| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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 |
| *******************************************************************************/ |
| package org.eclipse.jface.preference; |
| |
| import java.io.File; |
| |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.DirectoryDialog; |
| |
| /** |
| * A field editor for a directory path type preference. A standard directory |
| * dialog appears when the user presses the change button. |
| */ |
| public class DirectoryFieldEditor extends StringButtonFieldEditor { |
| /** |
| * Creates a new directory field editor |
| */ |
| protected DirectoryFieldEditor() { |
| } |
| |
| /** |
| * Creates a directory field editor. |
| * |
| * @param name the name of the preference this field editor works on |
| * @param labelText the label text of the field editor |
| * @param parent the parent of the field editor's control |
| */ |
| public DirectoryFieldEditor(String name, String labelText, Composite parent) { |
| init(name, labelText); |
| setErrorMessage(JFaceResources |
| .getString("DirectoryFieldEditor.errorMessage"));//$NON-NLS-1$ |
| setChangeButtonText(JFaceResources.getString("openBrowse"));//$NON-NLS-1$ |
| setValidateStrategy(VALIDATE_ON_FOCUS_LOST); |
| createControl(parent); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on StringButtonFieldEditor. |
| * Opens the directory chooser dialog and returns the selected directory. |
| */ |
| protected String changePressed() { |
| File f = new File(getTextControl().getText()); |
| if (!f.exists()) { |
| f = null; |
| } |
| File d = getDirectory(f); |
| if (d == null) { |
| return null; |
| } |
| |
| return d.getAbsolutePath(); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on StringFieldEditor. |
| * Checks whether the text input field contains a valid directory. |
| */ |
| protected boolean doCheckState() { |
| String fileName = getTextControl().getText(); |
| fileName = fileName.trim(); |
| if (fileName.length() == 0 && isEmptyStringAllowed()) { |
| return true; |
| } |
| File file = new File(fileName); |
| return file.isDirectory(); |
| } |
| |
| /** |
| * Helper that opens the directory chooser dialog. |
| * @param startingDirectory The directory the dialog will open in. |
| * @return File File or <code>null</code>. |
| * |
| */ |
| private File getDirectory(File startingDirectory) { |
| |
| DirectoryDialog fileDialog = new DirectoryDialog(getShell(), SWT.OPEN); |
| if (startingDirectory != null) { |
| fileDialog.setFilterPath(startingDirectory.getPath()); |
| } |
| String dir = fileDialog.open(); |
| if (dir != null) { |
| dir = dir.trim(); |
| if (dir.length() > 0) { |
| return new File(dir); |
| } |
| } |
| |
| return null; |
| } |
| } |