content: /*
   * 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.android.setupwizardlib.items;
  
  import android.content.Context;
  import android.util.AttributeSet;
  import android.view.View;
  import android.widget.Button;
  import android.widget.LinearLayout;
  import com.android.setupwizardlib.R;
  import java.util.ArrayList;
  
  /**
   * A list item with one or more buttons, declared as {@link
   * com.android.setupwizardlib.items.ButtonItem}.
   *
   * <p>Example usage:
   *
   * <pre>{@code
   * &lt;ButtonBarItem&gt;
   *
   *     &lt;ButtonItem
   *         android:id="@+id/skip_button"
   *         android:text="@string/skip_button_label /&gt;
   *
   *     &lt;ButtonItem
   *         android:id="@+id/next_button"
   *         android:text="@string/next_button_label
   *         android:theme="@style/SuwButtonItem.Colored" /&gt;
   *
   * &lt;/ButtonBarItem&gt;
   * }</pre>
   */
  public class ButtonBarItem extends AbstractItem implements ItemInflater.ItemParent {
  
    private final ArrayList<ButtonItem> buttons = new ArrayList<>();
    private boolean visible = true;
  
    public ButtonBarItem() {
      super();
    }
  
    public ButtonBarItem(Context context, AttributeSet attrs) {
      super(context, attrs);
    }
  
    @Override
    public int getCount() {
      return isVisible() ? 1 : 0;
    }
  
    @Override
    public boolean isEnabled() {
      // The children buttons are enabled and clickable, but the item itself is not
      return false;
    }
  
    @Override
    public int getLayoutResource() {
      return R.layout.suw_items_button_bar;
    }
  
    public void setVisible(boolean visible) {
      this.visible = visible;
    }
  
    public boolean isVisible() {
      return visible;
    }
  
    @Override
    public int getViewId() {
      return getId();
    }
  
    @Override
    public void onBindView(View view) {
      // Note: The efficiency could be improved by trying to recycle the buttons created by
      // ButtonItem
      final LinearLayout layout = (LinearLayout) view;
      layout.removeAllViews();
  
      for (ButtonItem buttonItem : buttons) {
        Button button = buttonItem.createButton(layout);
        layout.addView(button);
      }
  
      view.setId(getViewId());
    }
  
    @Override
    public void addChild(ItemHierarchy child) {
      if (child instanceof ButtonItem) {
        buttons.add((ButtonItem) child);
      } else {
        throw new UnsupportedOperationException("Cannot add non-button item to Button Bar");
      }
    }
  
    @Override
    public ItemHierarchy findItemById(int id) {
      if (getId() == id) {
        return this;
      }
      for (ButtonItem button : buttons) {
        final ItemHierarchy item = button.findItemById(id);
        if (item != null) {
          return item;
        }
      }
      return null;
    }
  }
  