ImageHelper.java example

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VisAD-master
//
// ImageHelper.java
//

/*
VisAD system for interactive analysis and visualization of numerical
data.  Copyright (C) 1996 - 2017 Bill Hibbard, Curtis Rueden, Tom
Rink, Dave Glowacki, Steve Emmerson, Tom Whittaker, Don Murray, and
Tommy Jasmin.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA
*/

package visad.util;

import java.awt.Image;
import java.awt.image.ImageObserver;

/** Helper class for monitoring loading images. */
public class ImageHelper implements ImageObserver {

  /** flags whether image is bad */
  public boolean badImage = false;

  /** monitor image load */
  public boolean imageUpdate(Image i, int f, int x, int y, int w, int h) {
    boolean rtnval = true;
    if ((f & ABORT) != 0) {
      badImage = true;
      rtnval = false;
    }
    if ((f & ALLBITS) != 0) {
      rtnval = false;
    }
    if ((f & ERROR) != 0) {
      badImage = true;
      rtnval = false;
    }
    return rtnval;
  }

}