containers/org.eclipse.linuxtools.docker.ui/src/org/eclipse/linuxtools/internal/docker/ui/preferences/DockerRegistryAccountPreferencePage.java - linuxtools/org.eclipse.linuxtools - Git at Google

 /*******************************************************************************
  * Copyright (c) 2016 Red Hat.
  * 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:
  *     Red Hat - Initial Contribution
  *******************************************************************************/
 package org.eclipse.linuxtools.internal.docker.ui.preferences;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.viewers.ILabelProviderListener;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.TableLayout;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jface.window.Window;
 import org.eclipse.linuxtools.docker.core.IRegistryAccount;
 import org.eclipse.linuxtools.internal.docker.core.RegistryAccountManager;
 import org.eclipse.linuxtools.internal.docker.ui.wizards.RegistryAccountDialog;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Image;
 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.Event;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;

 /**
  * @since 2.0
  */
 public class DockerRegistryAccountPreferencePage extends PreferencePage
 		implements IWorkbenchPreferencePage, Listener {

 	/**
 	 * @since 2.1
 	 */
 	public static final String ACCOUNT_PREFERENCE_PAGE_ID = "org.eclipse.linuxtools.docker.ui.preferences.DockerRegistryAccountPreferencePage"; //$NON-NLS-1$

 	/**
 	 * Inner class to keep track of password modifications (without committing
 	 * them to the keyring) while the user modifies the preferences.
 	 */
 	protected class PasswordModification {
 		protected static final int ADD = 1;
 		protected static final int DELETE = 2;

 		protected int changeFlag;
 		protected IRegistryAccount info;

 		protected PasswordModification(int changeFlag,
 				IRegistryAccount info) {
 			this.changeFlag = changeFlag;
 			this.info = info;
 		}
 	}

 	private final class PasswordContentProvider
 			implements IStructuredContentProvider, ITableLabelProvider {

 		/**
 		 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(Object)
 		 */
 		@Override
 		public Object[] getElements(Object inputElement) {
 			return passwords.toArray();
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
 		 */
 		@Override
 		public void dispose() {
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(Viewer,
 		 *      Object, Object)
 		 */
 		@Override
 		public void inputChanged(Viewer viewer, Object oldInput,
 				Object newInput) {
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(Object,
 		 *      int)
 		 */
 		@Override
 		public Image getColumnImage(Object element, int columnIndex) {
 			return null;
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(Object,
 		 *      int)
 		 */
 		@Override
 		public String getColumnText(Object element, int columnIndex) {
 			if (element instanceof IRegistryAccount) {
 				IRegistryAccount info = (IRegistryAccount) element;
 				switch (columnIndex) {
 				case 0:
 					return info.getServerAddress();
 				case 1:
 					return info.getUsername();
 				case 2:
 					return info.getEmail();
 				}
 			}

 			// Should never get here
 			return null;
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(ILabelProviderListener)
 		 */
 		@Override
 		public void addListener(ILabelProviderListener listener) {
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(Object,
 		 *      String)
 		 */
 		@Override
 		public boolean isLabelProperty(Object element, String property) {
 			return false;
 		}

 		/**
 		 * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(ILabelProviderListener)
 		 */
 		@Override
 		public void removeListener(ILabelProviderListener listener) {
 		}

 	}

 	public DockerRegistryAccountPreferencePage() {
 		noDefaultAndApplyButton();
 		provider = new PasswordContentProvider();
 		modifications = new ArrayList<>();
 	}

 	public DockerRegistryAccountPreferencePage(String title) {
 		super(title);
 	}

 	public DockerRegistryAccountPreferencePage(String title,
 			ImageDescriptor image) {
 		super(title, image);
 	}

 	// SWT Widgets and content providers
 	private Table pwdTable;
 	private TableViewer pwdTableViewer;
 	private PasswordContentProvider provider;
 	private Button addButton, changeButton, removeButton;

 	// List of information for table
 	private List<IRegistryAccount> passwords;

 	// List to keep track of additions / deletions / changes. We need to
 	// keep track of these until the user decides whether to cancel the
 	// preference
 	// page (and we forget about the changes) or press ok (and we commit the
 	// changes)
 	private List<PasswordModification> modifications;

 	/**
 	 * @see org.eclipse.jface.preference.PreferencePage#createContents(Composite)
 	 */
 	@Override
 	protected Control createContents(Composite parent) {

 		Composite page = createComposite(parent, 1, 2, false, null, -1, -1, GridData.FILL);
 		GridData gd = (GridData) page.getLayoutData();
 		gd.grabExcessHorizontalSpace = true;
 		gd.grabExcessVerticalSpace = true;

 		// SystemWidgetHelpers.createLabel(page,
 		// SystemResources.RESID_PREF_SIGNON_DESCRIPTION, 2);

 		// Password table
 		pwdTable = new Table(page, SWT.FULL_SELECTION | SWT.MULTI | SWT.V_SCROLL
 				| SWT.H_SCROLL | SWT.BORDER);
 		pwdTable.setLinesVisible(true);
 		pwdTable.setHeaderVisible(true);
 		pwdTable.addListener(SWT.Selection, this);

 		TableLayout tableLayout = new TableLayout();
 		tableLayout.addColumnData(new ColumnWeightData(100, true));
 		tableLayout.addColumnData(new ColumnWeightData(100, true));
 		tableLayout.addColumnData(new ColumnWeightData(100, true));
 		pwdTable.setLayout(tableLayout);

 		gd = new GridData(GridData.FILL_BOTH);
 		gd.grabExcessHorizontalSpace = true;
 		gd.grabExcessVerticalSpace = true;

 		pwdTable.setLayoutData(gd);

 		// Server Address column
 		TableColumn hostnameColumn = new TableColumn(pwdTable, SWT.NONE);
 		hostnameColumn
 				.setText("Server Address");

 		// Username column
 		TableColumn sysTypeColumn = new TableColumn(pwdTable, SWT.NONE);
 		sysTypeColumn.setText("Username");

 		// Email column
 		TableColumn useridColumn = new TableColumn(pwdTable, SWT.NONE);
 		useridColumn.setText("Email");

 		pwdTableViewer = new TableViewer(pwdTable);
 		pwdTableViewer.setContentProvider(provider);
 		pwdTableViewer.setLabelProvider(provider);
 		pwdTableViewer.setInput(passwords);

 		// Create the Button bar for add, change and remove
 		Composite buttonBar = createComposite(page, 1, 1, false, null, -1, -1, GridData.FILL);
 		gd = (GridData) buttonBar.getLayoutData();
 		gd.grabExcessHorizontalSpace = false;
 		gd.grabExcessVerticalSpace = true;

 		addButton = createPushButton(buttonBar, this,
 				"Add",
 				"Add a new Docker registry account.");
 		changeButton = createPushButton(buttonBar, this,
 				"Edit",
 				"Edit an existing Docker registry account.");
 		removeButton = createPushButton(buttonBar, this,
 				"Remove",
 				"Remove an existing Docker registry account.");

 		changeButton.setEnabled(false);
 		removeButton.setEnabled(false);
 		return parent;
 	}

 	/**
 	 * @see org.eclipse.ui.IWorkbenchPreferencePage#init(IWorkbench)
 	 */
 	@Override
 	public void init(IWorkbench workbench) {
 		// get a local copy of the accounts
 		passwords = new ArrayList<>(
 				RegistryAccountManager.getInstance().getAccounts());

 		// refresh password table
 		if (pwdTableViewer != null) {
 			pwdTableViewer.refresh();
 		}
 	}

 	/**
 	 * @see org.eclipse.swt.widgets.Listener#handleEvent(Event)
 	 */
 	@Override
 	public void handleEvent(Event event) {
 		if (event.type == SWT.Selection) {
 			if (event.widget == addButton) {
 				RegistryAccountDialog dialog = new RegistryAccountDialog(
 						getShell(),
 						"New Registry Account");
 				if (dialog.open() == Window.OK) {
 					IRegistryAccount info = dialog
 							.getSignonInformation();
 					passwords.add(info);
 					modifications.add(new PasswordModification(
 							PasswordModification.ADD, info));

 					pwdTableViewer.refresh();
 					pwdTable.select(passwords.size() - 1); // select the new
 															// entry
 				}

 			} else if (event.widget == changeButton) {
 				RegistryAccountDialog dialog = new RegistryAccountDialog(
 						getShell(),
 						"Edit Registry Account");
 				int index = pwdTable.getSelectionIndex();
 				IRegistryAccount info = passwords
 						.get(index);
 				dialog.setInputData(info);
 				if (dialog.open() == Window.OK) {
 					// Remove old and add new
 					info = dialog.getSignonInformation();
 					IRegistryAccount oldInfo = passwords
 							.remove(index);
 					passwords.add(index, info);

 					modifications.add(new PasswordModification(
 							PasswordModification.DELETE, oldInfo));
 					modifications.add(new PasswordModification(
 							PasswordModification.ADD, info));

 					pwdTableViewer.refresh();
 					pwdTable.select(index);
 				}

 			} else if (event.widget == removeButton) {
 				int[] indicies = pwdTable.getSelectionIndices();
 				for (int idx = indicies.length - 1; idx >= 0; idx--) {
 					RegistryAccountManager.getInstance()
 							.remove(passwords.get(indicies[idx]));
 					modifications.add(new PasswordModification(
 							PasswordModification.DELETE,
 							passwords
 									.remove(indicies[idx])));
 				}

 				pwdTableViewer.refresh();
 			}

 			// Update table buttons based on changes
 			switch (pwdTable.getSelectionCount()) {
 			case 0:
 				changeButton.setEnabled(false);
 				removeButton.setEnabled(false);
 				break;

 			case 1:
 				changeButton.setEnabled(true);
 				removeButton.setEnabled(true);
 				break;

 			default:
 				changeButton.setEnabled(false);
 				removeButton.setEnabled(true);
 				break;
 			}
 		}
 	}

 	/**
 	 * @see org.eclipse.jface.preference.IPreferencePage#performOk()
 	 */
 	@Override
 	public boolean performOk() {

 		if (modifications.size() > 0) {
 			PasswordModification mod;
 			RegistryAccountManager manager = RegistryAccountManager
 					.getInstance();

 			for (int i = 0; i < modifications.size(); i++) {
 				mod = modifications.get(i);

 				if (mod.changeFlag == PasswordModification.ADD) {
 					manager.add(mod.info);
 				} else if (mod.changeFlag == PasswordModification.DELETE) {
 					manager.remove(mod.info);
 				}
 			}

 			modifications.clear();
 		}

 		return super.performOk();
 	}

 	/**
 	 * @see org.eclipse.jface.preference.IPreferencePage#performCancel()
 	 */
 	@Override
 	public boolean performCancel() {
 		modifications.clear();
 		return super.performCancel();
 	}

 	private static Composite createComposite(Composite parent, int parentSpan, int numColumns, boolean border, String label, int marginSize, int spacingSize, int verticalAlignment) {
 		//border = true;
 		boolean borderNeeded = border;
 		if (label != null)
 			borderNeeded = true; // force the case
 		int style = SWT.NULL;
 		if (borderNeeded)
 			style |= SWT.SHADOW_ETCHED_IN;
 		Composite composite = null;
 		if (borderNeeded) {
 			composite = new Group(parent, style);
 			if (label != null)
 				 ((Group) composite).setText(label);
 		} else {
 			composite = new Composite(parent, style);
 		}
 		//GridLayout
 		GridLayout layout = new GridLayout();
 		layout.numColumns = numColumns;
 		if (marginSize != -1) {
 			layout.marginWidth = 0;
 			layout.marginHeight = 0;
 		}
 		if (spacingSize != -1) {
 			layout.horizontalSpacing = 0;
 			layout.verticalSpacing = 0;
 		}
 		composite.setLayout(layout);
 		//GridData
 		GridData data = new GridData();
 		data.horizontalSpan = parentSpan;
 		data.horizontalAlignment = GridData.FILL;
 		data.grabExcessHorizontalSpace = true;

 		data.verticalAlignment = verticalAlignment;
 		data.grabExcessVerticalSpace = false;

 		composite.setLayoutData(data);
 		return composite;
 	}

 	public static Button createPushButton(Composite group, Listener listener, String label, String tooltip) {
 		Button button = new Button(group, SWT.PUSH);
 		button.setText(label);
 		if (listener != null)
 			button.addListener(SWT.Selection, listener);
 		GridData data = new GridData();
 		data.horizontalAlignment = GridData.FILL;
 		data.grabExcessHorizontalSpace = true;
 		button.setLayoutData(data);
 		if (tooltip != null)
 			button.setToolTipText(tooltip);
 		return button;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2016 Red Hat.
	* 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:
	* Red Hat - Initial Contribution
	*******************************************************************************/
	package org.eclipse.linuxtools.internal.docker.ui.preferences;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.viewers.ILabelProviderListener;
	import org.eclipse.jface.viewers.IStructuredContentProvider;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.TableLayout;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.jface.window.Window;
	import org.eclipse.linuxtools.docker.core.IRegistryAccount;
	import org.eclipse.linuxtools.internal.docker.core.RegistryAccountManager;
	import org.eclipse.linuxtools.internal.docker.ui.wizards.RegistryAccountDialog;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Image;
	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.Event;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPreferencePage;

	/**
	* @since 2.0
	*/
	public class DockerRegistryAccountPreferencePage extends PreferencePage
	implements IWorkbenchPreferencePage, Listener {

	/**
	* @since 2.1
	*/
	public static final String ACCOUNT_PREFERENCE_PAGE_ID = "org.eclipse.linuxtools.docker.ui.preferences.DockerRegistryAccountPreferencePage"; //$NON-NLS-1$

	/**
	* Inner class to keep track of password modifications (without committing
	* them to the keyring) while the user modifies the preferences.
	*/
	protected class PasswordModification {
	protected static final int ADD = 1;
	protected static final int DELETE = 2;

	protected int changeFlag;
	protected IRegistryAccount info;

	protected PasswordModification(int changeFlag,
	IRegistryAccount info) {
	this.changeFlag = changeFlag;
	this.info = info;
	}
	}

	private final class PasswordContentProvider
	implements IStructuredContentProvider, ITableLabelProvider {

	/**
	* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(Object)
	*/
	@Override
	public Object[] getElements(Object inputElement) {
	return passwords.toArray();
	}

	/**
	* @see org.eclipse.jface.viewers.IContentProvider#dispose()
	*/
	@Override
	public void dispose() {
	}

	/**
	* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(Viewer,
	* Object, Object)
	*/
	@Override
	public void inputChanged(Viewer viewer, Object oldInput,
	Object newInput) {
	}

	/**
	* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(Object,
	* int)
	*/
	@Override
	public Image getColumnImage(Object element, int columnIndex) {
	return null;
	}

	/**
	* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(Object,
	* int)
	*/
	@Override
	public String getColumnText(Object element, int columnIndex) {
	if (element instanceof IRegistryAccount) {
	IRegistryAccount info = (IRegistryAccount) element;
	switch (columnIndex) {
	case 0:
	return info.getServerAddress();
	case 1:
	return info.getUsername();
	case 2:
	return info.getEmail();
	}
	}

	// Should never get here
	return null;
	}

	/**
	* @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(ILabelProviderListener)
	*/
	@Override
	public void addListener(ILabelProviderListener listener) {
	}

	/**
	* @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(Object,
	* String)
	*/
	@Override
	public boolean isLabelProperty(Object element, String property) {
	return false;
	}

	/**
	* @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(ILabelProviderListener)
	*/
	@Override
	public void removeListener(ILabelProviderListener listener) {
	}

	}

	public DockerRegistryAccountPreferencePage() {
	noDefaultAndApplyButton();
	provider = new PasswordContentProvider();
	modifications = new ArrayList<>();
	}

	public DockerRegistryAccountPreferencePage(String title) {
	super(title);
	}

	public DockerRegistryAccountPreferencePage(String title,
	ImageDescriptor image) {
	super(title, image);
	}

	// SWT Widgets and content providers
	private Table pwdTable;
	private TableViewer pwdTableViewer;
	private PasswordContentProvider provider;
	private Button addButton, changeButton, removeButton;

	// List of information for table
	private List<IRegistryAccount> passwords;

	// List to keep track of additions / deletions / changes. We need to
	// keep track of these until the user decides whether to cancel the
	// preference
	// page (and we forget about the changes) or press ok (and we commit the
	// changes)
	private List<PasswordModification> modifications;

	/**
	* @see org.eclipse.jface.preference.PreferencePage#createContents(Composite)
	*/
	@Override
	protected Control createContents(Composite parent) {

	Composite page = createComposite(parent, 1, 2, false, null, -1, -1, GridData.FILL);
	GridData gd = (GridData) page.getLayoutData();
	gd.grabExcessHorizontalSpace = true;
	gd.grabExcessVerticalSpace = true;

	// SystemWidgetHelpers.createLabel(page,
	// SystemResources.RESID_PREF_SIGNON_DESCRIPTION, 2);

	// Password table
	pwdTable = new Table(page, SWT.FULL_SELECTION \| SWT.MULTI \| SWT.V_SCROLL
	\| SWT.H_SCROLL \| SWT.BORDER);
	pwdTable.setLinesVisible(true);
	pwdTable.setHeaderVisible(true);
	pwdTable.addListener(SWT.Selection, this);

	TableLayout tableLayout = new TableLayout();
	tableLayout.addColumnData(new ColumnWeightData(100, true));
	tableLayout.addColumnData(new ColumnWeightData(100, true));
	tableLayout.addColumnData(new ColumnWeightData(100, true));
	pwdTable.setLayout(tableLayout);

	gd = new GridData(GridData.FILL_BOTH);
	gd.grabExcessHorizontalSpace = true;
	gd.grabExcessVerticalSpace = true;

	pwdTable.setLayoutData(gd);

	// Server Address column
	TableColumn hostnameColumn = new TableColumn(pwdTable, SWT.NONE);
	hostnameColumn
	.setText("Server Address");

	// Username column
	TableColumn sysTypeColumn = new TableColumn(pwdTable, SWT.NONE);
	sysTypeColumn.setText("Username");

	// Email column
	TableColumn useridColumn = new TableColumn(pwdTable, SWT.NONE);
	useridColumn.setText("Email");

	pwdTableViewer = new TableViewer(pwdTable);
	pwdTableViewer.setContentProvider(provider);
	pwdTableViewer.setLabelProvider(provider);
	pwdTableViewer.setInput(passwords);

	// Create the Button bar for add, change and remove
	Composite buttonBar = createComposite(page, 1, 1, false, null, -1, -1, GridData.FILL);
	gd = (GridData) buttonBar.getLayoutData();
	gd.grabExcessHorizontalSpace = false;
	gd.grabExcessVerticalSpace = true;

	addButton = createPushButton(buttonBar, this,
	"Add",
	"Add a new Docker registry account.");
	changeButton = createPushButton(buttonBar, this,
	"Edit",
	"Edit an existing Docker registry account.");
	removeButton = createPushButton(buttonBar, this,
	"Remove",
	"Remove an existing Docker registry account.");

	changeButton.setEnabled(false);
	removeButton.setEnabled(false);
	return parent;
	}

	/**
	* @see org.eclipse.ui.IWorkbenchPreferencePage#init(IWorkbench)
	*/
	@Override
	public void init(IWorkbench workbench) {
	// get a local copy of the accounts
	passwords = new ArrayList<>(
	RegistryAccountManager.getInstance().getAccounts());

	// refresh password table
	if (pwdTableViewer != null) {
	pwdTableViewer.refresh();
	}
	}

	/**
	* @see org.eclipse.swt.widgets.Listener#handleEvent(Event)
	*/
	@Override
	public void handleEvent(Event event) {
	if (event.type == SWT.Selection) {
	if (event.widget == addButton) {
	RegistryAccountDialog dialog = new RegistryAccountDialog(
	getShell(),
	"New Registry Account");
	if (dialog.open() == Window.OK) {
	IRegistryAccount info = dialog
	.getSignonInformation();
	passwords.add(info);
	modifications.add(new PasswordModification(
	PasswordModification.ADD, info));

	pwdTableViewer.refresh();
	pwdTable.select(passwords.size() - 1); // select the new
	// entry
	}

	} else if (event.widget == changeButton) {
	RegistryAccountDialog dialog = new RegistryAccountDialog(
	getShell(),
	"Edit Registry Account");
	int index = pwdTable.getSelectionIndex();
	IRegistryAccount info = passwords
	.get(index);
	dialog.setInputData(info);
	if (dialog.open() == Window.OK) {
	// Remove old and add new
	info = dialog.getSignonInformation();
	IRegistryAccount oldInfo = passwords
	.remove(index);
	passwords.add(index, info);

	modifications.add(new PasswordModification(
	PasswordModification.DELETE, oldInfo));
	modifications.add(new PasswordModification(
	PasswordModification.ADD, info));

	pwdTableViewer.refresh();
	pwdTable.select(index);
	}

	} else if (event.widget == removeButton) {
	int[] indicies = pwdTable.getSelectionIndices();
	for (int idx = indicies.length - 1; idx >= 0; idx--) {
	RegistryAccountManager.getInstance()
	.remove(passwords.get(indicies[idx]));
	modifications.add(new PasswordModification(
	PasswordModification.DELETE,
	passwords
	.remove(indicies[idx])));
	}

	pwdTableViewer.refresh();
	}

	// Update table buttons based on changes
	switch (pwdTable.getSelectionCount()) {
	case 0:
	changeButton.setEnabled(false);
	removeButton.setEnabled(false);
	break;

	case 1:
	changeButton.setEnabled(true);
	removeButton.setEnabled(true);
	break;

	default:
	changeButton.setEnabled(false);
	removeButton.setEnabled(true);
	break;
	}
	}
	}

	/**
	* @see org.eclipse.jface.preference.IPreferencePage#performOk()
	*/
	@Override
	public boolean performOk() {

	if (modifications.size() > 0) {
	PasswordModification mod;
	RegistryAccountManager manager = RegistryAccountManager
	.getInstance();

	for (int i = 0; i < modifications.size(); i++) {
	mod = modifications.get(i);

	if (mod.changeFlag == PasswordModification.ADD) {
	manager.add(mod.info);
	} else if (mod.changeFlag == PasswordModification.DELETE) {
	manager.remove(mod.info);
	}
	}

	modifications.clear();
	}

	return super.performOk();
	}

	/**
	* @see org.eclipse.jface.preference.IPreferencePage#performCancel()
	*/
	@Override
	public boolean performCancel() {
	modifications.clear();
	return super.performCancel();
	}

	private static Composite createComposite(Composite parent, int parentSpan, int numColumns, boolean border, String label, int marginSize, int spacingSize, int verticalAlignment) {
	//border = true;
	boolean borderNeeded = border;
	if (label != null)
	borderNeeded = true; // force the case
	int style = SWT.NULL;
	if (borderNeeded)
	style \|= SWT.SHADOW_ETCHED_IN;
	Composite composite = null;
	if (borderNeeded) {
	composite = new Group(parent, style);
	if (label != null)
	((Group) composite).setText(label);
	} else {
	composite = new Composite(parent, style);
	}
	//GridLayout
	GridLayout layout = new GridLayout();
	layout.numColumns = numColumns;
	if (marginSize != -1) {
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	}
	if (spacingSize != -1) {
	layout.horizontalSpacing = 0;
	layout.verticalSpacing = 0;
	}
	composite.setLayout(layout);
	//GridData
	GridData data = new GridData();
	data.horizontalSpan = parentSpan;
	data.horizontalAlignment = GridData.FILL;
	data.grabExcessHorizontalSpace = true;

	data.verticalAlignment = verticalAlignment;
	data.grabExcessVerticalSpace = false;

	composite.setLayoutData(data);
	return composite;
	}

	public static Button createPushButton(Composite group, Listener listener, String label, String tooltip) {
	Button button = new Button(group, SWT.PUSH);
	button.setText(label);
	if (listener != null)
	button.addListener(SWT.Selection, listener);
	GridData data = new GridData();
	data.horizontalAlignment = GridData.FILL;
	data.grabExcessHorizontalSpace = true;
	button.setLayoutData(data);
	if (tooltip != null)
	button.setToolTipText(tooltip);
	return button;
	}

	}