--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet004DataBindingContextErrorLabel.d	Sun Apr 19 11:33:55 2009 +0200
@@ -0,0 +1,96 @@
+/*******************************************************************************
+ * Copyright (c) 2006 Brad Reynolds 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:
+ *     Brad Reynolds - initial API and implementation
+ *     Brad Reynolds - bug 116920, 159768
+ *     Matthew Hall - bug 260329
+ ******************************************************************************/
+
+package org.eclipse.jface.examples.databinding.snippets;
+
+import org.eclipse.core.databinding.AggregateValidationStatus;
+import org.eclipse.core.databinding.DataBindingContext;
+import org.eclipse.core.databinding.UpdateValueStrategy;
+import org.eclipse.core.databinding.observable.Realm;
+import org.eclipse.core.databinding.observable.value.WritableValue;
+import org.eclipse.core.databinding.validation.IValidator;
+import org.eclipse.core.databinding.validation.ValidationStatus;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.jface.databinding.swt.SWTObservables;
+import org.eclipse.jface.layout.GridDataFactory;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Text;
+
+/**
+ * Snippet that displays how to bind the validation error of the
+ * {@link DataBindingContext} to a label. http://www.eclipse.org
+ * 
+ * @since 3.2
+ */
+public class Snippet004DataBindingContextErrorLabel {
+	public static void main(String[] args) {
+		final Display display = new Display();
+		Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
+			public void run() {
+				Shell shell = new Shell(display);
+				shell.setText("Data Binding Snippet 004");
+				shell.setLayout(new GridLayout(2, false));
+
+				new Label(shell, SWT.NONE).setText("Enter '5' to be valid:");
+
+				Text text = new Text(shell, SWT.BORDER);
+				WritableValue value = WritableValue.withValueType(String.class);
+				new Label(shell, SWT.NONE).setText("Error:");
+
+				Label errorLabel = new Label(shell, SWT.BORDER);
+				errorLabel.setForeground(display.getSystemColor(SWT.COLOR_RED));
+				GridDataFactory.swtDefaults().hint(200, SWT.DEFAULT).applyTo(
+						errorLabel);
+
+				DataBindingContext dbc = new DataBindingContext();
+
+				// Bind the text to the value.
+				dbc.bindValue(
+						SWTObservables.observeText(text, SWT.Modify),
+						value,
+						new UpdateValueStrategy().setAfterConvertValidator(new FiveValidator()),
+						null);
+
+				// Bind the error label to the validation error on the dbc.
+				dbc.bindValue(SWTObservables.observeText(errorLabel),
+						new AggregateValidationStatus(dbc.getBindings(),
+								AggregateValidationStatus.MAX_SEVERITY));
+
+				shell.pack();
+				shell.open();
+				while (!shell.isDisposed()) {
+					if (!display.readAndDispatch())
+						display.sleep();
+				}
+			}
+		});
+		display.dispose();
+	}
+
+	/**
+	 * Validator that returns validation errors for any value other than 5.
+	 * 
+	 * @since 3.2
+	 */
+	private static class FiveValidator implements IValidator {
+		public IStatus validate(Object value) {
+			return ("5".equals(value)) ? Status.OK_STATUS : ValidationStatus
+					.error("the value was '" + value + "', not '5'");
+		}
+	}
+}