Android Open Source - paperchains Aspect Quotient

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Apache License

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Java Source Code

/*
 * Copyright (c) 2010, Sony Ericsson Mobile Communication AB. All rights reserved.
 */*w  w  w  . ja  va  2  s.co m*/
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *    * Redistributions of source code must retain the above copyright notice, this
 *      list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the documentation
 *      and/or other materials provided with the distribution.
 *    * Neither the name of the Sony Ericsson Mobile Communication AB nor the names
 *      of its contributors may be used to endorse or promote products derived from
 *      this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.sonyericsson.zoom;

import java.util.Observable;

/**
 * Class that holds the aspect quotient, defined as content aspect ratio divided by view aspect ratio.
 */
public class AspectQuotient extends Observable {

  /**
   * Aspect quotient
   */
  private float mAspectQuotient;

  // Public methods

  /**
   * Gets aspect quotient
   *
   * @return The aspect quotient
   */
  public float get() {
    return mAspectQuotient;
  }

  /**
   * Updates and recalculates aspect quotient based on supplied view and content dimensions.
   *
   * @param viewWidth     Width of view
   * @param viewHeight    Height of view
   * @param contentWidth  Width of content
   * @param contentHeight Height of content
   */
  public void updateAspectQuotient(float viewWidth, float viewHeight, float contentWidth, float contentHeight) {
    final float aspectQuotient = (contentWidth / contentHeight) / (viewWidth / viewHeight);

    if (aspectQuotient != mAspectQuotient) {
      mAspectQuotient = aspectQuotient;
      setChanged();
    }
  }

}

Java Source Code List