Esempio n. 1
0
  /**
   * Gets (creates if necessary) disabled icon based on the passed one.
   *
   * @return <code>ImageIcon</code> constructed from disabled image of passed icon.
   */
  @Nullable
  public static Icon getDisabledIcon(Icon icon) {
    if (icon instanceof LazyIcon) icon = ((LazyIcon) icon).getOrComputeIcon();
    if (icon == null) return null;

    Icon disabledIcon = ourIcon2DisabledIcon.get(icon);
    if (disabledIcon == null) {
      if (!isGoodSize(icon)) {
        LOG.error(icon); // # 22481
        return EMPTY_ICON;
      }
      final int scale = UIUtil.isRetina() ? 2 : 1;
      @SuppressWarnings("UndesirableClassUsage")
      BufferedImage image =
          new BufferedImage(
              scale * icon.getIconWidth(),
              scale * icon.getIconHeight(),
              BufferedImage.TYPE_INT_ARGB);
      final Graphics2D graphics = image.createGraphics();

      graphics.setColor(UIUtil.TRANSPARENT_COLOR);
      graphics.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
      graphics.scale(scale, scale);
      icon.paintIcon(LabelHolder.ourFakeComponent, graphics, 0, 0);

      graphics.dispose();

      Image img = ImageUtil.filter(image, UIUtil.getGrayFilter());
      if (UIUtil.isRetina()) img = RetinaImage.createFrom(img, 2, ImageLoader.ourComponent);

      disabledIcon = new JBImageIcon(img);
      ourIcon2DisabledIcon.put(icon, disabledIcon);
    }
    return disabledIcon;
  }