Bug 37155 [Preferences] StringButtonFieldEditor should disable button when disabled.
setEnabled() should not only enable/disable the text string, it should also enable/disable the button, or should provide the capability for enabling/disabling the button separately. This problem is most evident when using a DirectoryFieldEditor. After disabling it, the user can still press on the "Browse..." button.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/StringButtonFieldEditor.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.preference;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.util.Assert;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.*;
/**
 * An abstract field editor for a string type preference that presents
 * a string input field with a change button to its right to edit the
 * input field's content. When the user presses the change button, the
 * abstract framework method <code>changePressed()</code> gets called
 * to compute a new string.
 */
public abstract class StringButtonFieldEditor extends StringFieldEditor {