Bug 60832 [Navigator] Open Resource should not offer to open derived resources
1) Navigate>Open Resource... ->observe the dialog shows generated class files and copied resource files in the output folder These are both derived resources and it is almost never helpful to navigate to them. The simplest solution is to filter out resources which are marked as derived (search is using the same approach to avoid searching in derived resources)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/OpenResourceDialog.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.ui.internal.ide.dialogs;
import org.eclipse.core.resources.IContainer;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ResourceListSelectionDialog;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.internal.ide.IHelpContextIds;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
/**
 * Shows a list of resources to the user with a text entry field
 * for a string pattern used to filter the list of resources.
 *
 * @since 2.1
 */
public class OpenResourceDialog extends ResourceListSelectionDialog {