org.eclipse.ltk.ui.refactoring/src/org/eclipse/ltk/internal/ui/refactoring/history/BrowseRefactoringHistoryControl.java - jdt/eclipse.jdt.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
  *******************************************************************************/
 package org.eclipse.ltk.internal.ui.refactoring.history;

 import org.eclipse.core.runtime.Assert;

 import org.eclipse.ltk.core.refactoring.RefactoringDescriptorProxy;
 import org.eclipse.ltk.core.refactoring.history.RefactoringHistory;

 import org.eclipse.ltk.internal.ui.refactoring.RefactoringPluginImages;
 import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIMessages;
 import org.eclipse.ltk.internal.ui.refactoring.util.PixelConverter;
 import org.eclipse.ltk.internal.ui.refactoring.util.SWTUtil;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.ViewForm;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
 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.ToolBar;

 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.action.Separator;
 import org.eclipse.jface.action.ToolBarManager;
 import org.eclipse.jface.viewers.IContentProvider;
 import org.eclipse.jface.viewers.TreeViewer;

 import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryContentProvider;
 import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryControlConfiguration;
 import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryLabelProvider;

 /**
  * Control which is capable of selecting elements of a refactoring history. The
  * refactoring history can be sorted by project or by timestamps.
  * <p>
  * This control expects a control configuration with a checkable tree viewer.
  * </p>
  *
  * @since 3.2
  */
 public class BrowseRefactoringHistoryControl extends RefactoringHistoryControl {

 	/** The empty descriptors constant */
 	private static final RefactoringDescriptorProxy[] EMPTY_DESCRIPTORS= {};

 	/** The toolbar sort group */
 	private static final String TOOLBAR_SORT_GROUP= "group.sort"; //$NON-NLS-1$

 	/** The deselect all button, or <code>null</code> */
 	private Button fDeselectAllButton= null;

 	/** The select all button, or <code>null</code> */
 	private Button fSelectAllButton= null;

 	/** The sort projects action */
 	private final IAction fSortProjects= new Action(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project, IAction.AS_RADIO_BUTTON) {

 		public final void run() {
 			final BrowseRefactoringHistoryContentProvider provider= (BrowseRefactoringHistoryContentProvider) fHistoryViewer.getContentProvider();
 			provider.setSortProjects(true);
 			fHistoryViewer.setSorter(fViewerSorter);
 			fHistoryViewer.refresh(false);
 			setExpandedState();
 			reconcileCheckState();
 			fSortProjects.setChecked(true);
 			fSortTimestamps.setChecked(false);
 		}
 	};

 	/** The sort time stamps action */
 	private final IAction fSortTimestamps= new Action(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date, IAction.AS_RADIO_BUTTON) {

 		public final void run() {
 			final BrowseRefactoringHistoryContentProvider provider= (BrowseRefactoringHistoryContentProvider) fHistoryViewer.getContentProvider();
 			provider.setSortProjects(false);
 			fHistoryViewer.setSorter(null);
 			fHistoryViewer.refresh(false);
 			setExpandedState();
 			reconcileCheckState();
 			fSortTimestamps.setChecked(true);
 			fSortProjects.setChecked(false);
 		}
 	};

 	/** The toolbar manager, or <code>null</code> */
 	private ToolBarManager fToolBarManager= null;

 	/** The viewer sorter */
 	private final BrowseRefactoringHistoryViewerSorter fViewerSorter= new BrowseRefactoringHistoryViewerSorter();

 	/**
 	 * Creates a new browse refactoring history control.
 	 *
 	 * @param parent
 	 *            the parent control
 	 * @param configuration
 	 *            the refactoring history control configuration to use
 	 */
 	public BrowseRefactoringHistoryControl(final Composite parent, final RefactoringHistoryControlConfiguration configuration) {
 		super(parent, configuration);

 		addDisposeListener(new DisposeListener() {

 			public final void widgetDisposed(final DisposeEvent event) {
 				if (fToolBarManager != null) {
 					fToolBarManager.removeAll();
 					fToolBarManager.dispose();
 					fToolBarManager= null;
 				}
 			}
 		});
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected void createBottomButtonBar(final Composite parent) {
 		Assert.isNotNull(parent);
 		final Composite composite= new Composite(parent, SWT.NONE);
 		final GridLayout layout= new GridLayout(2, false);
 		layout.marginWidth= 0;
 		layout.marginHeight= 0;
 		layout.marginTop= 5;
 		composite.setLayout(layout);

 		final GridData data= new GridData();
 		data.grabExcessHorizontalSpace= true;
 		data.grabExcessVerticalSpace= false;
 		data.horizontalAlignment= SWT.FILL;
 		data.verticalAlignment= SWT.TOP;
 		composite.setLayoutData(data);

 		createSelectAllButton(composite);
 		createDeselectAllButton(composite);
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	public void createControl() {
 		super.createControl();
 		final GridData data= new GridData();
 		data.grabExcessHorizontalSpace= true;
 		data.heightHint= new PixelConverter(this).convertHeightInCharsToPixels(22);
 		data.horizontalAlignment= SWT.FILL;
 		data.verticalAlignment= SWT.FILL;
 		setLayoutData(data);
 	}

 	/**
 	 * Creates the deselect all button of the control.
 	 *
 	 * @param parent
 	 *            the parent composite
 	 */
 	protected void createDeselectAllButton(final Composite parent) {
 		Assert.isNotNull(parent);
 		fDeselectAllButton= new Button(parent, SWT.NONE);
 		fDeselectAllButton.setEnabled(false);
 		fDeselectAllButton.setText(RefactoringUIMessages.SelectRefactoringHistoryControl_deselect_all_label);
 		final GridData data= new GridData();
 		data.horizontalAlignment= GridData.END;
 		data.verticalAlignment= GridData.BEGINNING;
 		data.widthHint= SWTUtil.getButtonWidthHint(fDeselectAllButton);
 		fDeselectAllButton.setLayoutData(data);

 		fDeselectAllButton.addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				handleDeselectAll();
 			}
 		});
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected TreeViewer createHistoryViewer(final Composite parent) {
 		Assert.isNotNull(parent);
 		TreeViewer viewer= null;
 		if (fControlConfiguration.isCheckableViewer())
 			viewer= new RefactoringHistoryTreeViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI);
 		else
 			viewer= new TreeViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI);
 		return viewer;
 	}

 	/**
 	 * Creates the select all button of the control.
 	 *
 	 * @param parent
 	 *            the parent composite
 	 */
 	protected void createSelectAllButton(final Composite parent) {
 		Assert.isNotNull(parent);
 		fSelectAllButton= new Button(parent, SWT.NONE);
 		fSelectAllButton.setEnabled(false);
 		fSelectAllButton.setText(RefactoringUIMessages.SelectRefactoringHistoryControl_select_all_label);
 		final GridData data= new GridData();
 		data.horizontalAlignment= GridData.END;
 		data.grabExcessHorizontalSpace= true;
 		data.verticalAlignment= GridData.BEGINNING;
 		data.widthHint= SWTUtil.getButtonWidthHint(fSelectAllButton);
 		fSelectAllButton.setLayoutData(data);

 		fSelectAllButton.addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				handleSelectAll();
 			}
 		});
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected void createToolBar(final ViewForm parent) {
 		final ToolBarManager manager= getToolBarManager();
 		if (manager != null) {
 			manager.removeAll();
 			manager.add(new Separator(TOOLBAR_SORT_GROUP));
 			fSortProjects.setText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project);
 			fSortProjects.setToolTipText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project);
 			fSortProjects.setDescription(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project_description);
 			fSortProjects.setImageDescriptor(RefactoringPluginImages.DESC_ELCL_SORT_PROJECT);
 			fSortProjects.setDisabledImageDescriptor(RefactoringPluginImages.DESC_DLCL_SORT_PROJECT);
 			fSortTimestamps.setText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date);
 			fSortTimestamps.setToolTipText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date);
 			fSortTimestamps.setDescription(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date_description);
 			fSortTimestamps.setImageDescriptor(RefactoringPluginImages.DESC_ELCL_SORT_DATE);
 			fSortTimestamps.setDisabledImageDescriptor(RefactoringPluginImages.DESC_DLCL_SORT_DATE);
 			manager.appendToGroup(TOOLBAR_SORT_GROUP, fSortProjects);
 			manager.appendToGroup(TOOLBAR_SORT_GROUP, fSortTimestamps);
 			manager.update(true);
 		}
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected int getContainerColumns() {
 		return 1;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected RefactoringHistoryContentProvider getContentProvider() {
 		return new BrowseRefactoringHistoryContentProvider(fControlConfiguration);
 	}

 	/**
 	 * Returns the deselect all button.
 	 *
 	 * @return the deselect all button, or <code>null</code>
 	 */
 	public Button getDeselectAllButton() {
 		return fDeselectAllButton;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected RefactoringHistoryLabelProvider getLabelProvider() {
 		return new BrowseRefactoringHistoryLabelProvider(fControlConfiguration);
 	}

 	/**
 	 * Returns the select all button.
 	 *
 	 * @return the select all button, or <code>null</code>
 	 */
 	public Button getSelectAllButton() {
 		return fSelectAllButton;
 	}

 	/**
 	 * Returns the toolbar manager of this control
 	 *
 	 * @return the toolbar manager
 	 */
 	protected ToolBarManager getToolBarManager() {
 		if (fToolBarManager == null) {
 			final ToolBar toolbar= new ToolBar(fHistoryPane, SWT.FLAT);
 			fHistoryPane.setTopCenter(toolbar);
 			fToolBarManager= new ToolBarManager(toolbar);
 		}
 		return fToolBarManager;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected void handleCheckStateChanged() {
 		super.handleCheckStateChanged();
 		final RefactoringHistory history= getInput();
 		if (history != null) {
 			final int checked= getCheckedDescriptors().length;
 			final int total= history.getDescriptors().length;
 			if (fSelectAllButton != null)
 				fSelectAllButton.setEnabled(checked < total);
 			if (fDeselectAllButton != null)
 				fDeselectAllButton.setEnabled(checked > 0);
 		}
 	}

 	/**
 	 * Handles the deselect all event.
 	 */
 	protected void handleDeselectAll() {
 		setCheckedDescriptors(EMPTY_DESCRIPTORS);
 	}

 	/**
 	 * Handles the select all event.
 	 */
 	protected void handleSelectAll() {
 		final RefactoringHistory history= getInput();
 		if (history != null)
 			setCheckedDescriptors(history.getDescriptors());
 	}

 	/**
 	 * Is sorting by date enabled?
 	 *
 	 * @return <code>true</code> if it is enabled, <code>false</code>
 	 *         otherwise
 	 */
 	public boolean isSortByDate() {
 		return !isSortByProjects();
 	}

 	/**
 	 * Is sorting by projects enabled?
 	 *
 	 * @return <code>true</code> if it is enabled, <code>false</code>
 	 *         otherwise
 	 */
 	public boolean isSortByProjects() {
 		final IContentProvider provider= fHistoryViewer.getContentProvider();
 		if (provider instanceof BrowseRefactoringHistoryContentProvider) {
 			final BrowseRefactoringHistoryContentProvider extended= (BrowseRefactoringHistoryContentProvider) provider;
 			return extended.isSortProjects();
 		}
 		return false;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	public void setInput(final RefactoringHistory history) {
 		super.setInput(history);
 		if (fDeselectAllButton != null)
 			fDeselectAllButton.setEnabled(false);
 		if (fSelectAllButton != null)
 			fSelectAllButton.setEnabled(history != null && !history.isEmpty());
 	}

 	/**
 	 * Sorts the refactorings by date.
 	 */
 	public void sortByDate() {
 		fSortTimestamps.run();
 	}

 	/**
 	 * Sorts the refactorings by projects.
 	 */
 	public void sortByProjects() {
 		fSortProjects.run();
 	}
 }
	/*******************************************************************************
	* 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
	*******************************************************************************/
	package org.eclipse.ltk.internal.ui.refactoring.history;

	import org.eclipse.core.runtime.Assert;

	import org.eclipse.ltk.core.refactoring.RefactoringDescriptorProxy;
	import org.eclipse.ltk.core.refactoring.history.RefactoringHistory;

	import org.eclipse.ltk.internal.ui.refactoring.RefactoringPluginImages;
	import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIMessages;
	import org.eclipse.ltk.internal.ui.refactoring.util.PixelConverter;
	import org.eclipse.ltk.internal.ui.refactoring.util.SWTUtil;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.ViewForm;
	import org.eclipse.swt.events.DisposeEvent;
	import org.eclipse.swt.events.DisposeListener;
	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.ToolBar;

	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.action.IAction;
	import org.eclipse.jface.action.Separator;
	import org.eclipse.jface.action.ToolBarManager;
	import org.eclipse.jface.viewers.IContentProvider;
	import org.eclipse.jface.viewers.TreeViewer;

	import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryContentProvider;
	import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryControlConfiguration;
	import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryLabelProvider;

	/**
	* Control which is capable of selecting elements of a refactoring history. The
	* refactoring history can be sorted by project or by timestamps.
	* <p>
	* This control expects a control configuration with a checkable tree viewer.
	* </p>
	*
	* @since 3.2
	*/
	public class BrowseRefactoringHistoryControl extends RefactoringHistoryControl {

	/** The empty descriptors constant */
	private static final RefactoringDescriptorProxy[] EMPTY_DESCRIPTORS= {};

	/** The toolbar sort group */
	private static final String TOOLBAR_SORT_GROUP= "group.sort"; //$NON-NLS-1$

	/** The deselect all button, or <code>null</code> */
	private Button fDeselectAllButton= null;

	/** The select all button, or <code>null</code> */
	private Button fSelectAllButton= null;

	/** The sort projects action */
	private final IAction fSortProjects= new Action(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project, IAction.AS_RADIO_BUTTON) {

	public final void run() {
	final BrowseRefactoringHistoryContentProvider provider= (BrowseRefactoringHistoryContentProvider) fHistoryViewer.getContentProvider();
	provider.setSortProjects(true);
	fHistoryViewer.setSorter(fViewerSorter);
	fHistoryViewer.refresh(false);
	setExpandedState();
	reconcileCheckState();
	fSortProjects.setChecked(true);
	fSortTimestamps.setChecked(false);
	}
	};

	/** The sort time stamps action */
	private final IAction fSortTimestamps= new Action(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date, IAction.AS_RADIO_BUTTON) {

	public final void run() {
	final BrowseRefactoringHistoryContentProvider provider= (BrowseRefactoringHistoryContentProvider) fHistoryViewer.getContentProvider();
	provider.setSortProjects(false);
	fHistoryViewer.setSorter(null);
	fHistoryViewer.refresh(false);
	setExpandedState();
	reconcileCheckState();
	fSortTimestamps.setChecked(true);
	fSortProjects.setChecked(false);
	}
	};

	/** The toolbar manager, or <code>null</code> */
	private ToolBarManager fToolBarManager= null;

	/** The viewer sorter */
	private final BrowseRefactoringHistoryViewerSorter fViewerSorter= new BrowseRefactoringHistoryViewerSorter();

	/**
	* Creates a new browse refactoring history control.
	*
	* @param parent
	* the parent control
	* @param configuration
	* the refactoring history control configuration to use
	*/
	public BrowseRefactoringHistoryControl(final Composite parent, final RefactoringHistoryControlConfiguration configuration) {
	super(parent, configuration);

	addDisposeListener(new DisposeListener() {

	public final void widgetDisposed(final DisposeEvent event) {
	if (fToolBarManager != null) {
	fToolBarManager.removeAll();
	fToolBarManager.dispose();
	fToolBarManager= null;
	}
	}
	});
	}

	/**
	* {@inheritDoc}
	*/
	protected void createBottomButtonBar(final Composite parent) {
	Assert.isNotNull(parent);
	final Composite composite= new Composite(parent, SWT.NONE);
	final GridLayout layout= new GridLayout(2, false);
	layout.marginWidth= 0;
	layout.marginHeight= 0;
	layout.marginTop= 5;
	composite.setLayout(layout);

	final GridData data= new GridData();
	data.grabExcessHorizontalSpace= true;
	data.grabExcessVerticalSpace= false;
	data.horizontalAlignment= SWT.FILL;
	data.verticalAlignment= SWT.TOP;
	composite.setLayoutData(data);

	createSelectAllButton(composite);
	createDeselectAllButton(composite);
	}

	/**
	* {@inheritDoc}
	*/
	public void createControl() {
	super.createControl();
	final GridData data= new GridData();
	data.grabExcessHorizontalSpace= true;
	data.heightHint= new PixelConverter(this).convertHeightInCharsToPixels(22);
	data.horizontalAlignment= SWT.FILL;
	data.verticalAlignment= SWT.FILL;
	setLayoutData(data);
	}

	/**
	* Creates the deselect all button of the control.
	*
	* @param parent
	* the parent composite
	*/
	protected void createDeselectAllButton(final Composite parent) {
	Assert.isNotNull(parent);
	fDeselectAllButton= new Button(parent, SWT.NONE);
	fDeselectAllButton.setEnabled(false);
	fDeselectAllButton.setText(RefactoringUIMessages.SelectRefactoringHistoryControl_deselect_all_label);
	final GridData data= new GridData();
	data.horizontalAlignment= GridData.END;
	data.verticalAlignment= GridData.BEGINNING;
	data.widthHint= SWTUtil.getButtonWidthHint(fDeselectAllButton);
	fDeselectAllButton.setLayoutData(data);

	fDeselectAllButton.addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	handleDeselectAll();
	}
	});
	}

	/**
	* {@inheritDoc}
	*/
	protected TreeViewer createHistoryViewer(final Composite parent) {
	Assert.isNotNull(parent);
	TreeViewer viewer= null;
	if (fControlConfiguration.isCheckableViewer())
	viewer= new RefactoringHistoryTreeViewer(parent, SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.MULTI);
	else
	viewer= new TreeViewer(parent, SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.MULTI);
	return viewer;
	}

	/**
	* Creates the select all button of the control.
	*
	* @param parent
	* the parent composite
	*/
	protected void createSelectAllButton(final Composite parent) {
	Assert.isNotNull(parent);
	fSelectAllButton= new Button(parent, SWT.NONE);
	fSelectAllButton.setEnabled(false);
	fSelectAllButton.setText(RefactoringUIMessages.SelectRefactoringHistoryControl_select_all_label);
	final GridData data= new GridData();
	data.horizontalAlignment= GridData.END;
	data.grabExcessHorizontalSpace= true;
	data.verticalAlignment= GridData.BEGINNING;
	data.widthHint= SWTUtil.getButtonWidthHint(fSelectAllButton);
	fSelectAllButton.setLayoutData(data);

	fSelectAllButton.addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	handleSelectAll();
	}
	});
	}

	/**
	* {@inheritDoc}
	*/
	protected void createToolBar(final ViewForm parent) {
	final ToolBarManager manager= getToolBarManager();
	if (manager != null) {
	manager.removeAll();
	manager.add(new Separator(TOOLBAR_SORT_GROUP));
	fSortProjects.setText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project);
	fSortProjects.setToolTipText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project);
	fSortProjects.setDescription(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_project_description);
	fSortProjects.setImageDescriptor(RefactoringPluginImages.DESC_ELCL_SORT_PROJECT);
	fSortProjects.setDisabledImageDescriptor(RefactoringPluginImages.DESC_DLCL_SORT_PROJECT);
	fSortTimestamps.setText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date);
	fSortTimestamps.setToolTipText(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date);
	fSortTimestamps.setDescription(RefactoringUIMessages.BrowseRefactoringHistoryControl_sort_date_description);
	fSortTimestamps.setImageDescriptor(RefactoringPluginImages.DESC_ELCL_SORT_DATE);
	fSortTimestamps.setDisabledImageDescriptor(RefactoringPluginImages.DESC_DLCL_SORT_DATE);
	manager.appendToGroup(TOOLBAR_SORT_GROUP, fSortProjects);
	manager.appendToGroup(TOOLBAR_SORT_GROUP, fSortTimestamps);
	manager.update(true);
	}
	}

	/**
	* {@inheritDoc}
	*/
	protected int getContainerColumns() {
	return 1;
	}

	/**
	* {@inheritDoc}
	*/
	protected RefactoringHistoryContentProvider getContentProvider() {
	return new BrowseRefactoringHistoryContentProvider(fControlConfiguration);
	}

	/**
	* Returns the deselect all button.
	*
	* @return the deselect all button, or <code>null</code>
	*/
	public Button getDeselectAllButton() {
	return fDeselectAllButton;
	}

	/**
	* {@inheritDoc}
	*/
	protected RefactoringHistoryLabelProvider getLabelProvider() {
	return new BrowseRefactoringHistoryLabelProvider(fControlConfiguration);
	}

	/**
	* Returns the select all button.
	*
	* @return the select all button, or <code>null</code>
	*/
	public Button getSelectAllButton() {
	return fSelectAllButton;
	}

	/**
	* Returns the toolbar manager of this control
	*
	* @return the toolbar manager
	*/
	protected ToolBarManager getToolBarManager() {
	if (fToolBarManager == null) {
	final ToolBar toolbar= new ToolBar(fHistoryPane, SWT.FLAT);
	fHistoryPane.setTopCenter(toolbar);
	fToolBarManager= new ToolBarManager(toolbar);
	}
	return fToolBarManager;
	}

	/**
	* {@inheritDoc}
	*/
	protected void handleCheckStateChanged() {
	super.handleCheckStateChanged();
	final RefactoringHistory history= getInput();
	if (history != null) {
	final int checked= getCheckedDescriptors().length;
	final int total= history.getDescriptors().length;
	if (fSelectAllButton != null)
	fSelectAllButton.setEnabled(checked < total);
	if (fDeselectAllButton != null)
	fDeselectAllButton.setEnabled(checked > 0);
	}
	}

	/**
	* Handles the deselect all event.
	*/
	protected void handleDeselectAll() {
	setCheckedDescriptors(EMPTY_DESCRIPTORS);
	}

	/**
	* Handles the select all event.
	*/
	protected void handleSelectAll() {
	final RefactoringHistory history= getInput();
	if (history != null)
	setCheckedDescriptors(history.getDescriptors());
	}

	/**
	* Is sorting by date enabled?
	*
	* @return <code>true</code> if it is enabled, <code>false</code>
	* otherwise
	*/
	public boolean isSortByDate() {
	return !isSortByProjects();
	}

	/**
	* Is sorting by projects enabled?
	*
	* @return <code>true</code> if it is enabled, <code>false</code>
	* otherwise
	*/
	public boolean isSortByProjects() {
	final IContentProvider provider= fHistoryViewer.getContentProvider();
	if (provider instanceof BrowseRefactoringHistoryContentProvider) {
	final BrowseRefactoringHistoryContentProvider extended= (BrowseRefactoringHistoryContentProvider) provider;
	return extended.isSortProjects();
	}
	return false;
	}

	/**
	* {@inheritDoc}
	*/
	public void setInput(final RefactoringHistory history) {
	super.setInput(history);
	if (fDeselectAllButton != null)
	fDeselectAllButton.setEnabled(false);
	if (fSelectAllButton != null)
	fSelectAllButton.setEnabled(history != null && !history.isEmpty());
	}

	/**
	* Sorts the refactorings by date.
	*/
	public void sortByDate() {
	fSortTimestamps.run();
	}

	/**
	* Sorts the refactorings by projects.
	*/
	public void sortByProjects() {
	fSortProjects.run();
	}
	}