/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package android.support.v17.leanback.widget; /** * Interface for receiving notification when a row or item becomes selected. */ public interface OnItemViewSelectedListener { /** * Called when the a row or a new item becomes selected. The concept of current selection * is different than focus. Row or item can be selected even they don't have focus. * Having the concept of selection will allow developer to switch background to selected * item or selected row when user selects rows outside row UI (e.g. headers left of * rows). *
* For a none {@link ListRow} case, parameter item is always null. Event is fired when * selection changes between rows, regardless if row view has focus or not. *
* For a {@link ListRow} case, parameter item can be null if the list row is empty. *
** In the case of a grid, the row parameter is always null. *
*