Bug 330699 [Compatibility] Toolbar drop downs do not appear
Toolbar drop downs in the workbench window like search, new class, run/debug all don't show up.
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/ToolItemRenderer.java
import org.osgi.service.event.EventHandler;
/**
 * Create a contribute part.
 */
public class ToolItemRenderer extends SWTPartRenderer {
	@Inject
	Logger logger;
	@Inject
	IEventBroker eventBroker;
	@Inject
	private IPresentationEngine engine;
	private EventHandler itemUpdater = new EventHandler() {
		public void handleEvent(Event event) {
			
			if (!(event.getProperty(UIEvents.EventTags.ELEMENT) instanceof MToolItem))
				return;
			MToolItem itemModel = (MToolItem) event
					.getProperty(UIEvents.EventTags.ELEMENT);
			ToolItem toolItem = (ToolItem) itemModel.getWidget();
			
			if (toolItem == null)
				return;
			String attName = (String) event
					.getProperty(UIEvents.EventTags.ATTNAME);
			if (UIEvents.UILabel.LABEL.equals(attName)) {
				setItemText(itemModel, toolItem);
			} else if (UIEvents.UILabel.ICONURI.equals(attName)) {
				toolItem.setImage(getImage(itemModel));
			} else if (UIEvents.UILabel.TOOLTIP.equals(attName)) {
				toolItem.setToolTipText(getToolTipText(itemModel));