bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/AutoSavePreferencePage.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2016 Obeo 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:
  *     Axel Richard <axel.richard@obeo.fr> - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.ide.dialogs;

 import org.eclipse.jface.preference.FieldEditor;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.preference.IntegerFieldEditor;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.jface.preference.StringFieldEditor;
 import org.eclipse.jface.util.IPropertyChangeListener;
 import org.eclipse.jface.util.PropertyChangeEvent;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 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.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.internal.IPreferenceConstants;
 import org.eclipse.ui.internal.WorkbenchPlugin;
 import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;

 /**
  * Preference page that allows to enable auto-save for textual editors.
  *
  * @since 3.12
  *
  */
 public class AutoSavePreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

 	private Button autoSaveButton;

 	private Group autoSaveGroup;

 	private Composite intervalComposite;

 	private IntegerFieldEditor intervalField;

 	private Label resetMessage;

 	private Label noteLabel;

 	private Label noteMessage;

 	private IPropertyChangeListener validityChangeListener = new IPropertyChangeListener() {
 		@Override
 		public void propertyChange(PropertyChangeEvent event) {
 			if (event.getProperty().equals(FieldEditor.IS_VALID)) {
 				updateValidState();
 			}
 		}
 	};

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
 	 */
 	@Override
 	public void init(IWorkbench workbench) {
 		// Nothing to do here.
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.
 	 * swt.widgets.Composite)
 	 */
 	@Override
 	protected Control createContents(Composite parent) {
 		final Composite composite = createComposite(parent);
 		createAutoSaveCheckbox(composite);
 		createAutoSaveGroup(composite);
 		createIntervalPart();
 		createMessagesPart();
 		return composite;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jface.preference.PreferencePage#performDefaults()
 	 */
 	@Override
 	public void performDefaults() {
 		boolean autoSave = getPreferenceStore().getDefaultBoolean(IPreferenceConstants.SAVE_AUTOMATICALLY);
 		autoSaveButton.setSelection(autoSave);
 		autoSaveButton.notifyListeners(SWT.Selection, new Event());
 		int interval = getPreferenceStore().getDefaultInt(IPreferenceConstants.SAVE_AUTOMATICALLY_INTERVAL);
 		intervalField.setStringValue(String.valueOf(interval));
 		intervalField.setEnabled(autoSave, intervalComposite);

 		super.performDefaults();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jface.preference.PreferencePage#performOk()
 	 */
 	@Override
 	public boolean performOk() {
 		if (isValid()) {
 			getPreferenceStore().setValue(IPreferenceConstants.SAVE_AUTOMATICALLY, autoSaveButton.getSelection());
 			getPreferenceStore().setValue(IPreferenceConstants.SAVE_AUTOMATICALLY_INTERVAL,
 					intervalField.getTextControl(intervalComposite).getText());
 		}
 		return super.performOk();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jface.preference.PreferencePage#doGetPreferenceStore()
 	 */
 	@Override
 	protected IPreferenceStore doGetPreferenceStore() {
 		return WorkbenchPlugin.getDefault().getPreferenceStore();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jface.dialogs.DialogPage#dispose()
 	 */
 	@Override
 	public void dispose() {
 		intervalField.setPropertyChangeListener(null);
 		noteMessage.dispose();
 		noteLabel.dispose();
 		resetMessage.dispose();
 		intervalField.dispose();
 		intervalComposite.dispose();
 		autoSaveGroup.dispose();
 		autoSaveButton.dispose();
 		super.dispose();
 	}

 	/**
 	 * For tests purpose only. Check auto-save checkbox button state
 	 * programmatically. A call of this method when the auto-save preference
 	 * page is closed will return false.
 	 *
 	 * @return true if auto-save checkbox button is selected, false otherwise
 	 */
 	protected boolean isAutoSaveButtonSelected() {
 		final boolean enabled;
 		if (autoSaveButton != null && !autoSaveButton.isDisposed()) {
 			enabled = autoSaveButton.getSelection();
 		} else {
 			enabled = false;
 		}
 		return enabled;
 	}

 	/**
 	 * For tests purpose only. Select/unselect auto-save checkbox button
 	 * programmatically. A call of this method when the auto-save preference
 	 * page is closed won't do anything.
 	 *
 	 * @param enable
 	 *            true to select auto-save, false to unselect
 	 */
 	protected void selectAutoSaveButton(boolean enable) {
 		if (autoSaveButton != null && !autoSaveButton.isDisposed()) {
 			autoSaveButton.setSelection(enable);
 			autoSaveButton.notifyListeners(SWT.Selection, new Event());
 		}
 	}

 	/**
 	 * For tests purpose only. Get auto-save interval text field value
 	 * programmatically. A call of this method when the auto-save preference
 	 * page is closed will return 0.
 	 *
 	 * @return the value contained in the interval text field, 0 otherwise.
 	 */
 	protected int getAutoSaveIntervalTextValue() {
 		final int interval;
 		if (intervalField != null && intervalComposite != null
 				&& !intervalField.getTextControl(intervalComposite).isDisposed()) {
 			interval = intervalField.getIntValue();
 		} else {
 			interval = 0;
 		}
 		return interval;
 	}

 	/**
 	 * For tests purpose only.Set auto-save interval text field value
 	 * programmatically. A call of this method when the auto-save preference
 	 * page is closed won't do anything.
 	 *
 	 * @param interval
 	 *            the value to set (between 0 and Integer.MAX_VALUE).
 	 */
 	protected void setAutoSaveIntervalTextValue(int interval) {
 		if (intervalField != null && intervalComposite != null
 				&& !intervalField.getTextControl(intervalComposite).isDisposed()
 				&& autoSaveButton != null
 				&& !autoSaveButton.isDisposed() && autoSaveButton.getSelection()) {
 			intervalField.setStringValue(String.valueOf(interval));
 		}
 	}

 	/**
 	 * Update 'Apply' button state based on the value of the interval.
 	 */
 	protected void updateValidState() {
 		if (intervalField != null && !intervalField.isValid()) {
 			setValid(false);
 		} else {
 			setValid(true);
 		}

 	}

 	/**
 	 * Creates the top-level widget that will contain all widgets of this
 	 * preference page.
 	 *
 	 * @param parent
 	 *            the parent composite
 	 * @return the new widget
 	 */
 	protected Composite createComposite(Composite parent) {
 		final Composite composite = new Composite(parent, SWT.NULL);
 		final GridLayout layout = new GridLayout();
 		layout.numColumns = 1;
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		composite.setLayout(layout);
 		composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
 		return composite;
 	}

 	/**
 	 * Creates a checkbox widget, that will allow to enable/disable the
 	 * auto-save of editors in eclipse.
 	 *
 	 * @param composite
 	 *            the parent composite
 	 */
 	private void createAutoSaveCheckbox(Composite composite) {
 		autoSaveButton = new Button(composite, SWT.CHECK);
 		autoSaveButton.setText(IDEWorkbenchMessages.AutoSavePreferencPage_autoSaveButton);
 		autoSaveButton.setToolTipText(IDEWorkbenchMessages.AutoSavePreferencPage_autoSaveButton);
 		autoSaveButton.setSelection(getPreferenceStore().getBoolean(IPreferenceConstants.SAVE_AUTOMATICALLY));
 		autoSaveButton.addSelectionListener(new SelectionListener() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				boolean autoSave = autoSaveButton.getSelection();
 				getPreferenceStore().setValue(IPreferenceConstants.SAVE_AUTOMATICALLY, autoSave);
 				final Display display = autoSaveButton.getDisplay();
 				noteMessage.setEnabled(autoSave);
 				noteLabel.setEnabled(autoSave);
 				resetMessage.setEnabled(autoSave);
 				intervalField.getTextControl(intervalComposite).setEnabled(autoSave);
 				intervalField.getLabelControl(intervalComposite).setEnabled(autoSave);
 				intervalComposite.setEnabled(autoSave);
 				autoSaveGroup.setEnabled(autoSave);
 				if (autoSave) {
 					noteMessage.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
 					noteLabel.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
 					resetMessage.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
 					intervalField.getLabelControl(intervalComposite)
 							.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
 				} else {
 					noteMessage.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
 					noteLabel.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
 					resetMessage.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
 					intervalField.getLabelControl(intervalComposite)
 							.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
 				}
 			}

 			@Override
 			public void widgetDefaultSelected(SelectionEvent e) {
 				// Nothing to do here
 			}
 		});
 	}

 	/**
 	 * Creates a group widget that will contain the interval text field and
 	 * messages.
 	 *
 	 * @param composite
 	 *            the parent composite
 	 */
 	private void createAutoSaveGroup(Composite composite) {
 		autoSaveGroup = new Group(composite, SWT.NONE);
 		final GridLayout autoSaveGroupLayout = new GridLayout();
 		autoSaveGroupLayout.numColumns = 1;
 		autoSaveGroupLayout.marginWidth = 0;
 		autoSaveGroupLayout.marginHeight = 0;
 		autoSaveGroup.setLayout(autoSaveGroupLayout);
 		final GridData autoSaveGroupLayoutData = new GridData();
 		autoSaveGroupLayoutData.horizontalAlignment = GridData.FILL;
 		autoSaveGroupLayoutData.grabExcessHorizontalSpace = true;
 		autoSaveGroup.setLayoutData(autoSaveGroupLayoutData);
 		autoSaveGroup.setEnabled(autoSaveButton.getSelection());
 	}

 	/**
 	 * Creates a widget with a text, a text field (to handle the interval) and a
 	 * text.
 	 */
 	private void createIntervalPart() {
 		intervalComposite = new Composite(autoSaveGroup, SWT.NONE);
 		final GridLayout intervalCompositeLayout = new GridLayout();
 		intervalCompositeLayout.numColumns = 2;
 		intervalCompositeLayout.marginWidth = 0;
 		intervalCompositeLayout.marginHeight = 10;
 		intervalComposite.setLayout(intervalCompositeLayout);
 		final GridData intervalCompositeLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false);
 		intervalComposite.setLayoutData(intervalCompositeLayoutData);
 		intervalComposite.setEnabled(autoSaveButton.getSelection());

 		intervalField = new IntegerFieldEditor(IPreferenceConstants.SAVE_AUTOMATICALLY_INTERVAL, "", //$NON-NLS-1$
 				intervalComposite);
 		intervalField.setLabelText(IDEWorkbenchMessages.AutoSavePreferencPage_intervalMessage);
 		intervalField.setPreferenceStore(WorkbenchPlugin.getDefault().getPreferenceStore());
 		intervalField.setPage(this);
 		intervalField.setTextLimit(10);
 		intervalField.setErrorMessage(IDEWorkbenchMessages.AutoSavePreferencPage_errorMessage);
 		intervalField.setValidateStrategy(StringFieldEditor.VALIDATE_ON_KEY_STROKE);
 		intervalField.setValidRange(1, Integer.MAX_VALUE);
 		intervalField.load();
 		intervalField.getLabelControl(intervalComposite).setEnabled(autoSaveButton.getSelection());
 		intervalField.getTextControl(intervalComposite).setEnabled(autoSaveButton.getSelection());
 		intervalField.setPropertyChangeListener(validityChangeListener);

 	}

 	/**
 	 * Creates information messages.
 	 */
 	private void createMessagesPart() {
 		resetMessage = new Label(autoSaveGroup, SWT.WRAP);
 		resetMessage.setText(IDEWorkbenchMessages.AutoSavePreferencPage_resetMessage);
 		final GridData resetMessageLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false);
 		resetMessageLayoutData.widthHint = 350;
 		resetMessage.setLayoutData(resetMessageLayoutData);

 		final Composite noteComposite = new Composite(autoSaveGroup, SWT.NONE);
 		final GridLayout messageLayout = new GridLayout();
 		messageLayout.numColumns = 2;
 		messageLayout.marginWidth = 0;
 		messageLayout.marginHeight = 0;
 		noteComposite.setLayout(messageLayout);
 		final GridData noteCompositeData = new GridData(SWT.FILL, SWT.FILL, true, false);
 		noteComposite.setLayoutData(noteCompositeData);

 		noteLabel = new Label(noteComposite, SWT.NONE);
 		noteLabel.setText(IDEWorkbenchMessages.AutoSavePreferencPage_noteLabel);
 		noteLabel.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));

 		noteMessage = new Label(noteComposite, SWT.WRAP);
 		noteMessage.setText(IDEWorkbenchMessages.AutoSavePreferencPage_noteMessage);
 		final GridData noteMessageData = new GridData(SWT.FILL, SWT.FILL, true, false);
 		noteMessageData.widthHint = 350;
 		noteMessage.setLayoutData(noteMessageData);
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2016 Obeo 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:
	* Axel Richard <axel.richard@obeo.fr> - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ui.internal.ide.dialogs;

	import org.eclipse.jface.preference.FieldEditor;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.preference.IntegerFieldEditor;
	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.jface.preference.StringFieldEditor;
	import org.eclipse.jface.util.IPropertyChangeListener;
	import org.eclipse.jface.util.PropertyChangeEvent;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	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.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPreferencePage;
	import org.eclipse.ui.internal.IPreferenceConstants;
	import org.eclipse.ui.internal.WorkbenchPlugin;
	import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;

	/**
	* Preference page that allows to enable auto-save for textual editors.
	*
	* @since 3.12
	*
	*/
	public class AutoSavePreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

	private Button autoSaveButton;

	private Group autoSaveGroup;

	private Composite intervalComposite;

	private IntegerFieldEditor intervalField;

	private Label resetMessage;

	private Label noteLabel;

	private Label noteMessage;

	private IPropertyChangeListener validityChangeListener = new IPropertyChangeListener() {
	@Override
	public void propertyChange(PropertyChangeEvent event) {
	if (event.getProperty().equals(FieldEditor.IS_VALID)) {
	updateValidState();
	}
	}
	};

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
	*/
	@Override
	public void init(IWorkbench workbench) {
	// Nothing to do here.
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.
	* swt.widgets.Composite)
	*/
	@Override
	protected Control createContents(Composite parent) {
	final Composite composite = createComposite(parent);
	createAutoSaveCheckbox(composite);
	createAutoSaveGroup(composite);
	createIntervalPart();
	createMessagesPart();
	return composite;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.preference.PreferencePage#performDefaults()
	*/
	@Override
	public void performDefaults() {
	boolean autoSave = getPreferenceStore().getDefaultBoolean(IPreferenceConstants.SAVE_AUTOMATICALLY);
	autoSaveButton.setSelection(autoSave);
	autoSaveButton.notifyListeners(SWT.Selection, new Event());
	int interval = getPreferenceStore().getDefaultInt(IPreferenceConstants.SAVE_AUTOMATICALLY_INTERVAL);
	intervalField.setStringValue(String.valueOf(interval));
	intervalField.setEnabled(autoSave, intervalComposite);

	super.performDefaults();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.preference.PreferencePage#performOk()
	*/
	@Override
	public boolean performOk() {
	if (isValid()) {
	getPreferenceStore().setValue(IPreferenceConstants.SAVE_AUTOMATICALLY, autoSaveButton.getSelection());
	getPreferenceStore().setValue(IPreferenceConstants.SAVE_AUTOMATICALLY_INTERVAL,
	intervalField.getTextControl(intervalComposite).getText());
	}
	return super.performOk();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.preference.PreferencePage#doGetPreferenceStore()
	*/
	@Override
	protected IPreferenceStore doGetPreferenceStore() {
	return WorkbenchPlugin.getDefault().getPreferenceStore();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.dialogs.DialogPage#dispose()
	*/
	@Override
	public void dispose() {
	intervalField.setPropertyChangeListener(null);
	noteMessage.dispose();
	noteLabel.dispose();
	resetMessage.dispose();
	intervalField.dispose();
	intervalComposite.dispose();
	autoSaveGroup.dispose();
	autoSaveButton.dispose();
	super.dispose();
	}

	/**
	* For tests purpose only. Check auto-save checkbox button state
	* programmatically. A call of this method when the auto-save preference
	* page is closed will return false.
	*
	* @return true if auto-save checkbox button is selected, false otherwise
	*/
	protected boolean isAutoSaveButtonSelected() {
	final boolean enabled;
	if (autoSaveButton != null && !autoSaveButton.isDisposed()) {
	enabled = autoSaveButton.getSelection();
	} else {
	enabled = false;
	}
	return enabled;
	}

	/**
	* For tests purpose only. Select/unselect auto-save checkbox button
	* programmatically. A call of this method when the auto-save preference
	* page is closed won't do anything.
	*
	* @param enable
	* true to select auto-save, false to unselect
	*/
	protected void selectAutoSaveButton(boolean enable) {
	if (autoSaveButton != null && !autoSaveButton.isDisposed()) {
	autoSaveButton.setSelection(enable);
	autoSaveButton.notifyListeners(SWT.Selection, new Event());
	}
	}

	/**
	* For tests purpose only. Get auto-save interval text field value
	* programmatically. A call of this method when the auto-save preference
	* page is closed will return 0.
	*
	* @return the value contained in the interval text field, 0 otherwise.
	*/
	protected int getAutoSaveIntervalTextValue() {
	final int interval;
	if (intervalField != null && intervalComposite != null
	&& !intervalField.getTextControl(intervalComposite).isDisposed()) {
	interval = intervalField.getIntValue();
	} else {
	interval = 0;
	}
	return interval;
	}

	/**
	* For tests purpose only.Set auto-save interval text field value
	* programmatically. A call of this method when the auto-save preference
	* page is closed won't do anything.
	*
	* @param interval
	* the value to set (between 0 and Integer.MAX_VALUE).
	*/
	protected void setAutoSaveIntervalTextValue(int interval) {
	if (intervalField != null && intervalComposite != null
	&& !intervalField.getTextControl(intervalComposite).isDisposed()
	&& autoSaveButton != null
	&& !autoSaveButton.isDisposed() && autoSaveButton.getSelection()) {
	intervalField.setStringValue(String.valueOf(interval));
	}
	}

	/**
	* Update 'Apply' button state based on the value of the interval.
	*/
	protected void updateValidState() {
	if (intervalField != null && !intervalField.isValid()) {
	setValid(false);
	} else {
	setValid(true);
	}

	}

	/**
	* Creates the top-level widget that will contain all widgets of this
	* preference page.
	*
	* @param parent
	* the parent composite
	* @return the new widget
	*/
	protected Composite createComposite(Composite parent) {
	final Composite composite = new Composite(parent, SWT.NULL);
	final GridLayout layout = new GridLayout();
	layout.numColumns = 1;
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	composite.setLayout(layout);
	composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
	return composite;
	}

	/**
	* Creates a checkbox widget, that will allow to enable/disable the
	* auto-save of editors in eclipse.
	*
	* @param composite
	* the parent composite
	*/
	private void createAutoSaveCheckbox(Composite composite) {
	autoSaveButton = new Button(composite, SWT.CHECK);
	autoSaveButton.setText(IDEWorkbenchMessages.AutoSavePreferencPage_autoSaveButton);
	autoSaveButton.setToolTipText(IDEWorkbenchMessages.AutoSavePreferencPage_autoSaveButton);
	autoSaveButton.setSelection(getPreferenceStore().getBoolean(IPreferenceConstants.SAVE_AUTOMATICALLY));
	autoSaveButton.addSelectionListener(new SelectionListener() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	boolean autoSave = autoSaveButton.getSelection();
	getPreferenceStore().setValue(IPreferenceConstants.SAVE_AUTOMATICALLY, autoSave);
	final Display display = autoSaveButton.getDisplay();
	noteMessage.setEnabled(autoSave);
	noteLabel.setEnabled(autoSave);
	resetMessage.setEnabled(autoSave);
	intervalField.getTextControl(intervalComposite).setEnabled(autoSave);
	intervalField.getLabelControl(intervalComposite).setEnabled(autoSave);
	intervalComposite.setEnabled(autoSave);
	autoSaveGroup.setEnabled(autoSave);
	if (autoSave) {
	noteMessage.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
	noteLabel.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
	resetMessage.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
	intervalField.getLabelControl(intervalComposite)
	.setForeground(display.getSystemColor(SWT.COLOR_WIDGET_FOREGROUND));
	} else {
	noteMessage.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
	noteLabel.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
	resetMessage.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
	intervalField.getLabelControl(intervalComposite)
	.setForeground(display.getSystemColor(SWT.COLOR_TITLE_INACTIVE_FOREGROUND));
	}
	}

	@Override
	public void widgetDefaultSelected(SelectionEvent e) {
	// Nothing to do here
	}
	});
	}

	/**
	* Creates a group widget that will contain the interval text field and
	* messages.
	*
	* @param composite
	* the parent composite
	*/
	private void createAutoSaveGroup(Composite composite) {
	autoSaveGroup = new Group(composite, SWT.NONE);
	final GridLayout autoSaveGroupLayout = new GridLayout();
	autoSaveGroupLayout.numColumns = 1;
	autoSaveGroupLayout.marginWidth = 0;
	autoSaveGroupLayout.marginHeight = 0;
	autoSaveGroup.setLayout(autoSaveGroupLayout);
	final GridData autoSaveGroupLayoutData = new GridData();
	autoSaveGroupLayoutData.horizontalAlignment = GridData.FILL;
	autoSaveGroupLayoutData.grabExcessHorizontalSpace = true;
	autoSaveGroup.setLayoutData(autoSaveGroupLayoutData);
	autoSaveGroup.setEnabled(autoSaveButton.getSelection());
	}

	/**
	* Creates a widget with a text, a text field (to handle the interval) and a
	* text.
	*/
	private void createIntervalPart() {
	intervalComposite = new Composite(autoSaveGroup, SWT.NONE);
	final GridLayout intervalCompositeLayout = new GridLayout();
	intervalCompositeLayout.numColumns = 2;
	intervalCompositeLayout.marginWidth = 0;
	intervalCompositeLayout.marginHeight = 10;
	intervalComposite.setLayout(intervalCompositeLayout);
	final GridData intervalCompositeLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false);
	intervalComposite.setLayoutData(intervalCompositeLayoutData);
	intervalComposite.setEnabled(autoSaveButton.getSelection());

	intervalField = new IntegerFieldEditor(IPreferenceConstants.SAVE_AUTOMATICALLY_INTERVAL, "", //$NON-NLS-1$
	intervalComposite);
	intervalField.setLabelText(IDEWorkbenchMessages.AutoSavePreferencPage_intervalMessage);
	intervalField.setPreferenceStore(WorkbenchPlugin.getDefault().getPreferenceStore());
	intervalField.setPage(this);
	intervalField.setTextLimit(10);
	intervalField.setErrorMessage(IDEWorkbenchMessages.AutoSavePreferencPage_errorMessage);
	intervalField.setValidateStrategy(StringFieldEditor.VALIDATE_ON_KEY_STROKE);
	intervalField.setValidRange(1, Integer.MAX_VALUE);
	intervalField.load();
	intervalField.getLabelControl(intervalComposite).setEnabled(autoSaveButton.getSelection());
	intervalField.getTextControl(intervalComposite).setEnabled(autoSaveButton.getSelection());
	intervalField.setPropertyChangeListener(validityChangeListener);

	}

	/**
	* Creates information messages.
	*/
	private void createMessagesPart() {
	resetMessage = new Label(autoSaveGroup, SWT.WRAP);
	resetMessage.setText(IDEWorkbenchMessages.AutoSavePreferencPage_resetMessage);
	final GridData resetMessageLayoutData = new GridData(SWT.FILL, SWT.FILL, true, false);
	resetMessageLayoutData.widthHint = 350;
	resetMessage.setLayoutData(resetMessageLayoutData);

	final Composite noteComposite = new Composite(autoSaveGroup, SWT.NONE);
	final GridLayout messageLayout = new GridLayout();
	messageLayout.numColumns = 2;
	messageLayout.marginWidth = 0;
	messageLayout.marginHeight = 0;
	noteComposite.setLayout(messageLayout);
	final GridData noteCompositeData = new GridData(SWT.FILL, SWT.FILL, true, false);
	noteComposite.setLayoutData(noteCompositeData);

	noteLabel = new Label(noteComposite, SWT.NONE);
	noteLabel.setText(IDEWorkbenchMessages.AutoSavePreferencPage_noteLabel);
	noteLabel.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));

	noteMessage = new Label(noteComposite, SWT.WRAP);
	noteMessage.setText(IDEWorkbenchMessages.AutoSavePreferencPage_noteMessage);
	final GridData noteMessageData = new GridData(SWT.FILL, SWT.FILL, true, false);
	noteMessageData.widthHint = 350;
	noteMessage.setLayoutData(noteMessageData);
	}

	}