| /* |
| * Copyright (C) 2016 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 com.google.android.leanbackjank.presenter; |
| |
| import android.content.Context; |
| import android.graphics.drawable.Drawable; |
| import android.support.v17.leanback.widget.HeaderItem; |
| import android.support.v17.leanback.widget.ListRow; |
| import android.support.v17.leanback.widget.Presenter; |
| import android.support.v17.leanback.widget.RowHeaderPresenter; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.ImageView; |
| import android.widget.TextView; |
| |
| import com.google.android.leanbackjank.R; |
| |
| public class HeaderItemPresenter extends RowHeaderPresenter { |
| private float mUnselectedAlpha; |
| |
| @Override |
| public ViewHolder onCreateViewHolder(ViewGroup viewGroup) { |
| mUnselectedAlpha = viewGroup.getResources() |
| .getFraction(R.fraction.lb_browse_header_unselect_alpha, 1, 1); |
| LayoutInflater inflater = (LayoutInflater) viewGroup.getContext() |
| .getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| |
| View view = inflater.inflate(R.layout.header_item, null); |
| view.setAlpha(mUnselectedAlpha); // Initialize icons to be at half-opacity. |
| |
| return new ViewHolder(view); |
| } |
| |
| @Override |
| public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) { |
| HeaderItem headerItem = ((ListRow) item).getHeaderItem(); |
| View rootView = viewHolder.view; |
| rootView.setFocusable(true); |
| |
| ImageView iconView = (ImageView) rootView.findViewById(R.id.header_icon); |
| Drawable icon = rootView.getResources().getDrawable(R.drawable.android_header, null); |
| iconView.setImageDrawable(icon); |
| |
| TextView label = (TextView) rootView.findViewById(R.id.header_label); |
| label.setText(headerItem.getName()); |
| } |
| |
| @Override |
| public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) { |
| // no op |
| } |
| |
| // TODO: This is a temporary fix. Remove me when leanback onCreateViewHolder no longer sets the |
| // mUnselectAlpha, and also assumes the xml inflation will return a RowHeaderView. |
| @Override |
| protected void onSelectLevelChanged(RowHeaderPresenter.ViewHolder holder) { |
| holder.view.setAlpha( |
| mUnselectedAlpha + holder.getSelectLevel() * (1.0f - mUnselectedAlpha)); |
| } |
| } |