| /* |
| * Copyright (C) 2015 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.android.tv.ui.sidepanel; |
| |
| import android.support.annotation.UiThread; |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| @UiThread |
| public abstract class Item { |
| private View mItemView; |
| private boolean mEnabled = true; |
| private boolean mClickable = true; |
| |
| public void setEnabled(boolean enabled) { |
| if (mEnabled != enabled) { |
| mEnabled = enabled; |
| if (mItemView != null) { |
| setEnabledInternal(mItemView, enabled); |
| } |
| } |
| } |
| |
| /** |
| * Sets the item to be clickable or not. |
| */ |
| public void setClickable(boolean clickable) { |
| mClickable = clickable; |
| if (mItemView != null) { |
| mItemView.setClickable(clickable); |
| } |
| } |
| |
| /** |
| * Returns whether this item is enabled. |
| */ |
| public boolean isEnabled() { |
| return mEnabled; |
| } |
| |
| public final void notifyUpdated() { |
| if (mItemView != null) { |
| onUpdate(); |
| } |
| } |
| |
| protected abstract int getResourceId(); |
| |
| protected void onBind(View view) { |
| mItemView = view; |
| } |
| |
| protected void onUnbind() { |
| mItemView = null; |
| } |
| |
| /** |
| * Called after onBind is called and when {@link #notifyUpdated} is called. |
| * {@link #notifyUpdated} is usually called by {@link SideFragment#notifyItemChanged} and |
| * {@link SideFragment#notifyItemsChanged}. |
| */ |
| protected void onUpdate() { |
| setEnabledInternal(mItemView, mEnabled); |
| mItemView.setClickable(mClickable); |
| } |
| |
| protected abstract void onSelected(); |
| |
| protected void onFocused() { |
| } |
| |
| /** |
| * Returns true if the item is bound, i.e., onBind is called. |
| */ |
| protected boolean isBound() { |
| return mItemView != null; |
| } |
| |
| private void setEnabledInternal(View view, boolean enabled) { |
| view.setEnabled(enabled); |
| if (view instanceof ViewGroup) { |
| ViewGroup parent = (ViewGroup) view; |
| int childCount = parent.getChildCount(); |
| for (int i = 0; i < childCount; ++i) { |
| setEnabledInternal(parent.getChildAt(i), enabled); |
| } |
| } |
| } |
| } |