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

 /*******************************************************************************
  * Copyright (c) 2005, 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
  * 		Sebastian Davids <sdavids@gmx.de> - Fix for bug 19346 - Dialog font
  *   	should be activated and used by other components.
  *******************************************************************************/
 package org.eclipse.ui.internal.dialogs;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.window.Window;
 import org.eclipse.jface.wizard.WizardDialog;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 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.Shell;
 import org.eclipse.ui.IWorkingSet;
 import org.eclipse.ui.IWorkingSetManager;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.dialogs.IWorkingSetEditWizard;
 import org.eclipse.ui.dialogs.IWorkingSetNewWizard;
 import org.eclipse.ui.dialogs.IWorkingSetSelectionDialog;
 import org.eclipse.ui.dialogs.SelectionDialog;
 import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
 import org.eclipse.ui.internal.WorkbenchMessages;
 import org.eclipse.ui.internal.WorkbenchPlugin;
 import org.eclipse.ui.internal.WorkingSet;
 import org.eclipse.ui.internal.registry.WorkingSetRegistry;

 /**
  * Abstract baseclass for various working set dialogs.
  *
  * @since 3.2
  */
 public abstract class AbstractWorkingSetDialog extends SelectionDialog
 		implements IWorkingSetSelectionDialog {

 	private static final int ID_NEW = IDialogConstants.CLIENT_ID + 1;
 	private static final int ID_DETAILS = ID_NEW + 1;
 	private static final int ID_REMOVE = ID_DETAILS + 1;
 	private static final int ID_SELECTALL = ID_REMOVE + 1;
 	private static final int ID_DESELECTALL = ID_SELECTALL + 1;

 	private Button newButton;

 	private Button detailsButton;

 	private Button removeButton;

 	private Button selectAllButton;

 	private Button deselectAllButton;

 	private IWorkingSet[] result;

 	private List addedWorkingSets;

 	private List removedWorkingSets;

 	private Map editedWorkingSets;

 	private List removedMRUWorkingSets;

 	private Set workingSetIds;

 	private boolean canEdit;

 	protected AbstractWorkingSetDialog(Shell parentShell, String[] workingSetIds, boolean canEdit) {
 		super(parentShell);
 		if (workingSetIds != null) {
 			this.workingSetIds = new HashSet();
 			for (int i = 0; i < workingSetIds.length; i++) {
 				this.workingSetIds.add(workingSetIds[i]);
 			}
 		}
 		this.canEdit = canEdit;
 	}

 	/**
 	 * Return the set of supported working set types.
 	 *
 	 * @return the supported working set types
 	 */
 	protected Set getSupportedWorkingSetIds() {
 		return workingSetIds;
 	}

 	/**
 	 * Adds the modify buttons to the dialog.
 	 *
 	 * @param composite
 	 *            Composite to add the buttons to
 	 */
 	protected void addModifyButtons(Composite composite) {
 		Composite buttonComposite = new Composite(composite, SWT.RIGHT);
 		GridLayout layout = new GridLayout();
 		layout.marginHeight = layout.marginWidth = 0;
 		layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
 		buttonComposite.setLayout(layout);
 		GridData data = new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.GRAB_VERTICAL);
 		buttonComposite.setLayoutData(data);

 		newButton = createButton(buttonComposite, ID_NEW,
 				WorkbenchMessages.WorkingSetSelectionDialog_newButton_label,
 				false);
 		newButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				createWorkingSet();
 			}
 		});

 		if (canEdit) {
 			detailsButton = createButton(
 					buttonComposite,
 					ID_DETAILS,
 					WorkbenchMessages.WorkingSetSelectionDialog_detailsButton_label,
 					false);
 			detailsButton.setEnabled(false);
 			detailsButton.addSelectionListener(new SelectionAdapter() {
 				public void widgetSelected(SelectionEvent e) {
 					editSelectedWorkingSet();
 				}
 			});

 			removeButton = createButton(
 					buttonComposite,
 					ID_REMOVE,
 					WorkbenchMessages.WorkingSetSelectionDialog_removeButton_label,
 					false);
 			removeButton.setEnabled(false);
 			removeButton.addSelectionListener(new SelectionAdapter() {
 				public void widgetSelected(SelectionEvent e) {
 					removeSelectedWorkingSets();
 				}
 			});
 		}

 		layout.numColumns = 1; // must manually reset the number of columns because createButton increments it - we want these buttons to be laid out vertically.
 	}

 	/**
 	 * Add the select/deselect buttons.
 	 *
 	 * @param composite Composite to add the buttons to
 	 */
 	protected void addSelectionButtons(Composite composite) {
 		Composite buttonComposite = new Composite(composite, SWT.NONE);
 		GridLayout layout = new GridLayout(2, false);
 		layout.marginHeight = layout.marginWidth = 0;
 		layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
 		buttonComposite.setLayout(layout);
 		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 		buttonComposite.setLayoutData(data);

 		selectAllButton = createButton(
 				buttonComposite,
 				ID_SELECTALL,
 				WorkbenchMessages.SelectionDialog_selectLabel,
 				false);
 		selectAllButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				selectAllSets();
 			}
 		});

 		deselectAllButton = createButton(
 				buttonComposite,
 				ID_DESELECTALL,
 				WorkbenchMessages.SelectionDialog_deselectLabel,
 				false);
 		deselectAllButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				deselectAllSets();
 			}
 		});
 	}

 	/**
 	 * Select all working sets.
 	 */
 	protected abstract void selectAllSets();

 	/**
 	 * Deselect all working sets.
 	 */
 	protected abstract void deselectAllSets();

 	/**
 	 * Opens a working set wizard for editing the currently selected working
 	 * set.
 	 *
 	 * @see org.eclipse.ui.dialogs.IWorkingSetPage
 	 */
 	void editSelectedWorkingSet() {
 		IWorkingSetManager manager = WorkbenchPlugin.getDefault()
 				.getWorkingSetManager();
 		IWorkingSet editWorkingSet = (IWorkingSet) getSelectedWorkingSets()
 				.get(0);
 		IWorkingSetEditWizard wizard = manager
 				.createWorkingSetEditWizard(editWorkingSet);
 		WizardDialog dialog = new WizardDialog(getShell(), wizard);
 		IWorkingSet originalWorkingSet = (IWorkingSet) editedWorkingSets
 				.get(editWorkingSet);
 		boolean firstEdit = originalWorkingSet == null;

 		// save the original working set values for restoration when selection
 		// dialog is cancelled.
 		if (firstEdit) {
 			originalWorkingSet = new WorkingSet(editWorkingSet.getName(),
 					editWorkingSet.getLabel(), editWorkingSet.getElements());
 		} else {
 			editedWorkingSets.remove(editWorkingSet);
 		}
 		dialog.create();
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(dialog.getShell(),
 				IWorkbenchHelpContextIds.WORKING_SET_EDIT_WIZARD);
 		if (dialog.open() == Window.OK) {
 			editWorkingSet = wizard.getSelection();
 			availableWorkingSetsChanged();
 			// make sure ok button is enabled when the selected working set
 			// is edited. Fixes bug 33386.
 			updateButtonAvailability();
 		}
 		editedWorkingSets.put(editWorkingSet, originalWorkingSet);
 	}

 	/**
 	 * Opens a working set wizard for creating a new working set.
 	 */
 	void createWorkingSet() {
 		IWorkingSetManager manager = WorkbenchPlugin.getDefault()
 				.getWorkingSetManager();
 		String ids[] = null;
 		if (workingSetIds != null) {
 			ids = (String[]) workingSetIds.toArray(new String[workingSetIds
 					.size()]);
 		}
 		IWorkingSetNewWizard wizard = manager.createWorkingSetNewWizard(ids);
 		// the wizard can never be null since we have at least a resource
 		// working set
 		// creation page
 		WizardDialog dialog = new WizardDialog(getShell(), wizard);

 		dialog.create();
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(dialog.getShell(),
 				IWorkbenchHelpContextIds.WORKING_SET_NEW_WIZARD);
 		if (dialog.open() == Window.OK) {
 			IWorkingSet workingSet = wizard.getSelection();
 			manager.addWorkingSet(workingSet);
 			addedWorkingSets.add(workingSet);
 			availableWorkingSetsChanged();
 		}
 	}

 	protected abstract List getSelectedWorkingSets();

 	/**
 	 * Notifies the dialog that there has been a change to the sets available
 	 * for use. In other words, the user has either added, deleted or renamed a
 	 * set.
      * <p>
      * Subclasses should override, but should call <code>super.availableWorkingSetsChanged</code>
      * to update the selection button enablements.
      * </p>
 	 */
 	protected void availableWorkingSetsChanged() {
 		boolean enable = PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets().length > 0;
 		if (!(selectAllButton == null || selectAllButton.isDisposed())){
 			selectAllButton.setEnabled(enable);
 		}
 		if (!(deselectAllButton == null || deselectAllButton.isDisposed())){
 			deselectAllButton.setEnabled(enable);
 		}
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.dialogs.IWorkingSetSelectionDialog#getSelection()
 	 */
 	public IWorkingSet[] getSelection() {
 		return result;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.dialogs.IWorkingSetSelectionDialog#setSelection(org.eclipse.ui.IWorkingSet[])
 	 */
 	public void setSelection(IWorkingSet[] selection) {
 		result = selection;
 	}

 	/**
 	 * Overrides method in Dialog
 	 *
 	 * @see org.eclipse.jface.dialogs.Dialog#open()
 	 */
 	public int open() {
 		addedWorkingSets = new ArrayList();
 		removedWorkingSets = new ArrayList();
 		editedWorkingSets = new HashMap();
 		removedMRUWorkingSets = new ArrayList();
 		return super.open();
 	}

 	/**
 	 * Return the list of working sets that were added during the life of this
 	 * dialog.
 	 *
 	 * @return the working sets
 	 */
 	protected final List getAddedWorkingSets() {
 		return addedWorkingSets;
 	}

 	/**
 	 * Return the map of working sets that were edited during the life of this
 	 * dialog.
 	 *
 	 * @return the working sets
 	 */
 	protected final Map getEditedWorkingSets() {
 		return editedWorkingSets;
 	}

 	/**
 	 * Return the list of working sets that were removed from the MRU list
 	 * during the life of this dialog.
 	 *
 	 * @return the working sets
 	 */
 	protected final List getRemovedMRUWorkingSets() {
 		return removedMRUWorkingSets;
 	}

 	/**
 	 * Return the list of working sets that were removed during the life of this
 	 * dialog.
 	 *
 	 * @return the working sets
 	 */
 	protected final List getRemovedWorkingSets() {
 		return removedWorkingSets;
 	}

 	/**
 	 * Updates the modify buttons' enabled state based on the current seleciton.
 	 */
 	protected void updateButtonAvailability() {
 		List selection = getSelectedWorkingSets();
 		boolean hasSelection = selection != null && !selection.isEmpty();
 		boolean hasSingleSelection = hasSelection;
 		WorkingSetRegistry registry = WorkbenchPlugin.getDefault()
 				.getWorkingSetRegistry();

 		newButton.setEnabled(registry.hasNewPageWorkingSetDescriptor());

 		if (canEdit)
 			removeButton.setEnabled(hasSelection);

 		IWorkingSet selectedWorkingSet = null;
 		if (hasSelection) {
 			hasSingleSelection = selection.size() == 1;
 			if (hasSingleSelection) {
 				selectedWorkingSet = (IWorkingSet) selection
 						.get(0);
 			}
 		}
 		if (canEdit)
 			detailsButton.setEnabled(hasSingleSelection
 				&& selectedWorkingSet.isEditable());

 		getOkButton().setEnabled(true);
 	}

 	/**
 	 * Removes the selected working sets from the workbench.
 	 */
 	protected void removeSelectedWorkingSets() {
 		List selection = getSelectedWorkingSets();
 		removeSelectedWorkingSets(selection);
 	}

 	/**
 	 * Remove the working sets contained in the provided selection from the
 	 * working set manager.
 	 *
 	 * @param selection
 	 *            the sets
 	 */
 	protected void removeSelectedWorkingSets(List selection) {
 		IWorkingSetManager manager = WorkbenchPlugin.getDefault()
 				.getWorkingSetManager();
 		Iterator iter = selection.iterator();
 		while (iter.hasNext()) {
 			IWorkingSet workingSet = (IWorkingSet) iter.next();
 			if (getAddedWorkingSets().contains(workingSet)) {
 				getAddedWorkingSets().remove(workingSet);
 			} else {
 				IWorkingSet[] recentWorkingSets = manager
 						.getRecentWorkingSets();
 				for (int i = 0; i < recentWorkingSets.length; i++) {
 					if (workingSet.equals(recentWorkingSets[i])) {
 						getRemovedMRUWorkingSets().add(workingSet);
 						break;
 					}
 				}
 				getRemovedWorkingSets().add(workingSet);
 			}
 			manager.removeWorkingSet(workingSet);
 		}
 		availableWorkingSetsChanged();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 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
	* Sebastian Davids <sdavids@gmx.de> - Fix for bug 19346 - Dialog font
	* should be activated and used by other components.
	*******************************************************************************/
	package org.eclipse.ui.internal.dialogs;

	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.window.Window;
	import org.eclipse.jface.wizard.WizardDialog;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	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.Shell;
	import org.eclipse.ui.IWorkingSet;
	import org.eclipse.ui.IWorkingSetManager;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.dialogs.IWorkingSetEditWizard;
	import org.eclipse.ui.dialogs.IWorkingSetNewWizard;
	import org.eclipse.ui.dialogs.IWorkingSetSelectionDialog;
	import org.eclipse.ui.dialogs.SelectionDialog;
	import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
	import org.eclipse.ui.internal.WorkbenchMessages;
	import org.eclipse.ui.internal.WorkbenchPlugin;
	import org.eclipse.ui.internal.WorkingSet;
	import org.eclipse.ui.internal.registry.WorkingSetRegistry;

	/**
	* Abstract baseclass for various working set dialogs.
	*
	* @since 3.2
	*/
	public abstract class AbstractWorkingSetDialog extends SelectionDialog
	implements IWorkingSetSelectionDialog {

	private static final int ID_NEW = IDialogConstants.CLIENT_ID + 1;
	private static final int ID_DETAILS = ID_NEW + 1;
	private static final int ID_REMOVE = ID_DETAILS + 1;
	private static final int ID_SELECTALL = ID_REMOVE + 1;
	private static final int ID_DESELECTALL = ID_SELECTALL + 1;

	private Button newButton;

	private Button detailsButton;

	private Button removeButton;

	private Button selectAllButton;

	private Button deselectAllButton;

	private IWorkingSet[] result;

	private List addedWorkingSets;

	private List removedWorkingSets;

	private Map editedWorkingSets;

	private List removedMRUWorkingSets;

	private Set workingSetIds;

	private boolean canEdit;

	protected AbstractWorkingSetDialog(Shell parentShell, String[] workingSetIds, boolean canEdit) {
	super(parentShell);
	if (workingSetIds != null) {
	this.workingSetIds = new HashSet();
	for (int i = 0; i < workingSetIds.length; i++) {
	this.workingSetIds.add(workingSetIds[i]);
	}
	}
	this.canEdit = canEdit;
	}

	/**
	* Return the set of supported working set types.
	*
	* @return the supported working set types
	*/
	protected Set getSupportedWorkingSetIds() {
	return workingSetIds;
	}

	/**
	* Adds the modify buttons to the dialog.
	*
	* @param composite
	* Composite to add the buttons to
	*/
	protected void addModifyButtons(Composite composite) {
	Composite buttonComposite = new Composite(composite, SWT.RIGHT);
	GridLayout layout = new GridLayout();
	layout.marginHeight = layout.marginWidth = 0;
	layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	buttonComposite.setLayout(layout);
	GridData data = new GridData(GridData.VERTICAL_ALIGN_BEGINNING \| GridData.GRAB_VERTICAL);
	buttonComposite.setLayoutData(data);

	newButton = createButton(buttonComposite, ID_NEW,
	WorkbenchMessages.WorkingSetSelectionDialog_newButton_label,
	false);
	newButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	createWorkingSet();
	}
	});

	if (canEdit) {
	detailsButton = createButton(
	buttonComposite,
	ID_DETAILS,
	WorkbenchMessages.WorkingSetSelectionDialog_detailsButton_label,
	false);
	detailsButton.setEnabled(false);
	detailsButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	editSelectedWorkingSet();
	}
	});

	removeButton = createButton(
	buttonComposite,
	ID_REMOVE,
	WorkbenchMessages.WorkingSetSelectionDialog_removeButton_label,
	false);
	removeButton.setEnabled(false);
	removeButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	removeSelectedWorkingSets();
	}
	});
	}

	layout.numColumns = 1; // must manually reset the number of columns because createButton increments it - we want these buttons to be laid out vertically.
	}

	/**
	* Add the select/deselect buttons.
	*
	* @param composite Composite to add the buttons to
	*/
	protected void addSelectionButtons(Composite composite) {
	Composite buttonComposite = new Composite(composite, SWT.NONE);
	GridLayout layout = new GridLayout(2, false);
	layout.marginHeight = layout.marginWidth = 0;
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	buttonComposite.setLayout(layout);
	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
	buttonComposite.setLayoutData(data);

	selectAllButton = createButton(
	buttonComposite,
	ID_SELECTALL,
	WorkbenchMessages.SelectionDialog_selectLabel,
	false);
	selectAllButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	selectAllSets();
	}
	});

	deselectAllButton = createButton(
	buttonComposite,
	ID_DESELECTALL,
	WorkbenchMessages.SelectionDialog_deselectLabel,
	false);
	deselectAllButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	deselectAllSets();
	}
	});
	}

	/**
	* Select all working sets.
	*/
	protected abstract void selectAllSets();

	/**
	* Deselect all working sets.
	*/
	protected abstract void deselectAllSets();

	/**
	* Opens a working set wizard for editing the currently selected working
	* set.
	*
	* @see org.eclipse.ui.dialogs.IWorkingSetPage
	*/
	void editSelectedWorkingSet() {
	IWorkingSetManager manager = WorkbenchPlugin.getDefault()
	.getWorkingSetManager();
	IWorkingSet editWorkingSet = (IWorkingSet) getSelectedWorkingSets()
	.get(0);
	IWorkingSetEditWizard wizard = manager
	.createWorkingSetEditWizard(editWorkingSet);
	WizardDialog dialog = new WizardDialog(getShell(), wizard);
	IWorkingSet originalWorkingSet = (IWorkingSet) editedWorkingSets
	.get(editWorkingSet);
	boolean firstEdit = originalWorkingSet == null;

	// save the original working set values for restoration when selection
	// dialog is cancelled.
	if (firstEdit) {
	originalWorkingSet = new WorkingSet(editWorkingSet.getName(),
	editWorkingSet.getLabel(), editWorkingSet.getElements());
	} else {
	editedWorkingSets.remove(editWorkingSet);
	}
	dialog.create();
	PlatformUI.getWorkbench().getHelpSystem().setHelp(dialog.getShell(),
	IWorkbenchHelpContextIds.WORKING_SET_EDIT_WIZARD);
	if (dialog.open() == Window.OK) {
	editWorkingSet = wizard.getSelection();
	availableWorkingSetsChanged();
	// make sure ok button is enabled when the selected working set
	// is edited. Fixes bug 33386.
	updateButtonAvailability();
	}
	editedWorkingSets.put(editWorkingSet, originalWorkingSet);
	}

	/**
	* Opens a working set wizard for creating a new working set.
	*/
	void createWorkingSet() {
	IWorkingSetManager manager = WorkbenchPlugin.getDefault()
	.getWorkingSetManager();
	String ids[] = null;
	if (workingSetIds != null) {
	ids = (String[]) workingSetIds.toArray(new String[workingSetIds
	.size()]);
	}
	IWorkingSetNewWizard wizard = manager.createWorkingSetNewWizard(ids);
	// the wizard can never be null since we have at least a resource
	// working set
	// creation page
	WizardDialog dialog = new WizardDialog(getShell(), wizard);

	dialog.create();
	PlatformUI.getWorkbench().getHelpSystem().setHelp(dialog.getShell(),
	IWorkbenchHelpContextIds.WORKING_SET_NEW_WIZARD);
	if (dialog.open() == Window.OK) {
	IWorkingSet workingSet = wizard.getSelection();
	manager.addWorkingSet(workingSet);
	addedWorkingSets.add(workingSet);
	availableWorkingSetsChanged();
	}
	}

	protected abstract List getSelectedWorkingSets();

	/**
	* Notifies the dialog that there has been a change to the sets available
	* for use. In other words, the user has either added, deleted or renamed a
	* set.
	* <p>
	* Subclasses should override, but should call <code>super.availableWorkingSetsChanged</code>
	* to update the selection button enablements.
	* </p>
	*/
	protected void availableWorkingSetsChanged() {
	boolean enable = PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets().length > 0;
	if (!(selectAllButton == null \|\| selectAllButton.isDisposed())){
	selectAllButton.setEnabled(enable);
	}
	if (!(deselectAllButton == null \|\| deselectAllButton.isDisposed())){
	deselectAllButton.setEnabled(enable);
	}
	}

	/* (non-Javadoc)
	* @see org.eclipse.ui.dialogs.IWorkingSetSelectionDialog#getSelection()
	*/
	public IWorkingSet[] getSelection() {
	return result;
	}

	/* (non-Javadoc)
	* @see org.eclipse.ui.dialogs.IWorkingSetSelectionDialog#setSelection(org.eclipse.ui.IWorkingSet[])
	*/
	public void setSelection(IWorkingSet[] selection) {
	result = selection;
	}

	/**
	* Overrides method in Dialog
	*
	* @see org.eclipse.jface.dialogs.Dialog#open()
	*/
	public int open() {
	addedWorkingSets = new ArrayList();
	removedWorkingSets = new ArrayList();
	editedWorkingSets = new HashMap();
	removedMRUWorkingSets = new ArrayList();
	return super.open();
	}

	/**
	* Return the list of working sets that were added during the life of this
	* dialog.
	*
	* @return the working sets
	*/
	protected final List getAddedWorkingSets() {
	return addedWorkingSets;
	}

	/**
	* Return the map of working sets that were edited during the life of this
	* dialog.
	*
	* @return the working sets
	*/
	protected final Map getEditedWorkingSets() {
	return editedWorkingSets;
	}

	/**
	* Return the list of working sets that were removed from the MRU list
	* during the life of this dialog.
	*
	* @return the working sets
	*/
	protected final List getRemovedMRUWorkingSets() {
	return removedMRUWorkingSets;
	}

	/**
	* Return the list of working sets that were removed during the life of this
	* dialog.
	*
	* @return the working sets
	*/
	protected final List getRemovedWorkingSets() {
	return removedWorkingSets;
	}

	/**
	* Updates the modify buttons' enabled state based on the current seleciton.
	*/
	protected void updateButtonAvailability() {
	List selection = getSelectedWorkingSets();
	boolean hasSelection = selection != null && !selection.isEmpty();
	boolean hasSingleSelection = hasSelection;
	WorkingSetRegistry registry = WorkbenchPlugin.getDefault()
	.getWorkingSetRegistry();

	newButton.setEnabled(registry.hasNewPageWorkingSetDescriptor());

	if (canEdit)
	removeButton.setEnabled(hasSelection);

	IWorkingSet selectedWorkingSet = null;
	if (hasSelection) {
	hasSingleSelection = selection.size() == 1;
	if (hasSingleSelection) {
	selectedWorkingSet = (IWorkingSet) selection
	.get(0);
	}
	}
	if (canEdit)
	detailsButton.setEnabled(hasSingleSelection
	&& selectedWorkingSet.isEditable());

	getOkButton().setEnabled(true);
	}

	/**
	* Removes the selected working sets from the workbench.
	*/
	protected void removeSelectedWorkingSets() {
	List selection = getSelectedWorkingSets();
	removeSelectedWorkingSets(selection);
	}

	/**
	* Remove the working sets contained in the provided selection from the
	* working set manager.
	*
	* @param selection
	* the sets
	*/
	protected void removeSelectedWorkingSets(List selection) {
	IWorkingSetManager manager = WorkbenchPlugin.getDefault()
	.getWorkingSetManager();
	Iterator iter = selection.iterator();
	while (iter.hasNext()) {
	IWorkingSet workingSet = (IWorkingSet) iter.next();
	if (getAddedWorkingSets().contains(workingSet)) {
	getAddedWorkingSets().remove(workingSet);
	} else {
	IWorkingSet[] recentWorkingSets = manager
	.getRecentWorkingSets();
	for (int i = 0; i < recentWorkingSets.length; i++) {
	if (workingSet.equals(recentWorkingSets[i])) {
	getRemovedMRUWorkingSets().add(workingSet);
	break;
	}
	}
	getRemovedWorkingSets().add(workingSet);
	}
	manager.removeWorkingSet(workingSet);
	}
	availableWorkingSetsChanged();
	}
	}