--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet023ConditionalVisibility.d	Sun Apr 19 11:33:55 2009 +0200
@@ -0,0 +1,115 @@
+/*******************************************************************************
+ * 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.examples.databinding.snippets;
+
+import org.eclipse.core.databinding.observable.Realm;
+import org.eclipse.jface.databinding.swt.ISWTObservableValue;
+import org.eclipse.jface.databinding.swt.SWTObservables;
+import org.eclipse.jface.internal.databinding.provisional.swt.ControlUpdater;
+import org.eclipse.jface.layout.GridLayoutFactory;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.StackLayout;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Group;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Text;
+
+/**
+ * @since 3.2
+ * 
+ */
+public class Snippet023ConditionalVisibility {
+	public static void main(String[] args) {
+		Display display = new Display();
+		final Shell shell = new Shell(display);
+		shell.setLayout(new GridLayout(1, false));
+
+		Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
+			public void run() {
+				new Snippet023ConditionalVisibility().createControls(shell);
+			}
+		});
+
+		shell.pack();
+		shell.open();
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		display.dispose();
+	}
+
+	Text text;
+	Text toText;
+	Text fromText;
+
+	/**
+	 * @param shell
+	 */
+	private void createControls(Shell shell) {
+		Composite composite = new Composite(shell, SWT.NONE);
+		Group radioGroup = new Group(composite, SWT.NONE);
+		radioGroup.setText("Type");
+		Button textButton = new Button(radioGroup, SWT.RADIO);
+		textButton.setText("Text");
+		Button rangeButton = new Button(radioGroup, SWT.RADIO);
+		rangeButton.setText("Range");
+		GridLayoutFactory.swtDefaults().generateLayout(radioGroup);
+
+		final Composite oneOfTwo = new Composite(composite, SWT.NONE);
+		final StackLayout stackLayout = new StackLayout();
+		oneOfTwo.setLayout(stackLayout);
+
+		final Group rangeGroup = new Group(oneOfTwo, SWT.NONE);
+		rangeGroup.setText("Range");
+		Label fromLabel = new Label(rangeGroup, SWT.NONE);
+		fromLabel.setText("From:");
+		fromText = new Text(rangeGroup, SWT.SINGLE | SWT.LEAD | SWT.BORDER);
+
+		Label toLabel = new Label(rangeGroup, SWT.NONE);
+		toLabel.setText("To:");
+		toText = new Text(rangeGroup, SWT.SINGLE | SWT.LEAD | SWT.BORDER);
+		GridLayoutFactory.swtDefaults().numColumns(2)
+				.generateLayout(rangeGroup);
+
+		final Group textGroup = new Group(oneOfTwo, SWT.NONE);
+		textGroup.setText("Text");
+		Label label = new Label(textGroup, SWT.NONE);
+		label.setText("Text:");
+		text = new Text(textGroup, SWT.SINGLE | SWT.LEAD | SWT.BORDER);
+		GridLayoutFactory.swtDefaults().numColumns(2).generateLayout(textGroup);
+
+		GridLayoutFactory.swtDefaults().numColumns(2).generateLayout(composite);
+
+		final ISWTObservableValue rangeSelected = SWTObservables
+				.observeSelection(rangeButton);
+		final ISWTObservableValue textSelected = SWTObservables
+				.observeSelection(textButton);
+
+		// Note that ControlUpdater is not API.
+		new ControlUpdater(oneOfTwo) {
+			protected void updateControl() {
+				if (((Boolean) rangeSelected.getValue()).booleanValue()) {
+					stackLayout.topControl = rangeGroup;
+					oneOfTwo.layout();
+				} else if (((Boolean) textSelected.getValue()).booleanValue()) {
+					stackLayout.topControl = textGroup;
+					oneOfTwo.layout();
+				}
+			}
+		};
+	}
+}