[NONE] Ensure viewer contents is cleared when Logo View is diposed.

org.eclipse.gef4.mvc.examples.logo.ui/src/org/eclipse/gef4/mvc/examples/logo/ui/view/MvcLogoExampleView.java

@@ -106,19 +106,26 @@ public IStatus undo(IProgressMonitor monitor, IAdaptable info) {
 	public MvcLogoExampleView() {
 		super(Guice.createInjector(Modules.override(new MvcLogoExampleModule())
 				.with(new MvcLogoExampleUiModule())));
-		// set default contents (GEF logo)
-		FXViewer viewer = getContentViewer();
-		ContentModel contentModel = viewer.getAdapter(ContentModel.class);
-		contentModel.getContents()
+
+		// set initial contents
+		getContentViewer()
+				.getAdapter(ContentModel.class).getContents()
 				.setAll(MvcLogoExample.createDefaultContents());
-		// set palette contents
-		FXViewer paletteViewer = getPaletteViewer();
-		ContentModel paletteContentModel = paletteViewer
-				.getAdapter(ContentModel.class);
-		paletteContentModel.getContents()
+		getPaletteViewer()
+				.getAdapter(ContentModel.class).getContents()
 				.setAll(MvcLogoExample.createPaletteContents());
 	}
 
+	@Override
+	public void dispose() {
+
+		// clear viewer contents
+		getContentViewer().getAdapter(ContentModel.class).contentsProperty().clear();
+		getPaletteViewer().getAdapter(ContentModel.class).contentsProperty().clear();
+
+		super.dispose();
+	}
+
 	@SuppressWarnings("rawtypes")
 	@Override
 	public Object getAdapter(Class key) {