Android Open Source - android-wheel Items Range

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License

The source code is released under:

Apache License

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Java Source Code

/*
 *  Android Wheel Control.//from w  ww.  j av  a  2s.  com
 *  https://code.google.com/p/android-wheel/
 *  
 *  Copyright 2011 Yuri Kanivets
 *
 *  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 kankan.wheel.widget;

/**
 * Range for visible items.
 */
public class ItemsRange {
  // First item number
  private int first;
  
  // Items count
  private int count;

  /**
   * Default constructor. Creates an empty range
   */
    public ItemsRange() {
        this(0, 0);
    }
    
  /**
   * Constructor
   * @param first the number of first item
   * @param count the count of items
   */
  public ItemsRange(int first, int count) {
    this.first = first;
    this.count = count;
  }
  
  /**
   * Gets number of  first item
   * @return the number of the first item
   */
  public int getFirst() {
    return first;
  }
  
  /**
   * Gets number of last item
   * @return the number of last item
   */
  public int getLast() {
    return getFirst() + getCount() - 1;
  }
  
  /**
   * Get items count
   * @return the count of items
   */
  public int getCount() {
    return count;
  }
  
  /**
   * Tests whether item is contained by range
   * @param index the item number
   * @return true if item is contained
   */
  public boolean contains(int index) {
    return index >= getFirst() && index <= getLast();
  }
}

Java Source Code List