     81             return true;
     82         }
     83         View progress = findViewById(R.id.playback_progress);
     84         if (progress != null && progress.isFocusable()) {
     85             if (progress.requestFocus(direction, previouslyFocusedRect)) {
     86                 return true;
     87             }
     88         }
     89         return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
     90     }
     91 
     92     @Override
     93     public View focusSearch(View focused, int direction) {
     94         // when focusSearch vertically, return the next immediate focusable child
     95         if (focused != null) {
     96             if (direction == View.FOCUS_UP) {
     97                 int index = indexOfChild(getFocusedChild());
     98                 for (index = index - 1; index >= 0; index--) {
     99                     View view = getChildAt(index);
    100                     if (view.hasFocusable()) {
    101                         return view;
    102                     }
    103                 }
    104             } else if (direction == View.FOCUS_DOWN) {
    105                 int index = indexOfChild(getFocusedChild());
    106                 for (index = index + 1; index < getChildCount(); index++) {
    107                     View view = getChildAt(index);
    108                     if (view.hasFocusable()) {
    109                         return view;
    110                     }
    111                 }
    112             } else if (direction == View.FOCUS_LEFT || direction == View.FOCUS_RIGHT) {
    113                 if (getFocusedChild() instanceof ViewGroup) {
    114                     return FocusFinder.getInstance().findNextFocus(
    115                             (ViewGroup) getFocusedChild(), focused, direction);
    116                 }
    117             }
    118         }
    119         return super.focusSearch(focused, direction);
    120     }
    121 
    122     @Override
    123     public boolean hasOverlappingRendering() {
    124         return false;
    125     }
    126 }
    127