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 */ 14 package android.support.v17.leanback.widget; 15 16 import android.support.v17.leanback.R; 17 import android.text.TextUtils; 18 import android.view.LayoutInflater; 19 import android.view.View; 20 import android.view.ViewGroup; 21 import android.view.accessibility.AccessibilityEvent; 22 import android.widget.ImageView; 23 import android.widget.TextView; 24 25 /** 26 * Displays primary and secondary controls for a {@link PlaybackControlsRow}. 27 * 28 * Binds to items of type {@link Action}. 29 */ 30 public class ControlButtonPresenterSelector extends PresenterSelector { 31 32 private final Presenter mPrimaryPresenter = 33 new ControlButtonPresenter(R.layout.lb_control_button_primary); 34 private final Presenter mSecondaryPresenter = 35 new ControlButtonPresenter(R.layout.lb_control_button_secondary); 36 private final Presenter[] mPresenters = new Presenter[]{mPrimaryPresenter}; 37 38 /** 39 * Returns the presenter for primary controls. 40 */ getPrimaryPresenter()41 public Presenter getPrimaryPresenter() { 42 return mPrimaryPresenter; 43 } 44 45 /** 46 * Returns the presenter for secondary controls. 47 */ getSecondaryPresenter()48 public Presenter getSecondaryPresenter() { 49 return mSecondaryPresenter; 50 } 51 52 /** 53 * Always returns the presenter for primary controls. 54 */ 55 @Override getPresenter(Object item)56 public Presenter getPresenter(Object item) { 57 return mPrimaryPresenter; 58 } 59 60 @Override getPresenters()61 public Presenter[] getPresenters() { 62 return mPresenters; 63 } 64 65 static class ActionViewHolder extends Presenter.ViewHolder { 66 ImageView mIcon; 67 TextView mLabel; 68 View mFocusableView; 69 ActionViewHolder(View view)70 public ActionViewHolder(View view) { 71 super(view); 72 mIcon = (ImageView) view.findViewById(R.id.icon); 73 mLabel = (TextView) view.findViewById(R.id.label); 74 mFocusableView = view.findViewById(R.id.button); 75 } 76 } 77 78 static class ControlButtonPresenter extends Presenter { 79 private int mLayoutResourceId; 80 ControlButtonPresenter(int layoutResourceId)81 ControlButtonPresenter(int layoutResourceId) { 82 mLayoutResourceId = layoutResourceId; 83 } 84 85 @Override onCreateViewHolder(ViewGroup parent)86 public ViewHolder onCreateViewHolder(ViewGroup parent) { 87 View v = LayoutInflater.from(parent.getContext()) 88 .inflate(mLayoutResourceId, parent, false); 89 return new ActionViewHolder(v); 90 } 91 92 @Override onBindViewHolder(Presenter.ViewHolder viewHolder, Object item)93 public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) { 94 Action action = (Action) item; 95 ActionViewHolder vh = (ActionViewHolder) viewHolder; 96 vh.mIcon.setImageDrawable(action.getIcon()); 97 if (vh.mLabel != null) { 98 if (action.getIcon() == null) { 99 vh.mLabel.setText(action.getLabel1()); 100 } else { 101 vh.mLabel.setText(null); 102 } 103 } 104 CharSequence contentDescription = TextUtils.isEmpty(action.getLabel2()) ? 105 action.getLabel1() : action.getLabel2(); 106 if (!TextUtils.equals(vh.mFocusableView.getContentDescription(), contentDescription)) { 107 vh.mFocusableView.setContentDescription(contentDescription); 108 vh.mFocusableView.sendAccessibilityEvent( 109 AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 110 } 111 } 112 113 @Override onUnbindViewHolder(Presenter.ViewHolder viewHolder)114 public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) { 115 ActionViewHolder vh = (ActionViewHolder) viewHolder; 116 vh.mIcon.setImageDrawable(null); 117 if (vh.mLabel != null) { 118 vh.mLabel.setText(null); 119 } 120 vh.mFocusableView.setContentDescription(null); 121 } 122 123 @Override setOnClickListener(Presenter.ViewHolder viewHolder, View.OnClickListener listener)124 public void setOnClickListener(Presenter.ViewHolder viewHolder, 125 View.OnClickListener listener) { 126 ((ActionViewHolder) viewHolder).mFocusableView.setOnClickListener(listener); 127 } 128 } 129 } 130