Bug 60907 Two progress dialogs when building WS + dragging a file into the navigator
build N20040503 - start the workspace - delete a view_menu.gif file from org.eclipse.ui\icons... - note for me that a build starts now - drag another file from the file system while the build is happening - drop it on the folder where the first file was deleted from two progress dialogs appear... see attachment.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/IDialogBlockedHandler.java
/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jface.dialogs;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Shell;
/**
 * The IDialogBlockedHandler is the handler used by
 * JFace to provide extra information when a
 * blocking has occured. There is one static instance
 * of this class used by WizardDialog and ModalContext.
 * @see org.eclipse.core.runtime.IProgressMonitorWithBlocking#clearBlocked()
 * @see  org.eclipse.core.runtime.IProgressMonitorWithBlocking#setBlocked(IStatus)
 * @see WizardDialog
 * @since 3.0
 */
public interface IDialogBlockedHandler {