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diff --git a/src/com/itmill/toolkit/tests/TreeFilesystemContainer.java b/src/com/itmill/toolkit/tests/TreeFilesystemContainer.java
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+/* 
+@ITMillApache2LicenseForJavaFiles@
+ */
+
+package com.itmill.toolkit.tests;
+
+import java.io.File;
+
+import com.itmill.toolkit.data.util.FilesystemContainer;
+import com.itmill.toolkit.data.util.FilesystemContainer.FileItem;
+import com.itmill.toolkit.demo.util.SampleDirectory;
+import com.itmill.toolkit.ui.ExpandLayout;
+import com.itmill.toolkit.ui.Field;
+import com.itmill.toolkit.ui.Label;
+import com.itmill.toolkit.ui.Panel;
+import com.itmill.toolkit.ui.Tree;
+import com.itmill.toolkit.ui.Window;
+import com.itmill.toolkit.ui.Component.Event;
+import com.itmill.toolkit.ui.Component.Listener;
+
+/**
+ * Browsable file explorer using Toolkit Tree component. Demonstrates: how to
+ * use <code>com.itmill.toolkit.ui.Component.Tree</code> datasource container,
+ * how to create <code>com.itmill.toolkit.data.util.FilesystemContainer</code>,
+ * how to read <code>com.itmill.toolkit.ui.Component.Event</code> objects, how
+ * to receive and handle any event by implementing
+ * <code>com.itmill.toolkit.ui.Component.Listener</code>.
+ * 
+ * @since 4.0.0
+ * 
+ */
+public class TreeFilesystemContainer extends com.itmill.toolkit.Application
+        implements Listener {
+
+    // Filesystem explorer panel and it's components
+    private final Panel explorerPanel = new Panel("Filesystem explorer");
+
+    private final Tree filesystem = new Tree();
+
+    // File properties panel and it's components
+    private final Panel propertyPanel = new Panel("File properties");
+
+    private final Label fileProperties = new Label();
+
+    public void init() {
+        final Window w = new Window("Tree FilesystemContainer demo");
+        setMainWindow(w);
+        final ExpandLayout main = new ExpandLayout();
+        w.setLayout(main);
+        main.setMargin(true);
+        main.setSpacing(true);
+
+        propertyPanel.setHeight(120);
+        main.addComponent(propertyPanel);
+        explorerPanel.setHeight(100);
+        explorerPanel.setHeightUnits(Panel.UNITS_PERCENTAGE);
+        main.addComponent(explorerPanel);
+        main.expand(explorerPanel);
+
+        // Explorer panel contains tree
+        explorerPanel.addComponent(filesystem);
+
+        // Property panel contains label
+        propertyPanel.addComponent(fileProperties);
+        fileProperties.setCaption("No file selected.");
+        propertyPanel.setEnabled(false);
+
+        // Get sample directory
+        final File sampleDir = SampleDirectory.getDirectory(this);
+        // Populate tree with FilesystemContainer
+        final FilesystemContainer fsc = new FilesystemContainer(sampleDir, true);
+        filesystem.setContainerDataSource(fsc);
+        // "this" handles all filesystem events
+        // e.g. node clicked, expanded etc.
+        filesystem.addListener(this);
+        // Value changes are immediate
+        filesystem.setImmediate(true);
+    }
+
+    /**
+     * Listener for any component events. This class has been registered as an
+     * listener for component fsTree.
+     */
+    public void componentEvent(Event event) {
+        // Check if event occured at fsTree component
+        if (event.getSource() == filesystem) {
+            // Check if event is about changing value
+            if (event.getClass() == Field.ValueChangeEvent.class) {
+                // Update property panel contents
+                final FileItem fileItem = (FileItem) filesystem
+                        .getItem(filesystem.getValue());
+                fileProperties.setIcon(fileItem.getIcon());
+                fileProperties.setCaption(fileItem.getName() + ", size "
+                        + fileItem.getSize() + " bytes.");
+                propertyPanel.setEnabled(true);
+            }
+            // here we could check for other type of events for filesystem
+            // component
+        }
+        // here we could check for other component's events
+    }
+
+}