### Eclipse Workspace Patch 1.0
#P org.eclipse.jface.databinding
Index: src/org/eclipse/jface/databinding/wizard/WizardPageSupport.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/wizard/WizardPageSupport.java,v
retrieving revision 1.5
diff -u -r1.5 WizardPageSupport.java
--- src/org/eclipse/jface/databinding/wizard/WizardPageSupport.java	15 May 2008 23:19:43 -0000	1.5
+++ src/org/eclipse/jface/databinding/wizard/WizardPageSupport.java	7 Jul 2008 22:36:39 -0000
@@ -13,27 +13,9 @@
  *******************************************************************************/
 package org.eclipse.jface.databinding.wizard;
 
-import java.util.Iterator;
-
-import org.eclipse.core.databinding.AggregateValidationStatus;
 import org.eclipse.core.databinding.DataBindingContext;
-import org.eclipse.core.databinding.ValidationStatusProvider;
-import org.eclipse.core.databinding.observable.ChangeEvent;
-import org.eclipse.core.databinding.observable.IChangeListener;
-import org.eclipse.core.databinding.observable.IObservable;
-import org.eclipse.core.databinding.observable.list.IListChangeListener;
-import org.eclipse.core.databinding.observable.list.IObservableList;
-import org.eclipse.core.databinding.observable.list.ListChangeEvent;
-import org.eclipse.core.databinding.observable.list.ListDiff;
-import org.eclipse.core.databinding.observable.list.ListDiffEntry;
-import org.eclipse.core.databinding.observable.value.IValueChangeListener;
-import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
-import org.eclipse.core.databinding.util.Policy;
-import org.eclipse.core.runtime.AssertionFailedException;
 import org.eclipse.core.runtime.IStatus;
-import org.eclipse.core.runtime.MultiStatus;
-import org.eclipse.core.runtime.Status;
-import org.eclipse.jface.dialogs.IMessageProvider;
+import org.eclipse.jface.databinding.dialog.DialogPageSupport;
 import org.eclipse.jface.wizard.WizardPage;
 
 /**
@@ -42,15 +24,13 @@
  * message accordingly.
  * 
  * @noextend This class is not intended to be subclassed by clients.
- *
+ * 
  * @since 1.1
  */
-public class WizardPageSupport {
-
-	private WizardPage wizardPage;
-	private DataBindingContext dbc;
-	private AggregateValidationStatus aggregateStatus;
-	private boolean uiChanged = false;
+public class WizardPageSupport extends DialogPageSupport {
+	private WizardPageSupport(WizardPage wizardPage, DataBindingContext dbc) {
+		super(wizardPage, dbc);
+	}
 
 	/**
 	 * Connect the validation result from the given data binding context to the
@@ -71,229 +51,15 @@
 		return new WizardPageSupport(wizardPage, dbc);
 	}
 
-	private WizardPageSupport(WizardPage wizardPage, DataBindingContext dbc) {
-		this.wizardPage = wizardPage;
-		this.dbc = dbc;
-		init();
-	}
-
-	private IChangeListener uiChangeListener = new IChangeListener() {
-		public void handleChange(ChangeEvent event) {
-			handleUIChanged();
-		}
-	};
-	private IListChangeListener validationStatusProvidersListener = new IListChangeListener() {
-		public void handleListChange(ListChangeEvent event) {
-			ListDiff diff = event.diff;
-			ListDiffEntry[] differences = diff.getDifferences();
-			for (int i = 0; i < differences.length; i++) {
-				ListDiffEntry listDiffEntry = differences[i];
-				ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) listDiffEntry
-						.getElement();
-				IObservableList targets = validationStatusProvider.getTargets();
-				if (listDiffEntry.isAddition()) {
-					targets
-							.addListChangeListener(validationStatusProviderTargetsListener);
-					for (Iterator it = targets.iterator(); it.hasNext();) {
-						((IObservable) it.next())
-								.addChangeListener(uiChangeListener);
-					}
-				} else {
-					targets
-							.removeListChangeListener(validationStatusProviderTargetsListener);
-					for (Iterator it = targets.iterator(); it.hasNext();) {
-						((IObservable) it.next())
-								.removeChangeListener(uiChangeListener);
-					}
-				}
-			}
-		}
-	};
-	private IListChangeListener validationStatusProviderTargetsListener = new IListChangeListener() {
-		public void handleListChange(ListChangeEvent event) {
-			ListDiff diff = event.diff;
-			ListDiffEntry[] differences = diff.getDifferences();
-			for (int i = 0; i < differences.length; i++) {
-				ListDiffEntry listDiffEntry = differences[i];
-				IObservable target = (IObservable) listDiffEntry.getElement();
-				if (listDiffEntry.isAddition()) {
-					target.addChangeListener(uiChangeListener);
-				} else {
-					target.removeChangeListener(uiChangeListener);
-				}
-			}
-		}
-	};
-	private IStatus currentStatus;
-
-	protected void init() {
-		aggregateStatus = new AggregateValidationStatus(dbc
-				.getValidationStatusProviders(),
-				AggregateValidationStatus.MAX_SEVERITY);
-		aggregateStatus.addValueChangeListener(new IValueChangeListener() {
-			public void handleValueChange(ValueChangeEvent event) {
-
-				currentStatus = (IStatus) event.diff.getNewValue();
-				handleStatusChanged();
-			}
-		});
-		currentStatus = (IStatus) aggregateStatus.getValue();
-		handleStatusChanged();
-		dbc.getValidationStatusProviders().addListChangeListener(
-				validationStatusProvidersListener);
-		for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
-				.hasNext();) {
-			ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
-					.next();
-			IObservableList targets = validationStatusProvider.getTargets();
-			targets
-					.addListChangeListener(validationStatusProviderTargetsListener);
-			for (Iterator iter = targets.iterator(); iter.hasNext();) {
-				((IObservable) iter.next()).addChangeListener(uiChangeListener);
-			}
-		}
-	}
-
-	protected void handleUIChanged() {
-		uiChanged = true;
-		if (currentStatus != null) {
-			handleStatusChanged();
-		}
-		dbc.getValidationStatusProviders().removeListChangeListener(
-				validationStatusProvidersListener);
-		for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
-				.hasNext();) {
-			ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
-					.next();
-			IObservableList targets = validationStatusProvider.getTargets();
-			targets
-					.removeListChangeListener(validationStatusProviderTargetsListener);
-			for (Iterator iter = targets.iterator(); iter.hasNext();) {
-				((IObservable) iter.next())
-						.removeChangeListener(uiChangeListener);
-			}
-		}
-	}
-
 	protected void handleStatusChanged() {
-		if (currentStatus != null
-				&& currentStatus.getSeverity() == IStatus.ERROR) {
-			wizardPage.setPageComplete(false);
-			wizardPage.setMessage(null);
-			wizardPage.setErrorMessage(uiChanged ? currentStatus.getMessage()
-					: null);
-			if (currentStatusHasException()) {
-				handleStatusException();
-			}
-		} else if (currentStatus != null
-				&& currentStatus.getSeverity() != IStatus.OK) {
-			int severity = currentStatus.getSeverity();
-			wizardPage.setPageComplete((severity & IStatus.CANCEL) != 0);
-			int type;
-			switch (severity) {
-			case IStatus.OK:
-				type = IMessageProvider.NONE;
-				break;
-			case IStatus.CANCEL:
-				type = IMessageProvider.NONE;
-				break;
-			case IStatus.INFO:
-				type = IMessageProvider.INFORMATION;
-				break;
-			case IStatus.WARNING:
-				type = IMessageProvider.WARNING;
-				break;
-			case IStatus.ERROR:
-				type = IMessageProvider.ERROR;
-				break;
-			default:
-				throw new AssertionFailedException(
-						"incomplete switch statement"); //$NON-NLS-1$
-			}
-			wizardPage.setErrorMessage(null);
-			wizardPage.setMessage(currentStatus.getMessage(), type);
-		} else {
-			wizardPage.setPageComplete(true);
-			wizardPage.setMessage(null);
-			wizardPage.setErrorMessage(null);
-		}
-	}
-
-	private boolean currentStatusHasException() {
-		boolean hasException = false;
-		if (currentStatus.getException() != null) {
-			hasException = true;
-		}
-		if (currentStatus instanceof MultiStatus) {
-			MultiStatus multiStatus = (MultiStatus) currentStatus;
-
-			for (int i = 0; i < multiStatus.getChildren().length; i++) {
-				IStatus status = multiStatus.getChildren()[i];
-				if (status.getException() != null) {
-					hasException = true;
-					break;
-				}
-			}
-		}
-		return hasException;
-	}
-
-	/**
-	 * This is called when a Override to provide custom exception handling and
-	 * reporting.
-	 */
-	protected void handleStatusException() {
-		if (currentStatus.getException() != null) {
-			logThrowable(currentStatus.getException());
-		} else if (currentStatus instanceof MultiStatus) {
-			MultiStatus multiStatus = (MultiStatus) currentStatus;
-			for (int i = 0; i < multiStatus.getChildren().length; i++) {
-				IStatus status = multiStatus.getChildren()[i];
-				if (status.getException() != null) {
-					logThrowable(status.getException());
-				}
-			}
-		}
-	}
-
-	private void logThrowable(Throwable throwable) {
-		Policy
-				.getLog()
-				.log(
-						new Status(
-								IStatus.ERROR,
-								Policy.JFACE_DATABINDING,
-								IStatus.OK,
-								"Unhandled exception: " + throwable.getMessage(), throwable)); //$NON-NLS-1$
-	}
-
-	/**
-	 * Disposes of this wizard page support object, removing any listeners it
-	 * may have attached.
-	 */
-	public void dispose() {
-		aggregateStatus.dispose();
-		if (!uiChanged) {
-			for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
-					.hasNext();) {
-				ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
-						.next();
-				IObservableList targets = validationStatusProvider.getTargets();
-				targets
-						.removeListChangeListener(validationStatusProviderTargetsListener);
-				for (Iterator iter = targets.iterator(); iter.hasNext();) {
-					((IObservable) iter.next())
-							.removeChangeListener(uiChangeListener);
-				}
-			}
-			dbc.getValidationStatusProviders().removeListChangeListener(
-					validationStatusProvidersListener);
+		super.handleStatusChanged();
+		boolean pageComplete = true;
+		if (currentStatus != null) {
+			if (currentStatus.getSeverity() == IStatus.ERROR)
+				pageComplete = false;
+			if ((currentStatus.getSeverity() & IStatus.CANCEL) != 0)
+				pageComplete = false;
 		}
-		aggregateStatus = null;
-		dbc = null;
-		uiChangeListener = null;
-		validationStatusProvidersListener = null;
-		validationStatusProviderTargetsListener = null;
-		wizardPage = null;
+		((WizardPage) getDialogPage()).setPageComplete(pageComplete);
 	}
 }
Index: src/org/eclipse/jface/databinding/dialog/DialogPageSupport.java
===================================================================
RCS file: src/org/eclipse/jface/databinding/dialog/DialogPageSupport.java
diff -N src/org/eclipse/jface/databinding/dialog/DialogPageSupport.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/org/eclipse/jface/databinding/dialog/DialogPageSupport.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,294 @@
+/*******************************************************************************
+ * Copyright (c) 2008 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.jface.databinding.dialog;
+
+import java.util.Iterator;
+
+import org.eclipse.core.databinding.AggregateValidationStatus;
+import org.eclipse.core.databinding.DataBindingContext;
+import org.eclipse.core.databinding.ValidationStatusProvider;
+import org.eclipse.core.databinding.observable.ChangeEvent;
+import org.eclipse.core.databinding.observable.IChangeListener;
+import org.eclipse.core.databinding.observable.IObservable;
+import org.eclipse.core.databinding.observable.list.IListChangeListener;
+import org.eclipse.core.databinding.observable.list.IObservableList;
+import org.eclipse.core.databinding.observable.list.ListChangeEvent;
+import org.eclipse.core.databinding.observable.list.ListDiff;
+import org.eclipse.core.databinding.observable.list.ListDiffEntry;
+import org.eclipse.core.databinding.observable.value.IObservableValue;
+import org.eclipse.core.databinding.observable.value.IValueChangeListener;
+import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
+import org.eclipse.core.databinding.util.Policy;
+import org.eclipse.core.runtime.AssertionFailedException;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.MultiStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.jface.dialogs.DialogPage;
+import org.eclipse.jface.dialogs.IMessageProvider;
+import org.eclipse.jface.wizard.WizardPage;
+
+/**
+ * @since 3.3
+ *
+ */
+public class DialogPageSupport {
+	private DialogPage dialogPage;
+	private DataBindingContext dbc;
+	private IObservableValue aggregateStatus;
+	private boolean uiChanged = false;
+	private IChangeListener uiChangeListener = new IChangeListener() {
+			public void handleChange(ChangeEvent event) {
+				handleUIChanged();
+			}
+		};
+	private IListChangeListener validationStatusProvidersListener = new IListChangeListener() {
+			public void handleListChange(ListChangeEvent event) {
+				ListDiff diff = event.diff;
+				ListDiffEntry[] differences = diff.getDifferences();
+				for (int i = 0; i < differences.length; i++) {
+					ListDiffEntry listDiffEntry = differences[i];
+					ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) listDiffEntry
+							.getElement();
+					IObservableList targets = validationStatusProvider.getTargets();
+					if (listDiffEntry.isAddition()) {
+						targets
+								.addListChangeListener(validationStatusProviderTargetsListener);
+						for (Iterator it = targets.iterator(); it.hasNext();) {
+							((IObservable) it.next())
+									.addChangeListener(uiChangeListener);
+						}
+					} else {
+						targets
+								.removeListChangeListener(validationStatusProviderTargetsListener);
+						for (Iterator it = targets.iterator(); it.hasNext();) {
+							((IObservable) it.next())
+									.removeChangeListener(uiChangeListener);
+						}
+					}
+				}
+			}
+		};
+	private IListChangeListener validationStatusProviderTargetsListener = new IListChangeListener() {
+			public void handleListChange(ListChangeEvent event) {
+				ListDiff diff = event.diff;
+				ListDiffEntry[] differences = diff.getDifferences();
+				for (int i = 0; i < differences.length; i++) {
+					ListDiffEntry listDiffEntry = differences[i];
+					IObservable target = (IObservable) listDiffEntry.getElement();
+					if (listDiffEntry.isAddition()) {
+						target.addChangeListener(uiChangeListener);
+					} else {
+						target.removeChangeListener(uiChangeListener);
+					}
+				}
+			}
+		};
+	protected IStatus currentStatus;
+
+	protected DialogPageSupport(DialogPage dialogPage, DataBindingContext dbc) {
+		this.dialogPage = dialogPage;
+		this.dbc = dbc;
+		init();
+	}
+
+	/**
+	 * Connect the validation result from the given data binding context to the
+	 * given wizard page. Upon creation, the wizard page support will use the
+	 * context's validation result to determine whether the page is complete.
+	 * The page's error message will not be set at this time ensuring that the
+	 * wizard page does not show an error right away. Upon any validation result
+	 * change, {@link WizardPage#setPageComplete(boolean)} will be called
+	 * reflecting the new validation result, and the wizard page's error message
+	 * will be updated according to the current validation result.
+	 * 
+	 * @param wizardPage
+	 * @param dbc
+	 * @return an instance of WizardPageSupport
+	 */
+	public static DialogPageSupport create(DialogPage wizardPage,
+			DataBindingContext dbc) {
+		return new DialogPageSupport(wizardPage, dbc);
+	}
+
+	protected DialogPage getDialogPage() {
+		return dialogPage;
+	}
+
+	protected void init() {
+		aggregateStatus = new AggregateValidationStatus(dbc
+				.getValidationStatusProviders(),
+				AggregateValidationStatus.MAX_SEVERITY);
+		aggregateStatus.addValueChangeListener(new IValueChangeListener() {
+			public void handleValueChange(ValueChangeEvent event) {
+	
+				currentStatus = (IStatus) event.diff.getNewValue();
+				handleStatusChanged();
+			}
+		});
+		currentStatus = (IStatus) aggregateStatus.getValue();
+		handleStatusChanged();
+		dbc.getValidationStatusProviders().addListChangeListener(
+				validationStatusProvidersListener);
+		for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
+				.hasNext();) {
+			ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
+					.next();
+			IObservableList targets = validationStatusProvider.getTargets();
+			targets
+					.addListChangeListener(validationStatusProviderTargetsListener);
+			for (Iterator iter = targets.iterator(); iter.hasNext();) {
+				((IObservable) iter.next()).addChangeListener(uiChangeListener);
+			}
+		}
+	}
+
+	protected void handleUIChanged() {
+		uiChanged = true;
+		if (currentStatus != null) {
+			handleStatusChanged();
+		}
+		dbc.getValidationStatusProviders().removeListChangeListener(
+				validationStatusProvidersListener);
+		for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
+				.hasNext();) {
+			ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
+					.next();
+			IObservableList targets = validationStatusProvider.getTargets();
+			targets
+					.removeListChangeListener(validationStatusProviderTargetsListener);
+			for (Iterator iter = targets.iterator(); iter.hasNext();) {
+				((IObservable) iter.next())
+						.removeChangeListener(uiChangeListener);
+			}
+		}
+	}
+
+	protected void handleStatusChanged() {
+		if (currentStatus != null
+				&& currentStatus.getSeverity() == IStatus.ERROR) {
+			dialogPage.setMessage(null);
+			dialogPage.setErrorMessage(uiChanged ? currentStatus.getMessage()
+					: null);
+			if (currentStatusHasException()) {
+				handleStatusException();
+			}
+		} else if (currentStatus != null
+				&& currentStatus.getSeverity() != IStatus.OK) {
+			int severity = currentStatus.getSeverity();
+			int type;
+			switch (severity) {
+			case IStatus.OK:
+				type = IMessageProvider.NONE;
+				break;
+			case IStatus.CANCEL:
+				type = IMessageProvider.NONE;
+				break;
+			case IStatus.INFO:
+				type = IMessageProvider.INFORMATION;
+				break;
+			case IStatus.WARNING:
+				type = IMessageProvider.WARNING;
+				break;
+			case IStatus.ERROR:
+				type = IMessageProvider.ERROR;
+				break;
+			default:
+				throw new AssertionFailedException(
+						"incomplete switch statement"); //$NON-NLS-1$
+			}
+			dialogPage.setErrorMessage(null);
+			dialogPage.setMessage(currentStatus.getMessage(), type);
+		} else {
+			dialogPage.setMessage(null);
+			dialogPage.setErrorMessage(null);
+		}
+	}
+
+	private boolean currentStatusHasException() {
+		boolean hasException = false;
+		if (currentStatus.getException() != null) {
+			hasException = true;
+		}
+		if (currentStatus instanceof MultiStatus) {
+			MultiStatus multiStatus = (MultiStatus) currentStatus;
+	
+			for (int i = 0; i < multiStatus.getChildren().length; i++) {
+				IStatus status = multiStatus.getChildren()[i];
+				if (status.getException() != null) {
+					hasException = true;
+					break;
+				}
+			}
+		}
+		return hasException;
+	}
+
+	/**
+	 * This is called when a Override to provide custom exception handling and
+	 * reporting.
+	 */
+	protected void handleStatusException() {
+		if (currentStatus.getException() != null) {
+			logThrowable(currentStatus.getException());
+		} else if (currentStatus instanceof MultiStatus) {
+			MultiStatus multiStatus = (MultiStatus) currentStatus;
+			for (int i = 0; i < multiStatus.getChildren().length; i++) {
+				IStatus status = multiStatus.getChildren()[i];
+				if (status.getException() != null) {
+					logThrowable(status.getException());
+				}
+			}
+		}
+	}
+
+	private void logThrowable(Throwable throwable) {
+		Policy
+				.getLog()
+				.log(
+						new Status(
+								IStatus.ERROR,
+								Policy.JFACE_DATABINDING,
+								IStatus.OK,
+								"Unhandled exception: " + throwable.getMessage(), throwable)); //$NON-NLS-1$
+	}
+
+	/**
+	 * Disposes of this wizard page support object, removing any listeners it
+	 * may have attached.
+	 */
+	public void dispose() {
+		aggregateStatus.dispose();
+		if (!uiChanged) {
+			for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
+					.hasNext();) {
+				ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
+						.next();
+				IObservableList targets = validationStatusProvider.getTargets();
+				targets
+						.removeListChangeListener(validationStatusProviderTargetsListener);
+				for (Iterator iter = targets.iterator(); iter.hasNext();) {
+					((IObservable) iter.next())
+							.removeChangeListener(uiChangeListener);
+				}
+			}
+			dbc.getValidationStatusProviders().removeListChangeListener(
+					validationStatusProvidersListener);
+		}
+		aggregateStatus = null;
+		dbc = null;
+		uiChangeListener = null;
+		validationStatusProvidersListener = null;
+		validationStatusProviderTargetsListener = null;
+		dialogPage = null;
+	}
+
+}
Index: src/org/eclipse/jface/databinding/dialog/TitleAreaDialogSupport.java
===================================================================
RCS file: src/org/eclipse/jface/databinding/dialog/TitleAreaDialogSupport.java
diff -N src/org/eclipse/jface/databinding/dialog/TitleAreaDialogSupport.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/org/eclipse/jface/databinding/dialog/TitleAreaDialogSupport.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,293 @@
+/*******************************************************************************
+ * Copyright (c) 2008 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.jface.databinding.dialog;
+
+import java.util.Iterator;
+
+import org.eclipse.core.databinding.AggregateValidationStatus;
+import org.eclipse.core.databinding.DataBindingContext;
+import org.eclipse.core.databinding.ValidationStatusProvider;
+import org.eclipse.core.databinding.observable.ChangeEvent;
+import org.eclipse.core.databinding.observable.IChangeListener;
+import org.eclipse.core.databinding.observable.IObservable;
+import org.eclipse.core.databinding.observable.list.IListChangeListener;
+import org.eclipse.core.databinding.observable.list.IObservableList;
+import org.eclipse.core.databinding.observable.list.ListChangeEvent;
+import org.eclipse.core.databinding.observable.list.ListDiff;
+import org.eclipse.core.databinding.observable.list.ListDiffEntry;
+import org.eclipse.core.databinding.observable.value.IObservableValue;
+import org.eclipse.core.databinding.observable.value.IValueChangeListener;
+import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
+import org.eclipse.core.databinding.util.Policy;
+import org.eclipse.core.runtime.AssertionFailedException;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.MultiStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.jface.dialogs.IMessageProvider;
+import org.eclipse.jface.dialogs.TitleAreaDialog;
+import org.eclipse.jface.wizard.WizardPage;
+
+/**
+ * @since 3.3
+ * 
+ */
+public class TitleAreaDialogSupport {
+	private TitleAreaDialog dialog;
+	private DataBindingContext dbc;
+	private IObservableValue aggregateStatus;
+	private boolean uiChanged = false;
+	private IChangeListener uiChangeListener = new IChangeListener() {
+		public void handleChange(ChangeEvent event) {
+			handleUIChanged();
+		}
+	};
+	private IListChangeListener validationStatusProvidersListener = new IListChangeListener() {
+		public void handleListChange(ListChangeEvent event) {
+			ListDiff diff = event.diff;
+			ListDiffEntry[] differences = diff.getDifferences();
+			for (int i = 0; i < differences.length; i++) {
+				ListDiffEntry listDiffEntry = differences[i];
+				ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) listDiffEntry
+						.getElement();
+				IObservableList targets = validationStatusProvider.getTargets();
+				if (listDiffEntry.isAddition()) {
+					targets
+							.addListChangeListener(validationStatusProviderTargetsListener);
+					for (Iterator it = targets.iterator(); it.hasNext();) {
+						((IObservable) it.next())
+								.addChangeListener(uiChangeListener);
+					}
+				} else {
+					targets
+							.removeListChangeListener(validationStatusProviderTargetsListener);
+					for (Iterator it = targets.iterator(); it.hasNext();) {
+						((IObservable) it.next())
+								.removeChangeListener(uiChangeListener);
+					}
+				}
+			}
+		}
+	};
+	private IListChangeListener validationStatusProviderTargetsListener = new IListChangeListener() {
+		public void handleListChange(ListChangeEvent event) {
+			ListDiff diff = event.diff;
+			ListDiffEntry[] differences = diff.getDifferences();
+			for (int i = 0; i < differences.length; i++) {
+				ListDiffEntry listDiffEntry = differences[i];
+				IObservable target = (IObservable) listDiffEntry.getElement();
+				if (listDiffEntry.isAddition()) {
+					target.addChangeListener(uiChangeListener);
+				} else {
+					target.removeChangeListener(uiChangeListener);
+				}
+			}
+		}
+	};
+	protected IStatus currentStatus;
+
+	protected TitleAreaDialogSupport(TitleAreaDialog dialogPage,
+			DataBindingContext dbc) {
+		this.dialog = dialogPage;
+		this.dbc = dbc;
+		init();
+	}
+
+	/**
+	 * Connect the validation result from the given data binding context to the
+	 * given wizard page. Upon creation, the wizard page support will use the
+	 * context's validation result to determine whether the page is complete.
+	 * The page's error message will not be set at this time ensuring that the
+	 * wizard page does not show an error right away. Upon any validation result
+	 * change, {@link WizardPage#setPageComplete(boolean)} will be called
+	 * reflecting the new validation result, and the wizard page's error message
+	 * will be updated according to the current validation result.
+	 * 
+	 * @param wizardPage
+	 * @param dbc
+	 * @return an instance of WizardPageSupport
+	 */
+	public static TitleAreaDialogSupport create(TitleAreaDialog wizardPage,
+			DataBindingContext dbc) {
+		return new TitleAreaDialogSupport(wizardPage, dbc);
+	}
+
+	protected void init() {
+		aggregateStatus = new AggregateValidationStatus(dbc
+				.getValidationStatusProviders(),
+				AggregateValidationStatus.MAX_SEVERITY);
+		aggregateStatus.addValueChangeListener(new IValueChangeListener() {
+			public void handleValueChange(ValueChangeEvent event) {
+
+				currentStatus = (IStatus) event.diff.getNewValue();
+				handleStatusChanged();
+			}
+		});
+		currentStatus = (IStatus) aggregateStatus.getValue();
+		handleStatusChanged();
+		dbc.getValidationStatusProviders().addListChangeListener(
+				validationStatusProvidersListener);
+		for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
+				.hasNext();) {
+			ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
+					.next();
+			IObservableList targets = validationStatusProvider.getTargets();
+			targets
+					.addListChangeListener(validationStatusProviderTargetsListener);
+			for (Iterator iter = targets.iterator(); iter.hasNext();) {
+				((IObservable) iter.next()).addChangeListener(uiChangeListener);
+			}
+		}
+	}
+
+	protected void handleUIChanged() {
+		uiChanged = true;
+		if (currentStatus != null) {
+			handleStatusChanged();
+		}
+		dbc.getValidationStatusProviders().removeListChangeListener(
+				validationStatusProvidersListener);
+		for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
+				.hasNext();) {
+			ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
+					.next();
+			IObservableList targets = validationStatusProvider.getTargets();
+			targets
+					.removeListChangeListener(validationStatusProviderTargetsListener);
+			for (Iterator iter = targets.iterator(); iter.hasNext();) {
+				((IObservable) iter.next())
+						.removeChangeListener(uiChangeListener);
+			}
+		}
+	}
+
+	protected void handleStatusChanged() {
+		if (dialog.getShell() == null || dialog.getShell().isDisposed())
+			return;
+		if (currentStatus != null
+				&& currentStatus.getSeverity() == IStatus.ERROR) {
+			dialog.setMessage(null);
+			dialog.setErrorMessage(uiChanged ? currentStatus.getMessage()
+					: null);
+			if (currentStatusHasException()) {
+				handleStatusException();
+			}
+		} else if (currentStatus != null
+				&& currentStatus.getSeverity() != IStatus.OK) {
+			int severity = currentStatus.getSeverity();
+			int type;
+			switch (severity) {
+			case IStatus.OK:
+				type = IMessageProvider.NONE;
+				break;
+			case IStatus.CANCEL:
+				type = IMessageProvider.NONE;
+				break;
+			case IStatus.INFO:
+				type = IMessageProvider.INFORMATION;
+				break;
+			case IStatus.WARNING:
+				type = IMessageProvider.WARNING;
+				break;
+			case IStatus.ERROR:
+				type = IMessageProvider.ERROR;
+				break;
+			default:
+				throw new AssertionFailedException(
+						"incomplete switch statement"); //$NON-NLS-1$
+			}
+			dialog.setErrorMessage(null);
+			dialog.setMessage(currentStatus.getMessage(), type);
+		} else {
+			dialog.setMessage(null);
+			dialog.setErrorMessage(null);
+		}
+	}
+
+	private boolean currentStatusHasException() {
+		boolean hasException = false;
+		if (currentStatus.getException() != null) {
+			hasException = true;
+		}
+		if (currentStatus instanceof MultiStatus) {
+			MultiStatus multiStatus = (MultiStatus) currentStatus;
+
+			for (int i = 0; i < multiStatus.getChildren().length; i++) {
+				IStatus status = multiStatus.getChildren()[i];
+				if (status.getException() != null) {
+					hasException = true;
+					break;
+				}
+			}
+		}
+		return hasException;
+	}
+
+	/**
+	 * This is called when a Override to provide custom exception handling and
+	 * reporting.
+	 */
+	protected void handleStatusException() {
+		if (currentStatus.getException() != null) {
+			logThrowable(currentStatus.getException());
+		} else if (currentStatus instanceof MultiStatus) {
+			MultiStatus multiStatus = (MultiStatus) currentStatus;
+			for (int i = 0; i < multiStatus.getChildren().length; i++) {
+				IStatus status = multiStatus.getChildren()[i];
+				if (status.getException() != null) {
+					logThrowable(status.getException());
+				}
+			}
+		}
+	}
+
+	private void logThrowable(Throwable throwable) {
+		Policy
+				.getLog()
+				.log(
+						new Status(
+								IStatus.ERROR,
+								Policy.JFACE_DATABINDING,
+								IStatus.OK,
+								"Unhandled exception: " + throwable.getMessage(), throwable)); //$NON-NLS-1$
+	}
+
+	/**
+	 * Disposes of this wizard page support object, removing any listeners it
+	 * may have attached.
+	 */
+	public void dispose() {
+		aggregateStatus.dispose();
+		if (!uiChanged) {
+			for (Iterator it = dbc.getValidationStatusProviders().iterator(); it
+					.hasNext();) {
+				ValidationStatusProvider validationStatusProvider = (ValidationStatusProvider) it
+						.next();
+				IObservableList targets = validationStatusProvider.getTargets();
+				targets
+						.removeListChangeListener(validationStatusProviderTargetsListener);
+				for (Iterator iter = targets.iterator(); iter.hasNext();) {
+					((IObservable) iter.next())
+							.removeChangeListener(uiChangeListener);
+				}
+			}
+			dbc.getValidationStatusProviders().removeListChangeListener(
+					validationStatusProvidersListener);
+		}
+		aggregateStatus = null;
+		dbc = null;
+		uiChangeListener = null;
+		validationStatusProvidersListener = null;
+		validationStatusProviderTargetsListener = null;
+		dialog = null;
+	}
+
+}
Index: src/org/eclipse/jface/databinding/preference/PreferencePageSupport.java
===================================================================
RCS file: src/org/eclipse/jface/databinding/preference/PreferencePageSupport.java
diff -N src/org/eclipse/jface/databinding/preference/PreferencePageSupport.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/org/eclipse/jface/databinding/preference/PreferencePageSupport.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2008 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
+ *     Boris Bokowski - bug 218269
+ *     Matthew Hall - bug 218269
+ *     Ashley Cambrell - bug 199179 
+ *******************************************************************************/
+package org.eclipse.jface.databinding.preference;
+
+import org.eclipse.core.databinding.DataBindingContext;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.jface.databinding.dialog.DialogPageSupport;
+import org.eclipse.jface.preference.PreferencePage;
+
+/**
+ * Connects the validation result from the given data binding context to the
+ * given preference page, updating the preference page's valid state and its
+ * error message accordingly.
+ * 
+ * @noextend This class is not intended to be subclassed by clients.
+ * 
+ * @since 1.1
+ */
+public class PreferencePageSupport extends DialogPageSupport {
+	private PreferencePage preferencePage;
+
+	private PreferencePageSupport(PreferencePage preferencePage,
+			DataBindingContext dbc) {
+		super(preferencePage, dbc);
+		this.preferencePage = preferencePage;
+	}
+
+	/**
+	 * Connect the validation result from the given data binding context to the
+	 * given preference page. Upon creation, the preference page support will
+	 * use the context's validation result to determine whether the page is
+	 * valid. The page's error message will not be set at this time ensuring
+	 * that the preference page does not show an error right away. Upon any
+	 * validation result change, {@link PreferencePage#setValid(boolean)} will
+	 * be called reflecting the new validation result, and the preference page's
+	 * error message will be updated according to the current validation result.
+	 * 
+	 * @param preferencePage
+	 * @param dbc
+	 * @return an instance of PreferencePageSupport
+	 */
+	public static PreferencePageSupport create(PreferencePage preferencePage,
+			DataBindingContext dbc) {
+		return new PreferencePageSupport(preferencePage, dbc);
+	}
+
+	protected void handleStatusChanged() {
+		super.handleStatusChanged();
+		boolean valid = true;
+		if (currentStatus != null) {
+			if (currentStatus.getSeverity() == IStatus.ERROR)
+				valid = false;
+			if ((currentStatus.getSeverity() & IStatus.CANCEL) != 0)
+				valid = false;
+		}
+		preferencePage.setValid(valid);
+	}
+}