content: /*
   * Copyright (c) 2014 Android Alliance, LTD
   *
   * 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 uk.co.androidalliance.edgeeffectoverride;
  
  import android.widget.AbsListView;
  
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.Set;
  
  public class MulticastOnScrollListener implements AbsListView.OnScrollListener {
  
      private Set<AbsListView.OnScrollListener> mListeners = new HashSet<AbsListView.OnScrollListener>();
  
      public MulticastOnScrollListener add(AbsListView.OnScrollListener scrollListener) {
          mListeners.add(scrollListener);
          return this;
      }
  
      public MulticastOnScrollListener clear() {
          mListeners.clear();
          return this;
      }
  
      @Override
      public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
          Iterator iterator = this.mListeners.iterator();
          while (iterator.hasNext()) {
              ((AbsListView.OnScrollListener) iterator.next()).onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
          }
      }
  
      @Override
      public void onScrollStateChanged(AbsListView view, int scrollState) {
          Iterator iterator = mListeners.iterator();
          while (iterator.hasNext()) {
              ((AbsListView.OnScrollListener) iterator.next()).onScrollStateChanged(view, scrollState);
          }
      }
  
      public MulticastOnScrollListener remove(AbsListView.OnScrollListener scrollListener) {
          mListeners.remove(scrollListener);
          return this;
      }
  }
  