root/dwt/graphics/ImageLoaderEvent.d

/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 * Port to the D programming language:
 *     Frank Benoit <benoit@tionex.de>
 *******************************************************************************/
module dwt.graphics.ImageLoaderEvent;


public import dwt.internal.DWTEventObject;
public import dwt.graphics.ImageLoader;
public import dwt.graphics.ImageData;
import dwt.dwthelper.utils;

import tango.text.convert.Format;

/**
 * Instances of this class are sent as a result of the incremental
 * loading of image data.
 * <p>
 * <b>Notes:</b>
 * </p><ul>
 * <li>The number of events which will be sent when loading images
 * is not constant. It varies by image type, and for JPEG images it
 * varies from image to image.</li>
 * <li>For image sources which contain multiple images, the
 * <code>endOfImage</code> flag in the event will be set to true
 * after each individual image is loaded.</li>
 * </ul>
 *
 * @see ImageLoader
 * @see ImageLoaderListener
 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
 */

public class ImageLoaderEvent : DWTEventObject {

    /**
     * if the <code>endOfImage</code> flag is false, then this is a
     * partially complete copy of the current <code>ImageData</code>,
     * otherwise this is a completely loaded <code>ImageData</code>
     */
    public ImageData imageData;

    /**
     * the zero-based count of image data increments -- this is
     * equivalent to the number of events that have been generated
     * while loading a particular image
     */
    public int incrementCount;

    /**
     * If this flag is true, then the current image data has been
     * completely loaded, otherwise the image data is only partially
     * loaded, and further ImageLoader events will occur unless an
     * exception is thrown
     */
    public bool endOfImage;

    //static final long serialVersionUID = 3257284738325558065L;

/**
 * Constructs a new instance of this class given the event source and
 * the values to store in its fields.
 *
 * @param source the ImageLoader that was loading when the event occurred
 * @param imageData the image data for the event
 * @param incrementCount the image data increment for the event
 * @param endOfImage the end of image flag for the event
 */
public this(ImageLoader source, ImageData imageData, int incrementCount, bool endOfImage) {
    super(source);
    this.imageData = imageData;
    this.incrementCount = incrementCount;
    this.endOfImage = endOfImage;
}

/**
 * Returns a string containing a concise, human-readable
 * description of the receiver.
 *
 * @return a string representation of the event
 */
public override String toString () {
    return Format( "ImageLoaderEvent {source={} imageData={} incrementCount={} endOfImage={}}", source, imageData, incrementCount, endOfImage); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
}

}