Android Open Source - paperchains Zoom State

• Back to Sound/audio  ↑

From Project

Back to project page paperchains.

License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (c) 2010, Sony Ericsson Mobile Communication AB. All rights reserved.
 */* w w  w  .  j  a v  a2  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;

/**
 * A ZoomState holds zoom and pan values and allows the user to read and listen to changes. Clients that modify
 * ZoomState should call notifyObservers()
 */
public class ZoomState extends Observable {
  /**
   * Zoom level A value of 1.0 means the content fits the view.
   */
  private float mZoom;

  /**
   * Pan position x-coordinate X-coordinate of zoom window center position, relative to the width of the content.
   */
  private float mPanX;

  /**
   * Pan position y-coordinate Y-coordinate of zoom window center position, relative to the height of the content.
   */
  private float mPanY;

  // Public methods

  /**
   * Get current x-pan
   *
   * @return current x-pan
   */
  public float getPanX() {
    return mPanX;
  }

  /**
   * Get current y-pan
   *
   * @return Current y-pan
   */
  public float getPanY() {
    return mPanY;
  }

  /**
   * Get current zoom value
   *
   * @return Current zoom value
   */
  public float getZoom() {
    return mZoom;
  }

  /**
   * Help function for calculating current zoom value in x-dimension
   *
   * @param aspectQuotient (Aspect ratio content) / (Aspect ratio view)
   * @return Current zoom value in x-dimension
   */
  public float getZoomX(float aspectQuotient) {
    return Math.min(mZoom, mZoom * aspectQuotient);
  }

  /**
   * Help function for calculating current zoom value in y-dimension
   *
   * @param aspectQuotient (Aspect ratio content) / (Aspect ratio view)
   * @return Current zoom value in y-dimension
   */
  public float getZoomY(float aspectQuotient) {
    return Math.min(mZoom, mZoom / aspectQuotient);
  }

  /**
   * Set pan-x
   *
   * @param panX Pan-x value to set
   */
  public void setPanX(float panX) {
    if (panX != mPanX) {
      mPanX = panX;
      setChanged();
    }
  }

  /**
   * Set pan-y
   *
   * @param panY Pan-y value to set
   */
  public void setPanY(float panY) {
    if (panY != mPanY) {
      mPanY = panY;
      setChanged();
    }
  }

  /**
   * Set zoom
   *
   * @param zoom Zoom value to set
   */
  public void setZoom(float zoom) {
    if (zoom != mZoom) {
      mZoom = zoom;
      setChanged();
    }
  }

}

Java Source Code List

• Back to Sound/audio  ↑