bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/PreferenceImportExportFileSelectionPage.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * 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.dialogs;

 import java.io.File;

 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.wizard.IWizardContainer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.FileDialog;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.internal.WorkbenchMessages;
 import org.eclipse.ui.internal.WorkbenchPlugin;
 import org.eclipse.ui.internal.util.Util;

 /**
  * The page -- used for both importing and exporting -- that allows the user to
  * select a file, as well as specify how many of the settings they want to use.
  *
  * @since 3.0
  */
 class PreferenceImportExportFileSelectionPage extends AbstractPreferenceImportExportPage {

 	/**
 	 * Listens for changes on the page, and updates the buttons.
 	 * @since 3.0
 	 */
 	private class PageChangeListener implements Listener {
 		/**
 		 * If the current page is not <code>null</code>, then this updates the
 		 * buttons on the wizard dialog.
 		 * @param event Ignored.
 		 */
 		public void handleEvent(Event event) {
 			IWizardContainer container = getContainer();
 			if (container.getCurrentPage() != null) {
 				container.updateButtons();
 			}
 		}
 	}

 	/**
 	 * The accepted extensions for the file chooser dialog.
 	 */
 	private static final String[] DIALOG_PREFERENCE_EXTENSIONS = new String[] { "*" + PREFERENCE_EXT, "*.*"}; //$NON-NLS-1$ //$NON-NLS-2$
 	/**
 	 * The message to display when there are no errors on this page.
 	 */
 	private static final String EXPORT_MESSAGE = WorkbenchMessages.getString("ImportExportPages.exportFileSelect"); //$NON-NLS-1$
 	/**
 	 * The message to display when there are no errors on this page.
 	 */
 	private static final String IMPORT_MESSAGE = WorkbenchMessages.getString("ImportExportPages.importFileSelect"); //$NON-NLS-1$
 	/**
 	 * The name of this page -- used to find the page later.
 	 */
 	private static final String NAME = "org.eclipse.ui.preferences.importExportFileSelectionPage"; //$NON-NLS-1$
 	/**
 	 * The radio button signifying that all modified preferences should be
 	 * imported from or exported to the given file.
 	 */
 	private Button allItemsRadioButton;

 	/**
 	 * Updates the state of various widgets in response to changes on the page.
 	 */
 	public final Listener changeListener = new PageChangeListener();
 	/**
 	 * The text widget containing the absolute path to the file from which to
 	 * import or to which to export.
 	 */
 	private Text fileText;
 	/**
 	 * The radio button signifying that all modified preferences from the
 	 * currently active page should be exported.
 	 */
 	private Button pageItemsRadioButton;
 	/**
 	 * The radio button signifying that the user wishes to review the selected
 	 * preferences, and choose which ones to export.
 	 */
 	private Button selectItemsRadioButton;

 	/**
 	 * Constructs a new instance of the file selection page.
 	 * @param exportWizard Whether this page should be opened in export mode.
 	 */
 	PreferenceImportExportFileSelectionPage(boolean exportWizard) {
 		super(NAME, exportWizard);
 	}

 	/**
 	 * Whether this page can finish.  This page can finish if all the data is
 	 * valid and the user doesn't want to select the individual preferences.
 	 * @return <code>true</code> If the finish button should be enabled;
 	 * <code>false</code> otherwise.
 	 */
 	boolean canFinish() {
 		return validate() && !wantsPreferencesSelected();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.jface.wizard.IWizardPage#canFlipToNextPage()
 	 */
 	public boolean canFlipToNextPage() {
 		return validate() && wantsPreferencesSelected();
 	}

 	/**
 	 * Chooses the file to use for exporting or importing.  This opens a native
 	 * file dialog and sets <code>fileText</code> to the user selection.
 	 */
 	private void chooseFile() {
 		// Find the closest file/directory to what is currently entered.
 		String currentFileName = fileText.getText();

 		// Open a dialog allowing the user to choose.
 		final FileDialog fileDialog = new FileDialog(getShell(), SWT.OPEN);
 		fileDialog.setFileName(currentFileName);
 		fileDialog.setFilterExtensions(DIALOG_PREFERENCE_EXTENSIONS);
 		currentFileName = fileDialog.open();

 		if (currentFileName == null)
 			return;

 		/* Append the default filename if none was specifed	and such a file does
 		 * not exist.
 		 */
 		String fileName = new File(currentFileName).getName();
 		if (fileName.lastIndexOf(".") == -1) { //$NON-NLS-1$
 			currentFileName += PREFERENCE_EXT;
 		}

 		fileText.setText(currentFileName);
 		canFlipToNextPage();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
 	 */
 	public void createControl(Composite parent) {
 	    Font parentFont = parent.getFont();
 		final Composite page = new Composite(parent, SWT.NONE);
 		GridLayout layout = new GridLayout(3, false);
 		page.setLayout(layout);
 		initializeDialogUnits(page);

 		// Set-up the title, subtitle and icon.
 		if (export) {
 			setTitle(EXPORT_TITLE);
 			setMessage(EXPORT_MESSAGE);
 			setImageDescriptor(getImageDescriptor("wizban/export_wiz.gif")); //$NON-NLS-1$
 		} else {
 			setTitle(IMPORT_TITLE);
 			setMessage(IMPORT_MESSAGE);
 			setImageDescriptor(getImageDescriptor("wizban/import_wiz.gif")); //$NON-NLS-1$
 		}

 		GridData layoutData;

 		// Set up the file selection label.
 		final Label fileLabel = new Label(page, SWT.NONE);
 		fileLabel.setText(WorkbenchMessages.getString("ImportExportPages.fileLabel")); //$NON-NLS-1$
 		fileLabel.setFont(parentFont);
 		layoutData = new GridData();
 		fileLabel.setLayoutData(layoutData);

 		// Set up the text widget containing the file selection.
 		fileText = new Text(page, SWT.SINGLE | SWT.BORDER);
 		fileText.setFont(parentFont);
 		layoutData = new GridData();
 		layoutData.grabExcessHorizontalSpace = true;
 		layoutData.horizontalAlignment = GridData.FILL;
 		fileText.setLayoutData(layoutData);
 		fileText.addListener(SWT.Modify, changeListener);

 		// Set up the button for choosing a file.
 		final Button browseButton = new Button(page, SWT.PUSH);
 		browseButton.setFont(parentFont);
 		layoutData = new GridData();
 		browseButton.setText(WorkbenchMessages.getString("ImportExportPages.browseButton")); //$NON-NLS-1$
 		layoutData.heightHint = convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
 		layoutData.widthHint = computePushButtonWidthHint(browseButton);
 		browseButton.setLayoutData(layoutData);
 		browseButton.addSelectionListener(new SelectionAdapter() {
 			public final void widgetSelected(SelectionEvent event) {
 				chooseFile();
 			}
 		});

 		// Insert a chunk of space below the file selection stuff.
 		final Composite verticalSpacer = new Composite(page, SWT.NONE);
 		layoutData = new GridData();
 		layoutData.heightHint = 15;
 		layoutData.horizontalSpan = 3;
 		verticalSpacer.setLayoutData(layoutData);

 		// Create the radio button for the export/import all option.
 		allItemsRadioButton = new Button(page, SWT.RADIO | SWT.CENTER);
 		allItemsRadioButton.setFont(parentFont);
 		layoutData = new GridData();
 		layoutData.horizontalSpan = 3;
 		allItemsRadioButton.setLayoutData(layoutData);
 		allItemsRadioButton.addListener(SWT.Selection, changeListener);

 		// Create the radio button for the select preferences to export/import.
 		selectItemsRadioButton = new Button(page, SWT.RADIO | SWT.CENTER);
 		selectItemsRadioButton.setFont(parentFont);
 		layoutData = new GridData();
 		layoutData.horizontalSpan = 3;
 		selectItemsRadioButton.setLayoutData(layoutData);
 		selectItemsRadioButton.addListener(SWT.Selection, changeListener);
 		selectItemsRadioButton.setEnabled(false); // TODO allow this option

 		if (export) {
 			/* If we are exporting, then we also have the option of exporting
 			 * items from the currently selected page.
 			 */
 			pageItemsRadioButton = new Button(page, SWT.RADIO | SWT.CENTER);
 			pageItemsRadioButton.setFont(parentFont);
 			layoutData = new GridData();
 			layoutData.horizontalSpan = 3;
 			pageItemsRadioButton.setLayoutData(layoutData);
 			pageItemsRadioButton.addListener(SWT.Selection, changeListener);
 			pageItemsRadioButton.setEnabled(false); // TODO allow this option

 			allItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.exportAllItems")); //$NON-NLS-1$
 			selectItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.exportSelectItems")); //$NON-NLS-1$
 			pageItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.exportPageItems")); //$NON-NLS-1$

 		} else {
 			allItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.importAllItems")); //$NON-NLS-1$
 			selectItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.importSelectItems")); //$NON-NLS-1$

 		}

 		// Remember the composite as the top-level control.
 		setControl(page);

 		// Restore all the controls to their previous values.
 		init();
 	}

 	/**
 	 * An accessor for the path the user has currently selected.
 	 * @return The path; may be empty (or invalid), but never <code>null</code>.
 	 */
 	String getPath() {
 		return fileText.getText();
 	}

 	/**
 	 * Initializes all the controls on this page by restoring their previous
 	 * values.
 	 */
 	private void init() {
         String lastFileName = WorkbenchPlugin.getDefault().getDialogSettings()
                 .get(WorkbenchPreferenceDialog.FILE_PATH_SETTING);
         if (lastFileName == null) {
             if (export) {
                 fileText
                         .setText(System.getProperty("user.dir") + System.getProperty("file.separator") + WorkbenchMessages.getString("ImportExportPages.preferenceFileName") + PREFERENCE_EXT); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
             }
         } else if ((export) || (new File(lastFileName).exists())) {
             fileText.setText(lastFileName);
         }

         allItemsRadioButton.setSelection(true);
     }

 	/**
 	 * Validates all of the data on the page to make sure that it is all valid.
 	 * If some of the data is invalid, then it displays an error message on the
 	 * page
 	 * @return <code>true</code> If the data is all valid; <code>false</code>
 	 * otherwise.
 	 */
 	boolean validate() {
 		final String fileName = fileText.getText();
         if (fileName.equals(Util.ZERO_LENGTH_STRING)) {
             setErrorMessage(null);
             return false;
         }

         final File currentFile = new File(fileName);
         if (export) {
             final File parentFile = currentFile.getParentFile();
             if (parentFile == null || !parentFile.exists()) {
                 setErrorMessage(WorkbenchMessages
                         .getString("ImportExportPages.errorDirectoryDoesNotExist")); //$NON-NLS-1$
                 return false;
             }
         } else {
             if (!currentFile.exists()) {
                 setErrorMessage(WorkbenchMessages
                         .getString("ImportExportPages.errorImportFileDoesNotExist")); //$NON-NLS-1$
                 return false;
             }
         }

         setErrorMessage(null);
         return true;
 	}

 	/**
 	 * Whether the user has asked to select the preferences by hand.
 	 * @return <code>true</code> If the user wants to select the preference by
 	 * hand; <code>false</code> otherwise.
 	 */
 	boolean wantsPreferencesSelected() {
 		return (selectItemsRadioButton != null) && (selectItemsRadioButton.getSelection());
 	}
 }
	/*******************************************************************************
	* 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.dialogs;

	import java.io.File;

	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.wizard.IWizardContainer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Font;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.FileDialog;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.internal.WorkbenchMessages;
	import org.eclipse.ui.internal.WorkbenchPlugin;
	import org.eclipse.ui.internal.util.Util;

	/**
	* The page -- used for both importing and exporting -- that allows the user to
	* select a file, as well as specify how many of the settings they want to use.
	*
	* @since 3.0
	*/
	class PreferenceImportExportFileSelectionPage extends AbstractPreferenceImportExportPage {

	/**
	* Listens for changes on the page, and updates the buttons.
	* @since 3.0
	*/
	private class PageChangeListener implements Listener {
	/**
	* If the current page is not <code>null</code>, then this updates the
	* buttons on the wizard dialog.
	* @param event Ignored.
	*/
	public void handleEvent(Event event) {
	IWizardContainer container = getContainer();
	if (container.getCurrentPage() != null) {
	container.updateButtons();
	}
	}
	}

	/**
	* The accepted extensions for the file chooser dialog.
	*/
	private static final String[] DIALOG_PREFERENCE_EXTENSIONS = new String[] { "" + PREFERENCE_EXT, ".*"}; //$NON-NLS-1$ //$NON-NLS-2$
	/**
	* The message to display when there are no errors on this page.
	*/
	private static final String EXPORT_MESSAGE = WorkbenchMessages.getString("ImportExportPages.exportFileSelect"); //$NON-NLS-1$
	/**
	* The message to display when there are no errors on this page.
	*/
	private static final String IMPORT_MESSAGE = WorkbenchMessages.getString("ImportExportPages.importFileSelect"); //$NON-NLS-1$
	/**
	* The name of this page -- used to find the page later.
	*/
	private static final String NAME = "org.eclipse.ui.preferences.importExportFileSelectionPage"; //$NON-NLS-1$
	/**
	* The radio button signifying that all modified preferences should be
	* imported from or exported to the given file.
	*/
	private Button allItemsRadioButton;

	/**
	* Updates the state of various widgets in response to changes on the page.
	*/
	public final Listener changeListener = new PageChangeListener();
	/**
	* The text widget containing the absolute path to the file from which to
	* import or to which to export.
	*/
	private Text fileText;
	/**
	* The radio button signifying that all modified preferences from the
	* currently active page should be exported.
	*/
	private Button pageItemsRadioButton;
	/**
	* The radio button signifying that the user wishes to review the selected
	* preferences, and choose which ones to export.
	*/
	private Button selectItemsRadioButton;

	/**
	* Constructs a new instance of the file selection page.
	* @param exportWizard Whether this page should be opened in export mode.
	*/
	PreferenceImportExportFileSelectionPage(boolean exportWizard) {
	super(NAME, exportWizard);
	}

	/**
	* Whether this page can finish. This page can finish if all the data is
	* valid and the user doesn't want to select the individual preferences.
	* @return <code>true</code> If the finish button should be enabled;
	* <code>false</code> otherwise.
	*/
	boolean canFinish() {
	return validate() && !wantsPreferencesSelected();
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.wizard.IWizardPage#canFlipToNextPage()
	*/
	public boolean canFlipToNextPage() {
	return validate() && wantsPreferencesSelected();
	}

	/**
	* Chooses the file to use for exporting or importing. This opens a native
	* file dialog and sets <code>fileText</code> to the user selection.
	*/
	private void chooseFile() {
	// Find the closest file/directory to what is currently entered.
	String currentFileName = fileText.getText();

	// Open a dialog allowing the user to choose.
	final FileDialog fileDialog = new FileDialog(getShell(), SWT.OPEN);
	fileDialog.setFileName(currentFileName);
	fileDialog.setFilterExtensions(DIALOG_PREFERENCE_EXTENSIONS);
	currentFileName = fileDialog.open();

	if (currentFileName == null)
	return;

	/* Append the default filename if none was specifed and such a file does
	* not exist.
	*/
	String fileName = new File(currentFileName).getName();
	if (fileName.lastIndexOf(".") == -1) { //$NON-NLS-1$
	currentFileName += PREFERENCE_EXT;
	}

	fileText.setText(currentFileName);
	canFlipToNextPage();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
	*/
	public void createControl(Composite parent) {
	Font parentFont = parent.getFont();
	final Composite page = new Composite(parent, SWT.NONE);
	GridLayout layout = new GridLayout(3, false);
	page.setLayout(layout);
	initializeDialogUnits(page);

	// Set-up the title, subtitle and icon.
	if (export) {
	setTitle(EXPORT_TITLE);
	setMessage(EXPORT_MESSAGE);
	setImageDescriptor(getImageDescriptor("wizban/export_wiz.gif")); //$NON-NLS-1$
	} else {
	setTitle(IMPORT_TITLE);
	setMessage(IMPORT_MESSAGE);
	setImageDescriptor(getImageDescriptor("wizban/import_wiz.gif")); //$NON-NLS-1$
	}

	GridData layoutData;

	// Set up the file selection label.
	final Label fileLabel = new Label(page, SWT.NONE);
	fileLabel.setText(WorkbenchMessages.getString("ImportExportPages.fileLabel")); //$NON-NLS-1$
	fileLabel.setFont(parentFont);
	layoutData = new GridData();
	fileLabel.setLayoutData(layoutData);

	// Set up the text widget containing the file selection.
	fileText = new Text(page, SWT.SINGLE \| SWT.BORDER);
	fileText.setFont(parentFont);
	layoutData = new GridData();
	layoutData.grabExcessHorizontalSpace = true;
	layoutData.horizontalAlignment = GridData.FILL;
	fileText.setLayoutData(layoutData);
	fileText.addListener(SWT.Modify, changeListener);

	// Set up the button for choosing a file.
	final Button browseButton = new Button(page, SWT.PUSH);
	browseButton.setFont(parentFont);
	layoutData = new GridData();
	browseButton.setText(WorkbenchMessages.getString("ImportExportPages.browseButton")); //$NON-NLS-1$
	layoutData.heightHint = convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
	layoutData.widthHint = computePushButtonWidthHint(browseButton);
	browseButton.setLayoutData(layoutData);
	browseButton.addSelectionListener(new SelectionAdapter() {
	public final void widgetSelected(SelectionEvent event) {
	chooseFile();
	}
	});

	// Insert a chunk of space below the file selection stuff.
	final Composite verticalSpacer = new Composite(page, SWT.NONE);
	layoutData = new GridData();
	layoutData.heightHint = 15;
	layoutData.horizontalSpan = 3;
	verticalSpacer.setLayoutData(layoutData);

	// Create the radio button for the export/import all option.
	allItemsRadioButton = new Button(page, SWT.RADIO \| SWT.CENTER);
	allItemsRadioButton.setFont(parentFont);
	layoutData = new GridData();
	layoutData.horizontalSpan = 3;
	allItemsRadioButton.setLayoutData(layoutData);
	allItemsRadioButton.addListener(SWT.Selection, changeListener);

	// Create the radio button for the select preferences to export/import.
	selectItemsRadioButton = new Button(page, SWT.RADIO \| SWT.CENTER);
	selectItemsRadioButton.setFont(parentFont);
	layoutData = new GridData();
	layoutData.horizontalSpan = 3;
	selectItemsRadioButton.setLayoutData(layoutData);
	selectItemsRadioButton.addListener(SWT.Selection, changeListener);
	selectItemsRadioButton.setEnabled(false); // TODO allow this option

	if (export) {
	/* If we are exporting, then we also have the option of exporting
	* items from the currently selected page.
	*/
	pageItemsRadioButton = new Button(page, SWT.RADIO \| SWT.CENTER);
	pageItemsRadioButton.setFont(parentFont);
	layoutData = new GridData();
	layoutData.horizontalSpan = 3;
	pageItemsRadioButton.setLayoutData(layoutData);
	pageItemsRadioButton.addListener(SWT.Selection, changeListener);
	pageItemsRadioButton.setEnabled(false); // TODO allow this option

	allItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.exportAllItems")); //$NON-NLS-1$
	selectItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.exportSelectItems")); //$NON-NLS-1$
	pageItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.exportPageItems")); //$NON-NLS-1$

	} else {
	allItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.importAllItems")); //$NON-NLS-1$
	selectItemsRadioButton.setText(WorkbenchMessages.getString("ImportExportPages.importSelectItems")); //$NON-NLS-1$

	}

	// Remember the composite as the top-level control.
	setControl(page);

	// Restore all the controls to their previous values.
	init();
	}

	/**
	* An accessor for the path the user has currently selected.
	* @return The path; may be empty (or invalid), but never <code>null</code>.
	*/
	String getPath() {
	return fileText.getText();
	}

	/**
	* Initializes all the controls on this page by restoring their previous
	* values.
	*/
	private void init() {
	String lastFileName = WorkbenchPlugin.getDefault().getDialogSettings()
	.get(WorkbenchPreferenceDialog.FILE_PATH_SETTING);
	if (lastFileName == null) {
	if (export) {
	fileText
	.setText(System.getProperty("user.dir") + System.getProperty("file.separator") + WorkbenchMessages.getString("ImportExportPages.preferenceFileName") + PREFERENCE_EXT); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
	}
	} else if ((export) \|\| (new File(lastFileName).exists())) {
	fileText.setText(lastFileName);
	}

	allItemsRadioButton.setSelection(true);
	}

	/**
	* Validates all of the data on the page to make sure that it is all valid.
	* If some of the data is invalid, then it displays an error message on the
	* page
	* @return <code>true</code> If the data is all valid; <code>false</code>
	* otherwise.
	*/
	boolean validate() {
	final String fileName = fileText.getText();
	if (fileName.equals(Util.ZERO_LENGTH_STRING)) {
	setErrorMessage(null);
	return false;
	}

	final File currentFile = new File(fileName);
	if (export) {
	final File parentFile = currentFile.getParentFile();
	if (parentFile == null \|\| !parentFile.exists()) {
	setErrorMessage(WorkbenchMessages
	.getString("ImportExportPages.errorDirectoryDoesNotExist")); //$NON-NLS-1$
	return false;
	}
	} else {
	if (!currentFile.exists()) {
	setErrorMessage(WorkbenchMessages
	.getString("ImportExportPages.errorImportFileDoesNotExist")); //$NON-NLS-1$
	return false;
	}
	}

	setErrorMessage(null);
	return true;
	}

	/**
	* Whether the user has asked to select the preferences by hand.
	* @return <code>true</code> If the user wants to select the preference by
	* hand; <code>false</code> otherwise.
	*/
	boolean wantsPreferencesSelected() {
	return (selectItemsRadioButton != null) && (selectItemsRadioButton.getSelection());
	}
	}