    001// License: GPL. For details, see LICENSE file.
    002package org.openstreetmap.josm.plugins.streetside.utils;
    003
    004import java.awt.Image;
    005
    006import javax.swing.ImageIcon;
    007
    008import org.openstreetmap.josm.tools.Logging;
    009
    010public final class ImageUtil {
    011  private ImageUtil() {
    012    // Private constructor to avoid instantiation
    013  }
    014
    015  /**
    016   * Scales an {@link ImageIcon} to the desired size
    017   * @param icon the icon, which should be resized
    018   * @param size the desired length of the longest edge of the icon
    019   * @return the resized {@link ImageIcon}. It is the same object that you put in,
    020   *         only the contained {@link Image} is exchanged.
    021   */
    022  public static ImageIcon scaleImageIcon(final ImageIcon icon, int size) {
    023    Logging.debug("Scale icon {0} → {1}", icon.getIconWidth(), size);
    024    return new ImageIcon(icon.getImage().getScaledInstance(
    025      icon.getIconWidth() >= icon.getIconHeight() ? size : Math.max(1, Math.round(icon.getIconWidth() / (float) icon.getIconHeight() * size)),
    026      icon.getIconHeight() >= icon.getIconWidth() ? size : Math.max(1, Math.round(icon.getIconHeight() / (float) icon.getIconWidth() * size)),
    027      Image.SCALE_SMOOTH
    028    ));
    029  }
    030}